28780.黃河上游龍羊峽劉家峽河段水生生物多樣性研究及生態(tài)系統(tǒng)健康評價(jià)

1、西北大學(xué)碩士學(xué)位論文黃河上游龍羊峽劉家峽河段水生生物多樣性研究及生態(tài)系統(tǒng)健康評價(jià)姓名：馮慧申請學(xué)位級別：碩士專業(yè)：動(dòng)物學(xué)指導(dǎo)教師：楊興中20090530AbstractAbstractAccordingtotheaquaticbiodiversitydataduring20052008inHuangheupperreachfromLongyangxiatoLiujiaxia，comparedwiththehistroydata，thes

2、pecies，populationquantityShannon—Weaverindex，andthechangesoftheseindexeswereanalyzedanddiscussedAndonthisbasis，theriverecosystemhealthwasevaluatedTheresultsshowedthat35speciesoffishinthereachfromLongyangxiatoLiujiaxiaand

3、themostofthemwerecyprinidae，whichhad16speciesThesecondlywereloaches，whichhad13speciesComparedwiththehistorydata，thespeciesoffishreduced7speciesandadded14speciesTheaboriginalfishpopulationtakesondowntrendandtheforeignfish

4、populationtakesonuptrendTherewere7phylaand116speciesofphytoplanktonbymicroscopyandmostofthemwerechlorophytathesecondlywerediatomThedominantspecieswereSynedraNitzsschiaclosterium，Navicula，Closterium，SchroederiaandCeratium

5、ThequantityofphytoplanktonWas006X104～1208104ind／L，thedensityofphytoplanktonWas0000903029mg／LIndicatororganismandbiologicaldiversityindicesareusedtoevaluatethedegreeofwaterqualityTheresultsshowsthatthewaterqualityislow—gr

6、adepollutedTherewere4classesand50speciesofzooplanktonbymicroscopyandmostofthemwereprotozoa，whichhad24speciesThesecondlywererotiferwhichhad18speciesThequantityofzooplanktonWas12～1174ind／Landthedensityofzooplanktonwas00000

7、6““03926mg／LTheecosystemhealthofreachfromLongyangxiatoLiujiaxiahadbeenevaluatedbyfishIBI，diversityindexofplankton，waterquantityandwaterqualityTheresultsshowedthattheecosystemhealthWasinthelevelofsubhealthconditionsThemai

8、nfactorseffectedtheecosystemhealthwerethevegetationdegradationofriparianzone，thedevelopmentutilizationofwaterresourcestoohigh，thesurvivalconditionsofaboriginalfishpoorKeywords：phytoplankton；zooplankton；fishIBI；HuangheRiv