animals – Cabot Institute for the Environment blog

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

Posted on January 20, 2023March 27, 2023 by amanda.woodman-hardy

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.

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

Marc Holderied

Four ways winter heatwaves affect humans and nature

Posted on January 11, 2023April 14, 2023 by janet.crompton

Temperature anomaly in Europe, Jan 1. Much of the continent was 10°C or more (dark red and grey) above the long-term average.
WX Charts, CC BY-NC

An extreme winter heatwave meant countries across Europe experienced a record-breaking New Year’s Day. New daily temperature records for the month of January were set in at least eight countries: Belarus, Czechia, Denmark, Latvia, Liechtenstein, Lithuania, Netherlands and Poland.

In many cases the temperatures were not just breaking the old highs, but smashing them by massive margins. On a typical January day in Warsaw, Poland, temperatures would barely go above freezing, yet the city recently experienced 19℃, breaking the previous January high by 5.1℃.

New January records were set at thousands of individual stations in many other countries such as 25.1℃ at Bilbao airport in Spain, 0.7℃ hotter than the previous record set only last year. Large areas of central and Eastern Europe experienced temperatures 10℃ to 15℃ warmer than average for this time of year – and that has persisted through the week.

When Europe experienced extreme heat in July of last year, more than 20,000 died. Fortunately winter heatwaves are much less deadly, but they can still affect both human society and natural ecosystems in many ways.

1. Less energy is needed

In Europe deaths due to cold weather vastly outweigh those caused by extreme high temperatures – in the UK there are ten times more. Warmer winters will reduce this excess mortality and, with the current cost-of-living crisis, many will have been relieved that a heatwave meant less energy was needed to heat their homes.

Electricity demand is influenced by things like the time of day, the day of the week and socio-economic factors like the COVID pandemic or the war in Ukraine. The weather also makes a difference. For example, in Poland and the Netherlands demand was noticeably lower than average, especially since January 1 was a Sunday. The extent of the heatwave also meant countries could refill some of their winter gas reserves, or large batteries.

Energy consumption in Poland December 28 to January 5. The red line shows the 2022-2023 heatwave period, and the grey lines show available data from 2015-2022.
Hannah Bloomfield / data: transparency.entsoe.eu, Author provided

2. Reduced yields for some crops

Winter warm spells don’t always have such a positive impact though. For instance a lack of snow in the mountains affects agriculture and can reduce crop yield, since snow creates an insulating blanket that prevents frost from penetrating into the soil. This means snow can actually increase soil moisture more than rainfall, thus improving growing conditions later in the season.

The big snow melt in spring time replenishes reservoirs and allows hydroelectricity generation, but unexpected snow melt can lead to flooding. Changes to the timings of these events will require preparation and adaptation to enable a steady supply of water to where we need it.

Warmer temperatures will create longer growing seasons in many regions. This is not always the case though. A recent study showed that for alpine grasslands an earlier growing season (the point when snow has melted entirely) leads to ageing and browning of the grasses in the later part of the summer.

3. The snow economy is in trouble

The heatwave caused ski resorts across the Alps to close in what should be their busiest time of year. In January the slopes would be expected to have a good covering of snow – but instead we saw green grassy fields.

This hits the local economy where many people rely on winter sports tourism. Events such as the Adelboden alpine ski World Cup are relying on artificial snow, which comes with a further environmental cost increasing the carbon footprint of ski resorts and requiring a large water supply. Indeed, the Beijing winter Olympics used the equivalent of daily drinking water for 900 million people to generate the artificial snow it required.

4. Animals out of sync with the climate

We humans are perhaps fortunate, as we are able to adapt. Some ski resorts have already opened mountain bike trails in winter to offer alternative tourism, but wildlife and ecosystems cannot adjust so rapidly.

In the mountains many species, such as ptarmigan and mountain hares, change their colouring for winter to camouflage in the white snow. The timing of this change is determined by length of day – not the temperature or amount of snow. These creatures are at greater risk of being preyed on when it is warmer.

White rabbit, brown background — Mountain hares are dressed for a climate that has changed.
Mark Medcalf / shutterstock

Over the past century heat extremes in Europe have increased in intensity and frequency. Both the general warming and heatwave events have been firmly attributed to humans.

Future projections suggest these trends will continue and heatwaves in both summer and winter will get hotter, last longer, and occur more often. We need to learn to adapt for these changes in all seasons and think about the impacts on everyone – and everything – on our planet.

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This blog is written by Cabot Institute for the Environment members Dr Vikki Thompson, Senior Research Associate in Geographical Sciences, University of Bristol and Dr Hannah Bloomfield, Postdoctoral Researcher in Climate Risk Analytics, University of Bristol. This article is republished from The Conversation under a Creative Commons license. Read the original article.

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

Posted on September 30, 2022April 16, 2023 by janet.crompton

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.

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

Migration, mobilities and the ecological context

Posted on May 10, 2022April 16, 2023 by janet.crompton

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

Electric ecology: we’re discovering how animals and plants use electricity in ingenious ways

Posted on November 15, 2021April 16, 2023 by janet.crompton

When you hear the word “electricity”, thoughts of power lines or household appliances are probably conjured up in your mind. But electricity is not just a modern human phenomenon – it was around long before us and, in fact, long before planet Earth.

“Electricity” simply refers to the interactions between any electrically charged objects, not just human-made ones, and these interactions are commonly found in the natural world among many animals and plants.

At the small scale, these electrical interactions involve negatively charged electrons and/or positively charged protons – opposite charges attract and like charges repel. But each of these tiny particle interactions can add up, and contribute to creating effects which we can see at the much larger ecological scale in the interactions between animals, plants and their environment.

In a lot of cases, what we are seeing in the natural world is static electricity, which is what you experience when you rub a balloon on your hair and it becomes statically charged. The exact same thing can happen to animals.

As animals run, crawl or fly, their body parts rub on objects in their environment – or even just the air – and this charges them up, just like the balloon rubbing on your head. The amount of charge animals can build up this way is surprisingly high, with many different species accumulating charges that when measured as voltages can be in the region of many hundreds or thousands of volts. That’s more than the voltage that comes out of your plug sockets at home.

We wanted to review whether this static electricity helps animals live their lives. The answer is a resounding “yes”.

Because statically charged objects can attract and repel each other, many different kinds of ecological interactions are affected by them.

The static charges on the feet of geckos help them stick to surfaces, so they can wall-run with ease.

Spiders also love a bit of static electricity; not only are their webs electrostatically attracted towards charged flying insects, but they also use electricity to fly. Several species of spider exhibit a behaviour called “ballooning”, where they let out strands of silk that lift them up into the air like a balloon, and carry them away to disperse and find new homes. It turns out that static electricity in the atmosphere, the type that causes thunderstorms in extreme cases, actually helps spiders in their aviation efforts by statically attracting the charged silk strands upwards into the atmosphere.

It is not just animals that take advantage of these invisible electric forces either. Pollen has actually been shown to jump from flower to insect or bird pollinator without any contact between the two. The static charges of insects and hummingbirds are strong enough to pull pollen through the air, even over several centimetres in some cases.

Hummingbird feeding from red flower — Hummingbirds attract pollen thanks to static electric charges.
Jeffrey Eisen / Pexels, CC BY

Many animals can detect electricity too

Because naturally occurring electricity permeates the environment and lives of so many organisms – and has clear ecological value – it seemed likely that some animals may have evolved sensory systems to detect it.

Recent research has discovered that many animal species can indeed detect electricity when it is relevant to their natural ecology. We call this “aerial electroreception”.

Bumblebees and hoverflies can sense the electricity that exists around flowers, and use this information to learn which flowers might have the best nectar stocks. Similarly, part of the “waggle dance”, a series of movements performed by honeybees to communicate to each other where to forage, is also transmitted electrically by the detection of the statically charged bee body shaking around.

It has also now been shown that those flying spiders I mentioned earlier can detect how strong the local atmospheric electrical conditions are, and can then use this information to decide when to attempt take-off.

We are only just beginning to uncover the multiple strands of this newly discovered sense. There are likely hundreds, if not thousands, more species capable of aerial electroreception, and in many more ecological contexts; perhaps a prey animal can detect its approaching predators by the static charge on the predator, or vice versa. There is so much more to be discovered.

Possibly even more important though, is to assess to impact of human activity on this electric ecology.

The magnitude of many human-made electricity sources are comparable, if not greater, than the natural sources of electricity. We might be swamping the electrical senses of key pollinators or interfering with the natural world in other, as yet unknown, ways. While the discovery of this electrical sense is incredibly exciting, it also highlights how little we really know about the ways in which we could be hurting and disturbing the natural world.

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This blog is by Sam England, PhD researcher in Biological Sciences, University of Bristol

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

Sam England

Exploring the Wildfilm Archive in University of Bristol Special Collections

Posted on January 28, 2020March 31, 2023 by janet.crompton

Bristol is widely seen as the ‘Hollywood’ of wildlife film-making and is famously home to the BBC’s Natural History Unit, formerly established in the city in 1957. The University of Bristol Library’s Special Collections has embarked on a 2 year project to preserve and promote the mixed-media ‘Wildfilm’ archive, supported by funding from the Wellcome Trust.

An example draft shooting script for the first episode of ‘The Living Planet’ (1984), working title ‘Planet Earth’, later re-used in the 2006 BBC series! [G. Lever]

I am the Project Archivist working to catalogue and re-package the material, making it available to search online and access in person at the Special Collections reading room. There are treatments, post-production scripts, dubbing cue sheets, filming trip planning, photographs, research and correspondence – documenting a given programme from conception to broadcast – as well as audience research reports, publicity and press packs.

A Radio Times cover from 1962 featuring Peter Scott for the ‘Look’ series [G. Lever]

A substantial part of the collection is audio-visual, including several hundred reels of 16mm film footage. Among the cans are films produced by Survival Anglia, the BBC, and renowned film-makers Niko Tinbergen (1907-1988) and Eric Ashby MBE (1918-2003). The archive also contains sound recordings, radio broadcasts and audio from talks and festivals. In Digi-Beta format there is a selection of the 150 most important wildlife films selected by BBC producer Christopher Parsons (1932-2002) and a VHS library collected by Jeffery Boswall (1931-2012), another BBC producer whose papers are also in the archive.

An example of 16mm film cans in the collection [G. Lever]

As evidence of method and technique there are two of the home-made sound-proof boxes made by Eric Ashby, enabling him to capture intimate footage of badgers and foxes in their natural state of behaviour. For further interpretation there are some unusual supplementary objects such as the penguin flipper, skulls and skin collected during filming in South America for ‘The Private Life of the Jackass Penguin’ (1973).

Eric Ashby’s home-made box for insulating sound made by camera equipment [Helen Lindsay]

A dubbing cue sheet for an episode of the BBC’s ‘The World About Us’ [G. Lever]

It’s an incredibly exciting project to be involved in. I’m working alongside Peter Bassett, a producer with the BBC Natural History Unit who has acted as guardian and advocate for the collection and is a font of knowledge on the history of wildlife film making. Nigel Bryant, Audiovisual Digitisation Officer will join the project for a year to produce lossless digital preservation copies of selected material, enhancing the accessibility of audio-visual media in the collection and protecting the longevity of these fragile, obsolete formats. We’re confident the archive offers significant research value to a variety of disciplines and interests – from the history of media and television to environmental studies, anthropology, history, philosophy and music.

Consistently these films bear witness to changes in the natural world leading us towards today’s climate crisis, educating us about the animal kingdom and the landscape we inhabit, reminding us of our responsibility to protect it.

The artist Jody’s mural of Greta Thunberg on the side of the Tobacco Factory, North Street, Bristol [G. Lever]

The climate activist Greta Thunberg recently guest edited an episode of the Today programme on BBC Radio 4. During a Skype interview with Sir David Attenborough, she said:

“When I was younger, when I was maybe 9-10 years old, the thing that made me open my eyes for what was happening with the environment was films and documentaries about the natural world, and what was going on, so thank you for that, because that was what made me decide to do something about it.”

The archive has its foundations in a project led by another Bristol based organisation, Wildscreen, founded in 1982 by Christopher Parsons. Wildscreen hosts an internationally renowned biennial festival on wildlife film (the 20th anniversary festival will be held later this year, 19-23 October 2020) and supports a variety of conservation organisations. It launched ‘WildFilmHistory: 100 years of wildlife film making’ in 2008, a Heritage Lottery funded project that led to a collection of material which now forms part of the ‘Wildfilm’ archive.

Another compelling aspect of the collection is a series of oral history films made by the WildFilmHistory project, spanning all facets of film-making from producers and cameramen to composers and narrators. The interviews capture both the professional and personal alliance between subject and interviewer, enabling discussion to draw out the working relationships behind the creation of pivotal series such as the BBC’s ‘Look’ (1955-1969) and ITV’s ‘Survival’ (1961-2001).

The content of interviews ranges from anecdotal to technical, covering the logistical challenges of filming in remote places, photographic technique, reliability of equipment, battling physical elements, ingenious ways of tackling technological limitations and reflecting on moments of fortune and failure.

It is a renowned ambition of natural history film-making to capture a rare species or behaviour on camera for the first time; paperwork in the archive documents how this is attempted and achieved, and the role narrative construction may have to play in documentary film.

In a recent speech at the World Economic Forum, Sir David Attenborough said:

“When I made my first television programmes most audiences had never even seen a pangolin – indeed few pangolin had ever seen a TV camera!”

There has been an astonishing level of cultural and technological change since the programme, ‘Zoo Quest for a Dragon’ was broadcast in 1956 on the BBC – then one channel with national coverage only recently extending beyond London and Birmingham. In his published diaries for the Zoo Quest series, ‘Adventures of a Young Naturalist’, Attenborough recollects the obstacles involved in locating species unique to regions of Guyana, Indonesia and Paraguay. Through such programmes viewers gained their first glimpse of far flung parts of the world, now increasingly accessible with the growth of air travel and the tourism industry.

Improvements in technology allow viewers to observe the animal kingdom from new perspectives. The archive spans an era during which television has evolved from black and white to regular colour broadcasting in the late 1960s, and the invention of cinematic IMAX presentation to home based on-demand UHD (Ultra High Definition) 4KTV offered by streaming services today. In the same speech, Attenborough says:

“The audience for that first series, 60 years ago, was restricted to a few million viewers… My next series will go instantly to hundreds of millions of people in almost every country on Earth via Netflix”.

As well as the BBC Natural History Unit, the archive contains material for Survival Anglia, Granada, Partridge Films and the RSPB Film Unit, and international networks like the Australian Broadcasting Corporation and TVNZ.

There is a slim body of literature and theory on the history of wildlife film, but within the archive there is a unique collection of studies and published papers by academics tapping into this potential. Two excellent books are ‘Wildlife Films’ by Derek Bousé (University of Pennsylvania Press, 2000) and ‘BBC Wildlife Documentaries in the Age of Attenborough’ by Jean-Baptiste Gouyon (Palgrave Macmillan, 2019).

Some material relating to Granada’s ‘Zoo Time’ series (1956-1968) [G. Lever]

All this material is being described in a detailed catalogue, capturing key words such as species and filming locations to ensure relevant content can be found by anyone with an interest in the archive. When complete the full catalogue will be launched on the Special Collections webpage in the summer of 2021.

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This blog was written by Georgina Lever, a project archivist from the Wildfilm Special Collections at the University of Bristol. This blog has been reposted with kind permission from the Centre for Environmental Humanities. View the original blog.

The social animals that are inspiring new behaviours for robot swarms

Posted on April 8, 2019April 4, 2023 by janet.crompton

File 20190326 36252 wdqi1n.jpg?ixlib=rb 1.1 — Termite team.
7th Son Studio/Shutterstock

From flocks of birds to fish schools in the sea, or towering termite mounds, many social groups in nature exist together to survive and thrive. This cooperative behaviour can be used by engineers as “bio-inspiration” to solve practical human problems, and by computer scientists studying swarm intelligence.

“Swarm robotics” took off in the early 2000s, an early example being the “s-bot” (short for swarm-bot). This is a fully autonomous robot that can perform basic tasks including navigation and the grasping of objects, and which can self-assemble into chains to cross gaps or pull heavy loads. More recently, “TERMES” robots have been developed as a concept in construction, and the “CoCoRo” project has developed an underwater robot swarm that functions like a school of fish that exchanges information to monitor the environment. So far, we’ve only just begun to explore the vast possibilities that animal collectives and their behaviour can offer as inspiration to robot swarm design.

Swarm behaviour in birds – or robots designed to mimic them?
EyeSeeMicrostock/Shutterstock

Robots that can cooperate in large numbers could achieve things that would be difficult or even impossible for a single entity. Following an earthquake, for example, a swarm of search and rescue robots could quickly explore multiple collapsed buildings looking for signs of life. Threatened by a large wildfire, a swarm of drones could help emergency services track and predict the fire’s spread. Or a swarm of floating robots (“Row-bots”) could nibble away at oceanic garbage patches, powered by plastic-eating bacteria.

A future where floating robots powered by plastic-eating bacteria could tackle ocean waste.
Shutterstock

Bio-inspiration in swarm robotics usually starts with social insects – ants, bees and termites – because colony members are highly related, which favours impressive cooperation. Three further characteristics appeal to researchers: robustness, because individuals can be lost without affecting performance; flexibility, because social insect workers are able to respond to changing work needs; and scalability, because a colony’s decentralised organisation is sustainable with 100 workers or 100,000. These characteristics could be especially useful for doing jobs such as environmental monitoring, which requires coverage of huge, varied and sometimes hazardous areas.

Social learning

Beyond social insects, other species and behavioural phenomena in the animal kingdom offer inspiration to engineers. A growing area of biological research is in animal cultures, where animals engage in social learning to pick up behaviours that they are unlikely to innovate alone. For example, whales and dolphins can have distinctive foraging methods that are passed down through the generations. This includes forms of tool use – dolphins have been observed breaking off marine sponges to protect their beaks as they go rooting around for fish, like a person might put a glove over a hand.

Bottlenose dolphin playing with a sponge. Some have learned to use them to help them catch fish.
Yann Hubert/Shutterstock

Forms of social learning and artificial robotic cultures, perhaps using forms of artificial intelligence, could be very powerful in adapting robots to their environment over time. For example, assistive robots for home care could adapt to human behavioural differences in different communities and countries over time.

Robot (or animal) cultures, however, depend on learning abilities that are costly to develop, requiring a larger brain – or, in the case of robots, a more advanced computer. But the value of the “swarm” approach is to deploy robots that are simple, cheap and disposable. Swarm robotics exploits the reality of emergence (“more is different”) to create social complexity from individual simplicity. A more fundamental form of “learning” about the environment is seen in nature – in sensitive developmental processes – which do not require a big brain.

‘Phenotypic plasticity’

Some animals can change behavioural type, or even develop different forms, shapes or internal functions, within the same species, despite having the same initial “programming”. This is known as “phenotypic plasticity” – where the genes of an organism produce different observable results depending on environmental conditions. Such flexibility can be seen in the social insects, but sometimes even more dramatically in other animals.
Most spiders are decidedly solitary, but in about 20 of 45,000 spider species, individuals live in a shared nest and capture food on a shared web. These social spiders benefit from having a mixture of “personality” types in their group, for example bold and shy.

Social spider (Stegodyphus) spin collective webs in Addo Elephant Park, South Africa.
PicturesofThings/Shutterstock

My research identified a flexibility in behaviour where shy spiders would step into a role vacated by absent bold nestmates. This is necessary because the spider colony needs a balance of bold individuals to encourage collective predation, and shyer ones to focus on nest maintenance and parental care. Robots could be programmed with adjustable risk-taking behaviour, sensitive to group composition, with bolder robots entering into hazardous environments while shyer ones know to hold back. This could be very helpful in mapping a disaster area such as Fukushima, including its most dangerous parts, while avoiding too many robots in the swarm being damaged at once.

The ability to adapt

Cane toads were introduced in Australia in the 1930s as a pest control, and have since become an invasive species themselves. In new areas cane toads are seen to be somewhat social. One reason for their growth in numbers is that they are able to adapt to a wide temperature range, a form of physiological plasticity. Swarms of robots with the capability to switch power consumption mode, depending on environmental conditions such as ambient temperature, could be considerably more durable if we want them to function autonomously for the long term. For example, if we want to send robots off to map Mars then they will need to cope with temperatures that can swing from -150°C at the poles to 20°C at the equator.

Cane toads can adapt to temperature changes.
Radek Ziemniewicz/Shutterstock

In addition to behavioural and physiological plasticity, some organisms show morphological (shape) plasticity. For example, some bacteria change their shape in response to stress, becoming elongated and so more resilient to being “eaten” by other organisms. If swarms of robots can combine together in a modular fashion and (re)assemble into more suitable structures this could be very helpful in unpredictable environments. For example, groups of robots could aggregate together for safety when the weather takes a challenging turn.

Whether it’s the “cultures” developed by animal groups that are reliant on learning abilities, or the more fundamental ability to change “personality”, internal function or shape, swarm robotics still has plenty of mileage left when it comes to drawing inspiration from nature. We might even wish to mix and match behaviours from different species, to create robot “hybrids” of our own. Humanity faces challenges ranging from climate change affecting ocean currents, to a growing need for food production, to space exploration – and swarm robotics can play a decisive part given the right bio-inspiration.

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This blog was written by Cabot Institute member Dr Edmund Hunt, EPSRC Doctoral Prize Fellow, University of Bristol. This article is republished from The Conversation under a Creative Commons license. Read the original article.

Edmund Hunt

Animals in the fraternity of universal nature

Posted on March 31, 2015April 14, 2023 by janet.crompton

Have you read any poems about animal rights lately? Or perhaps attended a talk or exhibition on this or another environmental topic? Andrew Kelly, director of the Bristol Festival of Ideas, has aimed to inspire discussion on controversial issues for the past ten years through public lectures and commissioned art, this year focusing on the theme radical environmentalism. On 26 March Kelly himself gave a lecture entitled “Animals in the fraternity of universal nature,” where he argued that poets and other artists have been drivers of cultural discourse on radical environmental issues, and specifically on animal rights, since the time of the romantic poets. He suggests that Bristol’s exciting cultural line up for 2015 can give us inspiration as a city to improve our relationship with nature in an urban environment.

Kelly’s literary lens on the history of animal rights showed how the romantic poets, and in particular Samuel Taylor Coleridge (who the whole lecture series this year is named after) and William Wordsworth, brought a relationship with animals and philosophy of universal rights for all creatures to a mainstream audience in the 18th century. These poets represented changing times – the growth of industry, the French Revolution, and challenges to the slave trade all changed people’s perceptions of humanity’s relationship with the natural world. In addition, the increasing use of animals as pets or companions, demonstrated that animals had personality, could feel pleasure and pain, and show loyalty.

The lecture struck a difficult balance between inspiration and excitement on the one hand and depression and pessimism on the other. I’d like to believe that art really can make political change – but issues the romantic poets raised in the 1700s are still considered radical today. For example, hunting for sport was decried by the romantic poets as cruel, although at the time hunting was seen as a symbol of courage. It was not until 2004 that hunting (only with dogs) was banned in England under the Hunting Act. Today, public support of this ban stands at 76%. However, other forms of hunting, and wildlife culling, are perfectly legal.

One of the primary animal welfare issues that we face today, and that the romantic poets might never have imagined, is the growth of intensive factory farms for meat, dairy, and egg production. We also face the rapid destruction of rainforest and other habitat for wild animals for production of palm oil and livestock feed, and the rampant poaching of highly endangered rhinos for black market traditional medicines. Kelly feels that the decimation of the natural world that we see today would have greatly saddened the romantics. His pessimism about the future came through as he quoted a vision of the future from H.G. Wells’s The Time Machine, written in 1895:

“I looked about me to see if any traces of animal life remained … But I saw nothing moving, in earth or sky or sea. The green slime on the rocks alone testified that life was not extinct … I fancied I saw some black object flopping about upon this bank, but it became motionless as I looked at it, and I judged that my eye had been deceived, and that the black object was merely a rock.”

Is it possible to make cultural and political change quickly enough to stop the rampant environmental destruction and exploitation of animals that feels inevitable? Can art and discussion convert the human connection with nature into political will? As Kelly described, the romantic poets wrote about cruelty to animals with quills plucked from live geese; today, we debate the badger cull while eating hamburgers from factory farms. After 250 years, will art finally be able to bring radical environmentalism into the mainstream and into policy?

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This blog is written by Cabot Institute member and PhD student Josephine Walker in the School of Biological Sciences.