Differences in sensitivity of native and exotic fish species to changes in river temperature

Differences in sensitivity of native and exotic fish

species to changes in river temperature

R.S.E.W. LEUVEN;A.J. HENDRIKS;M.A.J. HULJBREGTS;H.J.R. LENDERS;J. MATTHEWS;G. VAN DER VELDE

【期刊名称】《动物学报（英文版）》 【年(卷),期】2011(057)006

【摘要】This paper describes the effects that temperature changes in the Rhine river distributaries have on native and exotic fish diversity.Site-specific potentially affected fractions (PAFs) of the regional fish species pool were derived using species sensitivity distributions (SSDs) for water temperature.The number of fish species in the river distributaries has changed remarkably over the last century.The number of native rheophilous species declined up until 1980 due to anthropogenic

disturbances

such

as

commercial

fishing,river and

water

regulation,migration barriers,habitat deterioration

pollution.In spite of progress in river rehabilitation,the native rheophilous fish fauna has only partially recovered thus far.The total number of species has strongly increased due to the appearance of more exotic species.After the opening of the Rhine-Main-Danube waterway in 1992,many fish species originating from the Ponto-Caspian area colonized the Rhine basin.The yearly minimum and maximum river temperatures at Lobith have increased by circa 4 ℃ over the period