The US Supreme Court has limited the Environmental Protection Agency’s (EPA) ability to curb power plant emissions, impacting America’s attempts to fight climate change.The Supreme Court ruled that the Clean Air Act does not give the EPA broad authority to regulate greenhouse gas emissions from power plants. The Biden administration plans to combat climate change by cutting the nation’s greenhouse gas emissions in half by the end of the decade and aiming for an emissions-free power sector by 2035. Now, the decision to curb power plant emissions must be taken by Congress itself, or “an agency acting pursuant to a clear delegation from that representative body.”
In other climate news, both Spain and Portugal are suffering the driest climate for at least 1,200 years, according to new research. Azores highs, high-pressure systems off the coast that blocks wet weather fronts in winter, have dramatically increased since 1980, pushing wet weather northwards. This is having severe implications for both food production and tourism. This change has been conclusively linked to increased anthropogenic emissions.
Scientists have warned Members of the European Parliament (MEPs) against watering down EU deforestation laws. Last week, a draft regulation was rewritten to define ‘forest degradation’ as the replacement of primary forests by plantations or other wooded land. As primary forests account for only 3.1m hectares of 159m hectares of overall forest, this definition would severely limit the law’s reach to only 2% of the total forest area. A letter from more than 50 scientists has stated that any exclusion of forest degradation from the law would undermine the EU’s desire for Europe to “become the first climate-neutral continent by 2050.”
Conservation
Bird flu has been confirmed at the UK’s only breeding colony of roseate terns in Northumberland. This “new virulent” form of bird flu is having a devastating impact on a number of wild bird species, with hundreds of seabirds found dead on Coquet Island. There are now calls for the government to develop and implement a national response plan for bird flu in wild birds, including clarity for collecting dead birds and a long-term plan for future threats. This disease is affecting all four species of tern on the island, as well as eider ducks, black-headed gulls and large gulls. The island is also home to nesting puffins but, so far, no puffin deaths have been recorded.
A £4.1m scheme has been revealed to improve wildlife habitats and alleviate flooding alongside roads in Stafford. The Stafford Brooks Project will target 25 locations near local rivers and streams to address the environmental impact of roads. Space will be created for wildflowers, trees and wildlife in areas where habitats have been impacted by activities from previous road building. New wetlands and reed beds are also being designed to help filter polluted run-off from roads, which can significantly impact river health.
Researchers are satellite-tracking whale sharks to explore the factors influencing their behaviour in the coastal waters of the Panamanian Pacific, including migratory and feeding behaviours. Rhincodon typus is vulnerable to population declines due to their slow maturation and they face a number of threats from humans, including entanglement in fishing nets and boat strikes. This study has shown that whale sharks spend more than 77% of their time in areas without any protection, indicating that conservation measures should go beyond the creation of local marine protected areas.
A new study, part-funded by The Mammal Society, has revealed the presence of plastic consumption in small mammals. More than 261 faecal samples were analysed to assess the exposure of seven terrestrial UK mammals to plastics. Four species, the European hedgehog, wood mouse, field vole and brown rat all had plastic polymers detected within their faecal samples. This ingestion was shown to occur across species of differing dietary habits and locations, confirming that plastic consumption is a widespread issue.
New Discoveries
A new giant water lily species has just been discovered, despite being in the archives of the Royal Botanic Gardens, Kew, for 177 years. Now holding the record as the world’s largest water lily, with its leaves growing more than 3m wide, the Victoria boliviana grows in a single water basin in part of the Amazon river system in Bolivia. It was long suspected to be different from the two other known giant species, V. amazonica and V. cruziana, but it was only when Kew grew all three side-by-side under exactly the same conditions that they could clearly see V. boliviana was totally different.
Policy
Singapore strengthened a law on Monday 4th July to stamp out wildlife trafficking, with stiffer penalties for those found guilty. The changes to the Endangered Species (Import and Export) Act include tripling the maximum jail term for individuals from two to six years and increasing the maximum fine from $50,000 (~£29,550) per species to $100,000 (~£59,100) per specimen. Companies involved in the trafficking of endangered species will also face higher fines and prison sentences, according to the Senior Minister of State for National Development, Tan Kiat How.
In the lead up to the 26th UN Climate Change Conference of the Parties (COP26) in November of last year, as well as the months that have followed, we have been writing a series of articles looking at some of the toughest global climate crisis challenges that we are currently facing. This post looks at the intensification of agricultural practices and how this can both be exacerbated by and contribute to climate change.
Farmer applying pre-emergence sprays. Chafer Machinery via Flickr
What is agricultural intensification?
Our global population is increasing year on year and is predicted to hit 10 billion by 2057. Agricultural production has to keep pace with the resource demands of this growing population. There are two main ways this can occur: an increase in the amount of land used for agricultural purposes or an increase in the yield from land already used through improvements or increased use of resources such as technology, fertilisers, labour, pesticides or scientific plant knowledge.
What are the impacts of land-use change?
Habitat destruction is considered one of the main causes of animal extinctions worldwide, and much of this destruction is due to clearing land for agriculture. Intensively managed agricultural land is far less valuable for the environment than natural habitats such as wetlands and forests. Intensively managed farmlands support less diverse and abundant species, sequester less carbon dioxide and suffer from increased water loss and soil erosion. Therefore, the increase in agricultural areas can contribute to climate change and worsen our ability to mitigate its effects.
Agricultural expansion and land clearing are pushed right up to Bwindi Impenetrable National Park boundaries in Uganda. USAID Biodiversity and Forestry via Flickr
What is the impact of increasing yields?
Intensification of agricultural management practices to increase yield includes an increase in the use of chemicals such as fertilisers, herbicides and pesticides, all of which can negatively impact wildlife, soil and nearby water quality. The artificial introduction of nutrients can be detrimental to the environment, particularly if it reaches waterways through run-off, as it can lead to algae blooms that can deplete aquatic oxygen levels.
Herbicides and pesticides have a direct impact on both target and non-target species, potentially disrupting populations and affecting whole ecosystems. Species can also be impacted through trophic poisoning, as the impacts of these chemicals can be heightened through biomagnification, where toxins build up in the food chain in greater and greater concentrations at each trophic level. This often results in the loss of top consumers which can destabilise ecosystems.
Another way to increase yield is by utilising as much of the existing agricultural land as possible. This, however, reduces the areas of non-crop species, such as trees and hedgerows. These areas represent essential diversity in plant species, helping to support a wide variety of fauna by providing food, shelter and breeding areas. Losing these areas reduces the variety and abundance of species that agricultural land can support. Additionally, crops are often grown in monocultures, a field composed of just a single crop species rather than multiple species, further reducing biodiversity. This increases the susceptibility of fields to disease and pest damage, furthering the need for additional chemical intervention.
Agriculture is one of the major sources of greenhouse gases that contribute to climate change. Methane and nitrous oxide, produced from livestock and as an indirect product of fertilisers, are particularly problematic. Increasing production or land area can increase the amount of greenhouse gases released into the atmosphere while reducing the amount of carbon that the land can sequester, enhancing the impact on climate change.
Climate change affects agriculture in return. Changes in precipitation patterns impact crop yields and reduce yield reliability. Higher temperatures, particularly heat waves, can lead to high yield losses, livestock death or sickness, a reduction in workable hours, increases in water supply needs and even damage to equipment. More frequent and higher intensity extreme weather, such as storms, can also impact in a similar way. Therefore, agriculture may not be able to keep up with food demands and would need to further increase its production. This could continue to drive climate change and exacerbate the impacts on agriculture in a cycle of detrimental effects.
What are the other options?
One solution is reducing food loss (by food suppliers) and waste (by retailers, food service providers and consumers). It is thought that, globally, around one-third of all food produced for human consumption is lost or wasted every year. This amounts to about 1.3 billion tonnes of food per year. When this is buried in landfills, it is broken down by microorganisms using anaerobic digestion, producing greenhouse gases (specifically methane and carbon dioxide), which are released into the atmosphere. Some countries, however, have begun to set up food recycling centres to capture these gases to be used as a renewable source of biofuel.
Food waste recycling plant in America. James Loesch via Flickr
By reducing the amount of food wasted, there would be less need to increase agricultural intensification to keep up with the growing population. This can be achieved through several routes, including changing the strict cosmetic standards of many retailers, providing better clarity on food expiration dates and bringing consumers’ attention to how much food they waste each year. For example, through a campaign called ‘Love Food, Hate Waste’, the UK had a 21% reduction in avoidable household waste between 2007 and 2012.
Sustainable farming practices are needed to ensure that global agriculture does not continue to seriously contribute to climate change. Through research into sustainable practices and better techniques, agriculture may be better able to provide enough food for the global population without compromising our environment. By reducing livestock numbers, increasing the efficiency of fertiliser application and better management for manure, the EU reduced agricultural emissions by 24% between 1990 and 2012. Additionally, the UK government is changing how they subsidise farmers. The Sustainable Farming Incentive, piloted by Defra, will reward acts that improve environmental outcomes and reduce carbon emissions. This should hopefully help to increase the sustainability of our agriculture, reducing its impact on climate change.
Another potential solution is regenerative farming, a practice that aims to reverse the impacts of and contribution to climate change by rebuilding soil organic matter and restoring degraded soil biodiversity. This results in an increase in carbon drawdown and an improvement in the water cycle. These farming practices include low- or no-till techniques, increasing plant diversity, introducing cover crops and crop rotations and minimizing physical disturbance. It also includes growing trees and shrubs around crops, using perennial crops that do not need to be replanted annually and creating borders of pollinator habitats. It is hoped that, by restoring the health of soils, farms will be able to increase their yield without negatively impacting the environment, reducing the need for agricultural intensification.
Tilling is used to aerate the soil, prepare seedbeds, suppress weeds, level soil, incorporate fertilisers and turn over cover crops. however, tilling contributes to soil erosion, surface runoff and carbon emissions. Image by United Soybean Board via Flickr
There is a concern, however, that the reduced tilling may lead farmers to rely more heavily on herbicides to remove unwanted plants. There may also be an increased use of fertilisers, to meet the need for nitrogen to convert carbon into microbial organic matter to allow it to remain sequestered in the soil. Questions have also been raised about whether regenerative farming can sequester additional soil carbon effectively, without decreasing yield or requiring more land for farming. For example if cover crops or additional trees and shrubs are added to farmlands without decreasing yield, then carbon sequestration will increase. However, if yield decreases and habitats such as a forest have to be cleared to replace lost production, then carbon sequestration will either remain the same or decrease.
COP26
There were several pledges and agendas launched at COP26 last year, including the Glasgow Leaders’ Declaration on Forests and Land Use, which intends to halt and reverse forest loss by 2030, reducing agricultural expansion into forest areas; and the Agriculture Innovation Mission for Climate (AIM4C), which looks to fund scientific breakthroughs, public and private applied research, and the development, demonstration and deployment of tactical, actionable and innovative products services and knowledge to producers. AIM4C has been criticised, however, for being over-reliant on technological solutions rather than sustainable farming methods. Other announcements including the climate emissions pledges and the Global Methane Pledge will also impact agriculture and its contribution to climate change, as countries look to introduce new regulations and policies to reduce emissions from farms.
The Koronivia Joint Work on Agriculture (KJWA) was also discussed at COP26. Originally established at COP23 in 2017, KJWA aims to bring discussions of agriculture into the UNFCCC and address agricultural issues through the lens of climate change. This process was set to end at cop26, but due to many areas of disagreement, the roadmap of how the Koronivia process will be going forward was included in the debate at the next meeting of the UN climate process, the Bonn Climate Change Conference, in June 2022.
Summary
Agriculture must keep up with the resource demands of an increasing global population. This is mainly achieved through increasing agricultural land or increasing yield. Both have negative environmental impacts and can contribute to climate change.
Climate change can also negatively impact agriculture, through changing precipitation patterns and extreme weather causing loss of crops and damage to equipment. This, then, requires more agricultural intensification to make up for losses, further contributing to climate change.
Solutions include more sustainable agricultural practices and reducing food waste. This reduces the impacts of agriculture on climate change while also reducing the need for more agricultural intensification. Other practices such as regenerative farming may help to improve soil health and carbon sequestration but there are criticisms about its effectiveness.
Several pledges launched at COP26 will impact agriculture and its contribution to climate change, including the Glasgow Leaders’ Declaration on Forests and Land Use, the Global Methane Pledge and the Agriculture Innovation Mission for Climate.
Useful resources:
The Food and Agriculture Organization of the United Nations’ (FAO) 2013 report: food wastage footprint: impacts on natural resources, illustrating how food is wasted or lost through various stages of the supply chain, highlighting the significant environmental costs.
The 2021 policy paper for the Sustainable Farming Incentive, piloted by the Department for Environment, Food & Rural Affairs (Defra).
A 2019 document outlining the National Farming Union of England and Wales’ (NFU) plans for achieving net zero, outlining the current impacts of agriculture and their goals for increasing sustainability.
Taking its title from a chilling warning made by the United Nations that the world’s soils could be gone within a lifetime, Sixty Harvests Left demonstrates why food and future harvests matter more than ever and shows us how we can restore our planet for a nature-friendly future.
Ian Newton discusses the changes that have occurred in British agriculture over the past seventy years, and the effects they have had on bird populations. He explains how different farming procedures have affected birds and other wildlife, and how an understanding of the processes involved could help in future conservation.
This book examines the climate, environmental, and human effects on agroecosystems and how the existing paradigms must be revised in order to establish sustainable production.
This multidisciplinary book presents state-of-the-art reviews of current SI approaches to promote major food crops, challenges and advances made in technology, and the institutional and policy measures necessary to overcome the constraints faced by smallholder farmers.
This book provides the first widely accessible overview of the concept of sustainable intensification as an innovative approach to agriculture and as a key element in the transition to a green economy.
This book examines over 30 years’ worth of research from the Allerton Project, a research and demonstration farm in the UK. Designed to provide guidance, feedback and recommendations to farmers, practitioners and policymakers, the Allerton Project is an exceptionally well-documented case study of lowland agricultural land management which has the purpose of meeting multiple objectives.
Abundance: Nature in Recovery is a collection of essays by award-winning author, Karen Lloyd. Examining abundance and losses in the natural world, Lloyd laments the lack of sight humanity has for the holes we have created. Looking first at artists such as Mary Newcomb, Carry Akroyd, and Daniel Beltrá, the book begins with the struggles of those trying to draw attention to the damaging impacts of human encroachment on the natural world. While many are beginning to understand the harm we are causing, the momentum of our modern society hasn’t allowed us to stop. By recounting a moment when a willow warbler flies into her house, Lloyd compares the fight of individual people against the systems we operate under with the panicked movements of the bird battering against the glass. We, like the bird, have no perception of how to remove ourselves from ‘the world of window frames and glass’ that we inhabit.
Abundance aims to give a voice to the species and habitats that are often disregarded in the political sphere. Travelling to places such as the Veluwe Forest in Switzerland, the Strathspey woodland in Scotland and the Hungarian Steppe, Lloyd tells the stories of people on the front line of conservation fighting to halt biodiversity loss. The volume of negative environmental news can often be overwhelming, and the author shares her own experience of this feeling in the opening essay. This book is a welcome break, reminding us that conservation success is possible and is taking place right now across Europe.
Through the exploration of local attitudes to conservation efforts, Lloyd touches on current themes such as rewilding and the return of wolves to the UK. Shifting baselines, where the current generation believes what they are seeing in nature around them is the norm and are unaware of the decline over previous generations, are impacting people’s perspective on the return of previously extinct species. Despite some extinctions being relatively recent, such as the beaver, the general public is unused to living with them. Therefore, they fear the impact these species may have on their daily lives. Worries of damage to livelihood and homes have been exacerbated by misconceptions and scapegoating. Lloyd recounts the concerns people have for the threatened wild salmon should beavers be allowed to remain, despite beavers being obligate herbivores, as well as the attempt to blame beavers for a flash flooding event in Alyth, Scotland. But if we are to allow the natural world to recover from the damage we have inflicted upon it, Lloyd believes that nature needs to be placed centre-stage in everything we do.
Wild salmon by Bureau of Land Management via Flickr
Abundance is an engaging and accessible book, presenting personal accounts of seeing firsthand the impacts of anthropomorphic destruction, riveting natural history stories and shocking data. From the conflict between the need for clean energy sources and the impacts of wind farms on birds to the impact of flood protection on beavers and kingfishers, Lloyd discusses our struggle to find effective solutions to tackle our biodiversity crisis. The engaging and entertaining nature of this book only increases as you read. Comparable to a travel book, each essay is a new adventure in wildlife-rich places. From eighty fragments on the pelican to tales from viewing platforms in the Lake District and the adventure of the 2020 lockdowns, the variety will hold your attention until the very end.
The conservation news feature has been a fixture of British Wildlife since it first went to print in 1989, and continues to provide a roundup of the most important stories from the world of conservation in Britain and Ireland, covering campaigns, controversies, new initiatives, publications, and policy developments, all accompanied by expert commentary and analysis.
Here we look back at recent issues of British Wildlife and highlight some of the key stories covered in conservation news, as well as in the main articles, from the past six months.
In January, the Environmental Audit Committee issued the output from an inquiry into water quality in rivers. The overarching conclusion was that the ‘chemical cocktail of sewage, slurry and plastic polluting English rivers puts public health and nature at risk’.
In 2018, a team from the RSPB discussed in British Wildlife how the Landscapes Review (unpublished at that time) could provide the chance to instal nature at the heart of management of protected landscapes in England. The government responded to the review and opened a consultation; in a recent article David Hampson, Policy Officer at RSPB, analyses the response and highlights opportunities for improvement.
On 1st January, Defra issued an updated general licence for bird control in England. This led to further confusion regarding the definition of ‘livestock’ and the timing of when gamebirds are classed as livestock or wildlife.
The current outbreak of Highly Pathogenic Avian Influenza (HPAI), which was first detected in captive birds in October 2022, is the largest and most severe on record and continues to impact captive birds and a number of wild bird species.
There is an abundance of proposals to build new major infrastructure, housing estates, leisure and business parks on open countryside. A report published by the RSPB in February revealed that there were more than 8,000 live planning applications within 500m of an SSSI in July 2021.
On 13th April the government announced that the benthic habitats of Dogger Bank and three other Marine Protected Areas are to be legally protected from all forms of bottom trawling and demersal seine nets.
An increasing number of raptors, including a White-tailed Eagle Haliaeetus albicilla in Dorset this spring, have been found dead in recent years, having ingested the rodenticide brodifacoum, an anticoagulant designed to kill rats. In 2020, 23 raptors were found across England, while 25 were recorded in the first half of 2021. In previous years the numbers had been in single figures.
The new Natural History GCSE was formally announced on 21st April, 11 years since the idea was first proposed.
National Highways, together with the Wildlife Trusts, have launched a new £6 million Network for Nature programme that will create and restore habitats across England.
The Levelling Up and Regeneration Bill was introduced in May, and will see the replacement of the current environmental assessment process with Environmental Outcomes Reports.
Somerset Wetlands, England’s second ‘super’ National Nature Reserve (NNR), was declared on 19th May, the 70th anniversary of the creation of NNRs.
British Wildlife is a subscription-only magazine published eight times per year: visit www.britishwildlife.com or email info@britishwildlife.com for more information. Individual subscriptions start from just £40 – you can subscribe online or by phone (01803 467166).
New Zealand farmers have suggested that the government should impose a levy on agricultural gas emissions to encourage the reduction of methane and nitrous oxide emissions. The government had legislated that farmers must develop an emissions pricing system or agriculture would automatically enter the country’s emissions trading scheme. Grassroots farms have been protesting in recent years against the introduction of environmental regulations, but agriculture currently generates over half of New Zealand’s industrial and household emissions. The sector has been facing significant political pressures over this disproportionate contribution to climate change.
Climate change is impacting whale habitat use in the Gulf of Maine. Warming waters has caused right and humpback whales to shift their use of Cape Cod Bay over the last 20 years. Using aerial surveys conducted from 1998 to 2018, the research team analysed environmental data to study changes in whale habitat use within and across years. The peak use of Cape Cod Bay by these species has sifted almost three weeks later, related to the arrival of spring, which has been changing due to climate change. Right whales may be using Cape Cod Bay for longer periods because climate change has reduced the amount of food available in other Gulf of Maine habitats.
A new study has estimated that 44% of Earth’s land is needed to stop the biodiversity crisis. Environmentalists have been lobbying governments to commit to protecting 30% of Earth’s land, but this may not be enough. A computer-generated global map has been created, showing the most efficiently marked amount of the typically needed territory of 35,561 species. This adds up to around 64 million square kilometres, which would require various levels of conservation management, from a strict ban on most human activities to regulations on sustainable development.
Scientists have used food puzzles to study how otters learn from each other. Using a combination of puzzle boxes and unfamiliar foods, the team observed that Asian short-clawed otters watched their companions and copied others when they sampled the unfamiliar food. This study aimed to understand how captive release otters would cope with unfamiliar food in their natural environments once they were released. The results suggested that if one otter was given pre-release training, it could pass some of that information onto other otters.
The Critically Endangered adult pine hoverfly (Blera fallax) has been seen in the wild in Britain for the first time in almost a decade. In October 2021 and March 2022, larvae were released at RSPB Abernathy and Forestry and Land Scotland Glenmore, bred as part of the Royal Zoological Society of Scotland’s conservation breeding programme. The pine hoverfly is an important part of forest ecosystems due to its role in both pollination and waste recycling.
A scientist from Newcastle University has rediscovered an ‘extinct’ giant tortoise on Fernandina, one of the Galápagos Islands. Through genetic testing of a female tortoise found in 2019 and a previous specimen found in 1906, the researchers found that the two were genetically linked and distinct from all other living species of Galápagos giant tortoises. Other expeditions to the island have found evidence of at least two or three more tortoises, which are hoped to be of the same species.
Microplastics
Scientists have found microplastics in freshly fallen Antarctic snow for the first time after collecting samples from 19 sites in Antarctica. An average of 29 particles per litre of melted snow was found, consisting of 13 different types of plastics. The most common, polyethylene terephthalate (PET), was found in 79% of samples. This plastic is primarily used in drinks bottles and clothing. While researchers suggested that the most likely source for these airborne microplastics is local scientific research stations, modelling has shown that their origin could be up to 6,000km away.
Researchers in the Canary Islands have discovered a new form of marine pollution that they have termed plastitar, a mix of tar and microplastics. This formation of two contaminants is an unassessed threat to coastal environments and could be leaking toxic chemicals, potentially proving deadly for organisms such as algae. There is concern that this formation may be blocking and inhibiting the development of the ecosystem.
Policy
No-anchor zone in Studland Bay has been extended to save seagrass habitats. The scheme, set up in December, was introduced to stop anchors dropping and damaging the seagrass meadows. However, there is concern that this voluntary scheme is not being advertised enough to sailors and that there are not enough eco-moorings, an alternative to conventional anchors that do not scour the seagrass.
In this image it is clear to see how the crown of the mature ash tree is suffering from dieback. (Image by Sarang via commons.wikimedia.org)
What is ash dieback?
Ash dieback is a fungus called Hymenoscyphus fraxineus (known previously as Chalara fraxineus, hence the disease commonly being referred to as ‘Chalara’). The fungus originated in Asia where it is largely harmless to native ash trees; this is because they have developed resistance to it during their long existence side-by-side. It was introduced to Europe around 30 years ago via infected ash saplings, and was first discovered in 2012 in the UK in south-east England. This area remains the most severely affected, although it is systematically spreading throughout the rest of the country.
The fungus overwinters in the leaf litter surrounding the ash tree, and during the summer and autumn it produces fruiting bodies which in turn release huge numbers of spores that land on the leaves of the surrounding trees. They are also carried over large distances by the wind. The spores enter the tree via the leaves and continue to penetrate the plant’s cells, where they eventually block the system responsible for water transport. Young, fragile trees can die very quickly, whereas older, stronger trees may fight back for a while before repeated infections over several years finally kill them.
Why is it a problem and how concerned should we be?
Ash trees play a huge role in woodland diversity and, when present in hedgerows and gardens, are key in connecting fragmented habitats. They are home to a variety of invertebrates, birds and lichens and, as with all trees, contribute to purifying the air and absorbing CO2. As wood from the ash tree is highly valued both for timber and firewood, there is also an economic cost to their loss. This is compounded further by the cost incurred in dealing with the dead trees.
It is expected that, in time, Britain will lose in excess of 80% of its ash trees, incurring a total cost of £15 billion.
How can I recognise the signs of ash dieback?
Ash trees affected by ash dieback initially exhibit dark patches on their leaves which then wilt and go black, and are often shed early. Trees also show characteristic diamond shaped lesions where the branches meet the trunk. Epicormic growth is common as the infected tree becomes stressed – this is where previously dormant buds lower down the trunk begin to show new growth.
The Observatree website features several excellent ID guides, videos and posters designed to help non-specialists identify the presence of ash dieback.
A large lesion on the branch of an infected ash tree. (Image Courtesy of The Food and Environment Research Agency (Fera), Crown Copyright)
What can be done to address the problem?
There is no known cure for ash dieback, although some fungicides have been found to be effective in suppressing the symptoms if they are reapplied every year. Due to the expense of this, they are only really viable for trees of special cultural or heritage value.
Otherwise, the best options moving forwards are to monitor the spread of the disease in the hopes that enough mature trees will show resistance to the fungi that populations can be re-established from their offspring. For this reason, young ash trees should be carefully protected from grazing. Woodlands and parks, particularly those that have lost ash trees, should be replanted with a variety of native and locally grown species to help to protect and improve biodiversity.
In managed parks and gardens, burning the leaf litter around the trees in autumn and winter may be effective in minimising the spread of spores. Similarly, encouraging the public to wash shoes, bikes, buggies and vehicles between visits to different woodlands may also be of some use.
In an infected tree, the centre of the branch commonly turns grey-brown. (Image Courtesy of The Food and Environment Research Agency (Fera), Crown Copyright)
What can I do to help?
There are several things you can do to help:
• Support the Woodland Trust by donating to their Tree Disease Fighting Fund. All donations will go towards efforts to monitor the spread of ash dieback, replanting healthy trees and improving biosecurity measures.
• Practice good woodland hygiene – this includes cleaning shoes, car and bike wheels after visits to woodlands, as well as refraining from taking cuttings or other plant material.
• If you spot an ash tree showing symptoms of ash dieback, you can report it on the TreeAlert website in Britain, or the TreeCheck website in Northern Ireland.
Further reading/resources
Ash | Edward Parker Ash charts the evolution of this magnificent tree, and its 43 species across the northern hemisphere for the past 44 million years. From its significance in ancient Indo-European cultures, to its remarkable properties in treating Alzheimer’s, Parker looks at the botany, cultural history and medicinal uses of the ash tree.
Oak and Ash and Thorn | Peter Fiennes
Immersing himself in the beauty of Britain’s woodlands and the art and writing they have inspired, Peter Fiennes explores our long relationship with the woods and the sad, violent story of how so many have been lost. Just as we need them, our woods need us too. But who, if anyone, is looking out for them?
The Ash Tree | Oliver Rackham
Oliver Rackham delves into the history and ecology of the ash tree, exploring its place in human culture, explaining ash disease, and arguing that globalisation is now the single greatest threat to the world’s trees and forests. There is no more urgent message for our times. We cannot go on treating trees like commodities to be bought and sold.
Ash | Archie Miles Ash looks at every aspect of the tree: its many visual manifestations; the uses of the timber for so many different purposes; its cultural significance in place names, folklore, myth and superstition; its inspirational importance for artists, poets and writers; and, of course, the issues arising from the inevitable spread of ash dieback.
Climate change is weakening trees. Conditions such as extreme heat and drought can impact tree growth, potentially encouraging the formation of shallow root systems. These conditions can also increase the chances of tree diseases thriving. This, along with the potential impact of development, such as road management which damages root systems, is reducing the resilience of trees to stresses such as adverse weather, increasing the likelihood of storm damage.
Climate change and development are weakening trees. Image by Padraic via Flickr
A vulnerable coral species, the pink sea fan, may be likely to spread northwards due to climate change. The species, found in shallow waters from the western Mediterranean to north-west Ireland and south-west England and Wales, is a species of principal importance in England and Wales. A new study, run by the University of Exeter, found that there will likely be an increase in suitable habitats for this species northwards, with existing habitats remaining suitable over the next 60-80 years. The results of this study could hopefully be used to identify areas that are a priority to protect the coral.
Policy
Peatlands are still being burnt, despite the new government ban. Peatlands deeper than 40cm are protected from burning by the new ban introduced last year. However, the RSPB has sent the government evidence of 79 fires that they believe are in breach of these new regulations. Both the RPSB and Greenpeace are calling for a blanket ban on the burning of all peat, regardless of depth. Peatland deterioration has been linked with the release of almost 3.7 million tonnes of carbon dioxide each year in the UK.
Research
New research has shown that sounds can be used to monitor the health of coral reefs. Monitoring the pops, clicks and clacks produced by fish and other marine life can be a non-intrusive, inexpensive and efficient method of tracking the state of coral reefs. Reduced biodiversity in degraded communities results in less activity, and so these reefs do not sound as loud compared to healthy ones. By monitoring decibel levels and comparing soundscapes using underwater microphones, researchers may be able to plan conservation interventions and monitor restoration projects on a long-term basis.
Coral reef sounds could be used to monitor ecosystem health. Image courtesy of Tiket2 via Flickr
A variety of targeted conservation approaches are needed to protect UK bumblebee species. A study, using 10 years of data from Bumblebee Conservation Trust’s citizen science scheme BeeWalk, has found that a ‘one-size-fits-all’ approach to bumblebee conservation may not be an effective method, as there is a wide range of differences between species in the types of habitats they are associated with. Instead, conservation efforts would be better served by being carefully tailored to particular species.
Diatoms, the most important producers of plant biomass in the ocean, could decline due to ocean acidification. These calcifying organisms were previously thought to benefit from ocean acidification as they rely on silica rather than calcium carbonate to build their shells, however, a new study suggests diatom populations could drastically decline. Ocean acidification causes the silicon shells of these species to dissolve more slowly, causing them to sink to deeper water layers. In these layers, these shells chemically dissolve and are converted back to silica. Because of this, the abundance of silica is reduced in the surface layers where new shells are formed, resulting in a decline in diatom populations.
The Marine Stewardship Council, an organisation that certifies fisheries under its blue tick sustainability label, has ordered an independent investigation into allegations of shark finning on tuna vessels in certified Pacific fisheries. Between 2019 and early 2020, reports state that silky sharks and a black-tipped reef shark had their fins cut before being discarded overboard. Both species are classified as Near Threatened.
In other shark news, Grey nurse sharks are thought to be thriving at a popular dive site in Australia, but there are calls for more research into this critically endangered species. Only around 2,000 individuals are estimated to be left in the wild, following persecution during the 1960s and 70s inspired by the movie Jaws. Bass Point, where a large number of grey nurse sharks were counted, was removed as a critical habitat site in 2013. Conservation biologist Adam Stow, who has been studying this species for nearly 20 years, says more research is needed into the impact of climate change on their movements.
Work begins to turn 99,000 hectares in England into ‘nature recovery’ projects. Five landscape-scale projects in the West Midlands, Cambridgeshire, the Peak District, Norfolk and Somerset are aiming to help tackle wildlife loss and the climate crisis, while also improving public access to nature. The proposed projects range from transforming farmland into chalk grassland to restoring dewponds and sustainably managing wetlands.
Just days into May the flowers begin. Image – Oli Haines
Throughout May 2022 Plantlife have once again made their impassioned annual plea for garden owners across the UK to resist the urge to mow lawns and tidy up their gardens and to join in with #NoMowMay. It’s a simple enough premise to leave grassy areas alone for a month, and it has huge benefits for biodiversity at this time of year to do so, giving a wide variety of flowering plants a chance to bloom early in appeal to our rich network of vital pollinators.
As in 2021, we here at NHBS have participated this year by letting the grassy areas on our premises flower and the results were quickly quite astounding. Within days there was a carpet of daisies and dandelions, Germander Speedwell and Black and Spotted Medic, and, as the month progressed and we explored further, the picture grew more and more complex. Tangles of Common Vetch, Creeping Buttercup and Common Mouse-ear proliferated, and tall fronds of Beaked Hawk’s Beard, Ribwort Plantain and Prickly Sow-thistle appeared. Hidden deep within a mixed mat of grasses the miniscule flowers of Cut-leaved Crane’s-bill, Thyme-leaved Speedwell and Scarlet Pimpernel flourished and, at the lawn edges, tall stands of Garlic Mustard and Cleavers towered over the last of the seasons Bluebell flowers.
It can still feel strangely radical to let an area of public space, or even a private garden, to grow wild. Perhaps it can feel like going against the flow to sit back and not mow or trim the grass, and to embrace a modicum of wild chaos. Much of our wildlife relies on the flowering plants that we suppress with our tidiness and our control of lawns. Multitudes of beetles, bees, ants, moths and butterflies have evolved alongside plants that, given half a chance, can still thrive in our green spaces. No Mow May offers us a glimpse into this rich relationship, this conversation in time, and it provides a lifeline. One flower that showed up in our lawn here, by way of an example, is the Cuckoo flower or Lady’s Smock, a light and elegant pink flower of grasslands that is almost exclusively selected by the Orange-tip (and Green-veined White) butterfly in spring to lay their eggs on, as it feeds the caterpillars when they hatch. Growing up to 50cm in height its reach is well within the mowing range.
In addition to the No Mow May initiative, Plantlife have also introduced Every Flower Counts, a citizen science survey that asks participants to count, record and report back the flowers found in a single metre squared patch of lawn . This will enable them to gather important data on the impact that leaving areas to grow can have on abundance and biodiversity.
Our premises at the end of May. Images by Oli Haines
As May winds to a close, species are still beginning to emerge in our lawn ready to flower in June: Spear Thistle, Oxeye Daisy, members of the Carrot family and, with a final flourish of the month, a Bee Orchid slowly opens its blooms right by the footway, surprisingly cryptic until you meet it at ground level.
Bee Orchid (Ophrys apifera). Image – Oli Haines
We hope that we can leave our grass uncut for a little longer so we can see who’s still there to flower, and that those of you who have participated in No Mow May may feel inspired to do the same.
Below is a list (in no particular order) of the flowering plants we discovered on our premises during No Mow May this year and a small selection of guides for wildflowers and grasses, plus some suggested reads for those who have inspired to take wild gardening further.
Birds, Beasts and Bedlam: Turning My Farm into an Ark for Lost Species is an eclectic mix of stories from Derek Gow’s past and from the varied people he’s met and worked with. Opening with an account of his expedition to see bison in Poland, Gow laments the loss of ‘great beasts’ from Britain. We’ve lost much of our megafauna, including steppe bison; aurochs; brown, polar and cave bears; Eurasian and Irish elk; lynx; and wolves. Some of these losses, along with the current rate of habitat destruction, have drastically changed how our ecosystems function.
Derek Gow is a reintroduction expert, farmer and author, best known for his work with beavers, white storks, water voles and wildcats. His first natural history book, Bringing Back the Beaver, was a highly acclaimed success, detailing his firsthand account of the reestablishment of beavers in waterways across England and Scotland. Following Gow’s rewilding and farming adventures, from his first attempt at keeping livestock as a child to his time working at zoos and captive breeding programmes, Gow’s new memoir describes his battles with creating a viable farm and how he is repairing the damage this caused to the land and wildlife.
In 2006, Gow bought a farm next to his property in South Devon. In chapter three ‘Not a Lark or a Lizard Lived There’, Gow details the quiet decline of wildlife on his farm and his slow realisation of the damage he caused by following conventional farming practices. He tells of his final straw moment, when a small mammal trapping course run on his land only turned up two woodmice. The lack of voles indicated a much wider absence of wildlife within the farm, such as the loss of barn owls and kestrels.
Male kestrel offering a vole to a female. Image by Francesco Veronesi via Flickr
After realising the damage that was occurring, Gow started to deconstruct his farm, selling off his livestock and began to try to rejuvenate the land. Through excavations, fencing and accidental escapees, a complex series of watercourses and wetlands were created. Birds, otters, amphibians and insects started to return. But this wasn’t enough. Gow introduced Heck cattle, Iron Age pigs (a hybrid of wild boar and Tamworths), mouflon sheep, Exmoor ponies and even water buffalo to replicate the ecosystem roles of Britain’s lost megafauna. These helped shape not only the species composition and trophic structure of the ecosystem, but also the physical structure of the habitats, conserving and promoting biodiversity. Gow describes how the cattle gouged banks and dug pits in pastures, how pigs created wallows that supported tadpoles and dragonfly larvae, and how the presence of grazing ponies has resulted in an irregular, wilder edge where pastures and woods meet.
Throughout the later chapters, Gow shares the conservation history and reintroduction attempts of two ailing UK species, the water vole (Arvicola amphibius)and the pool frog (Pelophylax lessonae). Water vole populations have significantly declined in recent decades due to predation by the invasive American mink (Neovison vision), habitat degradation, historical persecution and pollution. The reduction in waterways and habitat corridors, the removal of bankside vegetation and the urbanisation of floodplains are among the many ways water vole habitats are being destroyed. Gow recounts the process of creating a successful captive breeding program for water voles, sharing the many mistakes that were made before they found the right cage design. Thousands of water voles have been bred for release projects, helping to boost declining populations.
Human encroachment into watercourses is also thought to have been one of the causes of the extinction of pool frogs in the UK. Reintroductions from populations in Sweden have been underway since 2005. Perhaps unsurprisingly, Gow links both the reintroduction of this species and the efforts for water voles to the reintroduction of beavers. As anyone who has read Bringing Back the Beaverwill know, beavers are ecosystem engineers and shape the habitats they live in. Their actions provide a far more sustainable and natural practice for creating more suitable habitats to facilitate rewilding and the reintroduction of other species.
Beaver pond in Yellowstone National Park. Image by NPS / Neal Herbert via Flickr
Birds, Beasts and Bedlum is a fun, engaging memoir, filled with excentric tales and artful insights into the world of farming, conservation and rewilding. Ending on a lament at the often slow, overcomplicated process of reintroductions and rewilding, this book highlights the need for a better-developed system and large-scale reshaping of the landscape, with a final call for the return of the wolf.
Bleached sea sponges have been found in New Zealand waters for the first time, with extreme ocean temperatures being blamed. Bleaching was found in more than a dozen sites near Breaksea Sound and Doubtful Sound in Fiordland, with as many as 95% of sponges bleached in some parts. These sponges play an important role in the ecosystem by creating habitats for fish and by releasing carbon, which other species feed off. The region had recorded temperatures up to 5°C higher than usual in April, which researchers think has a “very strong correlation” with the bleaching events.
Research
Paleobiologists are using shark teeth to decipher evolutionary processes. By studying multiple tiger shark teeth from different developmental stages, from embryos to adults, a team of researchers are able to draw conclusions about extinct species based on preserved shark teeth. This contribution to our knowledge of dental characteristics during tiger shark development will help researchers understand the developmental and evolutionary processes of both present and extinct sharks.
Extinction risk
Habitat loss is endangering migratory birds in Tanzania. The Kilombero wetland, an important habitat for numerous bird species, is under threat from human-caused degradation, such as recurring drought spells, unsustainable farming practices and overgrazing. Pantaleo Munishi, a Professor of Ecosystems and Conservation at the Sokoine University of Agriculture believes many bird species native to Kilombero will become extinct within a decade as they may be unable to cope.
A new study has found that the number of flying insects has declined by nearly 60% in less than 20 years. This decline threatens our entire ecosystem, and a wide variety of species may go extinct, including wildflowers, songbirds, bats and fish. Scientists are also warning that this loss could increase food bills, as insects play a vital role in pollination and nutrient recycling.
Pink pigeons have made a recovery in Mauritius but the species is still losing genetic diversity. In the 1980s, it was estimated that only around ten pink pigeons were left in the wild. They were threatened by introduced predators such as cats and rats, as well as the loss of almost all of their native forest. Through a captive breeding and release programme, which began with an initial population of 12 birds taken from the wild in the 1970s and 80s, there are around 400 individuals in the wild, downlisting the species from critically endangered to vulnerable. As the population has experienced such a bottleneck, however, there is a risk of “genomic erosion” and individuals becoming less genetically healthy as so many are closely related. This can reduce the chances of the pigeons hatching and fledging successfully, as well as reducing their lifespan. A new study has been published looking into this genomic erosion.
The Finnish Government has approved a proposal for the new Nature Conservation Act, with new updates, provisions and chapters on voluntary ecological compensation, threatened habitats, management of data on the natural environment, and a national biodiversity strategy and action programme. The proposal was first prepared at the beginning of 2020 and is hoped to be entered into force in summer 2023.
Conservation
New nature reserves, pocket parks and a mass community movement will bring nature back to London. Rewilding experts commissioned by the mayor, Sadiq Khan, are drawing up a proposal to rewild the city. Core rewilding areas will be chosen on the outskirts of London and will be connected by nature corridors crisscrossing the city. One plan includes turning parts of the Thames estuary into wetlands.
A record number of dams were removed from Europe’s rivers in 2021. Around 239 dams and weirs were removed across 17 countries last year. These river barriers block fish migration routes, leading to the loss of breeding grounds and reduced species abundance, impacting the ecosystem and species that rely on these fish, such as otters and eagles. More than 1 million barriers still exist on Europe’s rivers, with around 150,000 no longer serving any economic purpose.
A “ground-breaking” biodiversity audit of more than 10,000 species along a 105-mile stretch of coastline in north Norfolk has been created to help any decisions about their future. This stretch included a huge variety of habitats, including saltmarsh, sand dunes, freshwater grazing marshes and other wetlands. The huge database included more than a million biological records and was combined with other ecological datasets, along with knowledge from natural history experts and managers. The audit will hopefully be used to help inform decisions on how best to improve the diversity of the area.
Norfolk saltmarshes and mud flats along the Norfolk Coast Path, by summonedbyfells via Flickr
New wetlands will be created along the West Midlands road network as part of the £6m Network for Nature programme launched by National Highways and the Wildlife Trusts. One wetland, to be created in the Lugg Valley close to the A49, is hoped to bridge a gap for wildlife between Bodenham Lake nature reserve and Wellington Gravel Pits. It is also expected to reduce pollution entering the River Lugg, creating drainage pools close to the A49. In total, 26 projects will develop and restore over 1,700 acres of woodlands, grasslands, peatlands and wetlands across England.
Agricultural Development and Sustainable Intensification
