Are you a journalist looking for climate experts for COP28? We’ve got you covered

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We’ve got lots of media trained climate change experts. If you need an expert for an interview, here is a list of our experts you can approach. All media enquiries should be made via Victoria Tagg, our dedicated Media and PR Manager at the University of Bristol. 

Email victoria.tagg@bristol.ac.uk or call +44 (0)117 428 2489.

Climate change / climate emergency / climate science / climate-induced disasters

Dr Eunice Lo – expert in changes in extreme weather events such as heatwaves and cold spells, and how these changes translate to negative health outcomes including illnesses and deaths. Follow on Twitter/X @EuniceLoClimate.

Professor Daniela Schmidt – expert in the causes and effects of climate change on marine systems. Dani is also a Lead Author on the IPCC reports.

Dr Katerina Michalides – expert in drylands, drought and desertification and helping East African rural communities to adapt to droughts and future climate change. Follow on Twitter/X @_kmichaelides.

Professor Dann Mitchell – expert in how climate change alters the atmospheric circulation, extreme events, and impacts on human health. Dann is also a Met Office Chair. Follow on Twitter/X @ClimateDann.

Professor Dan Lunt – expert on past climate change, with a focus on understanding how and why climate has changed in the past and what we can learn about the future from the past. Dan is also a Lead Author on IPCC AR6. Follow on Twitter/X @ClimateSamwell.

Professor Jonathan Bamber – expert on the impact of melting land ice on sea level rise (SLR) and the response of the ocean to changes in freshwater forcing. Follow on Twitter/X @jlbamber

Professor Paul Bates CBE – expert in the science of flooding, risk and reducing threats to life and economic losses worldwide. Follow on Twitter/X @paul_d_bates

Dr Matt Palmer – expert in sea level and ocean heat content at the Met Office Hadley Centre and University of Bristol. Follow on Twitter/X @mpclimate.

Professor Guy Howard – expertise in building resilience and supporting adaptation in water systems, sanitation, health care facilities, and housing. Expert in wider infrastructure resilience assessment.

Net Zero / Energy / Renewables

Dr Caitlin Robinson – expert on energy poverty and energy justice and also in mapping ambient vulnerabilities in UK cities. Caitlin will be virtually attending COP28. Follow on Twitter/X @CaitHRobin.

Professor Philip Taylor – Expert in net zero, energy systems, energy storage, utilities, electric power distribution. Also Pro-Vice Chancellor at the University of Bristol. Follow on Twitter/X @rolyatlihp.

Dr Colin Nolden – expert in sustainable energy policyregulation and business models and interactions with secondary markets such as carbon markets and other sectors such as mobility. Colin will be in attendance in the Blue Zone at COP28 during week 2.

Professor Charl Faul – expert in novel functional materials for sustainable energy applications e.g. in CO2 capture and conversion and energy storage devices.  Follow on Twitter/X @Charl_FJ_Faul.

Climate finance / Loss and damage

Dr Rachel James – Expert in climate finance, damage, loss and decision making. Also has expertise in African climate systems and contemporary and future climate change. Follow on Twitter/X @_RachelJames.

Dr Katharina Richter – expert in decolonial environmental politics and equitable development in times of climate crises. Also an expert on degrowth and Buen Vivir, two alternatives to growth-based development from the Global North and South. Katarina will be virtually attending COP28. @DrKatRichter.

Climate justice

Dr Alix Dietzel – climate justice and climate policy expert. Focusing on the global and local scale and interested in how just the response to climate change is and how we can ensure a just transition. Alix will be in attendance in the Blue Zone at COP28 during week 1. Follow on Twitter/X @alixdietzel.

Dr Ed Atkins – expert on environmental and energy policy, politics and governance and how they must be equitable and inclusive. Also interested in local politics of climate change policies and energy generation and consumption. Follow on Twitter/X @edatkins_.

Dr Karen Tucker – expert on colonial politics of knowledge that shape encounters with indigenous knowledges, bodies and natures, and the decolonial practices that can reveal and remake them. Karen will be in attending the Blue Zone of COP28 in week 2.

Climate change and health

Dr Dan O’Hare – expert in climate anxiety and educational psychologist. Follow on Twitter/X @edpsydan.

Professor Dann Mitchell – expert in how climate change alters the atmospheric circulation, extreme events, and impacts on human health. Dann is also a Met Office Chair. Follow on Twitter/X @ClimateDann.

Dr Eunice Lo – expert in changes in extreme weather events such as heatwaves and cold spells, and how these changes translate to negative health outcomes including illnesses and deaths. Follow on Twitter/X @EuniceLoClimate.

Professor Guy Howard – expert in influence of climate change on infectious water-related disease, including waterborne disease and vector-borne disease.

Professor Rachael Gooberman-Hill – expert in health research, including long-term health conditions and design of ways to support and improve health. @EBIBristol (this account is only monitored in office hours).

Youth, children, education and skills

Dr Dan O’Hare – expert in climate anxiety in children and educational psychologist. Follow on Twitter/X @edpsydan.

Dr Camilla Morelli – expert in how children and young people imagine the future, asking what are the key challenges they face towards the adulthoods they desire and implementing impact strategies to make these desires attainable. Follow on Twitter/X @DrCamiMorelli.

Dr Helen Thomas-Hughes – expert in engaging, empowering, and inspiring diverse student bodies as collaborative environmental change makers. Also Lead of the Cabot Institute’s MScR in Global Environmental Challenges. Follow on Twitter/X @Researchhelen.

Professor Daniela Schmidt – expert in the causes and effects of climate change on marine systems. Dani is also a Lead Author on the IPCC reports. Also part of the Waves of Change project with Dr Camilla Morelli, looking at the intersection of social, economic and climatic impacts on young people’s lives and futures around the world.

Climate activism / Extinction Rebellion

Dr Oscar Berglund – expert on climate change activism and particularly Extinction Rebellion (XR) and the use of civil disobedience. Follow on Twitter @berglund_oscar.

Land / Nature / Food

Dr Jo House – expert on land and climate interactions, including emissions of carbon dioxide from land use change (e.g. deforestation), climate mitigation potential from the land (e.g. afforestationbioenergy), and implications of science for policy. Previously Government Office for Science’s Head of Climate Advice. Follow on Twitter @Drjohouse.

Professor Steve Simpson – expert marine biology and fish ecology, with particular interests in the behaviour of coral reef fishes, bioacoustics, effects of climate change on marine ecosystems, conservation and management. Follow on Twitter/X @DrSteveSimpson.

Dr Taro Takahashi – expert on farminglivestock production systems as well as programme evaluation and general equilibrium modelling of pasture and livestock-based economies.

Dr Maria Paula Escobar-Tello – expert on tensions and intersections between livestock farming and the environment.

Air pollution / Greenhouse gases

Dr Aoife Grant – expert in greenhouse gases and methane. Set up a monitoring station at Glasgow for COP26 to record emissions.

Professor Matt Rigby – expert on sources and sinks of greenhouse gases and ozone depleting substances. Follow on Twitter @TheOtherMRigby.

Professor Guy Howard – expert in contribution of waste and wastewater systems to methane emissions in low- and middle-income countries

Plastic and the environment

Dr Charlotte Lloyd – expert on the fate of chemicals in the terrestrial environment, including plasticsbioplastics and agricultural wastes. Follow on Twitter @DrCharlLloyd.

Cabot Institute for the Environment at COP28

We will have three media trained academics in attendance at the Blue Zone at COP28. These are: Dr Alix Dietzel (week 1), Dr Colin Nolden (week 2) and Dr Karen Tucker (week 2). We will also have two academics attending virtually: Dr Caitlin Robinson and Dr Katharina Richter.

Read more about COP on our website at https://bristol.ac.uk/cabot/what-we-do/projects/cop/
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This blog was written by Amanda Woodman-Hardy, Communications and Engagement Officer at the Cabot Institute for the Environment. Follow on Twitter @Enviro_Mand and @cabotinstitute.

Watch our Cabot Conversations – 10 conversations between 2 experts on a climate change issue, all whilst an artist listens in the background and interprets the conversation into a beautiful piece of art in real time. Find out more at bristol.ac.uk/cabot/conversations.

Bats are avoiding solar farms and scientists aren’t sure why

The common pipistrelle. Rudmer Zwerver/Shutterstock

As our planet continues to warm, the need for renewable energy is becoming increasingly urgent. Almost half of the UK’s electricity now comes from renewable sources. And solar accounts for one-fifth of the energy capacity installed since 2019.

Solar farms are now a striking feature of the British landscape. But despite their growth, we’re still largely in the dark about how solar farms impact biodiversity.

This was the focus of a recent study that I co-authored alongside colleagues from the University of Bristol. We found that bat activity is reduced at solar farms compared to neighbouring sites without solar panels.

This discovery is concerning. Bats are top predators of nighttime insects and are sensitive to changes in their habitats, so they are important indicators of ecosystem health. Bats also provide valuable services such as suppressing populations of insect pests.

Nonetheless, our results should not hinder the transition to renewable energy. Instead, they should help to craft strategies that not only encourage bat activity but also support the necessary expansion of clean energy sources.

An aerial shot of a solar farm in south Wales.
Solar farms are now a striking feature of the British landscape. steved_np3/Shutterstock

Reduced activity

We measured bat activity by recording their ultrasonic echolocation calls on bat detectors. Many bat species have distinctive echolocation calls, so we could identify call sequences for each species in many cases. Some species show similar calls, so we lumped them together in species groups.

We placed bat detectors in a solar farm field and a similar neighbouring field without solar panels (called the control site). The fields were matched in size, land use and boundary features (such as having similar hedges) as far as possible. The only major difference was whether they contained solar panels.

We monitored 19 pairs of these sites, each for a week, observing bat activity within the fields’ centre and along their boundaries. Field boundaries are used by bats for navigation and feeding.

Six of the eight bat species or groups studied were less active in the fields with solar panels compared to the fields without them. Common pipistrelles, which made up almost half of all bat activity, showed a decrease of 40% at the edges of solar panel fields and 86% in their centre. Other bat species or groups like soprano pipistrelles, noctules, serotines, myotis bats and long-eared bats also saw their activity drop.

Total bat activity was almost halved at the boundaries of solar panel fields compared to that of control sites. And at the centre of solar panel fields, bat activity dropped by two-thirds.

Why are bats avoiding solar farms?

Conflict between clean energy production and biodiversity isn’t just limited to solar farms; it’s an issue at wind farms too. Large numbers of bats are killed by colliding with the blades of wind turbines. In 2012, for example, one academic estimated that around 888,000 bats may have been killed at wind energy facilities in the United States.

The way solar farms affect bats is probably more indirect than this. Solar panels could, in theory, inadvertently reduce the abundance of insects by lowering the availability of the plants they feed on. We’re currently investigating whether there’s a difference in insect numbers at the solar farm sites compared to the control sites.

Solar panels may also reflect a bats’ echolocation calls, making insect detection more difficult. Reduced feeding success around the panels may result in fewer bats using the surrounding hedgerows for commuting, potentially explaining our findings.

However, bats are also known to collide with smooth vertical flat surfaces because they reflect echolocation calls away from bats and hence appear as empty space. Research has also found that bats sometimes attempt to drink from horizontal smooth surfaces because they interpret the perpendicular echoes as coming from still water. But, given the sloped orientation of solar panels, these potential direct effects may not be of primary concern.

Improving habitats

An important lesson from the development of wind energy is that win-win solutions exist. Ultrasonic acoustic deterrents can keep bats away from wind turbines, while slightly reducing the wind speed that turbines become operational at (known as “cut-in speeds”) has reduced bat fatality rates with minimal losses to energy production. Research suggests that increasing turbine cut-in speeds by 1.5 metres per second can reduce bat fatalities by at least 50%, with an annual loss to power output below 1%.

A slightly different approach could be applied to solar farms. Improving habitats by planting native trees along the boundaries of solar farm fields could potentially increase the availability of insects for bats to feed on.

Research that I have co-authored in recent years supports this theory. We found that the presence of landscape features such as tall hedgerows and even isolated trees on farmland has a positive effect on bat activity.

Carefully selecting solar sites is also important. Prior to construction, conducting environmental impact assessments could indicate the value of proposed sites to bat populations.

More radically, rethinking the siting of these sites so that most are placed on buildings or in areas that are rarely visited by bats, could limit their impact on bat populations.

Solar power is the fastest-growing source of renewable energy worldwide. Its capacity is projected to overtake natural gas by 2026 and coal by 2027. Ensuring that its ecological footprint remains minimal is now particularly important.

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This blog is written by Gareth Jones, Professor of Biological Sciences, University of Bristol. This article is republished from The Conversation under a Creative Commons license. Read the original article.

Why are neonicotinoids so polarised?

Bee on yellow flower

The use of neonicotinoid insecticides has been, and still is, a topic of huge controversy and dispute. To use an appropriate analogy, stakeholders appear to fall into one of two neighbouring fields, distinctly fenced off from one another.

In one field, there are those that believe that the scientific evidence revealing the impacts of neonicotinoid compounds on pollinators and the wider environment is more than sufficient to strictly ban their use as a pest management tool. In the other field, interested parties argue that the evidence is convoluted and context specific, and that in some circumstances neonicotinoid use can be a safe, and environmentally resourceful strategy.

But why has this topic become so polarised? And why is there increasingly less space for those that wish to ‘sit on the fence’? This blog summarises the research published in a recent paper by Hannah Romanowski and Lauren Blake. The paper investigates the causes of controversy, and analyses the viability of alternatives in the UK sugar beet system.

What are neonicotinoids?

Neonicotinoids (neonics) are a group of synthetic compounds used as the active ingredient in some insecticides. They are neuroactive, which means that they act on the nervous system of the insect, causing changes in behaviour. They specifically bind to receptors of the nicotinic acetylcholine (nAChRs) enzyme, which are specific to insects, meaning neonics have low toxicity to vertebrates, such as mammals. They are used to control a variety of pests, especially sap-feeding insects such as aphids. Neonics are a systemic pesticide, meaning that they are absorbed by the whole plant (either by seed coating or spraying) and distribute throughout all the plants tissue.

Are neonics legal in the UK?

That’s where things get confusing… the answer is both yes and no. In 2018, the UK prohibited the outdoor use of neonics following a review of the evidence about their risk to pollinators, published by the European Food Safety Authority. However, the UK and many other EU member states have since granted emergency authorisations, which allows the use of neonics under a set of specific circumstances and conditions. The best-known example of this in the UK is the emergency authorisations granted in 2021, 2022 and 2023 for the use of thiamethoxam, one of the banned neonicotinoid compounds, on sugar beet.

However, even if an emergency authorisation is approved by UK Government, the predicted virus incidence (forecasted by Rothamsted Insect Survey) in a given year must be above a decided threshold before authorisation is fully granted. If the threshold is not met, neonicotinoids use remains prohibited. In 2021 for example, Defra set the threshold at 9%, and since the forecast of the virus was only 8.37%, the neonicotinoid seed treatment was not used. The crop went on to grew successfully unscathed by the virus.

Why is sugar beet an exception?

The Expert Committee on Pesticides (ECP) produced a framework in 2020 that laid out a list of requirements for an emergency authorisation of a prohibited pesticide. Requirements include not having an alternative, adequate evidence of safety, limited scale and control of use, and evidence of a permanent solution in development. In essence, the long-term economic and environmental benefits of granting the temporary emergency authorisation must outweigh any potential adverse effects resulting from the authorisation.

Sugar beet farm in Switzerland
Sugar beet farm. Source: Volker Prasuhn, Wikimedia.

Sugar beet is extremely vulnerable to a yield-diminishing group of viruses known as yellows virus (YV). YV are transmitted by an aphid vector, Myzus persicae, which are effectively controlled by neonic seed treatment. Compared to other crop systems, sugar beet is also considered low risk and ‘safer’ as it does not flower before harvest and is therefore not as attractive to pollinator insects. As was found during the research of this paper, there are currently no alternatives as effective as neonics in this system, but long-term solutions are in development. Since sugar beet produces 60% of white sugar consumed in the UK, the economic and environmental impacts of yield loss (i.e. from sugar imports) would be serious. In 2021, the government felt that sugar beet sufficiently met the requirements outlined by the ECP, and emergency authorisation was granted.

What were the aims of this paper?

The main aim of this study was to identify the key issues associated with the debate surrounding the emergency authorisation of neonics on sugar beet, and evaluate and compare current policy with potential alternatives.

Most of the data for this study was collected through semi-structured interviews with nine respondents, each representing a key stakeholder in this discussion. Interviews took place in 2021, just after the announcement that neonics would not be authorised, despite granting the emergency authorisation, as the threshold was not met.

What did this research find?

The main take-home from this research was that uncertainty around the scientific evidence was not the biggest concern to respondents, as was predicted. Instead, respondents were alarmed at the level of polarisation of the narrative.  It was broadly felt that the neonicotinoid debate illustrates the wider issues around environment discussions, that are falsely perceived as a dichotomy, fuelled by media attention, and undermining of science.

The organisation of the sugar beet industry was also considered an issue. In east England, where sugar beet is grown, local growers supply only one buyer, British Sugar. This means that for British Sugar to meet demand they use a contractual system, whereby growers are contracted each year to meet a particular yield. This adds pressure to growers, and means that British Sugar controls the seed supply and therefore the treatment of seeds with synthetic pesticides. One respondent in the study said, “At one time you couldn’t order seed that wasn’t treated with neonicotinoid’.

The study also found that alternatives such as Integrated Pest Management (IPM) and Host Plant Resistance (HPR) were not yet effective in this system. There were 3 reasons why IPM fails. Firstly, sugar beet has a very low yield diminishing threshold for the virus, meaning that it does not take much infection to significantly effect yield. Secondly, the system is extremely specific, meaning that general IPM practices do not work and research on specific methods of IPM (such as natural predators of Myzus persicae) are limited. HPR is in development, and some new varieties of plant with host resistance have been produced, but the virus has multiple strains and no HPR varieties are resistant to all of them. Finally, there is no incentivisation for farmers to take up alternative practices. Due to the contract system, the risk to growers of sugar beet to try new pest management strategies is too high.

What is the latest in 2023?

In 2023, another emergency authorisation was granted, however the threshold set by Defra was increased to 63% virulence. In March, the Rothamsted Virus Yellows forecast predicted an incidence of 67.51%, and so the neonicotinoid seed treatment was used. With this authorisation there are still conditions that growers are required to meet to mitigate any risk to pollinators. This includes no flowering crops being grown for 32 months after neonic treated sugar beet has grown, using herbicides to reduce the number of flowering weeds that may attract pollinators to the field growing treated sugar beet, and compliance with stewardship schemes such as monitoring of neonicotinoid residues in the environment.

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This blog is written by Hannah Romanowski, Biological Sciences, University of Bristol. The paper that this blog is based on can be found here: https://link.springer.com/article/10.1007/s13412-023-00830-z.

Hannah Romanowski

 

Climate change is threatening Madagascar’s famous forests – our study shows how serious it is

Urgent action is needed to protect Madagascar’s forests.
Rijasolo/AFP via Getty Images

Global climate change doesn’t only cause the melting of polar ice caps, rising sea levels and extreme weather events. It also has a direct effect on many tropical habitats and the animals and plants that inhabit them. As fossil fuel emissions continue to drive climate change, large areas of land are forecast to become much hotter and drier by the end of this century.

Many ecosystems, including tropical forests, wetlands, swamps and mangroves, will be unable to cope with these extreme climatic conditions. It is highly likely that the extent and condition of these ecosystems will decline. They will become more like deserts and savanna.

The island nation of Madagascar is of particular concern when it comes to climate change. Of Madagascar’s animal species, 85% cannot be found elsewhere on Earth. Of its plant species, 82% are unique to the island. Although a global biodiversity hotspot, Madagascar has experienced the highest rates of deforestation anywhere in the world. Over 80% of its original forest cover has already been cleared by humans.

This has resulted in large population declines in many species. For example, many species of lemurs (Madagascar’s flagship group of animals) have undergone rapid population decline, and over 95% of lemur species are now classified as threatened on the International Union for Conservation of Nature (IUCN) Red List.

Drier conditions brought about by climate change have already resulted in widespread bush fires throughout Madagascar. Drought and famine are increasingly severe for the people living in the far south and south-western regions of the island.

Madagascar’s future will likely depend profoundly on how swiftly and comprehensively humans deal with the current climate crisis.

What we found

Our study investigated how future climate change is likely to affect four of Madagascar’s key forest habitat types. These four forest types are the dry deciduous forests of the west, humid evergreen forests of the east, spiny bush forests of the arid south, and transitional forests of the north-west corner of the island.

Using computer-based modelling, we simulated how each forest type would respond to climate change from the current period up to the year 2080. The model used the known distribution of each forest type, and current and future climatic data.

We did this under two different conditions: a mitigation scenario, assuming human reliance on greenhouse gas reduces according to climate commitments already made; and an unmitigated scenario, assuming greenhouse gas emissions continue to increase at their current rate.

Our results suggest that unmitigated climate change will result in declines of Madagascar’s forests. The area of land covered by humid forest, the most extensive of the four forest types, is predicted to decrease by about 5.66%. Dry forest and spiny bush are also predicted to decline in response to unmitigated climate change. Transitional forest may actually increase by as much as 5.24%, but this gain will almost certainly come at the expense of other forest types.

We expected our model to show that mitigating climate change would result in net forest gain. Surprisingly, our results suggest entirely the opposite. Forest occurrence will decrease by up to 5.84%, even with efforts to mitigate climate change. This is because global temperatures are forecast to increase under both mitigated and unmitigated scenarios.

These predicted declines are in addition to the huge losses of forest already caused by ongoing deforestation throughout the island.

It looks as if the damage has already been done.

Climate change, a major threat

The results of our research highlight that climate change is indeed a major threat to Madagascar’s forests and likely other ecosystems worldwide. These findings are deeply concerning for the survival of Madagascar’s animals and plants, many of which depend entirely on forest habitat.

Not only will climate change decrease the size of existing forests, changes in temperature and rainfall will also affect the amount of fruit that trees produce.

A Lemur on tree in the forest.
Madagascar lemurs and other animal and plant species may become extinct if the forests disappear.
Rijasolo/AFP

Many of Madagascar’s animals, such as its lemurs, rely heavily on fruit for food. Changes in fruit availability will have serious impact on the health, reproductive success and population growth of these animals. Some animals may be able to adapt to changes in climate and habitat, but others are very sensitive to such changes. They are unlikely to survive in a hot, arid environment.

This will also have serious knock-on effects for human populations that depend on forests and animals for eco-tourism income. Approximately 75% of Madagascar’s population depends on the forest and subsistence farming for survival, and the tourism sector contributes over US$600 million towards the island’s economy annually.

To ensure that Madagascar’s forests survive, immediate action is needed to end deforestation, protect the remaining patches of forest, replant and restore forests, and mitigate global carbon emissions. Otherwise these remarkable forests will eventually disappear, along with all the animals and plants that depend on them.The Conversation

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This blog is written by Daniel Hending, Postdoctoral Research Assistant Animal Vibration Lab, University of Oxford and Cabot Institute for the Environment member Marc Holderied, Professor in Sensory Biology, University of BristolThis article is republished from The Conversation under a Creative Commons license. Read the original article.

Marc Holderied

 

 

Insects will struggle to keep pace with global temperature rise – which could be bad news for humans

Animals can only endure temperatures within a given range. The upper and lower temperatures of this range are called its critical thermal limits. As these limits are exceeded, an animal must either adjust or migrate to a cooler climate.

However, temperatures are rising across the world at a rapid pace. The record-breaking heatwaves experienced across Europe this summer are indicative of this. Heatwaves such as these can cause temperatures to regularly surpass critical thermal limits, endangering many species.

In a new study, my colleagues and I assessed how well 102 species of insect can adjust their critical thermal limits to survive temperature extremes. We found that insects have a weak capacity to do so, making them particularly vulnerable to climate change.

The impact of climate change on insects could have profound consequences for human life. Many insect species serve important ecological functions while the movement of others can disrupt the balance of ecosystems.

How do animals adjust to temperature extremes?

An animal can extend its critical thermal limits through either acclimation or adaptation.

Acclimation occurs within an animal’s lifetime (often within hours). It’s the process by which previous exposure helps give an animal or insect protection against later environmental stress. Humans acclimate to intense UV exposure through gradual tanning which later protects skin against harmful UV rays.

One way insects acclimate is by producing heat shock proteins in response to heat exposure. This prevents cells dying under temperature extremes.

A ladybird drinking a speck of water on a narrow leaf.
Insects in warmer environments develop fewer spots to reduce heat retention.
mehmetkrc/Shutterstock

Some insects can also use colour to acclimate. Ladybirds that develop in warm environments emerge from the pupal stage with less spots than insects that develop in the cold. As darker spots absorb heat, having fewer spots keeps the insect cooler.

Adaptation occurs when useful genes are passed through generations via evolution. There are multiple examples of animals evolving in response to climate change.

Over the past 150 years, some Australian parrot species such as gang-gang cockatoos and red-rumped parrots have evolved larger beaks. As a greater quantity of blood can be diverted to a larger beak, more heat can be lost into the surrounding environment.

A colourful red-rumped parrot perched on a branch.
The red-rumped parrot has evolved a larger beak to cope with higher temperatures.
Alamin-Khan/Shutterstock

But evolution occurs over a longer period than acclimation and may not allow critical thermal limits to adjust in line with the current pace of global temperature rise. Upper thermal limits are particularly slow to evolve, which may be due to the large genetic changes required for greater heat tolerance.

Research into how acclimation might help animals survive exceptional temperature rise has therefore become an area of growing scientific interest.

A weak ability to adjust to temperature extremes

When exposed to a 1℃ change in temperature, we found that insects could only modify their upper thermal limit by around 10% and their lower limit by around 15% on average. In comparison, a separate study found that fish and crustaceans could modify their limits by around 30%.

But we found that there are windows during development where an insect has a greater tolerance towards heat. As juvenile insects are less mobile than adults, they are less able to use their behaviour to modify their temperature. A caterpillar in its cocoon stage, for example, cannot move into the shade to escape the heat.

Exposed to greater temperature variations, this immobile life stage has faced strong evolutionary pressure to develop mechanisms to withstand temperature stress. Juvenile insects generally had a greater capacity for acclimating to rising temperatures than adult insects. Juveniles were able to modify their upper thermal limit by 11% on average, compared to 7% for adults.

But given that their capacity to acclimate is still relatively weak and may fall as an insect leaves this life stage, the impact is likely to be limited for adjusting to future climate change.

What does this mean for the future?

A weak ability to adjust to higher temperatures will mean many insects will need to migrate to cooler climates in order to survive. The movement of insects into new environments could upset the delicate balance of ecosystems.

Insect pests account for the loss of 40% of global crop production. As their geographical distribution changes, pests could further threaten food security. A UN report from 2021 concluded that fall armyworm populations, which feed on crops such as maize, have already expanded their range due to climate change.

A damaged corn crop following an attack by fall armyworms.
The fall armyworm is a damaging crop pest which is spreading due to climate change.
Alchemist from India/Shutterstock

Insect migration may also carry profound impacts on human health. Many of the major diseases affecting humans, including malaria, are transmitted by insects. The movement of insects over time increases the possibility of introducing infectious diseases to higher latitudes.

There have been over 770 cases of West Nile virus recorded in Europe this year. Italy’s Veneto region, where the majority of the cases originate, has emerged as an ideal habitat for Culex mosquitoes, which can host and transmit the virus. Earlier this year, scientists found that the number of mosquitoes in the region had increased by 27%.

Insect species incapable of migrating may also become extinct. This is of concern because many insects perform important ecological functions. Three quarters of the crops produced globally are fertilised by pollinators. Their loss could cause a sharp reduction in global food production.

The vulnerability of insects to temperature extremes means that we face an uncertain and worrying future if we cannot curb the pace of climate change. A clear way of protecting these species is to slow the pace of climate change by reducing fossil fuel consumption. On a smaller scale, the creation of shady habitats, which contain cooler microclimates, could provide essential respite for insects facing rising temperatures.The Conversation

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This blog is written by Hester Weaving, PhD Candidate in Entomology, University of BristolThis article is republished from The Conversation under a Creative Commons license. Read the original article.

Hester Weaving

 

 

The night is full of animal life, but scientists know very little about it

 

Naturalists and life scientists have long debated how insect-eating bats navigate their dark world.
Sarun T/Shutterstock

Human disturbance is rapidly changing the nature of the nocturnal world. Intensive farming, suburban spread, artificially lit cities, and continuously busy road systems mean daytime species are becoming increasingly active throughout the night. Ecologists suggest that the majority of land animals are either nocturnal or active across both the day and night.

Recent research has also shown that the night is warming considerably faster than the day. The stifling night-time heat experienced across Europe this summer is indicative of this, placing nocturnal animals under even greater stress.

The transforming night adds new sensory pressures concerning finding food, a mate, and navigating a world permeated by artificial illumination. Environmental change is severely threatening the ability of nocturnal animals to coexist with humans. The conservation of nocturnal species has therefore become urgent.

Despite the abundance of night-time life, the understanding of nocturnal species has evaded science throughout history. Physical restraints on human navigation in the dark are partially responsible for this. This scientific blind spot is referred to as the “nocturnal problem”.

The legacy of this inaccessibility remains a barrier to our understanding of nocturnal life today. However, given the environmental threat now facing the nocturnal world, this will have profound consequences should it remain unaddressed. A better understanding of nocturnal life is critical to ensure its effective protection.

The origins of the ‘nocturnal problem’

So how did the nocturnal problem arise and why does it still impede science?

Constrained by their own reliance on vision, early scientists struggled to imagine the different ways in which animals might navigate in the dark. The myths that built up around familiar nocturnal creatures, such as hedgehogs, are evidence of historical attempts to fill the scientific gap.

The Greek philosopher Aristotle suggested that hedgehogs poached apples and carried them off on their spines. Such mythology was commonly included within Victorian natural history texts as an introduction to more factual descriptions of hedgehog anatomy, such as their capacity for smell and other bodily adaptations.

A hedgehog passing a road with a car light illuminating the background.
Even the experiences of hedgehogs remain to some degree unknown.
Lukasz Walas/Shutterstock

But even artificial illumination afforded very limited access. Illumination fundamentally changes the nature of the nocturnal world, with impacts on animal behaviour. A good example is the attraction of moths to street lights.

The historical debate surrounding how insect-eating bats navigate their dark world illustrates the problem. Numerous attempts have been made to understand bat senses. However, it was not until the late 1930s, more than 150 years after experimentation on bats had begun, that the scientists Donald R. Griffin and Robert Galambos identified echolocation – the ability to navigate via the emission and detection of sound signals.

Griffin would later describe the secrets of bat senses as a “magic well”, acknowledging the fundamental challenge of comprehending senses so different from our own.

But efforts to understand nocturnal senses could only take scientists so far. In 1940, American naturalist Orlando Park declared that the biological sciences suffered from a “nocturnal problem”, in reference to the continued inability to understand the nocturnal world. This was reflected in the more recent philosophical text of Thomas Nagel, which posed the question what it like is to like to be a bat?

Persistence of the nocturnal problem

Despite technological developments, including the introduction of infrared photography, aspects of nocturnal life continue to elude modern science.

While technology has afforded scientists a much better understanding of echolocation in bats, our way of thinking about bat senses remains limited by our own dependence on vision. When describing echolocation, scientists still suggest that bats “see” using echoes.

The elusive Australian Night Parrot was presumed extinct for much of the 20th century. Although they have been recently rediscovered, scientists remain unable to estimate their population size accurately while questions over the threats facing the species persist.

Despite an improvement in scientific research, nocturnal life remains understudied. In 2019, life scientist Kevin J. Gaston called for an expansion of research into nocturnal life. History shows us that when there are scientific gaps in knowledge about the night, cultures create their own truths to fill those gaps. The consequences of doing so may be significant.

The night is ecologically rich and efforts to fill these gaps in scientific understanding should be prioritised. The nocturnal world is threatened by environmental change, and its future depends on our commitment to getting to know the darkness.The Conversation

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This blog is written by Cabot Institute for the Environment members, Dr Andy Flack, Senior Lecturer in Modern and Environmental History, University of Bristol and Dr Alice Would, Lecturer in Imperial and Environmental History, University of BristolThis article is republished from The Conversation under a Creative Commons license. Read the original article.

The Farmer of Myddfai

Above the village of Myddfai, Escairllaethdy Farm stretches over 150 acres. The farm, which lies on the western edge of the Brecon Beacons at the foot of the Black Mountains, has been in Hywel Morgan’s family since his grandfather bought it after the Second World War. It’s an upland livestock farm, and Hywel also has grazing rights on the common land on Mynydd Myddfai for his sheep, horses, and, more recently, cattle. He describes himself as a hill farmer, and one who is especially passionate about the hills.

For the past five years Hywel has been gradually reducing the impact of his farming methods on the land. In an interview in March 2022, he told me more about how this came about. In the wake of Brexit, Hywel met with a Welsh civil servant and asked him what was really required of farmers in this new political context. The reply was that what the Government wanted was for farmers to farm “with nature”. This set Hywel on a journey of discovery that included a study-tour with the Farming Connect Management and Exchange scheme, investigating low-impact farming in Britain and continental Europe, as well as a visit to the Food and Farming conference in Aberystwyth, where he found disappointingly few farmers but did discover a stand for the Nature Friendly Farming Network. He decided to get involved.

Hywel’s move into lower-impact, nature-friendly farming has had a number of practical results. One is in the amount of hedgerow now on the farm. He explained: “I’ve put in about a thousand metres of double fencing every year for the past five years for hedgerow restoration, whether that is planting new hedges, coppicing hedges, or hedge-laying”. He has also been letting the hedges grow taller, sometimes leaving them for three years before cutting them. He says with a sense of pride, “All of a sudden I saw all these birds around in later winter”.  The beneficial effects of the hedges are visible in the summer too, reflected in the behaviour of the livestock. Hywel has noticed that on hot summer days his sheep and cows hide in the shade of the hedges, “and when the sun moves they move with the shade”. He adds, “Watching your animals tells you a lot”. He has also given up using artificial fertiliser and cut down on pharmaceuticals. Where he used to spray off a field of grass with Roundup and drill swedes for the sheep, he now conserves the grass for winter feed.

Farming in a nature-friendly way has involved some changes in the kind of livestock Hywel keeps on the land. He has introduced Highland cattle to his herd, and practises conservation grazing with all of his cattle. The Highlands live up on the hill and Hywel can already see how this stimulates greater biodiversity. In this respect cattle do better than sheep, “because sheep will nibble the short sweet grass right down. The cattle will just trample it for a start, and by trampling it they’re putting organic matter back into the soil and regenerating it a bit”. The hoof impact helps to create habitat for invertebrates and the browsing methods of the cattle “will leave a bit more over for nature”.

How much to leave for nature is a potentially difficult question given that farms are businesses and need to be run as such. Hywel admits that “production-wise it isn’t fantastic because you’re producing less meat per acre or per hectare”, but he argues with great conviction that “we have to have this balance of food production and nature – biodiversity and wildlife – and finding the sweet spot between biodiversity and productivity is key”.

Hywel’s relationship with this landscape is steeped in its history as well as invested in its future. Myddfai is a kind of hallowed ground, the ancient home of the legendary Lady of the Lake and the Physicians of Myddfai, The story of the mysterious Lady and her children, who began a tradition of healers in the village that continued for hundreds of years, was included in The Red Book of Hergest which dates from the late 14th century. Among other tales, the manuscript tells the story of the son of a famer killed fighting to preserve the independence of Wales, who while wandering along the edge of Llyn y Fan Fach, saw a beautiful woman sitting on the surface of the lake. He fell in love with her and wooed her with gifts of bread. On the third occasion, with the bread cooked exactly to her liking, the woman agreed to marry him and stay with him “until she received from him three blows, without any cause”.[i] It was a long time before the man landed the third blow on his wife, but true to her word, she left him and returned to the Lake. The story might be read as a stark warning against domestic violence. But there is a more positive kind of sequel. The couple had three sons and the mother sometimes appeared to them, teaching them about the medicinal qualities of the plants to be found in the area. The boys grew up to become skilful physicians who then recorded their knowledge in writing, “for the benefit of mankind throughout all the ages”.

In a quiet and modest way, Hywel thinks of himself as the inheritor this tradition of herbal knowledge. He has begun planting herbal leys in preference to rye grass because, as he says, “if I can’t grow them, who should?” As a society, we are probably only just beginning to discover how much can be learnt from the herbal medicines of the past. In part this is because the awareness of such sophisticated knowledge and wisdom has been obscured by more dominant, often urban-centric narratives. While the Enlightenment represented a huge advance in knowledge in some areas of the British Isles, the historian David Gange has written of how it benefited the big cities of the British Isles but actually heralded an age of darkness for other areas of the archipelago. In Wales it contributed to the suppression of the histories of the Age of the Saints, a period of intense Christian activity linked with learning and with the emergence of a deeply rooted Welsh culture.

Hywel takes inspiration from this ancient past as well as trying to draw on the practices of his own more recent ancestors. In some respects, regenerative farming means remembering agricultural methods from before the industrialisation of farming – which took place most significantly in the wake of the Second World War and the Agriculture Act of 1947. Farmers involved in nature-friendly farming often look back not to their fathers’ generation for wisdom but to that of their grandfathers and great-grandfathers, who were farming before the intensification of agriculture really took hold. In some ways, those generations modelled a way of life that seems preferable to the pressured lives of contemporary farmers. Hywel admits: “But hearing my father repeating stories about my grandad, his dad, I thought how fantastic life sounded. Hard, but just going up on a hill on horseback and chatting to a fellow grazier for hours and hours on end”. Now, in contrast, he says: “I feel like we’re just working. Like we’re running faster to stand still at the moment, because even at 15 I had my own sheep, and I pretty much had the same money then as I’m having now. It hasn’t changed. The price of fertiliser and feed and fuel and everything’s gone up crazy, but what we get for the end product hasn’t”.

The stories from the past, both ancient and more modern are significant. They speak of a tradition of farming on the Welsh uplands that has been in place for millennia. This tradition reflects a particularly deep relationship with the landscape built through hard toil and a commitment to learning the character of the land itself. Hywel’s story is an important counter to some of the current rewilding narratives that, at their most extreme, seem to suggest that the uplands would be better left untouched by farming of any kind. It is because of his careful stewardship that his land is flourishing.

Part of this process involves learning to see how the landscape might begin to heal itself. In a sense, Hywel is continuing in the tradition of the Physicians of Myddfai. Farmers like him are physicians of the land: wise practitioners who don’t impose a range of chemically based industrial-style remedies on the earth, but as the medieval Physicans of Myddfai were reputed to do, find ways of helping the patient through small interventions. This means moving away from the big-ag big pharma model in which agriculture is dominated by pharmaceutical companies and their agrochemicals, and thinking about what the land itself can do.

But regenerative farming does not just mean looking back in time. What struck me most when I first visited Esgairllaethdy was the way in which the wisdom of the past was being combined with some extraordinary contemporary technology. The Highland cattle on the hill wear collars fitted with GPS equipment. The collars enable Hywel to monitor where the cattle are and control their movement by setting up virtual fences using an app on his phone. When the cattle cross the boundary of the virtual field that Hywel maps out for them, the collars emit a high-pitched sound that causes them to step back into their allocated area. He tells me: “I think, in time, I’ll be able to manage without the collars, because the cattle will get used to the place”.

While Lyn y Fan Fach, the lake from which the legendary Lady emerged is two miles from Hywel’s farm, up on the mountain that adjoins his land, Hywel does now have a mini-lake of his own. He had always wanted a pond on his farm and two year’s into his membership of Glastir Advanced (a whole-farm sustainable land management scheme), he decided to build one. While some construction issues meant that the pond sometimes dries out, when the rain comes it creates a pool. After four days of heavy rain last Autumn, Hywel says, “the pond was full to overflowing”. He has witnessed how the pond has brought new species to the farm: “There was a duck there yesterday, there’s a heron, there’ll be Canadian geese, there’s all sorts of insects, dragonflies, around there”.

When I first visited Esgairllaethy in October 2021, I was at a low ebb: like everyone else, I was reeling from the practical and emotional effects of eighteen months of the pandemic, and from environmental fears prompted by the findings of the 2021 IPCC report and the figures for bioversity decline that came out before COP2021. But walking in the drizzling rain on the Open Farm Day walk, I felt buoyed up by an unexpected sense of hope. Here we were, in the midst of a vibrant landscape nurtured by a farmer whose deep love for the place and growing knowledge of its needs inform his farming practices. Species declining elsewhere are still present here and increasing in number – the hare, the curlew, and the skylark – and species new to the farm are arriving. With a newfound optimism, I thought of how the pond is providing a haven for passing waterfowl; how the Highland cattle on the hill are disturbing the ground, making new habitats for invertebrates and encouraging the growth of rare plants; and how the restored hedges are providing shelter for overwintering birds and shade for the livestock in summer. There’s a strong sense here of how the land is gradually recovering its health and how we in turn might heal our relationship with it.

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Pippa Marland

Excerpts from the interview with Hywel Morgan are quoted here with his kind consent.

This blog is written by Pen and Plough researcher Dr Pippa Marland and is based on her interview with Hywel Morgan (https://thepenandtheplough.wordpress.com/2022/05/17/an-interview-with-nature-friendly-farmer-hywel-morgan-pippa-marland/) and published with his permission. Illustrations by Katie Marland. This blog has been reposted with kind permission from Pippa Marland. View the original blog.

Katie Marland is an artist and illustrator based between Bristol and London, where she recently completed her masters at the Royal Drawing School. Her practice is research-led, working from esoteric texts, medical history, museum collections and from close observation of the natural world. Her work can be found on her website, on instagram @kmarlandart, and on twitter @kmarlandart.

[i] Additional information about the stories of the Lady of Lake and the Physcians of Myddfai is drawn from Terry Breverton’s (2012) The Physicians of Myddfai: Cures and Remedies of the Mediaeval World (Carmarthenshire: Cambrian Books).

IPCC blog series – Working Group 2 – Impacts, Adaptation and Vulnerability

 

 

This blog is part of a series from the Cabot Institute for the Environment on the Intergovernmental Panel on Climate Change’s recent sixth Assessment report, with this post covering the output of Working Group 2 and the impacts of climate change on society and ecosystems. This article also features a chat with Prof Daniela Schmidt, a Professor at the School of Earth Sciences at the University of Bristol, and a Lead Author on the IPCC’s AR6 report. For links to the rest of the series, see the bottom of the post.

Welcome to the next post in this series on the IPCC sixth Assessment Report (AR6). Now that we’ve covered the background science to climate change, the next phase looks at the impacts on society, ecosystems, and the intricate fabric of everything in between – combining the science and aiding the transition of translating to policies that governments can implement to better the planet and mitigate the impacts.

This report is, in my opinion, the most alarming of the bunch – some scientists referring to this as the “bleakest warning yet”. Here are the key points:

The increased frequency of Extreme Weather and Temperature will have a cataclysmic impact – Everywhere will be affected

There is no inhabited region on earth that escapes the impacts of climate change. It’s estimated that over 3.3 billion people are living in areas highly vulnerable to climate change effects – largely extreme temperatures, leading to food insecurity and water shortages. Extreme weather events, such as tropical storms and flooding, are also set to increase in both frequency and severity.

As we’ve seen in recent years, wildfires have become more common (Australia and California making international news) and will continue to rise in frequency – wreaking devastation on communities and wildlife. This, along with the retreat of glaciers and polar ice caps, also results in a release of even more carbon to the atmosphere as the Earth’s natural carbon sinks continue to be dismantled. The ensuing feedback loop amplifies the warming, only serving to increase the severity of these events.

However, the impacts of climate change won’t be experienced uniformly across the planet…

The Impacts of Climate Change will not be experienced equally

This is one of the most important statements from all three Working Groups. It’s been well reported that sea level rise will be existentially cataclysmic for atoll island nations such as Kiribati and the Maldives, but there are other effects of climate change that will be unequally experienced. At the other end of the scale, Britain and other western European nations will see less drastic impacts, despite having some of the greatest contribution to the emissions at the root of the climate crisis. In summer, some parts of the globe are already becoming unliveable due to the extremely high temperatures. In India and Africa for example, where temperatures can exceed 40 degrees C, the number of deaths due to heat are increasing year on year. Poorer communities, especially those who work outdoors, are disproportionately affected as their occupation puts them at greater risk.

Some of the nations with the lowest development and therefore lowest contribution to climate change will experience the impacts more than some of the greatest contributors.

A Climate Crisis exacerbates other ongoing Crises

The effects of a climate crisis add an extra layer of complexity to all sorts of problems the world is already facing. Threats to food and water security because of climate change will increase pre-existing geopolitical tensions as resources become more and more scarce. Therefore, the likelihood of conflict and war increases – which in turn shift focus from fighting climate change. To some extent, we are seeing this already with the war in Ukraine, for example. In summary, climate change can increase severity of a crisis and limits the efficacy of response.

Impacts on ecosystems are already happening as well

Mass die-offs of species are well underway, particularly in oceanic ecosystems as sea temperatures rise and ocean acidification takes place. Deforestation and wildfires are destroying ecosystems.

When I spoke to Professor Daniela Schmidt, a lead author on the WGII report (more from her at the end of the article), she was quick to point out and stress the connections between nature and society, links often underestimated – “Negative impacts on nature will negatively impact people”. Nature, land-use, and conservation will be some of the key tools in helping mitigate the effects of climate change.

This is something to explore further with the next blog in this series on Working Group 3: Mitigation of Climate Change.

Insight from IPCC AR6 Lead Author Professor Daniela Schmidt 

Daniela Schmidt is a Professor of Palaeobiology, Cabot Institute member and a key author on the IPCC’s WG2 report.

How did you get involved with IPCC AR6 and Working Group II in particular?

“I was a lead author on the fifth assessment report, working on the ocean chapter. I have since worked on reports for the European Commission on food from the ocean. I volunteered for this cycle with the expectation of working with WGI but I was assigned work on WGII, which was challenging because it was way out of my comfort zone. Working on this report has changed the way I will conduct research in the future, and has taught me to be more open to the complexities of life”

What’s one key point you’d like to get across from the WGII report?

“The official key strapline from AR6 is that the evidence is clear, climate change is real and happening right now. It’s a rapidly closing window of opportunity to do something about it.”

“One of the main things I like to communicate is that if we don’t hit 1.5 degrees C targets, then 1.7 degrees C is still better than for 2 degrees C example. The point is that every increment matters and that we can’t give up if we miss targets. I think it’s important to tell people that if we are overshooting 1.5 degrees C, yes, there will be consequences, some of which are irreversible, but we can still come back.”

“I also try not just to talk about climate change. Much of the adaptation action for climate change incidentally will, in my view, help to make the world a better place – providing clean drinking water, clean energy, habitable homes and ensuring there is nature surrounding them

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We recommend taking a look at the IPCC’s full reports and report summaries for yourself if you seek to further understand the evidence and reasoning behind their headline statements.

Going further, potential solutions and climate change mitigations will be covered in greater detail in our summary of WG3’s report titled “Mitigation of Climate Change”, will be the next blog in this series, featuring a chat with IPCC AR6 Lead Author Dr. Jo House and contributor Viola Heinrich.

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Andy Lyford

This blog was written by Cabot Communications Assistant Andy Lyford, an MScR Student studying Paleoclimates and Climate modelling on the Cabot Institute Master’s by Research in Global Environmental Challenges at the University of Bristol.

Eurofisch: hyper-mobility, cosmopolitanism and the European eel’s appeal

Unlike the Atlantic salmon, the snake-like European eel (Anguilla anguilla) is widely perceived as devoid of charisma. An epic reproductive journey is integral to the salmon’s appeal. But an equally spectacular migration, if in reverse, defines the European eel. The sea-dwelling salmon returns to its freshwater origins. The freshwater-inhabiting eel goes back to its oceanic birthplace. Natural distribution represents another key point of similarity and difference. The salmon spans the North Atlantic, its European breeding grounds confined to more northerly freshwaters. The European eel, with its broader temperature tolerance, populates a wider latitude. Its habitat ranges from southern Iceland and Russia’s Kola Peninsula to the southern Mediterranean – despite the name, North Africa’s rivers and lagoons contain this eel species – and, on the Atlantic coast, as far down as the Canaries. From west to east, they are distributed from the Azores to Georgia.

Figure 1: ‘Artisanal’ dipnet fishing for elvers from the bank of the River Severn at Wainlode, Gloucestershire, on a spring evening in 2017 (Image: Environment Agency. Reproduced by permission of the Sustainable Eel Group). 

The eel’s Europeanness is most vividly demonstrated by its genes. Whereas the salmon displays high genetic diversity and reproductively discrete local populations, European eels all belong to the same breeding population. This singular, panmictic identity is rooted in a shared birthplace: the West Central Atlantic’s Sargasso Sea is a melting pot where every eel of the opposite sex is a potential breeding partner. And the place the next generation calls home could be anywhere within the species’ European range. Lacking the salmon’s homing instinct, the offspring of eel parents that spent their adult lives in Norwegian and Tunisian waterbodies respectively might settle in Wales. Alternatively, this progeny could end up in Portuguese freshwaters, or wherever the currents carry the tiny larvae (leptocephali) during their up-to-three-year odyssey. The European eel is the only truly pan-European fish: a paragon of cosmopolitanism I call ‘Eurofisch’.

On reaching western Europe, leptocephali metamorphose into glass eels. Shoals of these transparent mini-eels – also known as elvers in the UK – start entering southern Europe’s estuaries in December. But in 2012, fisheries scientists reported that ‘recruitment’ had fallen by up to 95 per cent since 1970. An Extinction Rebellion event in Yeovil, Somerset, in the summer of 2019, underscored the species’ critically endangered status. Protestors dressed as eels participated in a ‘drown in’ and a ‘European eel’ addressed South Somerset District Council.

I’ve recently examined the reasons for this drastic decline; tracked the emergence of concern; considered the remedies; looked at trafficking in glass eels for East Asia’s ‘grow-out’ farms that a Plymouth University project has characterized as an ‘unnatural migration’; and reflected on the prospects of eel appeal spreading. Mobilising popular support for eels is more difficult than drumming up enthusiasm for mammals, either terrestrial and marine (for example, ‘T-shirt’ animals such as pandas, polar bears, whales and dolphins). Few who have seen the 1979 movie version of Günter Grass’ novel, The Tin Drum (1959), will forget the stomach-churning scene on the Baltic beach near Danzig (Gdansk) where a fisherman hauls in a horse’s head writhing with eels that he pulls from ears, nostrils and throat.

Figure 2: Elvers wriggling upstream at Bradford on Tone, Somerset Levels, UK in April 2014. (Image: Andrew Kerr. Reproduced by permission of the Sustainable Eel Group). 

What I’d like to convey here is the richness of Europe’s eel heritage and how Eurofisch illuminates what it means to be European. The silver eel (the final, Sargasso-ready life stage) has the highest calorific value of any European fish. A venerable and varied culture of consumption unites Europe, from Spain to Sweden and from Ireland to Italy. Since early Christianity, roast eel has been the dish customarily served at midnight on Christmas Eve in Rome and Naples. The epicentre of Italian eel gastronomy, though, is Comacchio. Since the 1300s, this town in the Po Delta has hosted a silver eel fishery based on lagoons stocked with glass eels entering from the Adriatic. Eels are skewered and roasted, marinated in barrels, then canned. La Donna del Fiume (1955) starred Sophia Loren as an impossibly glamorous worker in a Comacchio cannery that’s now a museum.

In the early 1900s, glass eels were swept up hyper-tidal estuaries such as the Severn, Loire, Gironde, Minho and Tagus in tremendous quantities: surpluses were fed to pigs, fertilised vegetable plots and made into glue. In France, glass eels were boiled and served cold (‘spaghetti with eyes’). Meanwhile, in Severn estuary villages, super-abundant elvers were fried in butter or bacon fat, scrambled with eggs, or boiled and pressed into gelatinous, fried cakes. In Victorian London’s East End, whose labouring population could not afford salmon or meat, itinerant vendors of stewed and jellied eel and the ‘eel and pie’ shop were odoriferous fixtures of the cityscape. Dutch traders were supplying London by 1400 and in the late 1600s schuyts – ships fitted with wells for live export – established a mooring near Billingsgate fish market. Squirming cargos arrived almost daily until the early 1900s; the last schuyt docked in 1938.

In Frampton-on-Severn, the Easter Monday elver eating competition was woven deeply into village life. Male contestants gobbled down a pound of fried elvers. A contest for women (only required to consume half a pound) was founded in 1973. With steeply declining numbers and sharply rising prices, the contest was cancelled in 1990. Revival followed in 2015 – with ersatz elvers known as gulas, produced in Spain’s Basque country. Dubbed ‘elvers’ locally, gulas consist of surimi, blocks of fish paste from Alaskan pollack and Pacific whiting.

In June 2019, the Sustainable Eel Group, a science-led, Europe-wide campaign organisation, marked its tenth anniversary with a two-day meeting at the Natural History Museum and a week-long eel celebration. A highlight was the arrival at ‘Dutch Mooring’ of a reconstructed schuyt, absent from London’s riverscape for over 80 years. My visit coincided with that of Pieter Hak, proprietor of the Noted Eel & Pie House, Leytonstone. Hak told the Dutch crew that his great grandfather, a schuyt captain, sent his youngest son to London to learn the eel pie business in the 1890s. After he met and married the daughter of an English eel and pie shop owner, they opened their own place in Bow in 1926. Hak gave the crew a copy of Stuart Freedman’s paean to this hallowed Cockney institution, The Englishman and the Eel (2017); Hak appears on the cover, grasping a live eel. (Note, however, that an Italian immigrant established London’s oldest surviving eel and pie shops in 1902.)

Two years after leaving the EU, this sort of fishy connection can help, in a small way, to conserve a sense of Britain’s Europeanness. Britain’s eels belong to a wider European family, biologically and culturally. Our migratory eel also has a resounding message in an age of mass trans-border movements, reminding us that where we call home is not always where we, or our parents, were born.

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This blog is written by Cabot Institute for the Environment member Peter Coates, an Emeritus Professor of Environmental History at the University of Bristol as part of a joint Migration, Mobility and the Environment blog series with Migration, Mobilities Bristol. Some of the material in this post appeared in ‘Protecting Eurofisch: An Environmental History of the European Eel and its Europeanness’ in Greening Europe: Environmental Protection in the Long Twentieth Century – A Handbook (2022). Peter wrote a book on Salmon (2006) in Reaktion’s ‘Animal’ series and is currently writing a squirrel history of the UK.

Migration, mobilities and the ecological context

In this special blog series, Migration Mobilities Bristol (MMB) and the Cabot Institute for the Environment bring together researchers from across the University of Bristol to explore connections between movement and the environment from a multi-disciplinary perspective. Their diverse approaches highlight the importance of developing frames that incorporate both migration and environment, and in so doing benefit our understandings of both. 

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Migration can make you happy. When I see the first swifts arrive in the spring, I stop in my tracks and smile broadly at all and everyone. I have to restrain myself from telling people walking down the street that ‘they’ are back. Swifts are one of the wonders of the world – they make Concorde look clunky, they hurtle down streets in towns screaming wildly at dusk seemingly just for the fun of it, and scientists have calculated that the distance they fly over their lifetime is equivalent to flying to the moon and back seven times!

Dahlia (Bishop of Llandaff). Image credit: Jane Memmott

Migratory species like swifts have two homes and they are generally well regarded in both places. It’s a bit more touch and go whether alien species are welcome or not, and highly context dependent. For example, we deliberately introduce species from all around the world into our gardens without qualm – looking out the window onto my front garden, I’ve got honey bush and pineapple lilies from South Africa, Dahlias from Mexico, a Hebe from New Zealand, devil’s tobacco from Chile and foxgloves from seed collected down the road! In contrast, my local nature reserves are doing their best to remove Rhododendron, Cotoneaster and Himalayan balsam.

Context really is key here. Thus, gardens are grown for colour, relaxation, fruit, vegetables, and art (and I consider gardening as much of an art as a science) and they are highly managed and artificial habitats. In fact, they are increasingly considered as outdoor rooms in the media, and no one worries what countries their botanical furniture is from. In contrast, nature reserves are usually more natural settings where we want to capture natural patterns and processes, so there is an expectation that the species present should be native. And there is good evidence that while most alien species are harmless, some species (approximately 1%) can be very damaging to the environment and the economy.

Honey bush leaves (Melianthus major). Image credit: Jane Memmott

Migration is about mobility, and mobility is a key part of the scientific process. Thus, universities are ecosystems which provide intellectual homes to academics from all over the world. My own department is home to scientists from Africa, Germany, Brazil, Switzerland, Brazil, Italy and China and those are just the people I’ve bumped into over the last few days. COVID has put a bit of a spanner in the works on the mobility front, but mobility is so key to business that academics have quickly found other ways to be mobile. For example, in my own research group, we have been running a large project in a remote part of Nepal entirely by Zoom for the last two years. But, by dint of the internet and some incredible UK staff and amazing project partners in Nepal, we have trained field staff in ten remote villages in the Himalayas to collect diet data for both bees and villagers, using protocols that would have been very new to them. The data is then uploaded by the field staff to the internet and arrives on the computers the other side of the world as if by magic.

Mobility is such a large part of a scientist’s life that when it goes wrong it can feel shocking. I’ve had two encounters with mobility of scientists being blocked, one involving myself, another a visiting scientist. Mine was, I suspect, a straightforward random immigration check, but it did leave me rather shaken. I was travelling to Canada for the first time and got taken out of the queue and then grilled for 30 minutes on the nature of my visit. I was giving a plenary talk at a conference and had fortunately remembered to print out my letter of invitation. Unfortunately, I hadn’t actually read it for six months and so I probably did sound a bit suspicious. They did eventually let me in and it was an excellent trip thereafter. The second time was when a restoration ecologist from Latin America, who was visiting my research group for six months, went to Spain with his family for a weekend and upon return his whole family was issued with deportation papers. There is something deeply shocking about seeing the hostile environment process in action, especially when mobility is simply part of normal academic interchange. After some high-level work by an international lawyer this too was fixed. Restoration ecology is much more of a long-term process, but the restoration of mobility was much faster in this instance, if a lot more stressful.

Swift (Apus apus). Image credit: Wikimedia Commons.

Migration and mobility are everyday events in the environment. They can be natural such as the return of swifts each year, or they can be assisted such as the reintroduction programmes for species that have become extinct in the UK. One of the biggest reintroduction success stories is the red kite, a bird that you are almost guaranteed to see now if you drive down the M4 motorway or look out of the train window from Didcot to London. These are big and very beautiful predatory birds – imagine a paprika coloured swallow with a 6ft wingspan! My last few Saturdays have been spent driving from Bristol to a hospital in Hampshire to visit a sick relative and one of the things that has made this less stressful is counting the red kites along the motorway. Last Saturday was a 12-kite day, my highest count yet.

To end, migration, mobility and the environment are inextricably linked. There is both natural and human assisted movement of species in the environment. Species can be both welcome and unwelcome depending on the context. It’s complicated, but it’s the everyday bread and butter of ecologists around the world. With alien plants bringing colour and bizazz to our gardens and swifts bringing happiness as they return to their second homes in the UK, there is a lot to like about migration and mobility in the environment.

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This blog is written by Cabot Institute for the Environment member, Jane Memmott, Professor of Community Ecology in the School of Biological Sciences, University of Bristol. Her research interests include pollination ecology, invasion ecology, biological control and restoration ecology. In each case she considers how ecological networks can be used as a tool to answer environmental questions.

Professor Jane Memmott