The role of landscape pattern analysis in understanding concepts of land cover change

(整期优先)网络出版时间:2004-01-11
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Landscapeecologyandlandscapepatternanalysisareimportantcomponentsofnational-scaleprogramstoidentifytrendsinlandcoverchangebecause:1)Statisticsonchangesinlandcoverproportionsarenotspatial.AchangematrixderivedfromGISprovidesusefulinformation,butitdoesnotshowthespatialformofchangeinthelandscape.Landscapepatternmetricsrevealspatialpattern.2)Agrowingbodyofliteraturehasshownthatachangeinlandscapepatternmightindicateimportantchangesinecologicalfunctions:forestconnectivityandspeciesmovements,numberandsizeoffarmpatches,effectsonwaterquality.Spatialpatternisimportantinstructuringecologicalcommunitiesandinmaintainingexistenceofcompetitors.Spatialpatternmaybedeterminedbydisturbanceandmayinturn,determinehowdisturbancespropagatethroughthesystem.3)Sometimeslandscapepatternmaynotsignificantlychange,eventhoughlandcoverproportionsdochange.Or,vice-versa,sometimeslandscapepatterncansignificantlychange,eventhoughlandcoverproportionsdon'tsignificantlychange.4)Landscapepatternisaninherentandimportantpartofdescribinglandscapes:basedontheliterature,oneofthemostimportantdescriptivecharacteristicsofalandscapeisitstexture.Theobjectivesofthispaperareto:1)Explaintheimportanceoftheroleoflandscapeecologyandlandscapepatternanalysisinlandcoverchangestudies;2)Reviewtheliteraturethatspecificallyincorporateslandscapeecologyintolandcoverchangestudies;and3)Listthetheoreticalandtechnicalissuesinvolvedandsuggestsolutionsforthem.