The Spring 2023 issue of Conservation Land Management (CLM) is now out, the first of volume 21, which marks CLM’s 20th year in existence. This issue features an exciting addition to CLM, a brand new Habitat Management for Invertebrates series, beginning with two articles. The remaining articles in this issue cover a range of subjects, including ghost pond restoration and the removal of weirs and dams to improve river habitats – read a summary of the articles below.
The new Habitat Management for Invertebrates series aims to encourage those who are involved in making management decisions on a site to consider invertebrates. In the series’ first article, Roger Morris, Keith Alexander and Robert Wolton highlight the key factors that site managers need to think about when incorporating invertebrates into management plans, discussing the types of data that are most useful and how to interpret these data.
The next article in the series goes on to focus specifically on the management of Aspen forests in the Scottish Highlands. There are around 15 rare or notable species of fly that are associated with the decaying cambium layer under the bark of dead Aspen, the Aspen Hoverfly Hammerschmidtia ferruginea being one of these. The Aspen Hoverfly is considered a flagship species – the correct management for the Aspen Hoverfly benefits several other key species. The priority in management is to make sure that there is a fresh supply of dead wood, and Iain MacGowan describes how this achieved in a way that provides optimal conditions for Aspen Hoverfly larvae, by either moving snapped branches with a diameter over 25cm closer to ground or by bringing in dead wood from adjacent sites. Look out for more articles in the Habitat Management for Invertebrates series in future issues of CLM.
Aspen in the Scottish Highlands. Iain MacGowan/NMS
Only 1% of the rivers in England, Wales and Scotland are free from artificial barriers, which pose a major threat to river wildlife. They lead to habitat fragmentation, interrupt the flow of sediment and obstruct the movement of fish and other organisms. Although some of these barriers have their uses, such as for hydropower, drinking water and irrigation, many are now obsolete. Tim Jacklin outlines the benefits to river habitats of removing these barriers and illustrates possible approaches by describing several different weir removal projects in the UK.
Before and after the removal of a weir in the Dovedale valley. Tim Jacklin
With the move to more intensive farming during the last century, many farmland ponds, which were once dotted across much of the British countryside, were filled in. But not all is lost. These former ponds, known as ‘ghost ponds’, can be resurrected; the seeds of wetland plants and stonewort oospores are still viable and, once a pond is restored, wetland plant communities are quick to recolonise. Carl Sayer et al. describe how to locate ghost ponds, the methods used for excavation, and the management of ponds post restoration.
A resurrected ghost pond. Carl Sayer
Soils play a key role in a number of ecosystem services, such as carbon sequestration, water management and nutrient cycling, and although they were once largely ignored, there is an emerging understanding of the importance of improving the health of soil, particularly in an agricultural context. With a focus on soils on farms, Becky Willson, from the Farm Carbon Toolkit, discusses what soil health is and why it is important, and the key characteristics of good-quality soil.
In this and every issue you can expect to see Briefing, keeping you up to date with the latest training courses, events and publications, and On the ground which provides helpful tips or updates on products relevant to land management. Other features, such as Review, which can include letters from readers or updates from our authors, also regularly appear in CLM.
CLM is published four times a year, in March, June, September and December, and is available by subscription only, delivered straight to your door. Subscriptions start from £22 per year. If you would like to read any of these articles, back issues are also available to purchase individually (subject to availability).
If you are involved in a conservation project and think your experiences could be useful to other practitioners, we would love to hear from you. Feel free to contact us if you are interested in writing for CLM – we will be happy to discuss your ideas with you.
Ospreys are being reintroduced to Ireland, more than 200 years after they were declared extinct. The species has not bred in Ireland since the 1700s but, after years of lobbying, the National Parks and Wildlife Service has agreed to reintroduce Osprey this year. A report from last year showed that 25% of Irish birds are in severe decline, with 37% more showing moderate decline. There are now calls to reintroduce more birds that are now extinct in Ireland.
People are being warned to leave capercailies alone, as this endangered bird stops breeding when disturbed. This species, whose Scottish population consists of only 542 individuals, is on the brink of extinction. It is a criminal offence to disturb capercallie while they are lekking (where males gather to display and fight for the attention of females), nesting or raising young. A birdwatcher was even arrested and charged last year for disturbing them.
Climate change
The hot, dry summer of 2022 has had a major impact on some UK butterfly species. The new study was conducted by Butterfly Conservation, the UK Centre for Ecology & Hydrology, British Trust for Ornithology and Joint Nature Conservation Committee. It showed that species such as the green-veined white, small white, small tortoiseshell, peacock and brimstone experienced greatly reduced numbers following the widespread drought. This is thought to be due to insufficient food for the caterpillars as food plants withered and died in the drought conditions.
The net zero strategy shows that the UK will miss its 2030 emissions cuts targets. According to the government, its policies will only achieve 92% of cuts required, but experts think that is a ‘very generous reading’. The UK has a legally binding requirement to reach net zero emissions by 2050, and it commited under the Paris agreement to cut emissions by 68% by 2030 (compared with 1990 levels). The new strategy is a mix of wins and losses: it requires car manufacturers to ensure 22% of their car sales and 10% of van sales must be of electric vehicles by 2024, but does not lift the ban on onshore windfarms and contains little reference to agriculture.
Policy
A new multi-million pound grant scheme has been launched by Natural England to help rare and threatened species, such as water voles, curlews and natterjack toads. The Species Recovery Programme Capital Grant Scheme will provide projects with £18 million over two years, delivering targeted conservation action through the creation and improvement of specific wildlife habitats, conservation translocation, research and creating solutions to address species decline.
Scientists have found the deepest fish ever recorded at 8,300 metres in the Izu-Ogasawara trench near Japan. A team made up of researchers from Western Australia and Tokyo captured footage of the animal, an unknown snailfish species belonging to the genus Pseudoliparis. Two other snailfish, Pseudoliparis belyaevi, were also filmed at a depth of 8,022m. At this depth, the pressure is 800 times greater than at the surface; snailfish are adapted to live at these high pressures by not having swim bladders and they have a gelatinous layer instead of scales.
A newly described leafless orchid in Sri Lanka has been named. The species was found in a lowland wet zone forest and has been named Gastrodia pushparaga, after a precious yellow sapphire commonly extracted from the same district. This is the third Gestrodia species found in Sri Lanka, the other two being discovered in 1906 and 2020.
An invasive snail is helping an endangered bird in Florida. The snail kite is bouncing back from the threat of extinction, due to the abundance of a new food source. Their original food source, a local apple snail, suffered severe declines due to droughts in the early 2000s. This new non-native island apple snail is five times bigger than the original species; continued monitoring of the snail kite has shown that their bills are getting bigger to accommodate this larger food source.
The Yangtze finless porpoise population has increased for the first time. The latest census conducted by the Chinese Ministry of Agriculture and Rural Affairs shows that the population has increased by over 23 percent in the past five years, from 1,012 to 1,249. This is seen as evidence that the conservation effort for the world’s only freshwater porpoise is effective.
Humans are altering the diet of the Tasmanian devil. Human-modified landscapes may be narrowing the diet of this species and accelerating their decline, according to a new study. Devils living in human-impacted areas, such as cleared land, fed on mainly medium-sized mammals. However, in undisturbed habitats, their diet was broader, including smaller animals such as birds.
There is a drought risk to multiple English regions after a dry February. England had its driest February for 30 years, with some rivers at their lowest on record. Scientists are warning that South West England and East Anglia are at risk of drought unless ‘unseasonably sustained rainfall’ occurs in the coming months.
Global fresh water demand will outstrip supply by 40% by 2030, according to experts. The new report calls for governments to stop subsidising the extraction and overuse of water, and for industries from mining to manufacturing to overhaul any wasteful practices. The report has set out seven key recommendations, including scaling up investment in water management and pricing water properly.
Scientists have delivered the ‘final warning’ on the climate crisis. The final part of the sixth assessment report by the Intergovernmental Panel on Climate Change (IPCC) was set out on Monday. This comprehensive review of the knowledge of the climate crisis took eight years to compile and has one clear message: act now, or it will be too late. The report, called the synthesis report, will most likely be the last assessment while the world has a chance of limiting global temperature rises to 1.5°C.
Policy
Ecological emergency has been declared by councillors in South Tyneside, UK. This is part of efforts to boost the biodiversity in the borough, while also safeguarding the natural environment. This declaration has set out 11 pledges which will increase ‘eco-literacy’, develop ‘member champions’ for biodiversity and ensure that council strategic decisions and policies will consider and maximise nature recovery.
Biodiversity Net Gain (BNG) is a new scheme from the government which requires that all new developments improve the natural environment rather than degrade it. From November 2023 onwards, new developments must make sure that the habitat for wildlife is in a better position than it was before the development.
The developer must try to avoid any loss of habitat in the land that is being developed. If this is not possible, additional habitat must be created, either on-site or off-site; at an alternative area that the developer owns, by purchasing units from a land manager or by buying statutory credits from the government. A combination of all three options can be used to make up BNG, but approval from local planning authorities must be gained.
Who will be affected by this new scheme?
The main people who will be impacted by this new scheme are:
Land managers
Developers/construction
Local Planning Authorities
Ecologists
If you own or manage land in England, you can get paid by selling biodiversity units to developers. Currently, the new scheme will only cover England, although existing regulation in Wales requires developments to provide a net benefit for biodiversity. Within Scotland, the 2019 Planning Act requires developments to provide positive impacts for biodiversity.
How much gain is needed?
Under the Environment Act 2021, all new developments need to deliver at least a 10% net gain, with the habitats needing to be secure for at least 30 years. These areas must be either delivered on-site, off-site or via the new statutory biodiversity credits scheme. A national register will hold records and information of all net gain delivery sites.
How is this measured?
An area will be assessed based on its value to nature so that developers or land managers can understand the biodiversity value of a site. The biodiversity metric can be used to assess the value of the land, demonstrate biodiversity gains or losses, measure direct impacts on biodiversity and compare proposals for creating or enhancing habitats on- or off-site. Creating a consistent approach to biodiversity assessment will help planning authorities and communities to better understand the impacts that development can have on the natural environment and to provide the necessary monitoring to ensure that environmental improvements and mitigations for habitat loss are effective.
The metric will calculate the value of a site as ‘biodiversity units’, which are based on the size of the habitat, its quality or condition and location, including whether the sites are in locations identified as local nature priorities. For example, each habitat condition is assessed based on certain criteria, including essential criteria that must be met to achieve a good condition score. The condition is then scored as either poor, moderate or good. Other factors that affect the biodiversity value include how connected the habitat is with other areas and the rarity or diversity of the habitat and the species found in it.
There have been multiple versions of the biodiversity metric, starting in 2012 when the first metric was piloted. With each new version, changes have been made based on suggestions put forward by experts. Currently, biodiversity metric 3.1 is being used, but the government is advising that a future biodiversity metric 4.0 will be Defra’s standard from November 2023. The calculation tools and user guides can be found on Natural England’s Access to Evidence website.
Once the values are obtained, the developers must deliver a biodiversity gain plan, setting out how the development will deliver this net gain and allowing planning authorities to assess whether the proposals meet objectives. The plan should cover:
how any adverse impacts on habitats will be minimised,
the biodiversity value of the onsite habitat pre- and post-development,
the biodiversity value of any offsite habitat,
if any statutory biodiversity credits will need to be purchased,
any further requirements set out in other legislations.
The UK has lost 90% of its wetland habitats. Image by Stephen Gidley via Flickr.
How will this impact the environment in England?
Development, land-use change and urban expansions are among the leading causes of biodiversity loss. The UK is one of the most depleted countries, having lost nearly half of our biodiversity since the 1970s. We are ranked in the worst 10% globally for biodiversity intactness. Overall, 41% of species in the UK have declined, with 26% of mammals at risk of extinction. We’ve lost 97% of our meadows, 90% of our wetlands and 80% of lowland heathlands. A scheme where development will no longer lead to biodiversity loss, but instead to net gain, is a step in the right direction to preventing further loss and helping to begin repairing our degraded environment.
Replacing any established habitats with new ones, however, will have a temporary negative impact on the environment, as newly created habitats can take years to be properly established. This would mean a short-term loss in biodiversity which may have serious consequences for vulnerable species. This is essentially the same issue with COP26’s Declaration on Forest and Land Use, which does not actually forbid the cutting down of forests, but rather aims to end net deforestation, with forest loss being replaced “sustainably”. However, replacing primary or old-growth forests with new growth has serious negative environmental consequences, as the highly complex ecosystems supported by old-growth forests have an irreplaceable value.
There is hope, however, as the Environment Act includes provisions which will exempt irreplaceable habitats from the BNG requirement, as the National Planning Policy Framework states that “development resulting in the loss or deterioration of irreplaceable habitats…should be refused, unless there are wholly exceptional reasons and a suitable compensation strategy exists”. This, therefore, will prevent the new scheme from weakening existing protection for these irreplaceable habitats such as ancient woodlands.
Ancient woodlands, areas of woodland that have persisted since 1600 (1750 in Scotland), only make up 2.5% of the UK. Image by ines s. via Flickr.
Most important, however, is the need for accurate monitoring to ensure that the pre- and post-development biodiversity values are accurate. A recent report has shown that HS2 Ltd has been undervaluing existing nature and overvaluing its compensation measures, with biodiversity loss from Phase 1 of HS2 being at least 7.9 times higher than calculated, and loss caused by Phase 2a 3.6 times higher. The report found that habitats such as watercourses, ponds and trees had been completely missed out from the data and habitats such as well-established tree-lined and species-rich hedgerows have been valued lower than the new hedgerows HS2 Ltd is planning to plant. Inaccurate reporting will undermine the main aim of the BNG scheme, reducing its effectiveness and continuing the degradation of biodiversity in England.
What are the barriers?
There are several issues which may impact the successful implementation of this new method. The first is a lack of resources within local authorities. All new biodiversity gain plans must be approved by local authorities to make sure they are accurate and meet the correct objectives, therefore there must be someone with ecological expertise within the local planning authorities who can review applications and oversee the delivery of these plans. Additionally, local planning authorities may not be able to identify and set up off-site compensation measures needed if a net gain cannot be produced on-site.
Additionally, a lack of clear information, awareness or training for developers, land owners/managers, planning authorities and farmers is another barrier to the success of this method. If those involved are not given access to the correct training, it is unlikely that BNG will be implemented successfully, delaying developments and putting our environment at continued risk. A further issue includes cost implications, as delivering BNG will involve an extra cost that will need to either be absorbed by developers or passed onto customers. However, the scheme will open a new market for landowners, helping to provide environmentally positive incomes.
There has also been criticism about how the previous iterations of the biodiversity metric classified habitats. Scrubby landscapes, such as those dominated by bramble and ragwort, were classed as a sign of degradation, despite them being key features of many rewilding projects. Certain plants, such as docks, were considered ‘undesirable’ despite being a key food plant for many insect species. Due to these classifications, these areas might not be properly compensated for, meaning that the net gains planning would be inaccurate.
Ragwort, fed on by a cinnabar moth caterpillar. Image by caroline legg via Flickr.
Summary
From November 2023, all new developments must deliver a 10% biodiversity net gain, either through on- or off-site plans or by purchasing statutory credits.
The biodiversity value of the habitats on the development site must be determined using the Biodiversity Metric 4.0, which should be released in Spring 2023.
This scheme will help to reduce biodiversity loss and begin to repair the environment in England, but only if it is properly implemented and enforced.
A lack of funding, awareness and training could be barriers to the successful implementation of this scheme. Other issues such as additional costs and poor habitat classifications are also risks to success.
Australia plans to make an area the size of Germany into a marine park in the Southern Ocean. The area around the Macquarie Island will strengthen the protections currently in place, helping to manage the important ecosystem for millions of seabirds, seals and penguins. The proposal will be open for public consultation, with the plan allowing for the continuation of the small Patagonian toothfish fishery. The expansion of the marine park will increase the amount of protected area in Australia’s oceans to 48.2%.
A historic ocean treaty has been agreed upon after a decade of talks. The High Seas Treaty will protect 30% of international waters by 2030. Currently, only 1.2% of these waters are protected, yet all countries have a right to fish, ship and do research in international waters. The new treaty will establish marine protected areas in international waters limiting how much fishing can take place, as well as restrictions on shipping lane routes and activities such as deep-sea mining.
Climate change
Rising sea temperatures have caused sea urchin populations to plummet in West Australia. A number of molluscs and sea urchins on Rottnest Island have seen declines in numbers of up to 90% between 2007 and 2021. Researchers from Curtin University believe rising sea temperatures are to blame. Rader Reef and Cape Vlamingh are designated as sanctuary zones, with the highest level of protection from human activity, but this still isn’t enough to protect against the catastrophic decline in biodiversity.
A newly described snake is being threatened by mining in Ecuador and Panama. The DiCaprio’s snake is one of five new species of snail-eating snakes from the upper Amazon Rainforest in Ecuador and the Choco-Darien forests of Panama. Both areas have seen an increase in illegal gold mining along rivers and streams during the COVID-19 pandemic which, along with deforestation, is threatening a number of species in these habitats.
Researchers have found 26 Australian species that have recovered from the brink of extinction. They reviewed all the animals that have been listed as threatened under Australia’s Environment Protection and Biodiversity Conservation Act between 2000 and 2022 and discovered that 15 mammals, eight birds, four frogs and one fish no longer met the criteria to be listed as threatened under the Act. This number includes three that had been legitimately delisted during this time. The researchers attributed this recovery to targeted management. However, far more species have become threatened than recovered over the past 20 years.
Canada’s environment minister is planning to use a rare emergency order to protect the last of an endangered owl species. The species is in an area in British Columbia where old-growth forest has been slated for further clearcutting. The northen spotted owl faces serious threats to its population, as only one wild-born northern spotted owl remains, with two others, born as part of a breeding programme, recently released into the wild. Before industrial logging, there were nearly 1,000 northern spotted owls in British Columbia.
Northern spotted owl by Kyle Sullivan via Bureau of Land Management Oregon and Washington via Flickr
New discoveries
A species of ‘ethereal fairy lantern’ has been rediscovered in Japan after being thought extinct for 30 years. The flowering plant in the genus Thismia lives entirely underground except for its lantern-like flowers, rising above the soil during the wet season. Resembling mushrooms, one such species was originally discovered from a single specimen in 1992, but after scientists could not locate another and its habitat was destroyed, it was presumed extinct. A new individual has now been located 30 kilometres away from the original.
Half of the wetlands in Europe, the continental US and China have been lost in the past 300 years, according to a new study. Researchers found that some areas, including the UK, Ireland and Germany, have lost more than 75%. In total, an area the size of India has disappeared globally. More than 60% of these losses were driven by drainage for growing crops on uplands. Other reasons included the conversion to paddy fields, the creation of urban areas and peat extraction.
According to a report by The Wildlife Trusts, HS2 Ltd is “undervaluing” the amount of damage it is doing to the environment while overvaluing the benefits of its compensation measures. Phase 1, covering 140 miles between London and the West Midlands, will cause 7.9 times more nature loss than accounted for, with Phase 2a causing around 3.6 times more. The report found watercourses, ponds and trees that have been missed out from the data produced by the firm, along with problems with how nature is being valued. Well-established, tree-lined and species-rich hedgerows were given lower nature value than the new hedgerows that HS2 Ltd is going to plant.
Erosion of beaches along the south-east coast of Australia is having a significant effect on local biodiversity. Some beaches in the area are becoming increasingly vulnerable to coastal erosion caused by successive years of La Niña events. A study monitoring the shoreline between Noosa’s Main Beach and Coolum found that the shoreline has retreated by about 20 metres, while the sand dunes have receded between 7 and 10m and have been vertically eroded by 2–3m.
Extinction Risk
Sea turtles are under threat from warming seas and hotter beaches, according to new research. Australian scientists have suggested that marine turtles are unlikely to be able to change their nesting behaviour enough to mitigate the effects of higher sea surface temperatures. As the sex ratio of turtle hatchlings is determined by the temperature of the nests, warmer beaches will yield more females, impacting population dynamics. Higher temperatures have also been linked to lower hatchling success rates.
Sea turtles by Dawn Childs/USGS via NPS Climate Change Response via Flickr
The lynx is facing extinction in France, as the population is down to 150 adults at most. DNA tests have shown that the cats’ genetic diversity is so low that they will become locally extinct within the next 30 years unless there is urgent intervention. The species is under pressure from habitat loss, inbreeding, poaching and traffic collisions. The tests have shown that the population has a level of diversity equivalent to only 38 animals, and there are now calls to either introduce more lynxes from healthier groups or replace poached lynxes and exchange orphaned lynx cubs being cared for at wildlife rescue centres in various regions.
Pollution
Emissions of the five most harmful air pollutants dropped in 2018 across the European Union, including nitrogen oxides and ammonia. The new European Environment Agency report for 1990-2018 showed an overall trend of steady but slow progress by EU member states in reducing emissions of the main air pollutants present in Europe. The five most harmful air pollutants dropped between 1.6-6.7% between 2017 and 2018.
Policy
Costa Rica has announced an all-out ban on hammerhead shark fishing. Including smooth hammerhead, scalloped hammerhead and great hammerhead, this executive decree prohibits the capture, transportation, storage or sale of hammerhead sharks or their byproducts. Experts are saying this should have occurred in 2013 when hammerhead sharks were listed under CITES, as the animals were hunted for their fins and populations have declined by around 90% since then.
Scalloped Hammerhead Shark by Kris-Mikael Krister via Flickr
New discoveries
A new silent frog species has been described, found in Tanzania’s Ukaguru Mountains. Researchers discovered this species during an expedition in search of another species, the Churamiti maridadi tree toad. While frogs usually use sound to attract a mate, the males of this new species have tiny spines on their throats. Nearly 25% of all vertebrates in the Ukaguru Mountains are found nowhere else, meaning conservation of the area is essential.
Human activity has degraded more than a third of the Amazon rainforest. New research has shown that up to 38% of the forest has been affected by human actions, with the four key disturbances being fire, selective logging (including illegal practices), extreme drought and edge effects (the changes that occur in areas next to deforested areas). The level of degradation is far greater than previously understood and not only has consequences for the climate crisis and biodiversity loss but also Indigenous and non-Indigenous communities.
England’s coast faces multiple threats from dredging, sewage and pollution. The Environment Agency has warned that dredging will likely increase around the coast, with pollution and sewage adding pressures to coastal ecosystems. In 2021, three quarters of shellfish waters around England failed to meet aspirational standards for environmental protection, with dredging and pollution coming under increased scrutiny following mass die-offs of crabs and lobsters. The findings from the EA report published last week suggest that dredging was unlikely to be the cause but this has been criticised by some scientists. There are now calls for stronger targets to cut pollution, a ban on destructive fishing in marine protected areas, and stricter penalties for sewage discharges.
The UK government has allowed ’emergency’ use of a banned bee-harming pesticide for the third year in a row, just days after the EU tightens protections against emergency deregulations. The neonicotinoid thiamethoxam is lethal to bees, and the authorisation comes just a month after the UK government advocated for a global reduction target at COP15. UK guidance states that emergency applications should not be granted more than once and the UK Expert Committee on Pesticides once again advised against allowing thiamethoxam to be used, but was again ignored by the government.
A new study has found plastic in the scat of fishing cats living near Colombo, Sri Lanka. The plastics varied in size from microplastics to larger macroplastics and were believed to have been ingested via their prey. Only six of the 276 samples taken were found to contain plastics but this is still a concern for the vulnerable species. Further research is needed to assess any potential health impacts on the species.
An investigation has found that endangered sharks are being sold as ‘flake’ in South Australian fish and chip shops. According to the study, less than a third of servings meet seafood labelling standards. Out of 96 fish and chip shops and 10 fresh fish retailers, only 29 servings were actually gummy shark, one of only two shark species that Australian Fish Names Standard says can be sold as flake in Australia. Three servings were narrownose smooth-hound, a critically endangered shark; two were the endangered shortfin mako; one was smooth hammerhead, considered vulnerable; 19 were the critically endangered school shark; and 15 servings were whiskery shark.
Gillnets in Bangladesh are a major threat to both the Ganga River dolphin and the Irrawaddy dolphin. Entanglement in nets, along with boat propeller strikes, killed 130 Ganga River dolphins between 2007 and 2016. Since 2002, the manufacture, marketing, import, hoarding, carrying, possession or use of any kind of gillnet is prohibited but they are still widely used by fishers due to their effectiveness at catching large numbers of fish. There are currently only 2,000 Ganga River dolphins and 6,000 Irrawaddy dolphins left in Bangladesh.
Research
A study has suggested that reaching net zero greenhouse gas emissions in England and Wales by 2050 could lead to an extra 2 million years of life. Many of the proposed policies in the UK will reduce harmful environmental factors such as air pollution, as well as encouraging healthier behaviours such as a balanced diet and exercise. These policies, if implemented, would result in significant reductions in mortality across English and Welsh populations. Retrofitting homes with insulation, reducing red meat consumption, replacing car journeys with walking or cycling, and reducing air pollution could also lead to people living with fewer health conditions.
Seagrass restoration trails have begun in Cornwall. The first round of planting for the project, taking place in the River Fal, has been completed, and is the first attempt by Cornwall Wildlife Trust to restore seagrass meadows. A group of volunteers spent more than 120 hours collecting over 4,000 seeds last summer and planting them. It is hoped that this project will expand to an area 10 times the size used in the first round of trails.
Global NGOs are joining forces to accelerate the campaign to end plastic pollution. The World Economic Forum’s Global Plastic Action Partnership (GPAP), the Ellen MacArthur Foundation’s Plastics Initiative and waste charity WRAP are planning to work together to deliver a circular economy for plastics. This supports international negotiations to deliver a new Plastics Treaty, which began last November and aims to crack down on plastic waste by mid-2025.
Citizen science
Buglife, a conservation charity, is appealing for the public’s help to find a rare beetle in the woodlands of Devon and Cornwall. The blue ground beetle (Carabus intricatus) has only been seen at 15 sites across the south-west of England and south Wales. The species was identified at two new sites on Dartmoor in 2022 but the charity would like people to help find out if it is living in more locations. Buglife is asking for people to take pictures if they think they have spotted the beetle, and to send them to the Dartmoor Blue Ground Beetle project online.
The blue ground beetle by Berard DUPONT via Flickr
Research
A chemical that is used in the production of toilet paper and ‘forever chemicals’ has been found in the bodies of orcas. A team of scientists have analysed tissue samples from six southern resident orcas and six Bigg’s whales that were stranded along the coast of British Columbia from 2006 to 2018. The team, made up of scientists from The Institute for the Ocean and Fisheries, British Columbia Ministry of Agriculture and Food, and Fisheries and Oceans Canada, found that the chemical accounted for 46% of the total pollutants identified. This toxic substance can interact with the nervous system and influence cognitive function.
The golden-crowned sifaka, a critically endangered mammal found in northeast Madagascar. Image by Alex Chiang via Flickr.
Conservation
Beavers are set to be released into Hampshire for the first time in 400 years. A pair will be released at Ewhurst Park estate near Basingstoke, which is being restored for nature and sustainable food production. Beavers were given legal protection in England in 2021, formally recognising them as native wildlife. This keystone species will help to create new wetlands on the estate, which will provide new habitats for dozens of bird and insect species.
Over 5,000 fish from endangered species have been released into the Mekong and Tonle Sap rivers in Cambodia. The ceremony was held by the Cambodian government and the Wonders of the Mekong project at the Chaktomuk River in Phnom Penh, which is connected to both of the larger rivers. The species released included Mekong giant catfish (Pangasianodon gigas), giant barbs (Catlocarpio siamensis) and striped catfish (Pangasianodon hypophthalmus). It is hoped that they will reproduce and increase the rare fish populations in both rivers.
A new herd of Dartmoor ponies have been brought in to boost the population on Thetford heathland in Norfolk. Fifteen ponies have joined the 119 others that currently live in the area and will help to deliver conservation grazing programmes across the nature reserves, including East Wretham Heath. These selective grazers will create a rich variety of different heights and species of vegetation, helping birds such as nightjars and stone curlews.
Extinction risks
The scientists who led the research into the mass die-off of crabs and lobsters along the north-east coast of England say they have not been questioned by the panel investigating the disaster. The review panel is due to send its findings to ministers this week, but they have also been excluded from examining government processes as part of its inquiry. This is raising questions about the potential limitations and reliability of the forthcoming results.
Queensland, Australia, has been urged to end its shark nets and drum lines programme, as scientists call these lethal methods “ineffective” and inhumane. In 2019, Humane Society International won a legal challenge to stop the use of lethal drum lines in the Great Barrier Reef park, but as of 1st December 2022, the Queensland government has only spent $505,000 on replacing the old drum lines with ‘Smart’ catch-and-alert ones. Last year, 15 humpback whales were caught in shark nets, as Queensland does not remove them during whale migration season.
The Winter issue of Conservation Land Management magazine (CLM) landed on our readers’ doormats in December, marking the end of volume 20. Read on to discover what featured in the most recent issue, and some highlights of articles across the entire volume.
The Winter 2022 issue of CLM
Reedbed restoration has benefited a large number of species, the bittern being a classic example; by 1997, ‘booming’ (territorial) males of this species had declined to 11, but this has now increased to over 200. Various techniques and machinery are used to manage reedbed habitats, and in this article Graham White and Steve Hughes provide an overview of the different methods and key strategic issues, such as what to do with cuttings, that need to be considered for the future.
Up until 2010, Nethergill Farm, in the Yorkshire Dales, was managed for intensive sheep rearing. Now under new owners, the current management ethos is to promote biodiversity. Gordon Haycock describes how, in addition to other ecological restoration work, a change to reduce sheep stocking densities and introduce free-roaming cattle across the farm has benefited biodiversity and increased the area of Priority Habitats, such as blanket bog and lowland meadow.
In 1965, the Nature Conservation Review was initiated by the Nature Conservancy, with the aim to identify and assess areas important to nature conservation in the UK. In the 1960s/70s, as part of the review, 26 calcareous grasslands in Dorset were surveyed, and in 2018/19, nearly half a century later, six of these were surveyed again. Peter Hawes et al. compare the results of the two surveys, with the aim of determining if the vegetation had markedly changed during the time between surveys, and discuss the gains and losses that have been made.
During the recent political turmoil in the UK, there were rumours that England’s new agri-environment scheme, Environmental Land Management (ELM), would be scrapped in favour of a return to area-based payments. Thankfully, the future of ELM is now looking more certain, but there are still many unanswered questions surrounding the details. In light of this, Alice Groom provides the latest on farming policy development in England, and also in Wales, Northern Ireland and Scotland.
The selection process behind the formal designation of Sites of Special Scientific Interest (SSSIs) in England is based entirely on the compartmentalisation of a site based on the habitat types within it and the rarity of the species found there. Lacking from this process, however, is consideration of habitat connectivity and the ecosystem services that these habitats provide. In the context of two peat bogs in the north of England, one of which is currently threatened by development, Roger Meade asks if the current selection process is up to scratch.
Highlights from volume 20
This volume has included some fantastic articles, from conservation efforts tailored to specific species to wider management approaches and techniques. Below is a selection of articles from 2022:
Spring 20.1
· Habitat translocations: risks, advantages and key considerations – John Box explains the possible risks and potential benefits of habitat translocations, and sets out the key considerations of this approach.
·Conserving breeding goldeneye in Scotland through nestbox construction – Peter Cosgrove et al. share their observations and lessons learnt from constructing and installing nestboxes for the rare goldeneye duck along the River Spey.
· Environmental DNA for ecologists – Dr Helen Rees provides an overview of eDNA analysis and demonstrates how ecologists can use this technique in conservation.
Summer 20.2
· A guide to conservation land management and greenhouse gas emissions – Malcolm Ausden and Rob Field describe how different habitats and their maintenance impact the climate, and highlight the management practices that provide the greatest climate benefits.
· Viewpoint: Dams without beavers: could Beaver Dam Analogues yield benefits in the UK? While we wait for beavers to become more widespread in the UK, Richard Fleming argues that we need to replicate the benefits of natural beaver dams through the use of Beaver Dam Analogues.
Autumn 20.3
· Eleven years of manual eradication of Japanese knotweed – Claire Malone-Lee reflects on 11 years of manual control of Japanese knotweed in Aston’s Eyot nature reserve, in east Oxford, and demonstrates that it is possible, particularly on small sites or where knotweed is not overly dominant, to successfully eradicate this troublesome invasive without the use of herbicides.
· Time to rewet, replant and restore Yorkshire’s peatlands – Jenny Sharman describes the work of the Yorkshire Peatland Partnership and the process of peatland restoration in Yorkshire where signs of recovery have quickly become apparent.
Three years after peatland restoration began. Jenny Sharman/YPP
Twenty years of CLM
The end of volume 20 is an important milestone for CLM, marking its 20th year in print. Throughout this time, the magazine has strived to showcase innovative conservation projects, novel management techniques and personal experiences and insights of those working on the ground. Volume 21 is set to feature all of this and more, including a brand new series on habitat management for invertebrates and a look at some of the restoration approaches used in marine conservation.
CLM is published four times a year in March, June, September and December, and is available by subscription only, delivered straight to your door. Subscriptions start from £22 per year. If you would like to read any of these articles, back issuesare also available to purchase individually (subject to availability).
If you are involved in a conservation project and think your experiences could be useful to other practitioners, we would love to hear from you. Feel free tocontact us if you are interested in writing for CLM– we will be happy to discuss your ideas with you.
UK wildlife was ‘devastated’ by extreme weather in the UK. The National Trust’s annual audit revealed that 2022 was a dire year for animals, including amphibians, mammals, birds and insects. Due to strong storms, heatwaves and cold snaps, many species and habitats were effected. The wildfires during the hot summer destroyed many heathland areas in Cornwall, Devon and Dorset, impacting rare species such as sand lizards and smooth snakes. This potential ‘new norm’ of extreme weather is creating major challenges for UK biodiversity.
2022 will be the warmest year on record in the UK, according to the Met Office. Provisional figures hint that the annual average temperature from last year will exceed the previous record set in 2014. The 10 warmest years on record have all occurred since 2003, with temperature trends showing that the UK is hotter since we began burning fossil fuels and releasing greenhouse gases into the atmosphere. This new record is showing that climate change is having a real impact.
Unseasonably warm weather is expected this January, with at least eight countries across Europe experiencing record high temperatures. The warmest January day on record was recorded in Poland, Denmark, the Czech Republic, the Netherlands, Belarus, Lithuania and Latvia. The Czech Republic saw temperatures of 19.6°C, compared with the usual average of 3°C.
Polar bears are vanishing from the ‘polar bear capital of the world’ in Canada. The western Hudson Bay is considered a stronghold for this species but government research is showing that there has been a dramatic decline in numbers. Every five years, researchers count the number of bears in the area and extrapolate population trends, with the last count in 2021 estimating 618 bears, down from 842 five years earlier. The reveal showed significant declines in adult females and subadult bears between 2011 and 2021, possibly due to displacements to neighbouring regions or hunting. The bears’ sea-ice habitat has also been disappearing, with the far north of the world warming up to four times faster than the rest of the planet.
New discoveries
A pink coloured variant of the Monotropastrum humile plant, native to East and Southeast Asia, has been discovered to actually be a new species. A 20-year study determined how exactly these plants different, with specimens collected throughout Japan, Taiwan and Vietnam. Originially, there was thought to be only one species in this genus in the world, so this new discovery has deepened our understanding of the plants in the Monotropastrum genus. As this newly recognised species is rare and therefore presumably endangered, the information from this study will hopefully be used to inform conservation efforts.
Eastern quolls have been released into the Australian bush in New South Wales, over sixty years after they were declared extinct on the mainland. The 10 individuals were released into a NSW nature reserve, bolstering an insurance population of quolls. The Barrington population is the largest on the mainland and was established through the Tasmanian Quoll Program. Special fences have been erected to keep out cats, foxes and pigs, as feral invasive predators are thought to have been the cause of the initial population decimation.
The new Habitat Management for Invertebrates series aims to encourage those who are involved in making management decisions on a site to consider invertebrates. In the series’ first article, Roger Morris, Keith Alexander and Robert Wolton highlight the key factors that site managers need to think about when incorporating invertebrates into management plans, discussing the types of data that are most useful and how to interpret these data.
