• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Paleolimnology >A history of acid mine contamination, recovery, and eutrophication in Sandy Lake, Pennsylvania
【24h】

A history of acid mine contamination, recovery, and eutrophication in Sandy Lake, Pennsylvania

机译：宾夕法尼亚州桑迪湖的酸性矿山污染，恢复和富营养化的历史

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Sandy Lake, PA, was subject to acid mine contamination in the 1860s, which led to complete extirpation of fish. The mine effluent was soon diverted, but the watershed experienced continued deforestation, agricultural development, and population growth to the beginning of the twentieth century. Paleolimnological analyses of metals and diatoms clearly show the onset of acid mine drainage with rapid increases in concentrations of iron, manganese and sulfur, and decreases in diatom-inferred pH in the sedimentary profile, and a very rapid recovery following remediation. Diatom-inferred phosphorus suggests a period of oligotrophication following diversion of the acid mine drainage and reduction in lake catchment area. However, analyses of nutrients and algal pigments suggest continued eutrophication to the present in spite of increasing forest cover and a stable population over the last century. Pigments indicate a tenfold increase in phytoplankton, with cyanobacteria becoming a more significant portion of the biomass. Accumulation of sedimentary phosphorus has increased by a factor of 4 and sedimentary organic carbon by a factor of 5 since the mid-1800s.
机译：宾夕法尼亚州的桑迪湖在1860年代遭受酸性矿山的污染，导致鱼类完全灭绝。矿井的污水很快被转移，但是流域经历了持续的森林砍伐，农业发展和人口增长，直到20世纪初。对金属和硅藻的古生物学分析清楚地表明，随着铁，锰和硫的浓度迅速增加，沉积剖面中硅藻推断的pH值降低，酸性矿山排水开始，并且在修复后恢复非常快。硅藻推断的磷表明在酸性矿山的排水改道和湖泊集水区减少后出现了贫营养化时期。然而，对营养物和藻类色素的分析表明，尽管在上个世纪森林覆盖率不断增加，人口稳定，但富营养化仍持续到现在。色素表明浮游植物增加了十倍，其中蓝细菌成为生物质的重要组成部分。自1800年代中期以来，沉积磷的积累增加了4倍，而沉积有机碳的增加了5倍。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号