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Climb to the top of the dunes and have a look at the 360 views of Bournemouth and Purbeck. David Brown, ecologist at the National Trust, talks about the dynamism of sand dunes and the special life that inhabits the area. Across the dunes there are constant cycles of growth and decline, where currently Knoll Beach is eroding by 0.5 metres per year and Shell Bay is growing by 1 metre per year. Within the dunes, localised change (such as animal grazing, extreme weather and people access) also triggers cycles of growth and decline. The result of this constant change, is a mosaic landscape with lots of different types of habitats. Bare sand is one of the very important habitats, which is also dramatically declining. In the 1930s, 30 per cent of the dunes were bare sand now it is just 2 per cent. Species like the meadow pipit, tiger heath beetle and sand lizard rely on bare sand to survive. As the sandy habitat decline, the distribution of these species is equally being squeezed to the edges.
Photo by Charlotte Brown. Music and sound by Laura Reid 2021.
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