Helping save Cumbria’s coastal sands
Cumbria sand dunes. Picture: Natural England
To help combat the biodiversity loss on coastal dunes, a new project has been launched. Dynamic Dunescapes will see layers of turf removed from sand dunes in Cumbria.
Working across important sand dune sites at North Walney NNR, Sandscale Haws and Askam Shore, Natural England and National Trust will create five hectares of new habitat for
threatened sand dune species this winter starting next month. The organisations said when healthy, sand dunes are home to specialist and rare species of plant and animals. Cumbria is known for being one of the few places in the UK that the rare sand dune-dwelling natterjack toad and northern dune tiger beetle can be found.
But, they added, coastal sand dunes are the most threatened habitat type in Europe for biodiversity loss. To make sure that these rare creatures have a thriving future, Cumbria’s dunes need a helping hand from conservationists.
Dynamic Dunescapes is restoring up to 7,000 hectares of sand dune in England and Wales by 2023. It is funded by National Lottery Heritage Fund and the EU LIFE Programme. Partners in Cumbria are Natural England, Cumbria Wildlife Trust and National Trust.
One of the key drivers of the dunes’ ecological decline is a loss of nutrient-poor, bare sandy habitats within the dune system. As more vegetation grows on the dunes, the bare sand becomes stabilised by their roots and a more soil-like turf layer develops. Toads, lizards and insects that burrow in the bare sand find themselves with less space to make their homes, and the plant species like wild pansy and the rare Walney geranium that thrive on bare sand conditions become smothered by turfloving plants.
Turf stripping exposes the bare sand below, and restores the type of habitat that has been lost in recent decades. An eight-tonne excavator and a six-tonne dumper truck will be used to remove the turf from the scrape area, and use the removed material to build into natural features on the site,
which will reduce the amount of disturbance caused moving machinery on and off the site. At Askam, areas of invasive Japanese Rose which are smothering areas of the dunes will also be removed.
Darren Mason, Area Ranger at National Trust Sandscale Haws, says: “With no guarantee currently that countries can keep global temperature rise below 1.5OC, habitats such as sand dune systems become ever more significant in helping protect vulnerable coastal communities and the biodiversity reliant on sand dunes against increasing pressures from climate change. “The work being undertaken by the Dynamic Dunescapes project will create a range of different ages, heights, depths and vegetation across Sandscale Haws, which will enable the site to adapt to the effects of climate change and become more resilient in the future.” Turf stripping is a tried-and-tested technique used by sand dune site managers.
Dynamic Dunescapes partner organisation Cumbria Wildlife Trust have used turf stripping to rejuvenate large areas of South Walney Nature Reserve – with the meadows that formed in ‘stripped’ areas displaying double the number of plant species than before the diggers got to work. Sarah Dalrymple, Cumbria Wildlife Trust, led the Dynamic Dunescapes-funded turf stripping that took place at South Walney Nature Reserve in the winter of in 2020/2021, said: “Dune restoration at South Walney began in 2015 through the Dunes of Barrow project and has continued with the Dynamic Dunescapes project. “We have removed a thin layer of species-poor topsoil to expose bare sand underneath, encouraging rarer dune species and increasing plant diversity.
It’s been a great success, with almost 5 hectares of grassland restored to the dune habitats that would have existed here until 100 years ago.”
People are asked to keep their distance from the work, keep dogs under close control and to pay attention to signs on site.
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