title: Species sensitivity analysis of heavy metals to freshwater organisms.
abstract: Acute toxicity data of six heavy metals [Cu, Hg, Cd, Cr(VI), Pb, Zn] to aquatic organisms were collected and screened. Species sensitivity distributions (SSD) curves of vertebrate and invertebrate were constructed by log-logistic model separately. The comprehensive comparisons of the sensitivities of different trophic species to six typical heavy metals were performed. The results indicated invertebrate taxa to each heavy metal exhibited higher sensitivity than vertebrates. However, with respect to the same taxa species, Cu had the most adverse effect on vertebrate, followed by Hg, Cd, Zn and Cr. When datasets from all species were included, Cu and Hg were still more toxic than the others. In particular, the toxicities of Pb to vertebrate and fish were complicated as the SSD curves of Pb intersected with those of other heavy metals, while the SSD curves of Pb constructed by total species no longer crossed with others. The hazardous concentrations for 5 % of the species (HC5) affected were derived to determine the concentration protecting 95 % of species. The HC5 values of the six heavy metals were in the descending order: Zn > Pb > Cr > Cd > Hg > Cu, indicating toxicities in opposite order. Moreover, potential affected fractions were calculated to assess the ecological risks of different heavy metals at certain concentrations of the selected heavy metals. Evaluations of sensitivities of the species at various trophic levels and toxicity analysis of heavy metals are necessary prior to derivation of water quality criteria and the further environmental protection.
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, An Wai Da Yang Fang 8, Chaoyang District, Beijing, 100012, People's Republic of China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Xin
authors.affiliation: Solid Waste and Chemicals Management Center, MEP, Yuhui South Road 1, Chaoyang District, Beijing, 100029, People's Republic of China.
authors.forename: Zang
authors.initials: Z
authors.lastname: Wenchao
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, An Wai Da Yang Fang 8, Chaoyang District, Beijing, 100012, People's Republic of China. zgyan@craes.org.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhenguang
authors.affiliation: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China. yghong@scsio.ac.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Yiguo
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, An Wai Da Yang Fang 8, Chaoyang District, Beijing, 100012, People's Republic of China.
authors.forename: Liu
authors.initials: L
authors.lastname: Zhengtao
authors.affiliation: Dalian University of Technology, Dalian, 116052, Liaoning, People's Republic of China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Xianliang
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, An Wai Da Yang Fang 8, Chaoyang District, Beijing, 100012, People's Republic of China.
authors.forename: Wang
authors.initials: W
authors.lastname: Xiaonan
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, An Wai Da Yang Fang 8, Chaoyang District, Beijing, 100012, People's Republic of China.
authors.forename: Liu
authors.initials: L
authors.lastname: Tingting
authors.affiliation: College of Life Sciences, North China University of Science and Technology, Tangshan, 063000, Hebei, People's Republic of China.
authors.forename: Zhou
authors.initials: Z
authors.lastname: Liming
mesh_terms: D000818:Animals; D059001:Aquatic Organisms / Q000187:drug effects*; D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water; D007448:Invertebrates / Q000187:drug effects*; D016015:Logistic Models; D019216:Metals, Heavy / Q000633:toxicity*; D008954:Models, Biological; D018570:Risk Assessment; D013045:Species Specificity; D014714:Vertebrates / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Aquatic organisms; Ecological risks; Heavy metals; Species sensitivity distributions (SSD); Toxicity