University of New South Wales, Sydney, Australia.
Chemosphere. 2011 Feb;82(7):1050-5. doi: 10.1016/j.chemosphere.2010.10.043. Epub 2010 Nov 10.
Anthropogenic effects such as contamination affect the genetic structure of populations. This study examined the temporal and geographical patterns of genetic diversity among populations of the benthic crustacean amphipod Melita plumulosa in the Parramatta River (Sydney, Australia), following an industrial chemical spill. The spill of an acrylate/methacrylate co-polymer in naphtha solvent occurred in July 2006. M. plumulosa were sampled temporally between December 2006 and November 2009 and spatially in November 2009. Genetic variation was examined at the mitochondrial cytochrome c oxidase subunit I locus. Notably, nucleotide diversity was low and Tajima's D was significantly negative amongst amphipods collected immediately downstream from the spill for 10 months. We hypothesize that the spill had a significant localized effect on the genetic diversity of M. plumulosa. Alternate explanations include an alternate and unknown toxicant or a localized sampling bias. Future proposed studies will dissect these alternatives.
人为影响，如污染，会影响种群的遗传结构。本研究在工业化学品泄漏事件后，调查了澳大利亚悉尼帕拉玛塔河底栖甲壳类蔓足类动物蔓足密鳞短体蛤种群的遗传多样性的时间和地理格局。2006 年 7 月，石脑油溶剂中的丙烯酸盐/甲基丙烯酸盐共聚物发生泄漏。2006 年 12 月至 2009 年 11 月期间，对蔓足密鳞短体蛤进行了时间取样，2009 年 11 月进行了空间取样。在线粒体细胞色素 c 氧化酶亚基 I 基因座检测了遗传变异。值得注意的是，在泄漏后 10 个月内，从泄漏点直接下游采集的蔓足密鳞短体蛤的核苷酸多样性较低，Tajima 的 D 值显著为负。我们假设泄漏对蔓足密鳞短体蛤的遗传多样性有显著的局部影响。其他解释包括替代和未知的有毒物质或局部采样偏差。未来的研究将剖析这些替代因素。
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