title: The life-table demographic response of freshwater rotifer Brachionus calyciflorus to multi-metal (Cu, Zn, Cd, Cr, and Mn) mixture interaction.
abstract: The effects of multi-metal mixtures on the life-table demography of rotifers are not well known. In this study, the freshwater rotifer Brachionus calyciflorus was exposed to mixture of Cu, Zn, Cd, Cr, and Mn, and the life-table demographic parameters including net reproductive rate, generation time, life expectancy at hatching, and intrinsic rate of population increase were calculated. The results showed that interactions between a given element concentration, except Mn, and the other four elements mixture concentration affected the intrinsic rate of population increase (p < 0.01). Interactions between Zn concentration, as well as Mn, and the other four elements mixture concentration affected the net reproductive rate and the life expectancy at hatching, respectively (p < 0.05). The variation of parameters with the rise of the other four elements mixture concentrations from 0 to high was mainly attributed to the difference of interaction among the five metals mixture with different ratio of concentrations.
authors.affiliation: Key Laboratory of Biotic Environment and Ecological Safety in Anhui Province, College of Life Sciences, Anhui Normal University, Wuhu, 241000, Anhui, China.
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Xu
authors.forename: Yi-Long
authors.initials: YL
authors.lastname: Xi
authors.forename: Lin
authors.initials: L
authors.lastname: Huang
authors.forename: Xian-Ling
authors.initials: XL
authors.lastname: Xiang
mesh_terms: D000818:Animals; D005618:Fresh Water / Q000032:analysis; D008017:Life Expectancy; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D012098:Reproduction / Q000187:drug effects; D012403:Rotifera / Q000187:drug effects* / Q000502:physiology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical