Nguyen-Viet H, Bernard N, Mitchell E A D, Badot P-M, Gilbert D
Laboratory of Environmental Biology, USC INRA, EA 3184, University of Franche-Comté, Place Leclerc F-25030 Besançon, France.
Ecotoxicol Environ Saf. 2008 Jan;69(1):130-8. doi: 10.1016/j.ecoenv.2007.02.007. Epub 2007 Apr 18.
We studied the effects of lead pollution on testate amoebae communities living on Sphagnum fallax by growing this moss under controlled conditions. A progressive series of lead (Pb) concentration was used in the growing solution of the mosses: 0 (control), 625 and 2,500 microgL(-1). The mosses were sampled and analysed for accumulated Pb and testate amoeba communities after 0, 6, 12, and 20 weeks. Species richness, total density and total biomass of testate amoebae declined in response to the Pb treatment and changed over time. The Pb x Time cross-effect was significant for species richness, and total density but not for the total biomass and Shannon diversity. Furthermore, the testate amoebae species richness and the total density were negatively correlated to the Pb concentrations actually accumulated in the moss at the end of the experiment. Species-specific responses of testate amoebae to Pb pollution were identified. Our results thus confirm the sensitivity of testate amoebae to lead pollution.
我们通过在可控条件下培养泥炭藓来研究铅污染对生长在泥炭藓上的有壳变形虫群落的影响。在苔藓的培养液中使用了一系列递增的铅（Pb）浓度：0（对照）、625和2500微克/升。在0、6、12和20周后对苔藓进行采样，分析其累积的铅和有壳变形虫群落。有壳变形虫的物种丰富度、总密度和总生物量因铅处理而下降，并随时间变化。铅×时间的交互效应对于物种丰富度和总密度具有显著意义，但对于总生物量和香农多样性则不显著。此外，在实验结束时，有壳变形虫的物种丰富度和总密度与苔藓中实际累积的铅浓度呈负相关。确定了有壳变形虫对铅污染的物种特异性反应。因此，我们的结果证实了有壳变形虫对铅污染的敏感性。
