Bogs
Area mapped
10,075 ha of blanket bog
Data limitations: This area is lower than the area given for upland bog SSSI. This may be due to more accurate mapping undertaken by DBRC.
Condition of habitat in SSSIs
Five SSSIs (92.5 hectares) contain lowland bog. 79% of habitat is in favourable or unfavourable recovering condition. 21% of this habitat (part of Southleigh and Gotleigh Moors SSSI) is unfavourable declining due to excessive scrub cover.
Five SSSIs (11,606 hectares) contain upland bog (North Dartmoor, South Dartmoor, Tor Royal Bog, Exmoor Coastal Heaths, North Exmoor). 100% is in favourable or unfavourable recovering condition. Key management issues are securing appropriate grazing and burning regimes. Stocking levels are being managed through ESA / HLS. The Forest Fire Project on Dartmoor has been effective in dealing with wild fires and uncontrolled burning. However, condition assessments state that large areas are still species poor and dominated by purple moor-grass and, even under suitable management, will take a long time to recover.
CWS: There are no CWSs designated as bog.
Issues
Grazing (under grazing or over grazing) is one of the key management issues for wetland sites. It is not currently economically viable to maintain farming systems in marginal land in the uplands without agri-environment support. This is due to a range of factors such as the single payment scheme, cost of rearing stock and the static sale price. The number of farmers with livestock on the moors is declining and there is little capacity for investment in the necessary farm infrastructure to support sustainable farming systems.
Reduced hydrological integrity due largely to historical drainage and also erosion of gullies on degraded peatland due to peat cutting / burning and also public / military access.
Designations. Only a very small proportion of the area (~1200 hectares) of Rhôs pasture on Dartmoor National Park is designated as SSSI despite meeting the selection criteria. Without SSSI designation it is often harder to obtain funding via agri-environment schemes.
Successes
Uplands
Stocking levels have been reduced on the uplands and feeding and outwintering of stock has largely stopped. This is partly due to ESA / HLS payments as well as factors such as BSE, foot and mouth and changes to Common Agricultural Policy (CAP) payments. Burning has largely been brought under control on Dartmoor through the Emergency Fire Plan and Forest Fire Project.
The Dartmoor Vision Group is an alliance of hill farmers and agencies. In 2003 ecologists, archaeologists and farmers developed a ‘vision map’ for Dartmoor in order to provide farmers with a clear statement of what they wanted the moorland to look like in 2030. The Dartmoor Hill Farm Project was set up by DNPA in 2003 to help ensure a viable future for Dartmoor farmers.
The Two Moors Butterfly Project has been running since 2005 and aims to increase the populations of marsh fritillary, high brown fritillary and heath fritillary. The project encourages Dartmoor and Exmoor farmers to enter into agri-environment schemes to improve the wildlife value of Rhôs pasture (see Section 4.5).
Mires on the Moors1 was set up in 2010 in order to restore blanket bog communities on Dartmoor and Exmoor. The project is supported by South West Water. Benefits include habitat enhancement, improved water quality and carbon storage (through protection of peat). Water resource management enhancements (slowing the rate of run off) are also being investigated.
Lowlands
DWT’s Working Wetlands project2 has been running since 2008 in the Culm area of Devon. Its main aim is to help farmers to manage and restore Culm grasslands, and associated habitats, in order to enhance the wildlife and water storage value of Culm wetlands.[28]
The Taw River Improvement Project is working in targeted areas in the Taw catchment to secure WFD targets – this includes sensitive management of wet semi-natural grasslands
The Northern Devon Nature Improvement Area commenced in 2012. It aims to restore ecosystem resilience across the Torridge catchment.
Beef and Butterflies in the Blackdown Hills AONB helped farmers manage semi-natural grasslands (mires, wet meadows, hay meadows and heathland) for wildlife and profit. The Project ended in 2013.
3.5 GRASSLAND and HEATHLAND
Broad habitat type
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UK BAP priority habitats identified as key habitats in Devon (Devon BAP, 1998)
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Neutral grassland
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Lowland meadows
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Calcareous grassland
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Lowland calcareous grassland
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Improved grassland
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Coastal and floodplain grazing marsh
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Dwarf shrub heath
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Lowland heathland
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Upland heathland
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Acid grassland
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Lowland meadows are found principally on neutral, often well-drained soils. They are the product of traditional farming practices (grazing or cutting for hay) with little or no input of artificial fertilisers or herbicides. In Devon, they largely remain on isolated or inaccessible parcels of land, often on steep slopes, particularly in the Blackdown Hills, part of South Devon, Dartmoor fringes and in the Culm. They are of particular importance for species such as barn owl, cirl bunting, greater horseshoe bat, shrill carder bee and green-winged orchid.
Lowland calacareous grasslands develop on shallow lime-rich soils generally overlying limestone rocks, including chalk. They are often grazed by sheep, cattle or sometimes horses and a few may be cut for hay. Torbay’s limestone outcrops support extensive areas of calcareous grassland (including Berry Head, Wall’s Hill, Hopes Nose and Sharkham Point), which are of sigificant importance supporting 35 nationally threatened, rare and scarce plants. Calcareous grasslands are also found on the chalk hills of East Devon (Sidmouth to Beer Coast and Axmouth to Lyme Regis undercliffs) and Plymouth’s limestone outcrops.
Coastal and floodplain grazing marsh is defined as periodically inundated pasture or meadow with ditches (which maintain the water levels) containing standing brackish or fresh water. The ditches are especially rich in plants and invertebrates. In Devon grazing marsh is found on rivers such as the Axe, Otter, Clyst, Exe, Creedy and Taw. The largest areas are associated with estuaries where frequent flooding with freshwater in winter and spring creates ideal feeding conditions for a range of over wintering birds. Key areas are Braunton Marsh, Exminster Marshes and Axmouth Marsh.
Lowland heathland is found below 300m and is dominated by dwarf shrubs such as heathers and gorse intermixed with acid grassland, scrub and scattered trees. The main areas in Devon are East Devon Pebblebeds, Haldon ridge, Bovey Basin, Blackdown Hills, Dartmoor fringes, the Culm and Exmoor. Devon’s heathland is valuable for species such as Dartford warbler, nightjar, silver-studded blue and southern damselfly, and is one of the most important habitats for invertebrates in Devon.
Upland heathland is found above enclosed agricultural land and is dominated by dwarf shrubs, particularly heather and western gorse. It can be distinguished from blanket bog (which can also support dwarf shrubs) by occurring on mineral soils and thin peats (<0.5m). Although the upland heathland of Exmoor and Dartmoor forms only a small part of the total UK resource (aprox. 1%) it is important as the only sizeable area in southern Britain which allows transitions between upland and coastal heath. This characteristic is rarely seen elsewhere.
Lowland meadows / neutral grassland
Area mapped
5,116 ha
Data limitations: neutral grassland is generally found as part of a mosaic of habitats and so it is difficult to give a precise figure.
Condition of habitat in SSSIs
There are 19 SSSIs (658 hectares) with neutral grassland. 99% of habitat is assessed to be favourable or unfavourable recovering whilst only 1% (Park Farm Meadows SSSI) unfavourable no change, due to lack of appropriate grazing.
Condition of habitat in CWS
513 CWS contain lowland meadow (many of these are mosaic sites). 106 have been monitored and 30% assessed as Green. Issues include under grazing, scrubbing up, agricultural improvement, bracken encroachment and development.
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