Cornwall's Biodiversity Action Plan - Cornwall Wildlife Trust

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Targets Within this document it has been decided to set targets for the county rather than each individual project. This will allow monitoring and reporting to be consistent with Regional and National BAP targets as there will be direct comparison to methodologies used in defining the targets. At each project development stage realistic targets should be set for habitat maintenance and restoration/expansion. These will then feed into the county targets, i.e. the Wild Penwith Project has contributed x amount to the county targets, y amount to regional and z to the National targets. Maintenance target Data from ERCCIS and Cornwall’s Landcover 1995-2005 (2010) 8 report have been used to establish the baseline figures for each BAP habitat where information is available. Baseline figures are not available for some BAP habitats as insufficient survey work has been undertaken. Different levels of confidence for these figures have been applied, the lack of certainty derives both from the lack of clarity in the habitat definition and incompleteness of fieldwork data in the county. The figures for extent have been used to indicate the maintenance target for each of these BAP habitats. The habitats which have no maintenance figures are due to the fact that these areas of habitat cannot be quantified; however it is important that the current extents of these habitats are maintained. Once these habitats have been surveyed and mapped then numerical targets can be set. Expansion/restoration target The methodologies used to define the expansion/restoration targets vary depending on data available. Three methods have been used and these are summarised below. Method 1 All habitats mapped on South West Nature Map have the expansion/restoration figures for 2050 calculated using the same methodology as that in Review of the South West Biodiversity, BRERC, March 2006 9 , a full description of the methodology can be found in this document. The 2015 figure is derived by assuming a linear rate of increase and dividing the 2050 figure by 8. Method 2 The Review of the South West Biodiversity gives restoration/ expansion targets for both 2015 and 2030 for the region for habitats not mapped on South West Nature Map. The percentage of habitat occurring in Cornwall was calculated and the 2030 aspirational target was calculated using the same proportion as for the region. The target for 2015 was created by averaging the 2010 target and the 2020 aspirational target Method 3 No relevant data exists to produce targets for these habitats. Therefore it should be ensured that these BAP habitats are maintained until further information is available and future targets can be set. It should be noted that these targets are not prescriptive; they are an indication of the scale of local contributions that are needed to deliver regional and national targets. No targets have been set for marine habitats or habitats without any current baseline data; this is something that will need to be addressed at the next 5 year review using the information gained from the mapping projects outlined in this document. 8 www.erccis.co.uk/projects/cornwall_landcover_change 9 www.biodiversitysouthwest.org.uk/docs Page 5
Habitat targets Broad Habitat Acid Grassland Arable and horticulture Boundaries and linear features Broadleaved, mixed and yew woodland Calcareous Grassland Dwarf Shrub Heath Fen, Marsh and Swamp Priority Habitat Maintenance target, ha Restoration/expansion target (ha) by (confidence 2015 2030 2050 level) Aspirational Aspirational 500 (B) 80(2) 200(2) Lowland Dry Acid Grassland Arable field 30 000 m (est) Maintain margins (3) Hedgerows 30 000 km (est) Maintain (3) Maintain (3) Maintain (3) Maintain (3) Maintain (3) Traditional orchards 70 (est) Maintain (3) Maintain (3) Maintain (3) Wood-pasture and parkland 250 (B) Maintain (3) Maintain (3) Maintain (3) Upland 1500 (B) 260(1) 2100(1) oakwood Upland mixed 1700 (B) 300(1) 2350(1) ashwoods Wet woodland 2200 (A) 380(1) 3000(1) Lowland mixed 1600 (est) 280(1) 2200(1) deciduous woodland Lowland 100 (B) Maintain Maintain Maintain calcareous (3) (3) (3) grassland Lowland 6500 (A) 1000(1) 8000(1) heathland Upland 30 (B) 15(2) 40(2) heathland Purple moorgrass and rush pastures 900 (B) 50(2) Culm only Maintain (3) Lowland fens 3100 (B) 500(2) 1300(2) Reedbeds 100 (A) 20(2) 50(2) Improved Grassland Inland rock Upland flushes, fens and swamps Coastal and floodplain grazing marsh Calaminarian grasslands 560 (B) Maintain (3) Maintain (3) Maintain (3) 75 (A) 10(1) 90(1) 50 (est) Maintain (3) Maintain (3) Maintain (3) Littoral rock Open mosaic habitats on previously developed land Intertidal underboulder communities 100 (est) Maintain (3) Maintain (3) Maintain (3) Page 6
Page 1 and 2: Cornwall’s Biodiversity Action Pl
Page 3 and 4: Contents Introduction 2 Background
Page 5 and 6: Introduction It is perhaps fitting
Page 7: Landscape Scale/Ecosystem approach
Page 11 and 12: BAP Volume 4: Priority Project List
Page 13 and 14: Cornwall Biodiversity Action Plan P
Page 15 and 16: Bodmin Moor Mires and Headwaters Bo
Page 17 and 18: China Clay Area The aim of this are
Page 19 and 20: Cornwall’s Super Green Spine (SGS
Page 21 and 22: Linking The Lizard The Lizard Penin
Page 23 and 24: Truro Development - Growth Point Tr
Page 25 and 26: Cetacean BAP species This Cetacean
Page 27 and 28: Connectivity Landscapes are, by def
Page 29 and 30: Marine Atlas This broad project wil
Page 31 and 32: Orchards The county once boasted ex
Page 33 and 34: References BRERC (2006) Review of S
Page 35 and 36: SPECIES LIST TERRESTRIAL SPECIES Fu
Page 37 and 38: Chamaemelum nobile Cicendia filifor
Page 39 and 40: Pyrgus malvae Satyrium w-album Thec
Page 41 and 42: Bird Acrocephalus paludicola Aquati
Page 43 and 44: Lamna nasus Prionace glauca Raja un
Page 45 and 46: APPENDIX 3 Geographical Priority pr

Cornwall's Biodiversity Action Plan - Cornwall Wildlife Trust

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