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The White Lake fen is a small wetland on the shore of White Lake in Lanark County, Ontario in Canada. It has been designated both an Area of Natural and Scientific Interest and a Provincially Significant Wetland; it is also listed as a Special Place in Lanark County.〔Keddy, P.A. 2008. Earth, Water, Fire: An Ecological Profile of Lanark County. General Store Publishing House, Renfrew, Ontario. 73 p. p. 55.〕 Fens are a relatively rare wetland habitat in the region of Lanark County; they can occur on either marble or limestone bedrock. White lake has a granite dome along its north shore, while it spreads over marble bedrock to the south. A number of calcareous fens have developed along the south shore. The largest of these has developed in a long narrow arm of the lake, where it stretches for nearly two kilometers and covers 90 ha.〔Reddoch, J.M. 1984. White Lake Fen. Trail and Landscape 18(3):134-141.〕 This fen has large ares of sedge mat dominated by Wooly Sedge (''Carex lasiocarpa''). Two of the unusual plants there are the orchids ''Pogonia ophioglossoides'' (see photo at lower left) and ''Calopogon tuberosus''.〔Reddoch, J. and Reddoch, A. (1997). The Orchids in the Ottawa District. Canadian Field-Naturalist, 111, 1–185. Appendix 2.〕 There are also many species of ericaceous shrubs including Labrador Tea (''Ledum groenlandicum''), ''Kalmia angustifolia'', and ''Andromeda glaucophylla''.〔Reddoch, J.M. 1984. White Lake Fen. Trail and Landscape 18(3):134-141.〕 The presence of evergreen shrubs indicates the low nutrient levels in the wetland.〔Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p.〕 In drier locations nearer the shore, there are wet conifer forersts with trees including White Cedar and Black Spruce. Fens connected to open water, like this fen, have been found to differ in subtle ways from more isolated fens.〔Godwin, K. S., Shallenberger, J., Leopold, D. J., and Bedford, B. L. (2002). Linking landscape properties to local hydrogeologic gradients and plant species occurrence in New York fens: a hydrogeologic setting (HGS) framework. Wetlands, 22, 722–37.〕 This fen is also one of the few Canadian locations for the Bogbean Buckmoth〔http://publications.gc.ca/collections/collection_2011/ec/CW69-14-585-2010-eng.pdf〕 a species of silk moth that feeds on another typical fen plant, Bogbean ''(Menyanthes trifoliata)''(see photo at lower right). ==References== File:Pogonia ophioglossoides Orchi 01.jpg|Rose Pogonia grows in the fen at White Lake. File:Fieberklee2.jpg|Bogbean in flower. 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「White lake fen」の詳細全文を読む スポンサード リンク
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