...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >COMBINED EFFECTS OF ROAD SALT AND AN INSECTICIDE ON WETLAND COMMUNITIES
【24h】

COMBINED EFFECTS OF ROAD SALT AND AN INSECTICIDE ON WETLAND COMMUNITIES

机译：道路盐和杀虫剂对湿地社区的综合影响

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

As the numbers of chemical contaminants in freshwater ecosystems increase, it is important to understand whether contaminants interact in ecologically important ways. The present study investigated the independent and interactive effects of 2 contaminants that frequently co-occur in freshwater environments among higher latitudes, including a commonly applied insecticide (carbaryl) and road salt (NaCl). The hypothesis was that the addition of either contaminant would result in a decline in zooplankton, an algal bloom, and the subsequent decline of both periphyton and periphyton consumers. Another hypothesis was that combining the contaminants would result in synergistic effects on community responses. Outdoor mesocosms were used with communities that included phytoplankton, periphyton, zooplankton, amphipods, clams, snails, and tadpoles. Communities were exposed to 4 environmentally relevant concentrations of salt (27 mg Cl- L-1, 77 mg Cl- L-1, 277 mg Cl- L-1, and 727 mg Cl- L-1) fully crossed with 4 carbaryl treatments (ethanol, 0 mu gL(-1), 5 mu g L-1, and 50 mu g L-1) over 57 d. Contaminants induced declines in rotifer and cladoceran zooplankton, but only carbaryl induced an algal bloom. Consumers exhibited both positive and negative responses to contaminants, which were likely the result of both indirect community interactions and direct toxicity. In contrast to the hypothesis, no synergistic effects were found, although copepod densities declined when high concentrations of both chemicals were combined. The results suggest that low concentrations of salt and carbaryl are likely to have mostly independent effects on aquatic communities. (C) 2016 SETAC
机译：随着淡水生态系统中化学污染物数量的增加，了解污染物是否以生态学重要方式相互作用至关重要。本研究调查了在较高纬度的淡水环境中经常同时发生的2种污染物的独立和交互作用，其中包括常用的杀虫剂（西维因）和路盐（NaCl）。假设是，任何一种污染物的添加都会导致浮游动物数量减少，藻类大量繁殖以及随后的浮游生物和浮游生物消费者减少。另一个假设是污染物的结合将对社区反应产生协同作用。户外中观世界用于包括浮游植物，水生植物，浮游动物，两栖类，蛤，蜗牛和t的群落。社区暴露于4种西维因处理完全与环境有关的4种盐浓度（27 mg Cl-L-1、77 mg Cl-L-1、277 mg Cl-L-1和727 mg Cl-L-1） （乙醇，0μgL（-1），5μgL-1和50μgL-1）历时57天。污染物导致轮虫和枝角类浮游动物的数量下降，但是只有西维因才导致藻类大量繁殖。消费者对污染物表现出积极和消极的反应，这很可能是间接社区相互作用和直接毒性的结果。与该假设相反，虽然当将两种化学品的高浓度组合时co足类的密度下降，但未发现协同作用。结果表明，低浓度的盐和西维因可能对水生生物群落具有主要的独立影响。 （C）2016年SETAC

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