County Wildife Site Criteria for Cornwall Appendices

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OLIGOTROPHIC AND DYSTROPHIC LAKES PHTGeneral DescriptionOligotrophic and Dystrophic lakes are water bodies which are caharacterised by low nutrient levels.They are usually found on hard acidic rocks, mosy oftem in the uplands The shore are usually stonywith sparse vegetation such as shoreweed Littorella uniflora. In this PHT, the majority of selected siteswill be more than 2 ha.Area of PHT in Cornwall (ha): estimated (est) 820For this habitat we will take all areasWe have not mapped the distribution of this PHT.Appendix 4 - Information Relating to Priority Habitat TypesCounty Wildlife Sites Criteria
OLIGOTROPHIC AND DYSTROPHIC LAKES: SourcesDataset Description Owner Role in Inventory Access NotesA Study of theTrophic Status ofStandingFreshwater inCornwallA report which givesan assessment of thetrophic state offreshwater inCornwall (McCartney2006)EN Gives details of theTrophic Ranking Score(TRS) of every tetradin the countyERCCIS Good quality TrophicRanking Score (TRS)information whichcorresponds to thetrophic state offreshwater n theAn estimate ofthe extent ofdystrophic,oligotrophic,mesotrophic andeutrophic standingfreeshwater inGresat BritainA report which givesan assessment of thetrophic state offreshwater in Britain(Palmer & Roy 2001)JNCCContains details ofmethodologyOLIGOTROPHIC AND DYSTROPHIC LAKES: CommentsJNCCwebsitecounty.The trophic statusdata is not relevant ata local levelData SourcesA Study of the Trophic Statusof Standing Freshwater inCornwallThe DefinitionFairReliability of PHTInterpretationFairOverall AssessmentGoodCommentThis source is the only reference available.CommentThere are considerable problems. The definition does notclearly specify how the trophic status should be decided. Wehave followed one suggestion and used the plant communities,but these results refer to a tetrad and not to individual waterbodies. Further fieldwork would be needed to clarify thetrophic status of these waters.ExplanationIn general, the use of the TRS approach is a good one. It is clearand unambiguous, follows some of the guidance within thedefinition and corresponds to the trophic status. It isparticularly good at picking out the dystrophic and oligotrophicwaters in Cornwall and is assumed to select the majority ofthose that are eutrophic, but there is a considerable overlap ofoligotrophic, mesotrophic and eutrophic around TRS values of7.0-7.9 (TRS runs from 3.0-10.0).CommentsMaps of the trophic state of waters in Cornwall exist at tetradlevel and estimates of the areas of waters of varying trophicstatus have been made. It is likely that the distribution ofmesotrophic lakes in Cornwall is rather poorly known and thatthe estimate for the total area is likely to be either imprecise orbiased or both.Appendix 4 - Information Relating to Priority Habitat TypesCounty Wildlife Sites Criteria
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HeadingCounty Wildife SiteCriteria
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PENWITHP/K 1P/K 2P3Hayle Estuary an
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K17K18K19K20K21K22K23K24K25K26K/P 2
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R5R6R7R8R9R10R11R12R13R 15.2R/CK 16
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CN/NC 8CN/NC 9CN 10CN 11CN 12CN 13C
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NC/CN 7 NNC/CN 7 SNC/CN 8NC/CN 9NC
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Appendix 2The Selection of Local Si
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However, it is not a significant co
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Where any area has less than ½ of
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West Looe to Watergatehttp://cwtdev
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Appendix 4Information Relating to P
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Upland flushes, fens and swamps PHT
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COASTAL SALTMARSH: SourcesDataset D
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COASTAL SAND DUNES: SourcesDataset
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COASTAL VEGETATED SHINGLE: SourcesD
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ESTUARINE ROCKY HABITATS PHTGeneral
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INTERTIDAL MUDFLATS PHTGeneral Desc
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MAERL BEDS PHTGeneral DescriptionMa
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MUD HABITATS IN DEEP WATER PHTGener
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Sabellaria alveolata REEFS: Sources
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SALINE LAGOONS: SourcesDataset Desc
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SEAGRASS BEDS: SourcesDataset Descr
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SUBTIDAL SANDS AND GRAVELS PHTGener
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LOWLAND MIXED DECIDUOUS WOODLAND PH
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LOWLAND MIXED DECIDUOUS WOODLAND: C
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TRADITIONAL ORCHARDS PHTGeneral Des
Page 54 and 55: UPLAND MIXED ASHWOODS PHTGeneral De
Page 56 and 57: UPLAND MIXED ASHWOODS: CommentsData
Page 58 and 59: UPLAND OAKWOOD PHTGeneral Descripti
Page 60 and 61: UPLAND OAKWOOD: CommentsData Source
Page 62 and 63: WET WOODLAND PHTGeneral Description
Page 64 and 65: WET WOODLAND: CommentsData SourcesA
Page 66 and 67: WOOD-PASTURE AND PARKLAND PHTGenera
Page 68 and 69: The National DefinitionGoodReliabil
Page 70 and 71: ARABLE FIELD MARGINS PHTGeneral Des
Page 72 and 73: COASTAL AND FLOODPLAIN GRAZING MARS
Page 74 and 75: LOWLAND MEADOWS: SourcesDataset Des
Page 76 and 77: LOWLAND CALCAREOUS GRASSLAND PHTGen
Page 78 and 79: LOWLAND CALCAREOUS GRASSLAND: Comme
Page 80 and 81: LOWLAND DRY ACID GRASSLAND: Sources
Page 82 and 83: LOWLAND HEATHLAND PHTGeneral Descri
Page 84 and 85: LOWLAND HEATHLAND: CommentsData Sou
Page 86 and 87: UPLAND HEATHLAND: SourcesDataset De
Page 88 and 89: LOWLAND FENS PHTGeneral Description
Page 90 and 91: PURPLE MOOR GRASS AND RUSH PASTURES
Page 92 and 93: PURPLE MOOR GRASS AND RUSH PASTURES
Page 94 and 95: REEDBEDS: SourcesDataset Descriptio
Page 96 and 97: UPLAND FLUSHES, FENS AND SWAMPS: po
Page 98 and 99: BLANKET BOG: SourcesDataset Descrip
Page 100 and 101: EUTROPHIC STANDING WATER PHTGeneral
Page 102 and 103: MESOTROPHIC LAKES PHTGeneral Descri
Page 106 and 107: PONDS PHTGeneral DescriptionThis PH
Page 108 and 109: RIVERS PHTGeneral DescriptionThe Ri
Page 110 and 111: OPEN MOSAIC HABITATS ON PREVIOUSLY
Page 112 and 113: This appendix provides a more detai
Page 114 and 115: LOCAL ANCIENT WOODLANDSGeneral Desc
Page 116 and 117: LOCAL ANCIENT WOODLANDS: CommentsDa
Page 118 and 119: LOCAL MIXED ASHWOODS: SourcesDatase
Page 120 and 121: LOCAL PARKLANDSGeneral DescriptionT
Page 122 and 123: The National DefinitionGoodReliabil
Page 124 and 125: LOCAL BOUNDARIES: SourcesDataset De
Page 126 and 127: LOCAL FLOODPLAIN GRASSLANDS: Source
Page 128 and 129: LOCAL LOWLAND MEADOWSGeneral Descri
Page 130 and 131: LOCAL LOWLAND MEADOWS: CommentsData
Page 132 and 133: UPLAND DRY ACID GRASSLAND: SourcesD
Page 134 and 135: LOCAL PONDSGeneral DescriptionThe n
Page 136 and 137: Appendix 6Information Relating to S
Page 138 and 139: Monotropa hypopitysMuscari neglectu
Page 140 and 141: FRESHWATER ALGAE, FUNGI AND LICHENS
Page 142 and 143: BRYOPHYTESThese criteria are direct
Page 144 and 145: *Calliergon sarmentosum 50**Calypog
Page 146 and 147: Pottia commutata = Microbryum daval
Page 148 and 149: Moths:Acronicta psi Grey DaggerAcro
Page 150 and 151: BUTTERFLIESBAP species and butterfl
Page 152 and 153: DRAGONFLIES AND DAMSELFLIES (ODONAT
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FISHGainey, in CISFBR (2009), state
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Sites with significant Amphibian as
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Turdus torquatus torquatus Ring Ouz
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Table of Thresholds for wintering w
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Other MammalsCornwall BAP Priority
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Shirt, D.B. (Ed.) (1987) British Re
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Tick when Process CompleteProtocol
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Site Contraction/DeletionDetails of
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Heading
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County Wildife Site Criteria for Cornwall Appendices

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