摘要
UsingthemethodsofcombininglandscapeecologywithGISspatialanalysis,thispaperanalysesthedynamicsofthemarshlandscapestuctureoftheSanjingPlaininthepast20years,furthermore,takingFujinCounty,locatedinthenorthoftheplain,asanexample,analyzestheconversionbetweenmarshandotherlandusetypes.ItisshownthatthemarshintheSanjiangPlaindecreasedgreatlyinthepast20years,butthetrendhasbeguntoreverse,Themarshareadecreasedby51.33%from1980to1996,whereasitdecreasedby4.19%from1996to2000.Thefragmentationofthemarshincreased;thenumberofthepatchesincreasedby326from1986to1996,whereasitonlyincreasedby18patchesfrom1996to2000,Itisobviousthatthespeedofpatchesnumberdiminishedandthemarshfragmentationdecreased,whichshowsthatthereclamationofthemarshconvertedfromthefragmentationtothebriminalargeareaofthemarsh.Thereclaimedmarshhasmainlyconvertedtopaddyfieldanddryland.Largeareaofthemarsh.Thereclaimedmarshhasmainlyconvertedtopaddyfiedldanddryland.Large-scalereclamationintheSanjiangPlaininfluencesitsnaturalenvironmentdirectly:theclimateoftheregionturnsfromcoldandwettowarmanddry,whichmakesthemarshbothinthelow-temperaturenorthernpartandinthedeeplystagnanteasternpartsuitableforfurtheragriculturaldevelopment.
出版日期
2003年02月12日（中国Betway体育网页登陆平台首次上网日期，不代表论文的发表时间）
