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Classification of wetlands has been a problematical task, with the commonly accepted definition of what constitutes a wetland being among the major difficulties. A number of national wetland classifications exist. In the 1970s, the Ramsar Convention on Wetlands of International Importance introduced a first attempt to establish an internationally acceptable wetland classification scheme.〔(" Classification and inventory of wetlands: A global overview" ), D. A. Scott and T. A. Jones, ''Plant Ecology,'' Volume 118, Numbers 1-2, 1995, pp. 3-16, 〕 ==Ramsar classification== (詳細は"Ramsar Classification System for Wetland Type" )〕 The wetlands are classified into three major classes: *Marine/coastal wetlands *Inland wetlands *Human-made wetlands These are further subdivided by the type of water: fresh / saline / brackish / alkaline; and may be further classified by the substrate type of other characteristics. 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「wetland classification」の詳細全文を読む スポンサード リンク
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