Biological mercury hotspots in the northeastern United States and southeastern Canada
Biological mercury hotspots in the northeastern United States and southeastern Canada
复制标题
美国东北部和加拿大东南部的生物汞热点地区
DOI：
10.1641/b570107
复制
发表时间：
2007-01-01
期刊：
影响因子：
10.1
通讯作者：
Butler, Thomas
中科院分区：
文献类型：
--
作者：
Evers, David C.;Han, Young-Ji;Butler, Thomas
利用生物汞浓度数据集确定了美国东北部和加拿大东南部的生物汞热点地区。利用代表3个主要分类群的8个层和7300多个观测值，确定了5个生物汞热点和9个关注区域。选择黄鲈和潜鸟分别作为汞对人类和生态影响的指示物种。生物汞热点接受高大气汞沉积，具有高景观敏感性，和/或经历较大的水库波动。在梅里马克河流域，当地的汞排放与当地沉积的增加和生物群中汞的高浓度有关。该地区的时间序列数据表明，减少当地来源的汞排放可导致生物群中汞的迅速减少。需要加强汞监测网络，以进一步记录高沉积地区、生物热点地区以及对减排和其他缓解战略的反应。
Biological mercury (Hg) hotspots were identified in the northeastern United States and southeastern Canada using a data set of biotic Hg concentrations. Eight layers representing three major taxa and more than 7300 observations were used to locate five biological Hg hotspots and nine areas of concern. The yellow perch and common loon were chosen as indicator species for the human and ecological effects of Hg, respectively. Biological Hg hotspots receive elevated atmospheric Hg deposition, have high landscape sensitivity, and/or experience large reservoir fluctuations. In the Merrimack River watershed, local Hg emissions are linked to elevated local deposition and high Hg concentrations in biota. Time series data for this region suggest that reductions in Hg emissions from local sources can lead to rapid reductions of Hg in biota. An enhanced Hg monitoring network is needed to further document areas of high deposition, biological hotspots, and the response to emissions reductions and other mitigation strategies.