Sensitivity to cadmium of the standard test species Folsomia candida compared to two other species, Onychiurus yodai and Sinella umesaoi (Collembola) |
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| Authors: | Taizo Nakamori Satoshi Yoshida Yoshihisa Kubota Tadaaki Ban-nai Nobuhiro Kaneko Makiko Hasegawa Ryosaku Itoh |
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| Institution: | aEnvironmental Radiation Effects Research Group, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan;bSoil Ecology, Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Yokohama 240-8501, Japan;cBiological Laboratory, Faculty of Arts and Sciences at Fujiyoshida Showa University, 4562 Kamiyoshida, Fujiyoshida, Yamanashi 403-0005, Japan |
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| Abstract: | Knowing whether test species used for single-species toxicity tests are representative of other species provides valuable information because contaminant effects are often extrapolated to the community level based on these tests. To evaluate how representative the sensitivity of the standard test collembolan species Folsomia candida is for Collembola, we devised toxicity tests using the collembolan species Onychiurus yodai and Sinella umesaoi, which exhibit life-forms different from F. candida. Sensitivity to cadmium (Cd) was compared between F. candida and the novel test species. The 50% effective concentrations for reproduction were 154.7, 72.2 and 40.9 mg Cd/kg dry soil for O. yodai, F. candida and S. umesaoi, respectively. Thus, the reproductive sensitivity of F. candida to Cd was between that of the other two species. Increasing reproductive sensitivity to Cd corresponded to increasing activity levels and a more surface-dwelling life-form. Our data may facilitate the generalisation of effect data for F. candida to other species. |
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| Keywords: | Ecotoxicity test Life-form Representative Reproduction |
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