North Dartmoor SSSI - Forest - Okehampton Ranges (089)
Staff member responsible: MARTIN LONGLEY
Unit Id: 1031054
Unit area (ha): 1245.4782
Unit Status: Live Gridref: SX 597 886
Main habitat: BOGS - Upland
Date of last site check: 01/10/2019 Checked by: Rob Large

Visited as part of North Dartmoor site check NEFU project, report to follow.

Condition and Comments (click for history): Unfavourable - No change Assessed by: Rob Large
Last assessed: 04/10/2019 Last assessment field visit: 15/08/2019
ISA Survey: View Surveys
Last CSM assessment: 31/07/2013
Estimated year unit will go Favourable: 2020 Confidence in estimate: Low

Visited as part of North Dartmoor site check NEFU project. Habitat features (mires and dry- and wet heaths) were assessed across several units by means of a large number of samples recording all standard condition attributes. Data and a brief summary report are filed in Content Manager under record number D2020/00074342. All three features were found to be unfavourable across the majority of the survey area due to significant failures to meet acceptable thresholds for cover/frequency of positive indicator species in all habitats and in particular for cover of dwarf-shrubs in heathland features. In most cases the driver of poor condition seems to be the expansion of Molinia in both mires and heaths and this may reflect a combination of insufficient grazing in the main growing season, but also probably the continuing effects of historical drainage and/or turbary, perhaps in combination with climate change and nitrogen deposition. Condition was noted as being positively affected in areas where re-wetting/ peatland-restoration measures have been undertaken.

Number of adverse condition reasons: 0
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