Nilsen Elena B, Hapke Whitney B, McIlraith Brian, Markovchick Dennis
USGS, USA.
USGS, USA.
Environ Pollut. 2015 Jun;201:121-30. doi: 10.1016/j.envpol.2015.03.003. Epub 2015 Mar 17.
Pacific lampreys (Entosphenus tridentatus) have resided in the Columbia River Basin for millennia and have great ecological and cultural importance. The role of habitat contamination in the recent decline of the species has rarely been studied and was the main objective of this effort. A wide range of contaminants (115 analytes) was measured in sediments and tissues at 27 sites across a large geographic area of diverse land use. This is the largest dataset of contaminants in habitats and tissues of Pacific lamprey in North America and the first study to compare contaminant bioburden during the larval life stage and the anadromous, adult portion of the life cycle. Bioaccumulation of pesticides, flame retardants, and mercury was observed at many sites. Based on available data, contaminants are accumulating in larval Pacific lamprey at levels that are likely detrimental to organism health and may be contributing to the decline of the species.
太平洋七鳃鳗（Entosphenus tridentatus）已在哥伦比亚河流域栖息了数千年，具有重大的生态和文化意义。栖息地污染在该物种近期数量下降中所起的作用鲜有研究，而这正是此项工作的主要目标。在一个涵盖多种土地用途的广大地理区域内的27个地点，对沉积物和组织中的多种污染物（115种分析物）进行了测量。这是北美关于太平洋七鳃鳗栖息地和组织中污染物的最大数据集，也是第一项比较幼虫生命阶段和溯河洄游的成年生命周期阶段污染物生物负荷的研究。在许多地点都观察到了农药、阻燃剂和汞的生物累积现象。根据现有数据，污染物正在太平洋七鳃鳗幼体中累积，其水平可能对生物体健康有害，并可能导致该物种数量下降。
