Does long term low impact stress cause population extinction?

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• 作者：M.J.B. Amorim^a ; ^{mjamorim@ua.pt} ; C. Pereira^a ; ^{CeciliaManuela.Pereira@UGent.be} ; A.M.V.M. Soares^a ; ^{asoares@ua.pt} ; J.J. Scott-Fordsmand^b ; ^{jsf@bios.au.dk}
• 关键词：Multigenerational ; Tolerance ; Population size distribution ; Skewness ; Kurtosis
• 刊名：Environmental Pollution
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：220
• 期：part_PB
• 页码：1014-1023
• 全文大小：2103 K
• 卷排序：220

文摘

F. candida was exposed to Cd in 40 consecutive reproduction tests (3.5 years multigenerational-MG). EC10 (32 mg Cd/kg) caused population extinction after one year, while EC50 (60 mg Cd/kg) survived. Size distribution shifts could explain extinction (EC10: positive skew, EC50: negative skew). Higher metallothionein levels for EC50 exposed could be a survival strategy. Maximum Cd tolerance limits of F. candida increased for Cd EC50 MG.