|
__NOTOC__ There are 63 Sites of Special Scientific Interest (SSSIs) in Cheshire, England, covering a total area of 19,844 hectares (49,035 acres). Of these, 51 have been designated for their biological interest, 7 for their geological or geomorphological features, and 5 for both.〔(【引用サイトリンク】 work=Natural England )〕 SSSIs are governed by the Wildlife and Countryside Act 1981, which mandates that sites be selected for their "flora, fauna, or geological or physiographical features".〔''Guidelines for the Selection of Biological SSSIs'', Part A: "Rationale". (Nature Conservancy Council; 1989) (ISBN 086139 544 1). Downloaded from (), 14 April 2010.〕 The body responsible for designating biological SSSIs in England is Natural England,〔(【引用サイトリンク】 work=Natural England )〕 which took over the role of designating and managing SSSIs from English Nature on its creation in 2006. Earth sciences SSSIs are notified separately by the Joint Nature Conservation Committee across the entire UK via Geological Conservation Review.〔(Joint Nature Conservation Committee: Geological Conservation Review (GCR) ) (accessed 14 April 2010)〕 Natural England, like its predecessor bodies, uses a system of areas termed "Areas of Search", which broadly correspond with the 1974–1996 counties,〔 and for consistency the same approach is followed here. In the case of Cheshire, the Area of Search differs from the modern ceremonial county boundary. Since the 1990s, nature conservation in England has also focused on 120 natural areas: regions defined by natural features rather than by administrative boundaries.〔(Natural England: Natural Areas ) (accessed 15 April 2010)〕〔 The Cheshire Area of Search encompasses four natural areas.〔〔(Natural England: Natural Areas: Search Natural Areas ) (accessed 15 April 2010)〕 The majority of the SSSIs fall within the ''Meres and Mosses'' natural area, which covers the bulk of the county, extending into Shropshire and Staffordshire to the south.〔〔(English Nature: Meres and Mosses (27 February 1998) ) (accessed 10 April 2010)〕 This region is dominated by the Cheshire Plain, a wide expanse of flat or gently undulating farmland which rarely rises above 100 metres in elevation. Despite intensive agricultural use, diverse wetland habitats survive including mosses (bogs), swamps, fens, meres and thousands of ponds. Flashes, originating in subsidence after salt extraction, contain examples of inland salt marsh, an extremely rare habitat internationally.〔 Ancient woodland is sparse throughout this area, but is found on the slopes of the Mid Cheshire Ridge and in river valleys towards the north of the county. The lowland heath habitat is very rare, occurring only at a handful of sites. The Mid Cheshire Ridge rises abruptly in the middle of the plain, with a high point of 227 metres; its Triassic sandstones are exposed at the Raw Head geological site.〔 Two extensive sites, Goyt Valley and Leek Moors, lie at the eastern edge of the county and the south-western end of the Pennines, within the ''South West Peak'' natural area of the Peak District.〔〔(Natural England: The South West Peak Natural Area Profile ) (accessed 13 April 2010)〕 At a significantly higher elevation than the other Cheshire SSSIs and underlain by millstone grit and shale, they contain a variety of upland habitats, predominantly heather moorland, grassland and blanket mire.〔 Ten SSSIs are located in Warrington and the former boroughs of Halton and Ellesmere Port & Neston, in the north-west of the county. These fall within the ''Urban Mersey Basin'' natural area, which also covers Greater Manchester and Merseyside. Although the area as a whole is one of the most densely populated regions in Europe, much of the area within Cheshire is farmland. Semi-natural habitats here include ancient woodland, raised bog and freshwater wetland. The Rixton Clay Pits site represents former industrial land, and railway cuttings expose geological features.〔〔(English Nature: The Urban Mersey Basin Natural Area: A Nature Conservation Profile (March 1997) ) (accessed 13 April 2010)〕 Finally, the ''Liverpool Bay'' coastal region contains two estuaries, the Mersey and Dee, which are Cheshire's largest SSSIs.〔〔(Natural England: Liverpool Bay Natural Area: A nature conservation profile (29 October 1997) ) (accessed 14 April 2010)〕 ==Sites== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of Sites of Special Scientific Interest in Cheshire」の詳細全文を読む スポンサード リンク
|