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Mapping Valley Mires on Dartmoor (Natural England)

Dartmoor supports many valley mires, some protected by SSSI designation, some recognised as County Wildlife Sites and others with no recognition. These sites support wetland habitats of international importance, including H7140 Transition mires and quaking bogs and H7150 Depressions on peat of the Rhynchosporion, often in transition to drier semi-natural habitats, such as H4010 Atlantic wet heath. They also support very important populations of wetland birds, e.g. snipe and curlew, and rare and declining invertebrates including the marsh fritillary, southern damselfly and scarce blue-tailed damselfly.

These habitats are not on the whole well recorded and many are not mapped, so opportunities for achieving appropriate management or designation have not been well advanced.

DBRC were engaged to:

  • collate existing information on valley mire systems – including presence, extent, composition (e.g. NVC, rare species), condition (e.g. presence of drainage), and ecohydrological data from all likely parties in the area (including Devon Biodiversity Records Centre, Dartmoor National Park Authority, Natural England, The National Trust, Devon Wildlife Trust, Butterfly Conservation, The Duchy of Cornwall and relevant universities and academics),

  • map this and develop a database to include information on wetland Priority Habitats, Annex 1 habitats and NVC community.provide information for priority habitat and Annex 1 habitat inventory update,

  • provide a analysis of gaps in data and a list of sites in need of new survey or additional survey (including ecohydrological investigation).


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