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ExperimentonsuitablehydrodynamicconditionsforhabitatactivityofAndrias
davidianusandconstructionofsuitabilitycurve
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DINGYang,ZHAOJinyong,PENGWenqi,XIEYixing,YUZicheng,FUYicheng
(1.ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100038,China;
2.ZhangjiajieGiantsalamanderNationalNatureReserveAffairsCenter,Zhangjiajie 427400,China;
3.SchoolofWaterConservancyandHydroelectricPower,HebeiUniversityofEngineering,Handan 056038,China)
Abstract:InordertoexplorethesuitablehydrodynamicconditionsforthehabitatactivitiesofAndriasdavidianus
andcarryouteffectiveconservationmeasures,theeffectsofdifferentflowvelocityandbottomconditiononthehabi
tatactivitiesofAndriasdavidianuswerestudiedthroughoutdoorobservationexperiments.Thefuzzylogicalmethod
wasusedtocomprehensivelyanalyzeexperimentalparameterssuchasthetotaldailyresidencetime(DRT)andthe
dailyoccurrencetimesofAndriasdavidianusatdifferentflowvelocity ,andthesuitableflowvelocityconditionsand
thresholdsweredetermined.TheflowvelocitysuitabilitycurveofAndriasdavidianuswasconstructed ,andthe
channelindexsuitabilitycurveofAndriasdavidianuswasmadeaccordingtotheparametersoftotaldailyresidence
timeofAndriasdavidianuinareaswithdifferentsedime.TheresidencetimeoftheAndriasdavidianusatlowflow
rateaccountedfor69.13% ofthetotaltime ,andtheresidencetimeoftheAndriasdavidianusatmiddleandhigh
flowrateaccountedfor30.87% ofthetotaltime ,andthesuitableflowrateoftheAndriasdavidianuswasdeter
minedtobe0 - 0.5m?s(HSI>0.5,HSIwasthesuitabilityindex).Whentheflowvelocitywas0.1 - 3m?s,the
HSIwasinthepeakarea(HSI>0.8),andwhentheflowvelocitywasgreaterthan0.6m?s,thehabitatsuitability
graduallydecreased.Themostsuitablebottom materialtypesweregravel (8~16mm),pebble(16~250mm)
anddriftstone(>250mm),andwerenotsuitableforactivitiesintheareawheresand(0.062~2.0mm)wasrela
tivelylarge.
Keywords:Andriasdavidianus;observationalexperiments;flowvelocity;sediment;suitabilitycurve
(责任编辑:耿庆斋)
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