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首页> 外文期刊>Environmental toxicology and chemistry >DEMOGRAPHY OF SHORT-TAILED SHREW POPULATIONS LIVING ON POLYCHLORINATED BIPHENYL-CONTAMINATED SITES
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DEMOGRAPHY OF SHORT-TAILED SHREW POPULATIONS LIVING ON POLYCHLORINATED BIPHENYL-CONTAMINATED SITES

机译：生活在多氯联苯污染场地上的短尾鹿种群的人口统计学

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摘要

In ecological risk assessment, a key necessity is to understand how contaminants known to have negative impact on laboratory mammals affect the population demography of mammals living in their natural environment. We examined the demography of six local populations of the short-tailed shrew (Blarina brevicauda) living in eastern deciduous forest palustrine habitat along the Housatonic River (MA, USA) on soils contaminated with a range of polychlorinated biphenyl (PCB) concentrations (1.5-38.3 ppm). The objective of the study was to assess whether PCBs adversely affect the population demography of these small mammals living in their natural environment. Blarina were selected for study because they would be expected to readily bioaccumulate PCBs from the soil. Populations were intensively live trapped on 1-ha grids from spring to autumn 2001. There was no relationship between any demographic parameter and PCB soil concentrations. Densities were high (usually exceeding 20/ha, and on two grids exceeded 60/ha in summer); survival was good (typically 60-75% per 30 d); and sex ratio, reproduction rates, growth rates, and body mass were within the ranges reported in the literature. Thus, these shrew populations showed no detectable impact on their population demography from living on PCB-contaminated sites.
机译：在生态风险评估中，一个关键必要条件是了解已知对实验室哺乳动物具有负面影响的污染物如何影响生活在其自然环境中的哺乳动物的人口统计数据。我们研究了居住在舒阿托尼克河（美国马萨诸塞州）沿东部落叶林草栖息地的六个短尾sh（Blarina brevicauda）的六个本地人口的人口统计学，这些土壤受到一系列多氯联苯（PCB）浓度的污染（1.5- 38.3 ppm）。该研究的目的是评估多氯联苯是否会对这些生活在自然环境中的小型哺乳动物的人口统计学产生不利影响。选择Blarina进行研究是因为预期它们会很容易地从土壤中生物富集PCB。从2001年春季到秋季，种群被密集地生活在1公顷的网格上。任何人口统计学参数与PCB土壤浓度之间都没有关系。密度很高（通常超过20 / ha，两个网格夏季均超过60 / ha）；生存期良好（通常每30天60-75％）；性别比，生殖率，生长率和体重均在文献报道的范围内。因此，这些sh积种群生活在多氯联苯污染的地点，对他们的人口人口统计学没有可检测的影响。

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