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1、第24卷第7期生态学报Vol.24,No.72004年7月ACTAECOLOGICASINICAJul.,2004土地利用、溪流级别与溪流河水理化性质的关系123122牟溥,王庆成,AnneE.Hershey,于红丽,郭宝琴(1.DepartmentofBiology,UniversityofNorthCarolinaatGreensboro,Greensboro,NC2740226170USA;2.东北林业大学林学院,哈尔滨150040)摘要:为研究土地利用对溪流水质的影响,对黑龙江省尚志市帽儿山境内阿什河流域的1～5级溪流河水进行采样,同时
2、记载森+-3+林覆盖度、邻近土地利用类型及地貌特征。对溪水样品的的pH,浑浊度,NH42N、NO32N和PO32P浓度进行分析测定。对不同溪流级别和土地利用类型的溪流河水进行分析。结果表明:随着溪流级别的升高和土地利用类型由森林变为农田和村镇,溪+-3-流河水的pH,浑浊度,NH42N、NO32N和PO32P浓度均显著升高。森林植被保存相对较好的1、2级溪流水质最佳,但溪水中溶解无机磷和无机氮的浓度与美国温带地区相似的低级溪流相比,分别高30倍和100倍。河岸带破坏,土地利用的变化,放牧、樵采等频繁干扰造成的土壤侵蚀和养分流失输入是造成该流域溪
3、流富营养化的主要原因。关键词:土地利用;溪流级别;溪流水质Land-use,streamorderandstreamwaterphysicalandchemicalqualities12122PaulPMou,WANGQing2Cheng,AnneE.Hershey,YUHong2Li,GUOBao2Qin(1.DepartmentofBiology,UniversityofNorthCarolinaatGreensboro,Greensboro,NC2740226170USA;2.CollegeofForestry,NortheastFore
4、stryUniversity,Harbin150040,China).ActaEcologicaSinica,2004,24(7):1486～1492.Abstract:StreamwatersamplingwasconductedalongtheAshRivercontinuumfrom1storderto5thorderintheMaoershanExperimentalForestoftheNortheastForestryUniversity,nearMaoershanTownship,ShangzhiCity,Heilongjiang
5、Province.+-3-ThepH,turbidity,concentrationsofNH42N,NO32NandPO42Pweremeasuredöanalyzed.Forestcoverage,surroundingland2usetypeandlandscapecharacteristicsofeachsamplinglocationwererecorded.Land2usecategorywaslaterdeterminedfromrecentaerialphotosandfieldobservationsforeachsampli
6、nglocation.Waterqualityvariableswereevaluatedinresponsetochangesinstreamorderandland2usetypes.Bothstreamorderandland2use(forest,agricultureandurban)werepositively+-correlatedtopH,turbidity,concentrationsofNH42N,NO32Nandanddissolvablephosphate.Althoughwaterqualitywasbetterint
7、heforested1st22ndorderstreams,theconcentrationofdissolvablephosphateandinorganicNweremorethan30and100timeshigher,respectively,thanthoseinthecomparablepristineforestedstreamsintemperateNorthAmerica.Soilerosion,lackofriparianprotection,grazing,overfertilizationandfrequentdistu
8、rbanceslikelycontributedtoeutrophicationofthestreams.Keywords:landuse;strea
