【摘 要】
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Laboratory studies evaluated the sensitivity of Sinella curviseta Brook (Collembola:Entomobryidae)to selected heavy metals(Cu,Pb and Zn).Survival,reproduction a
【机 构】
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Institute of Plant Physiology and Ecology,Shanghai Institutes for Biological Sciences,Chinese Academ
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Laboratory studies evaluated the sensitivity of Sinella curviseta Brook (Collembola:Entomobryidae)to selected heavy metals(Cu,Pb and Zn).Survival,reproduction andgrowth of S curviseta were determined in a 4-week exposure test in an agricultural soil amended with metals to concentrations of 100.200,400,800,1600and 3200mg/kg.Resuits showed reduction in adult survival and reproductive failure at the highest concentrations (3 200meJkg)of Cuand Zn.EC50reproduction values for Cu and Zn were approximately 442 and 2 760 mg/kg,respectively.Application of Pb at all levels resulted in large numbers of progeny and no significant mortality compared to controls.Adult growth rate decreased for ail metal treatments compared to the controls.suggesting that metals affect S.curviseta metabolism and result in slower growth.We showed that reproduction is a slightly more sensitive parameter than growth.Since a growth test needs fewer juveniles and takes ICSS time than a reproduction test,we conclude that the two parametes are complementary and could be used for a better ecotoxicologjcal evaluation of contaminant levels.However,relative growth and reproduction sensitivities should be tested with more chemicals bef.Ore a growth test is accepted as a faster sublethal test than a reproduction test.
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