The Cabot Institute for the Environment heads to COP30

COP30 attendees from the Cabot Institute for the Environment. Left to right: Filipe Franca, Alice Venn, Laurence Hawker, Karen Tucker.

We interview the four academic experts who will be attending COP30 in Belem, Brazil, from the University of Bristol’s Cabot Institute for the Environment. We ask them what their main focus will be at the COP and what they’re most looking forward to, from running a side event with indigenous partners, to providing free legal advice to developing country delegations…

Dr Karen Tucker (School of Sociology, Politics and International Studies)

What is your area of research?

I research the ways in which Indigenous peoples and their knowledges are included (or not) in environmental policies and related programmes. A particular focus, at the moment, is the ways in which climate mitigation policies impact on Indigenous peoples, and the ways they can better support Indigenous knowledges, economies and rights.

What will be your main focus at COP30?

I will be presenting some work I’ve been developing with Indigenous Mapuche Pehuenche partners and Chilean forest scientists at an official UNFCCC side event. I co-organised the event with my colleague in SPAIS, Katharina Richter, and Indigenous and NGO partners in Brazil, Chile, Colombia, Peru and the UK. As well as this, I plan to attend events on Indigenous knowledge and Indigenous leadership in climate governance, and on the connections between forests, biodiversity and climate governance.

What is the main reason you are attending COP? What are you looking forward to?

As well as an opportunity to learn about and contribute to discussions on climate policy as it relates to my specific areas of expertise, attending COP30 will hopefully allow me to continue developing conversations with partners and potential audiences for my research. This is my second COP, and I’m excited to see how policymakers respond to the symbolism and experience of attending a climate conference in the Amazon!

Karen will be running a side event Carbon markets, forests and Indigenous alternatives in the Blue Zone of COP30 on 13 November 2025. Find out more about the event.

Dr Alice Venn (School of Law)

What is your area of research?

I research legal responses to the climate crisis and I’m interested in how the UN climate regime can respond better to the needs of countries and communities on the frontlines of climate change. I explore human rights and climate justice in this process, thinking about how the decisions taken can be made fairer and more representative of those who are most severely impacted.

What will be your main focus at COP30?

I will be working as a liaison officer with the charity, Legal Response International, who provide free legal advice to developing country delegations and civil society groups participating in the climate negotiations. Their work aims to address the inequality between different countries’ negotiating teams, bolstering the legal capacity of countries facing the most severe climate impacts. For me, this will involve meeting with delegates and assisting the team in researching and drafting advice for the requests that come in.

I will also be following the loss and damage and just transition negotiation streams closely as my research centres around these topics. I’ll then share notes and updates with the charity team to draft a summary of the COP outcomes.

What is the main reason you are attending COP? What are you looking forward to?

I’m really looking forward to attending COP30 as although I’ve been researching international climate law for over a decade now, this will be the first time that I’ve attended a COP in person. Working with LRI offers a fantastic opportunity to put my research expertise into practice in an impactful way. I’m also excited to see how the recent International Court of Justice opinion on climate change will influence the discussions.

Dr Filipe Machado França (School of Biological Sciences)

What is your area of research?

Our research area is ecology and environmental sciences. We study insects (dung beetles, butterflies, moths, and bees) to measure nature health in tropical forests. We also work in close collaboration with multiple stakeholders (e.g. policymakers, park managers, local and traditional communities) to co-develop research and guidelines for conservation strategies and environmental practices and policies.

What will be your main focus at COP30?

I would like to engage on activities and discussions / negotiations involving climate-biodiversity relationships, with a particular focus on National Adaptation Plans and Nationally Determined Contributions for countries of interest (e.g. Brazil, Ghana, Malaysia, and the UK).

What is the main reason you are attending COP? What are you looking forward to?

I have been to COP16 in Cali (November 2024), but only with access to the green zone. I contributed to a workshop, which was an excellent opportunity to build new relationships and understanding other initiatives integrating science to decision-making.

COP30 is being held in the country I was born, the ecosystem I’ve been studying for over 15 years, and in the city where I currently have multiple projects and project partners. I am looking forward to the opportunity of having access to the blue zone for the first time, being able to observe negotiations, and engage with multiple and internation stakeholders that also have interest on integrating science and decision-making in the context of climate change and biodiversity in tropical regions.
I am very thankful for this opportunity. As a Brazilian, it will be an honour to receive the team in Brazil. I also hope I can help with anything others might need during their time there.

Watch Filipe talk more about his Cabot Institute funded research in Amazonia on YouTube. 

Laurence Hawker (School of Geographical Sciences)

What is your area of research?

Making global scale maps of where people are most likely to live in the future (until 2100) for various future scenarios. I am also interested in researching risk of already displaced people from climate hazards.

What will be your main focus at COP30?

Networking with members of Coupled Model Intercomparison Project (CMIP), Integrated Impact Assessment Modeling Consortium (IAMC), IOM and UNHCR. I am also keen to meet with policy makers and hear about their concerns for the future and how future maps of population can be best utilised. I want to participate in events primarily on focussed on cities and displaced people. I am also fascinated to observe issue areas and negotiation streams, especially to learn how the future population maps could possibly help inform climate reparations / people at risk.

What is the main reason you are attending COP? What are you looking forward to?

Talking to people across academia, NGOs and governments so we can shape our future population maps to be most useful to the most people. As we are at the early stages of the project, it is so invaluable to get these insights. I am very thankful for this opportunity, especially for someone like me at the early stage of their career.

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COP30 is taking place between 10 and 21 November 2025.

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This post was created by Amanda Woodman-Hardy, Communications and Engagement Officer at the Cabot Institute for the Environment.

Are you a journalist looking for climate experts for COP30? We’ve got you covered

We’ve got lots of media trained climate change experts at the University of Bristol. 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 press-office@bristol.ac.uk.

Cabot Institute for the Environment at COP30

We will have four academics in attendance at the Blue Zone at COP30 who will be available for media interviews. These are: Dr Alice Venn (climate law, loss and damage, just transition), Dr Filipe França (Amazon rainforest changes, deforestation, biodiversity), Dr Laurence Hawker (population mapping, flooding, climate hazards) and Dr Karen Tucker (indigenous knowledges). We will also have several academics attending virtually: Dr Alix Dietzel, Dr Katharina Richter, Dr Ailish Craig, Dr Ruby Lieber, and Stefan Zylinski.

Read more about our participation at COP on our website at https://bristol.ac.uk/cabot/what-we-do/projects/cop/

Action for Climate Empowerment & Children and Youth

Dr Dan O’Hare – expert in climate anxiety in children and educational psychologist.

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.

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.

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.

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

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.

Dr Katharina Richter – an expert in sufficiency-based, postgrowth climate change mitigation approaches and the environmental justice aspects of global energy transitions. Her regional expertise is in Latin America, focussing on sustainable and equitable development in times of climate crisis, with a particular emphasis on the impacts of critical raw materials extraction on biodiverse, water scarce and/or indigenous territories, and indigenous alternatives to growth-based development such as Buen Vivir. Katarina will be virtually attending COP30.

Dr Josephine Walker – health economic modelling.

Climate science / Adaptation and resilience / Mitigation

Dr Laurence Hawker – expert on refugees, flooding, population mapping, displaced people, hazards. Laurence will be at COP30 between 17 and 21 November 2025.

Dr Katharina Richter – an expert in sufficiency-based, postgrowth climate change mitigation approaches and the environmental justice aspects of global energy transitions. Her regional expertise is in Latin America, focussing on sustainable and equitable development in times of climate crisis, with a particular emphasis on the impacts of critical raw materials extraction on biodiverse, water scarce and/or indigenous territories, and indigenous alternatives to growth-based development such as Buen Vivir. Katarina will be virtually attending COP30.

Dr Ailish Craig – expert in improving climate services and climate adaptation across Southern Africa. Ailish will be attending COP30 virtually.

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.

Professor Lizzie Kendon – Lizzie is a Scientific Manager and Met Office Science Fellow at the Met Office and University of Bristol. She is an expert in using climate models to understand future changes in high impact weather events.

Professor Daniela Schmidt – expert in the causes and effects of climate change on marine systems. Daniela 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.

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.

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.

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.

Professor Paul Bates CBE – expert in the science of flooding, risk and reducing threats to life and economic losses worldwide.

Dr Matt Palmer – expert in sea level and ocean heat content at the Met Office Hadley Centre and University of Bristol.

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.

Dr Ryerson Christie – expert in human security, peacebuilding, and natural disasters.

Dr Emily Vosper – hurricane and climate science expert.

Climate techonology

Dr Ce Zhang – expert in environmental data science including Machine Learning and Artificial Intelligence (AI), Geospatial Data Mining and Modelling, Landscape Pattern and Process Modelling, Remotely Sensed Image Analysis and their Applications.

Climate change and health

Dr Dan O’Hare – expert in climate anxiety and educational psychologist.

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.

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.

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.

Dr Adrian Flint – expert in poverty, sustainable development, disease and political economy.

Dr Josephine Walker – health economic modelling.

Just transition

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 attending COP30 virtually.

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.

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 COP30 between 10 to 15 November 2025.

Dr Katharina Richter – an expert in sufficiency-based, postgrowth climate change mitigation approaches and the environmental justice aspects of global energy transitions. Her regional expertise is in Latin America, focussing on sustainable and equitable development in times of climate crisis, with a particular emphasis on the impacts of critical raw materials extraction on biodiverse, water scarce and/or indigenous territories, and indigenous alternatives to growth-based development such as Buen Vivir. Katarina will be virtually attending COP30.

Land Use / Forests / Nature / Food

Dr Filipe França – expert on changes in tropical Amazonia forests including biodiversity, logging, land use etc. Filipe will be in the Blue Zone of COP30 from 10 to 15 November 2025.

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.

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.

Local Communities and Indigenous Peoples

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.

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 COP30.

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 COP30 between 10 to 15 November 2025.

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

Net Zero / Energy / Renewables

Dr Sam Williamson – sustainable and equitable energy systems.

Dr Caitlin Robinson – expert on energy poverty and energy justice and also in mapping ambient vulnerabilities in UK cities.

Professor Charl Faul – expert in novel functional materials for sustainable energy applications e.g. in CO2 capture and conversion and energy storage devices.

Oceans

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.

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

Pollution

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.

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

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

Dr Jagannath Biswakarma – expert in water quality, pollution and treatment. Water contamination.

Cities

Dr Ges Rosenberg – investigates how ‘systems’ approaches (‘systems thinking’ and ‘systems engineering’) can be applied to structure socio-technical problems, and to design and analyse a wide range of engineering solutions and policy interventions, with specific application to infrastructure and city futures.
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This blog was written by Amanda Woodman-Hardy, Communications and Engagement Officer at the Cabot Institute for the Environment.

Warm Penguins: Reflections on the latest Antarctic Treaty Consultative Meeting in Milan

Jordane Liebeaux at the Antarctic Treaty Consultative Meeting.

For two weeks, I was able to take part in the Antarctic Treaty Consultative Meeting (or ATCM), which is the yearly negotiations on Antarctic matters under the Antarctic Treaty, as part of my PhD research in Sustainable Futures on Antarctic environmental governance at the University of Bristol. This year, the negotiations took place from June 23rd to July 3rd in Milan, Italy.

The Antarctic region is legally defined as the lands and waters south of the 60° S latitude. Antarctica is a primarily ice-covered continent surrounded by the Southern Ocean. It is one of the four internationally recognised global commons but, unlike other global commons, such as the high seas, the Antarctic is not governed by the United Nations. Since the adoption of the Antarctic Treaty in 1959, it has been governed by a group of States. This Treaty suspended all territorial claims made, including by the United Kingdom, and made peace and science the foundational pillars of the system. Since then, there have been additional treaties to address specific issues, such as sealing (Convention on the Conservation of Antarctic Seals, 1972) and marine management (Convention on the Conservation of Antarctic Marine Living Resources, 1980). In particular, an Environmental Protocol was adopted in 1991 which prohibited any mineral exploitation and created a Committee on Environmental Protection (CEP), which meets in parallel to the ATCM, during the first week of the negotiations. Its report is then adopted by the ATCM during the second week, and all reports are publicly available on the Secretariat of the Antarctic Treaty’s website.

Only 29 States have decision-making powers at ATCMs, while 29 other States can take part in discussions but do not have decision-making powers in this consensus-based system. However, there are also non-governmental organisations. The Scientific Committee on Antarctic Research (SCAR) is a major Antarctic stakeholder with observer status as it coordinates and promotes Antarctic science, and there are also international groups like the International Union for the Conservation of Nature (IUCN) and the World Meteorological Organisation (WMO). My participation was enabled by the Antarctic and Southern Ocean Coalition (ASOC) as a visiting researcher. As the meetings are held behind closed doors, participation is only possible within one of the delegations, and ASOC has a tradition of hosting academics, which supports both Antarctic research and, to some extent, the transparency of the Antarctic system. Founded in 1978, ASOC is at the forefront of environmental advocacy both at ATCMs and outside the meetings, including member organisations such as WWF, Greenpeace, and the Pew Charitable Trusts.

For my research, I was interested in the discussions of the CEP which I followed during the first week. The agenda items I was particularly looking forward to were the designation of new protected areas and the designation of Emperor Penguins as a Specially Protected Species, because both already faced opposition in past years. And this time was no exception. When Germany proposed a new protected area, a Party opposed, and consensus was not reached. Similarly, when the designation of Emperor Penguins as a Specially Protected Species, especially in the context of declining sea-ice, was raised by the United Kingdom, two Parties opposed the proposition, primarily based on a lack of scientific information to justify such a designation. Both were disappointing outcomes, and it is preoccupying to see these issues reoccurring each year.

In addition to these items, some other discussions caught my attention. For instance, the role of SCAR as an objective scientific body providing the research that should guide evidence-based polices at the ATCM was challenged in particular by the Russian Federation. To me, this is particularly concerning as it is urgent to better protect Antarctica: while SCAR does focus primarily on Western science, time is running out. Attempts at downplaying scientific findings and doubting the quality of the evidence presented postpone vital decisions on Antarctic protection and a strong implementation of the precautionary principle is still lacking.

Furthermore, the Antarctic is far from being a remote and isolated continent. All international dynamics are reflected in the negotiations, even though the tone was always polite. A Party’s opposition to many environmental protection measures can be understood as a way to assert presence in the consensus-based Antarctic system. In addition, Canada and Belarus both applied for full membership in the system with decision-making powers – Canada for the fourth time. Canada’s application was opposed by two Parties despite a majority of States recognising its scientific contributions, and Belarus’ application was opposed by Ukraine with a strong support from many States. In general, it is concerning that geopolitical considerations take precedence over environmental protection even in a part of the world where territorial claims are suspended and military activity prohibited.

I also learned that, as we passed 1.5° of warming, the consequences will be severe for the Antarctic ice sheet. This will lead, for instance, to sea-level rise of several meters in the coming decades and centuries, among other dramatic impacts. Antarctica will therefore become very different, and it becomes crucial to imagine how we can research and live with a disappearing and changing continent. Hence the importance of social sciences and humanities, in addition to natural sciences, to critically reflect on Antarctic governance, its future, and human-environment relationships amid extinction.

However, it is important to remember that the treaty still holds and that it is, in these complicated times, already a small success. Keeping spaces for dialogue, even when States all have different agendas and priorities, leaves the door open for cooperation and communication, bearing in mind that the system already withstood the Cold War, the Falkland War, and the invasion of Ukraine, among other regional and international crises.

Discussions will continue intersessionally between States, for instance to find a compromise on the German protected area. The next ATCM will take place in May 2026 at Hiroshima, Japan, chosen for its strong connection to peace and denuclearisation. Let’s hope that new environmental measures will finally be agreed to protect Antarctica and transform human engagement in a very rapidly changing region.

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This blog is written by Jordane Liebeaux, a PhD student in Sustainable Futures at the University of Bristol.

Jordane Liebeaux

Horseflies and wasps and jellyfish – how to stay safe from stings and bites this summer

Tick on yellow flower
Tick on a yellow flower by Erik Karits (Pexels)

Despite the glorious arrival of summer, there’s definitely a sting in the season’s tail – quite literally. Even in the UK, it’s not just sunburn we need to watch out for. From nettles to jellyfish, summer brings a full cast of prickly, buzzing, biting villains.My own back patio is armed with an arsenal of citronella candles and incense sticks to fend them off – not just a lifestyle choice, but a survival strategy for someone as jumpy as me around insects.

Let’s break down the main culprits.

Plant-based stings: nettles

First up, the humble but mighty common nettle, which thrives in hedgerows and gardens, often reaching impressive heights of up to two metres by midsummer. Their sting comes from tiny hairs called trichomes, which inject histamine and other irritants into the skin as a form of defence.

Histamine causes the classic signs of inflammation: redness, swelling, heat and pain – all of which are evident in the raised, red rash known as urticaria (or hives). Unsurprisingly, the Latin name for the nettle family is urtica, meaning “to sting.”

And what about that old remedy of rubbing a dock leaf on the sting? Honestly, good luck identifying one among the 200-plus species. While the sap might offer a mild soothing effect, there’s no strong evidence of an active compound that reduces symptoms.

If it works for you, great, but calamine lotion or over-the-counter antihistamines are far more reliable. And use some form of protection in the first place – if you’re clearing them from your garden, or foraging to make nettle pesto, wear gloves and proceed carefully.

Insects: bees, wasps and horseflies

As temperatures rise, so do the number of stinging insects like bees and wasps, not to mention the dreaded horseflies. While most don’t sting unless provoked (a mantra I repeat to myself regularly), when they do, it can be unpleasant.

Most stings cause local irritation – simple pain relief and antihistamines usually do the trick here. But sometimes, either the original sting or subsequent scratching can cause infections.

Cellulitis is a deeper skin infection that can spread quickly if untreated. While milder cases may clear up with oral antibiotics, some infections can be serious – even life threatening – and require hospital care.

If a sting site or the surrounding skin becomes red, warm, painful or swollen, seek urgent medical advice. And if you feel unwell with symptoms like fevers, chills or a racing heart, treat it as an emergency.

Insect stings can also trigger anaphylaxis, a life-threatening allergic reaction. In the UK, stings account for around ten deaths per year: a small, but very sobering figure. Always take anaphylactic symptoms like facial swelling, difficulty breathing or dizziness seriously – and call 999 immediately.

Ticks: small bites, big risks

Tick bites are also more common in summer, thanks to more exposed skin and time spent in tall grass or woodlands. Ticks are tiny – often smaller than a poppy seed – and can be easily missed until they become engorged with blood.

They’re usually harmless, but some ticks carry diseases like Lyme disease, a bacterial infection that can cause fatigue, joint pain and, if untreated, serious complications affecting the nervous system or heart.

Ticks can also spread tick-borne encephalitis, a viral infection that can lead to inflammation of the brain, though it’s very rare in the UK. Watch out for the telltale bullseye rash and flu-like symptoms after a bite – and seek urgent medical advice if they appear.

To remove a tick, use fine-tipped tweezers, gripping as close to the skin as possible and pulling steadily. Don’t twist. You want the whole tick out, legs and all. And don’t squeeze its body, as this can force potentially infected fluids into your bloodstream, raising the risk of conditions like Lyme disease, among others.

Marine stings: jellyfish and friends

And finally, the unexpected seaside sting. Coastal waters can play host to a range of jellyfish, from the mildly irritating to the impressively painful.

Most UK species cause minor rashes, but be wary of the lion’s mane and the occasional (though rare) portuguese men o’war – not technically a jellyfish, but still best avoided.

Even jellyfish washed up on shore can sting, sometimes for days. If stung, rinse the area with seawater (not fresh water), or soak in warm water. Avoid rubbing or using urine – yes, that scene in Friends is not medically sound. Peeing on a jellyfish sting can make things worse by triggering more venom release from stuck tentacles.

If tentacles are still stuck to the skin, use tweezers or the edge of a credit card to remove them gently. Don’t use your bare hand – you could end up stinging that too.

And like insect stings, jellyfish can rarely trigger anaphylactic shock. If someone shows symptoms, don’t hesitate to seek emergency help.

From the garden to the seaside, summer has plenty of sting — but being prepared can make all the difference. Whether it’s nettles, bees or ticks, the best approach is prevention (think gloves, repellent and awareness), followed by prompt treatment if needed.

Use calamine or antihistamines for rashes, and tweezers for tick or jellyfish tentacle removal. Keep a close eye out for signs of infection or allergic reaction and always seek medical advice if something doesn’t feel right.The Conversation

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This blog is written by Dan Baumgardt, Senior Lecturer, School of Physiology, Pharmacology and Neuroscience, University of Bristol.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

African penguins could be extinct by 2035 – how to save them

African penguin on a beach
African penguin. Photo by Taryn Elliott via Pexels.

In October 2024, the African penguin became the first penguin species in the world to be listed as critically endangered by the International Union for the Conservation of Nature.

This is a sad record for Africa’s only penguin, and means it is now just one step away from extinction.

How did this happen? African penguins (Spheniscus demersus) are found only in Namibia and South Africa. Their numbers have been declining since the 1800s. At that time, they were burnt in ships’ boilers, their eggs were harvested and consumed as a delicacy, and their nests were destroyed by guano-harvesters seeking a rich source of fertiliser.

Such activities are fortunately no longer allowed. African penguins have been protected under South Africa’s Sea Birds and Seals Protection Act since 1973 (and more recently under the Marine Threatened or Protected Species Regulations since 2017).

These laws and regulations ban the capture of penguins or their eggs, and any intentional harm done to them. Fertilisers no longer use guano (penguin excrement). After egg and guano harvesting stopped, the lack of prey (small fish like sardines and anchovies) became the main issue for penguins from the early 2000s.

The impacts of climate change on the distribution and abundance of their food, and competition with industrial fisheries, have contributed to a 70% reduction in this penguin’s population between 2000 and 2024.

We are a group of scientists from universities and non-governmental organisations that have, for years, focused on solutions to save the African penguin. Today, unless the South African government takes urgent steps to protect the African penguin, it will likely become extinct in the wild by 2035. At present there are fewer than 20,000 birds left in the wild.

Penguins are like the canaries in the coal mine. They are disappearing because the ecosystem they rely on, together with many other species, including fish targeted by commercial fisheries, is in dire straits. By saving them, we protect their ecosystem and the other species that rely on it.

Penguins are also valuable to the economy, bringing in revenue from tourism.

What’s worked for the penguin so far

The destruction of African penguins’ nesting habitat over the centuries has been partly repaired by setting up artificial nests in penguin colonies. New research has found that these improve the number of penguin eggs that hatch by 16.5% compared to natural surface or bush nests which remain vulnerable to the elements.

Steps to protect the African penguins’ food supply also worked. One step was the experimental “no-take zones”, where the South African government prohibited fishing around the penguins’ breeding areas between 2008 and 2019.

The government closed commercial fishing of sardines and anchovies in a 20km radius around Robben Island on the west coast and St Croix Island in Algoa Bay for three years. During this time, commercial fishing around the neighbouring penguin colonies of Dassen Island and Bird Island was still permitted. The closure was alternated every three years until 2019 to see if it affected the penguin populations.

The results were positive. Penguins were able to catch fish with less effort and their chicks’ health and survival rates improved. The population increased by about 1% – a small increase, but very important, considering they were already endangered.

In parallel, the African Penguin Biodiversity Management Plan was published in 2013. The plan focused on managing predators, such as Cape fur seals and kelp gulls, and rescuing abandoned eggs and chicks. Thousands of individual penguins were saved and released into the wild over the years.

What has gone wrong for the penguin

Despite these efforts, the African penguin population fell faster from the mid-2010s. This was mostly due to the sudden collapse of the colony at St Croix Island, then the world’s largest African penguin colony.

This collapse coincided with the establishment of ship-to-ship bunkering activities (refuelling ships at sea rather than in ports) in Algoa Bay in 2016. While the ships were refuelling, four oil spills occurred.

Ship-to-ship bunkering also increased underwater noise pollution due to a ten-fold increase of maritime traffic in the bay.

Our previous research has revealed that African penguins are highly sensitive to underwater noise. Noise from ships or drilling equipment chases penguins away from their feeding grounds.

This also uses up the African penguins’ energy, often at a time when they have none to spare. Penguins need energy reserves before starting their annual moult, when they stay ashore for three weeks without eating to replace all their feathers. If they don’t find enough food before or after that stressful period, they die.

Can the African penguin be saved?

The experimental use of no-take zones in penguin breeding areas ended in 2019. A panel of international experts was then appointed by the South African government to review the experiment and suggest a way forward.

The panel said no-take zones should be put in place around all colonies. They recommended ways to balance the benefit to penguins against the cost to fisheries.

But the government departed from the panel’s recommendations and put in place fishing closures aimed at minimising economic losses to fisheries, and not conserving penguins. For example, they closed down fishing in some areas where penguins don’t hunt for fish.

In March 2024, the non-profit organisation BirdLife South Africa and the South African Foundation for the Conservation of Coastal Birds, represented by the Biodiversity Law Centre, asked the Pretoria high court to review and set aside the Minister of Fisheries, Forestry and Environment’s August 2023 decision on fishing closures around key African penguin breeding colonies. The case is still underway.

Meanwhile, bunkering in Algoa Bay has stopped temporarily after the South African Revenue Service detained five ships in September 2023 on allegations of breaching customs laws.

Subsequently, small increases in the St Croix Island penguin population have been seen for the first time in nearly ten years.

African penguins can bounce back when environmental conditions are good. Government and non-governmental organisations have worked hard to prevent various threats to penguins. But critical work remains to be done to protect their foraging habitat (the ocean around their colonies) from polluting activities.

Penguins also need protection from competition with industrial fisheries for fish supplies.

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This blog is by Lorien Pichegru, Adjunct professor, Nelson Mandela University; Alistair McInnes, Research Associate, Nelson Mandela University; Katrin Ludynia, Honorary Research Associate and Research Manager at SANCCOB, University of Cape Town, and Peter Barham, Professor emeritus, University of Bristol. Dr Lauren Waller of the Endangered Wildlife Trust contributed to this article.The Conversation This article is republished from The Conversation under a Creative Commons license. Read the original article.

Tiny oceanic plankton adapted to warming during the last ice age, but probably won’t survive future climate change – new study

Phytoplankton

Global temperature records are expected to exceed the 1.5 °C threshold for the first time this year. This has happened much sooner than predicted. So can life on the planet adapt quickly enough?

In our new research, published today in Nature, we explored the ability of tiny marine organisms called plankton to adapt to global warming. Our conclusion: some plankton are less able to adapt now than they were in the past.

Plankton live in the top few metres of ocean. These algae (phytoplankton) and animals (zooplankton) are transported by ocean currents as they do not actively swim.

Climate change is increasing the frequency of heatwaves in the sea. But predicting the future effects of climate change is difficult because some projections depend on ocean physics and chemistry, while others consider the effects on ecosystems and their services.

Some data suggest that current climate change have already altered the marine plankton dramatically. Models project a shift of plankton towards both poles (where ocean temperatures are cooler), and losses to zooplankton in the tropics but might not predict the patterns we see in data. Satellite data for plankton biomass are still too short term to determine trends through time.

To overcome these problems, we have compared how plankton responded to past environmental change and modelled how they could respond to future climate changes. As the scientist Charles Lyell said, “the past is the key to the present”.

We explored one of the best fossil records from a group of marine plankton with hard shells called Foraminifera. This comprehensive database of current and past distributions, compiled by researchers at the University of Bremen, has been collected by hundreds of scientists from the seafloor across the globe since the 1960s. We compared data from the last ice age, around 21,000 years ago, and modern records to see what happened when the world has previously warmed.

We used computational models, which combine climate trends with traits of marine plankton and their effect on marine plankton, to simulate the oceanic ecosystems from the last ice age to the pre-industrial age. Comparing the model with the data from the fossil record is giving us support that the model simulated the rules determining plankton growth and distribution.

We found that some subtropical and tropical species’ optimum temperature for peak growth and reproduction could deal with seawater warming in the past, supported by both fossil data and model. Colder water species of plankton managed to drift to flourish under more favourable water temperatures.

Our analysis shows that Foraminifera could handle the natural climate change, even without the need to adapt via evolution. But could they deal with the current warming and future changes in ocean conditions, such as temperature?

Future of the food chain

We used this model to predict the future under four different degrees of warming from 1.5 to 4 °C. Unfortunately, this type of plankton’s ability to deal with climate change is much more limited than it was during past warming. Our study highlights the difference between faster human-induced and slower-paced geological warming for marine plankton. Current climate change is too rapid and is reducing food supply due to ocean stratification, both making plankton difficult to adapt to this time.

Phytoplankton produce around 50% of the world’s oxygen. So every second breath we take comes from marine algae, while the rest comes from plants on land. Some plankton eat other plankton. That in turn gets eaten by fish and then marine mammals, so energy transfers further up the food chain. As it photosynthesises, phytoplankton is also a natural carbon fixation machine, storing 45 times more carbon than the atmosphere.

Around the world, many people depend heavily on food from the ocean as their primary protein sources. When climate change threatens marine plankton, this has huge knock-on effects throughout the rest of the marine food web. Plankton-eating marine mammals like whales won’t have enough food to prey on and there’ll be fewer fish to eat for predators (and people). Reducing warming magnitude and slowing down the warming rate are necessary to protect ocean health.

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This blog is written by Rui Ying, Postdoctoral Researcher, Marine Ecology, and Daniela Schmidt, Professor in Palaebiology, University of Bristol. This article is republished from The Conversation under a Creative Commons license. Read the original article.

Rui Ying
Rui Ying
Daniela Schmidt
Daniela Schmidt

Fresh reflection on COP 16 of the Convention on Biological Diversity

Margherita Pieraccini and Naomi Millner at COP16. Sat down and holding a block representing the SDGs,
Margherita Pieraccini and Naomi Millner at COP16.

As 2024 is drawing to a close, Conferences of the Parties (COPs) of three major Multilateral Environmental Agreements are happening in close succession: COP 16 of the Convention on Biological Diversity (CBD) was held between end of October and the beginning of November, COP 29 of the UN Convention on Climate Change (UNFCCC) is happening in mid-November, and COP 16 of the UN Convention to Combat Desertification will take place in early December.

Although exploring the synergies between these three COPs is of great importance and their close temporal proximity this year facilitates such discussion, I will focus solely on the CBD COP 16 as I had the opportunity to attend it in person as a University of Bristol academic observer.

CBD COP 16, held in Cali, Colombia started on the 21st of October and was due to end on the 1st of November. Negotiations overrun until the morning of the 2nd of November but they were suspended as the quorum was lost, leaving discussions on some key issues such as the strategy for resource mobilization to be resumed at a later date.

As biodiversity COPs are held biannually, COP 16 was the first COP since the adoption of the Kunming-Montreal Global Biodiversity Framework (GBF) at COP 15 in 2022. No one was expecting the negotiation of another major agreement at COP 16, with the key issue being the implementation of the GBF framework.

An introduction to the GBF

Differently from the Paris Agreement under the UNFCCC, the GBF is not legally binding.  Nevertheless, given that the boundary between binding and non-binding instruments in international environmental law is not always so clear-cut, the GBF has a central role in directing biodiversity law and policy. The GBF is a largely aspirational goal and target-oriented instrument. It contains four Goals to ‘live in harmony with nature’ by 2050 and 23 global Targets for 2030, split into three categories, namely ‘reducing threats to biodiversity’, ‘meeting people’s needs through sustainable use and benefit-sharing’ and ‘tools and solutions for implementation and mainstreaming’.  The Targets have different degrees of ‘quantifiability’, impacting also on Parties’ strategies and methodologies of implementation.

For example, the well- known ‘30 by 30’ target (Target 3) sets the threshold of 30% of the coverage of protected areas and other effective area-based conservation measures (OECMs) in terrestrial and inland water areas as well as marine and coastal areas to be reached by 2030. In contrast, Target 5, which still falls within the first category of ‘reducing threats to biodiversity’, is framed using a more general language: ‘ensure that the use, harvesting and trade of wild species is sustainable, safe and legal, preventing overexploitation, minimizing impacts on non-target species and ecosystems, and reducing the risk of pathogen spillover, applying the ecosystem approach, while respecting and protecting customary sustainable use by indigenous peoples and local communities.’

There are not only differences between Targets but the wordings of individual Targets themselves is sometimes contradictory, making for complex implementation as conflicting directions are suggested. For example, Target 19 pushes for the marketisation of nature, encouraging the private sector to invest in biodiversity and employing uncritically the language of green bonds and payments for ecosystem services, whilst, at the same, promoting the role of ‘Mother Earth centric action and non-market approaches’. Even if not all targets are rife with internal contradictions, other internal differences may exist, with some objectives expressed in a qualitative rather than a quantitative manner or by reference to concepts that lack unified legal definitions. This makes it more difficult to devise specific indicators, with the consequence that Parties will likely concentrate on the objectives requiring easier interpretative skills. For example, going back to the ‘30 by 30’ Target 3, the quantitative component is followed by references to ‘equitably governed systems’, which could mean very different things to different regulatory actors and there is still much work to be done on the identification of OECMs.

It should be recalled that this is not the first time the CBD employs the language of Targets and Goals. Notably, the CBD Strategic Plan for Biodiversity 2011-2020 included the Aichi Biodiversity Targets structured around 5 strategic goals, though most were not achieved and few partially achieved, as reported in the Global Biodiversity Outlook 5. COP 16’s focus on implementation was therefore crucial to avoid historical failures repeating themselves in 2030.

The spaces and voices of COP 16

COPs are notoriously busy and chaotic events. COP 16 of the CBD did indeed feel busy, with many side events happening simultaneously and in parallel to the formal negotiations of the two Working Groups and plenaries, as well as press conferences and Pavilion events. It was also the largest-ever CBD COP with some 23,000 registered delegates. Yet, the Conference Centre that hosted COP 16 in Cali was very capacious and the horizontal disposition of the spaces facilitated inter-ethnic, inter-generational, inter-disciplinary and of course inter-jurisdictional discussions under a Colombian sky often veiled by clouds.

It was a pleasant surprise to witness the high representation of youth, as well as indigenous peoples and local communities advocating for their rights and the rights of nature, though one may wonder if this was primarily due to the fact that COP 16 was organised in South America where the question of who is indigenous and who is not is not as contested as in other continents (such as Africa) and where youth environmental activism is thriving.

Side events also saw the participation of a plurality of voices, hosting delegates from a myriad of Inter-governmental organisations (IGOs) and Non-Governmental Organisations (NGOs), as well as researchers, Secretariat members and sometimes Parties. Thus, cross-fertilisation of ideas dominated the Conference with the hope that points made in side events by activists, academics, and others could filter through Parties to the negotiation tables. Indeed, many times in side events speakers addressed the audience as if it were an audience entirely made up by Parties’ delegates (seldom the case in practice), encouraging it to report back to the contact groups, which are closed working groups attended by Parties discussing draft texts of decisions.

Human rights as a framing device for different world-makings

The language of human rights pervaded the whole COP 16. This is a recent turn for the CBD, considering that the CBD itself and its instruments pre-GBF do not explicitly refer to human rights. In contrast, the GBF lists among the considerations for the implementation of the Framework a ‘human rights-based approach’. Section C 7(g) states in full that ‘the implementation of the Framework should follow a human rights-based approach, respecting, protecting, promoting and fulfilling human rights. The Framework acknowledges the human right to a clean, healthy and sustainable environment’. There are a few other references to human rights language scattered in the text. For example, in Target 22, reference is made to the ‘full protection of environmental human rights defenders’. The GBF’s explicit inclusion of human rights language and also the acknowledgement of a substantive human right to a clean, healthy and sustainable environment—which cross references the UN General Assembly Resolution of 28 July 2022—has solidified the link between human rights and biodiversity protection. Thus, it is not surprising that delegates at COP 16 used human rights language extensively.

In this context, it was interesting to observe that different groups internalised and strategically deployed human rights language to advance different, sometimes, but not always complementary, world-makings. Youth representatives referred to human rights as a tool for achieving inter-generational equity in biodiversity conservation; many indigenous peoples’ representatives employed human rights language to advance substantive claims such as rights to land and resources as well as procedural ones such as participatory rights in conservation decision-making; women representatives employed human rights language to address gender inequalities in conservation; some UN representatives strongly supported a human rights-based approach to area-based conservation as a means to avoid the tragedies brought about by ‘fortress conservation’; others used human rights language to reiterate key objectives of existing international law instruments.

The concept of human rights returned over and over in COP discussions intersecting with other reflections that unwrap the many lines around which biodiversity is framed and practiced by different communities and actors.

Outcomes and beyond

As mentioned above, COP 16 was suspended leaving for a later date, decisions on some critical issues, such as finance mechanisms and monitoring mechanism to measure Parties’ progress in achieving GBF Targets and Goals. Considering the slow implementation of the GBF- only 44 Parties have submitted revised National Biodiversity Strategies and Action Plans (NBSAPs), which are the main national implementation tools under Article 6 of the CBD- it is disappointing that decisions on budget and monitoring mechanisms have been left pending. However, there were also many achievements at COP 16, including:

  • the launch of the ‘Cali fund’ to operationalise the sharing of benefits from uses of digital sequence information (DSI);
  • decisions on Article 8(j), focused on traditional knowledge, innovations and practices of indigenous and local communities, including the adoption of a new Programme of Work on Article 8(j) and the establishment of a new permanent subsidiary body on Article 8(j);
  • a number of sectoral decisions, including one on the mechanism for identifying ecologically or biologically significant marine areas (EBSAs), which had been the subject of legal and political discussion for eight years.

The decisions related to Article 8(j) stand out considering the central role indigenous peoples and local communities play in the protection of biodiversity and the importance of including different epistemologies in biodiversity decision-making. During COP itself, there were arguments in favour and against the creation of such subsidiary body. Concerns revolved around questions such as ‘Why fixating on only one article of the CBD? Why a subsidiary body on this specific article and not others?’, ‘Would the subsidiary body silo indigenous peoples and local communities concerns?’, ‘Should indigenous peoples and local communities still be clustered together?’ Many counter-arguments were raised promoting the establishment of the subsidiary body as a way to legitimise and render more visible indigenous peoples and local communities’ practices turning these actors as policy makers instead of policy takers included in NBSAPs. The new subsidiary body’s modus operandi will be developed over the next two years, and it will be interesting to follow such development.

Outcomes are important, and in a goal and target-oriented environmental law world such as the one the CBD governance infrastructure presents, it is natural and logical to focus on what is achieved and what is not. However, the success of COP 16, like all COPs, should not solely be determined by its outcomes. It is essential to remember the spaces and the conversations that unfolded in between, the sharing of knowledge by a global community coming together for a few days from very different paths of life and with different agendas, a multitude unified by the shared concern of biodiversity loss, which continues at unprecedented rates and deserves everyone attention in COPs and beyond.

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This blog is written by Cabot Institute for the Environment member, Professor Margherita Pieraccini, Professor of Law at the University of Bristol Law School.

Margherita Pieraccini
Margherita Pieraccini

How fly fishing strengthens our connection with wildlife and fosters conservation efforts

Whether it’s to reset our mental health or simply to take time out from the hurly-burly of work and urban life, many of us head for oceans and rivers to enjoy their restorative capacities.

Encountering wild animals in these blue spaces contributes to the beneficial effects of being in nature and forms the basis of tourist economies the world over.

Yet, how does our presence affect the creatures that call blue spaces home, and how do encounters with wild species change our relationships with natural environments?

River and stones with green trees and shade
The River Lyd, Devon. Avi Shankar

For nearly a decade, we have been researching human interactions with wild trout and salmon in the context of fly fishing. We spent months immersed in river environments both in the UK (the Lyd and Tamar in Devon, and the Usk and Wye in Wales) and North America (the rivers of the Gaspe region, Quebec and Lewisburg, Pennsylvania). We went fishing, observed and interviewed fly fishers, and learned as much as we could about fish behaviour.

In our recent paper, we explain how human interactions with fish can result in three kinds of interspecies encounters that strengthen people’s connections with wildlife and natural environments.

Separated encounters

Most often, wild animals remain indifferent to humans, driven as they are by natural motivations to feed and breed, within environmental habitats that humans do not fully understand.

For instance, Duane, a novice fly fisher we interviewed in Pennsylvania, didn’t know that trout eat aquatic insects: “I didn’t know squat … flies actually come out of the water?”

This lack of understanding of other species often ensures that wild animals remain undisturbed by human presence. Yet the elusiveness of creatures such as trout and salmon can also motivate people to find out more about them.

Slippery encounters

To improve their chances of catching fish, fly fishers learn about fish behaviour, river environments and the life cycles of the insects that fish feed on.

Equipped with this knowledge, fly fishers become better able to locate trout and salmon, and to select and cast a near weightless imitation “fly” designed to mimic a fish’s insect food.

Learning and honing these skills is a lifelong project during which fly fishers become savvy hunters with heightened abilities to sense what is going on in the water. Equally, fish learn too, becoming shy and ready to slip away from human contact.

Sticky encounters

On the rare occasions that fish are hooked, humans and fish enter what we call a “sticky encounter”. The mixed emotions of catching a wild salmon are captured in Annetta’s field notes:

I look down at this beautiful, majestic being. The fish is a fresh, healthy, silver, bright female … I look at her, she looks back at me … She wrangles free. She’s on a mission to spawn in her home river. I stand up but I’m weak in the knees. Full of pride, humility, and guilt.

Over time, these intense experiences of eye-to-eye contact can inspire fly fishers to consider the welfare of fish.

A wild Usk brown trout in a net
Netted: a wild Usk brown trout – most fly fishers now carefully return their catch back into the river. Avi Shankar

Fly fishers now release the majority of the fish they catch. Moreover, one fly fisher we interviewed explained that he has entirely removed the hooks from his flies, declaring: “I don’t want to catch that fish. I caught so many in my life. I know what the feeling is like.”

Stewarding blue spaces

It may seem ironic that fly fishers become passionate about conserving fish and river environments by practising what many people consider to be a cruel sport. Yet, fly fishers have first-hand experience of declining fish numbers.

Some of our interviewees spoke of trout and salmon as “canaries in the coal mine” – a warning sign of how river ecosystems are threatened by pollution, overdevelopment and climate change. In response, organisations such as the Wild Trout Trust and the Atlantic Salmon Trust highlight the necessity for conservation.

With wild populations of animals declining globally, the presence of humans in blue spaces deserves scrutiny. Nevertheless, interspecies encounters can change the relationship between people, fish and rivers from one of human gratification to one of reciprocity, stewardship and care.

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This blog is written by Professor Avi Shankar, Professor of Consumer Research at the University of Bristol. It is republished from The Conversation under a Creative Commons license. Read the original article.

Avi Shankar standin in the street
Professor Avi Shankar

Indigenous strategies for community engagement to combat climate change in the Amazon

View of the Tapajós River in the City of Santarém
View of the Tapajós River in the City of Santarém. Credit James Moura.

In the heart of the Amazon Rainforest, a group of young indigenous activists gathered to co-produce strategies for fostering community engagement through audiovisual production to combat climate change. Funded by the Cabot Institute for the Environment and the National Institute of Science and Technology for Amazon Biodiversity Synthesis, the voices of various indigenous peoples found collective strength to develop these strategies in the Lower Tapajós region in the city of Santarém at the Federal University of Western Pará. 

This activity took place during the National Seminar of the Tapajós National Forest, which is celebrating its 50th anniversary. The organization of this workshop with young indigenous people began with Kumaruara indigenous leaders who participated in the Amazon Policy Synthesis Project (SynPAm) funded by the Cabot Institute and Policy Bristol at the University of Bristol. This project aimed to identify conservation strategies and gaps in knowledge production related to the Amazon region’s biodiversity. The project involved over 100 stakeholders (researchers, representatives of Non-Governmental Organizations, decision-makers, community leaders, indigenous and quilombola leaders) who engaged in interviews, focus groups, and participatory workshops. One of the suggestions from these various stakeholders was to develop activities where indigenous peoples would also facilitate knowledge production and mobilization processes. 

Thus, one of the indigenous activists from the Kumaruara people proposed the development of a participatory workshop to create community engagement strategies through audiovisual production to the Kumaruara Territory Indigenous Council (@povokumaruara). The Indigenous Council collectively deliberated that they could co-facilitate the development of the workshop with the presence of some young indigenous leaders from different territories (see photo below). 

Indigenous workshop facilitators
Indigenous workshop facilitators. Credit: James Moura.

This activity was the only one co-facilitated by indigenous leaders at the National Seminar. The workshop was conducted collaboratively. The indigenous leaders began with a moment of connection and respect for the sacred spirituality present in the Lower Tapajós territory. With the blessings of the sacred beings, we proceeded to discuss how climate change has been affecting the different territories of the participants. Most of the workshop participants were indigenous people from other ethnic groups, with a small number of non-indigenous participants. A consensus among all present was that climate change is affecting different regions of the Amazon. They commented on how the regions are now drier, hotter, and with fewer fish in the rivers. There is also a greater presence of irregular fires in the region. They pointed out that there is a strong presence of agribusiness, mining, and illegal logging. These factors contribute to the worsening scenario related to climate change. 

one of the conversation circle moments during the workshop
One of the conversation circle moments during the workshop. Credit: James Moura.

After this collective sharing moment, it was evaluated how we could produce strategies to promote community engagement to combat climate change. The participants identified that the collective production of audiovisual content could be an important strategy for community mobilization, denouncing human degradation actions in the territories, and raising awareness to fight climate change. The indigenous leaders commented that this struggle is collective. It requires the engagement of both indigenous and non-indigenous people to bring about a transformation in the ways of life of our society. Excessive consumption, waste production, and economic development models were identified as factors promoting global warming. The Kumuaruara indigenous people provided examples of some audiovisual productions they have developed in the territory (see more of these productions here: https://youtu.be/c0atRyk640k?si=Ksnwek1TblnMoPRe; https://youtu.be/i29UR49wwdo?si=3PW5JVKjn_mpf6F9). 

Participatory activities took place with the organization of two subgroups, including indigenous and non-indigenous people. They reflected on the need to engage people about the impacts of climate change in the territories. A walk was facilitated on the Campus of the Federal University of Western Pará to identify possible causes and impacts of climate change. Participants reflected on the importance of being attentive to small actions that can increase global warming. They also highlighted the need to understand the impacts of large agribusiness, logging, and mining companies operating in the region. They said that the native forest, along with the rivers, has been destroyed by soybean plantations, cattle raising, illegal logging, and mining activities. Thus, the participants created audiovisual productions demonstrating these relationships, from small personal actions to the significant impacts of the logging, mining, and agribusiness sectors in the region. It is necessary to have a critical and attentive view of the entire production chain to identify whether that specific product being sold in the supermarket is not related to environmental degradation and deforestation in different parts of the world.  

video production moment on the UFOPA campus
Video production moment on the UFOPA campus. Credit James Moura

The indigenous peoples of the Amazon, represented by young Kumaruara leaders, call on everyone to combat climate change through daily actions. These actions involve raising awareness of the impacts of climate change on our lives. They highlight the need to compare our contexts over the years and evaluate temperature, vegetation, and climatic events. Furthermore, with this more attentive understanding, we must change habits in a more sustainable and supportive way. Thus, we must understand the production chain of manufactured products and identify if a particular company has been associated with environmental degradation actions. Similarly, we should reduce our need to consume these products and try to consume with less excess. Finally, we must support the actions of indigenous communities worldwide and in the Amazon, which have historically worked on environmental conservation and mitigating climate change. 

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This blog is written by Cabot Institute for the Environment members Dr James Moura, Community psychologist, Senior Research Associate of the Synthesis for Policy in Amazonia in the School of Biological Sciences; Dr Filipe França, Lecturer in the School of Biological Sciences; and Dr James Palmer, School of Geographical Sciences, University of Bristol.

Left to right: James Moura, Filipe Franca and James Palmer
Left to right: James Moura, Filipe Franca and James Palmer

 

How glacier algae are challenging the way we think about evolution

Wirestock Creators/Shutterstock

People often underestimate tiny beings. But microscopic algal cells not only evolved to thrive in one of the most extreme habitats on Earth – glaciers – but are also shaping them.

With a team of scientists from the UK and Canada, we traced the evolution of purple algae back hundreds of millions of years and our findings challenge a key idea about how evolution works. Though small, these algae are having a dramatic effect on the glaciers they live on.

Glaciers are among the planet’s fastest changing ecosystems. During the summer melt season as liquid water forms on glaciers, blooms of purple algae darken the surface of the ice, accelerating the rate of melt. This fascinating adaptation to glaciers requires microscopic algae to control their growth and photosynthesis. This must be balanced with tolerance of extreme ice melt, temperature and light exposure.

Our study, published in New Phytologist, reveals how and when their adaptations to live in these extreme environments first evolved. We sequenced and analysed genome data of the glacier algae Ancylonema nordenskiöldii. Our results show that the purple colour of glacier algae, which acts like a sunscreen, was generated by new genes involved in pigment production.

This pigment, purpurogallin, protects algal cells from damage of ultraviolet (UV) and visible light. It is also linked with tolerance of low temperatures and desiccation, characteristic features of glacial environments. Our genetic analysis suggests that the evolution of this purple pigment was probably vital for several adaptations in glacier algae.

We also identified new genes that helped increase the algae’s tolerance to UV and visible light, important adaptations for living in a bright, exposed environment. Interestingly these were linked to increased light perception as well as improved mechanisms of repair to sun damage. This work reveals how algae are adapted to live on glaciers in the present day.

Next, we wanted to understand when this adaptation evolved in Earth’s deep history.

The evolution of glacier algae

Earth has experienced many fluctuations of colder and warmer climates. Across thousands and sometimes millions of years, global climates have changed slowly between glacial (cold) to interglacial (warm) periods.

One of the most dramatic cold periods was the Cryogenian, dating back to 720-635 million years ago, when Earth was almost entirely covered in snow and ice. So widespread were these glaciations, they are sometimes referred to by scientists as “Snowball Earth”.

Scientists think that these conditions would have been similar to the glaciers and ice sheets we see on Earth today. So we wondered could this period be the force driving the evolution of glacier algae?

After analysing genetic data and fossilised algae, we estimated that glacier algae evolved around 520-455 million years ago. This suggests that the evolution of glacier algae was not linked to the Snowball Earth environments of the Cryogenian.

As the origin of glacier algae is later than the Cryogenian, a more recent glacial period must have been the driver of glacial adaptations in algae. Scientists think there has continuously been glacial environments on Earth up to 60 million years ago.

We did, however, identify that the common ancestor of glacier algae and land plants evolved around the Cryogenian.

In February 2024, our previous analysis demonstrated that this ancient algae was multicellular. The group containing glacier algae lost the ability to create complex multicellular forms, possibly in response to the extreme environmental pressures of the Cryogenian.

Rather than becoming more complex, we have demonstrated that these algae became simple and persevered to the present day. This is an example of evolution by reducing complexity. It also contradicts the well-established “march of progress” hypothesis, the idea that organisms evolve into increasingly complex versions of their ancestors.

Our work showed that this loss of multicellularity was accompanied by a huge loss of genetic diversity. These lost genes were mainly linked to multicellular development. This is a signature of the evolution of their simple morphology from a more complex ancestor.

Over the last 700 million years, these algae have survived by being tiny, insulated from cold and protected from the Sun. These adaptations prepared them for life on glaciers in the present day.

So specialised is this adaptation, that only a handful of algae have evolved to live on glaciers. This is in contrast to the hundreds of algal species living on snow. Despite this, glacier algae have dramatic effects across vast ice fields when liquid water forms on glacier surfaces. In 2016, on the Greenland ice sheet, algal growth led to an additional 4,400–6,000 million tonnes of runoff.

Understanding these algae helps us appreciate their role in shaping fragile ecosystems.

Our study gives insight into the evolutionary journey of glacier algae from the deep past to the present. As we face a changing climate, understanding these microscopic organisms is key to predicting the future of Earth’s icy environments.The Conversation

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This blog is written by Dr Alexander Bowles, Postdoctoral research associate, University of Bristol

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Alexander Bowles
Alexander Bowles