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生物多样性 1993
someaspectsofbiologicaldiversityinfreshwaterecosystemsKeywords: biodiversity,freshwaterecosystems,fishes,lakes Abstract: ？comparedwithterrestialandmarineecosystems,freshwaterecosystems,includingriversandlakes,arerelativelyclosed,withlowfeed-backcapacityandstability.however,freshwaternessisoneofthemajorresourcesthathumanbeingsliveon.inthepastdecades,duetoerosioncausedbydeforestation,reductioninlakeareacausedbydrainagetocreatarableland,damagetofishresourcescausedbyoverexploitationandinterceptionoflakesfromrivers,pollutioncausedbydischargeofindustrialwastewater,andeutrophicationcausedbydischargeofurbansewage,thenaturalfreshwaterbiodiversityhasbeendamagedtovariousextents,andreductioninbiodiversityhascuaseddamagetothestructureandfuctioningofthefreshwaterecosystems,decreasingtheavailabilityofthisrenewableresource.thispaperdiscussessomeaspectsofbiologicaldiversityinchinesefreshwaterecosystemsthatareofprimeimportanceforresearch.
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