...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >A LONG-TERM COPPER EXPOSURE IN A FRESHWATER ECOSYSTEM USING LOTIC MESOCOSMS: INVERTEBRATE COMMUNITY RESPONSES
【24h】

A LONG-TERM COPPER EXPOSURE IN A FRESHWATER ECOSYSTEM USING LOTIC MESOCOSMS: INVERTEBRATE COMMUNITY RESPONSES

机译：局部生态系统在淡水生态系统中的长期铜暴露：无脊椎动物社区的反应

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

A lotic mesocosm study was carried out in 20-m-long channels, under continuous, environmentally realistic concentrations of copper (Cu) in low, medium, and high exposures (nominally 0, 5, 25, and 75 mu gL(-1); average effective concentrations <0.5, 4, 20, and 57 mu gL(-1) respectively) for 18 mo. Total abundance, taxa richness, and community structure of zooplankton, macroinvertebrates, and emerging insects were severely affected at Cu treatment levels of 25 and 75 mu gL(-1). Some taxa were sensitive to Cu, including gastropods such as Lymnaea spp. and Physa sp., crustaceans such as Chydorus sphaericus, Gammarus pulex, and Asellus aquaticus, rotifers such as Mytilina sp. and Trichocerca sp., leeches such as Erpobdella sp., and the emergence of dipteran insects such as Chironomini. Other taxa appeared to be tolerant or favored by indirect effects, as in Chironimidae larvae, the emergence of Orthocladiinae, and the zooplankter Vorticella sp., which increased in the 25 and 75 mu gL(-1) treatments. After approximately 8 mo of Cu exposure, the macroinvertebrate community in the high treatment was decimated to the point that few organisms could be detected, with moderate effects in the medium treatment, and very slight effects in the low-Cu treatment. Subsequently, most taxa in the high-Cu exposure began a gradual and partial recovery. By the end of the study at 18 mo, macroinvertebrate taxa richness was similar to control richness, although overall abundances remained lower than controls. After 18 mo of copper exposure, a no-observed-effect concentration at the community level for consumers was set at 5 mu gL(-1) (4 mu gL(-1) as average effective concentration), and a lowest-observed-effect concentration at 25 mu gL(-1)(20 mu gL(-1) as average effective concentration). (C) 2017 SETAC
机译：在20m长的通道中进行了低级介观研究，在低，中和高暴露量（标称0、5、25和75μgL（-1））下连续，环境上现实的铜（Cu）浓度下; 18 mo的平均有效浓度分别<0.5、4、20和57μgL（-1）。 Cu处理量分别为25和75μgL（-1）时，浮游动物，大型无脊椎动物和新兴昆虫的总丰度，分类单元丰富度和群落结构受到严重影响。一些分类单元对Cu敏感，包括腹足类动物如Lymnaea spp。和Physa sp。，甲壳纲动物，如Chydorus sphaericus，Gammarus pulex和Asellus aquaticus，以及轮虫，如Mytilina sp.。和Trichocerca sp。，水Er，如Erpobdella sp。，以及二倍体昆虫的出现，如Chironomini。其他类群似乎可以耐受或受到间接作用的青睐，例如在Chi虫科的幼虫，直枝甲虫的出现和浮游动物涡虫中，它们在25和75 g gL（-1）处理中均增加。铜暴露约8个月后，高处理中的大型无脊椎动物群落被减少到几乎无法检测到的微生物的水平，在中等处理中效果中等，而在低铜处理中效果很小。随后，高铜暴露下的大多数分类单元开始逐渐和部分恢复。到研究结束时（18个月），大型无脊椎动物类群的丰度与对照组的丰度相似，尽管总体丰度仍低于对照组。铜暴露18个月后，消费者在社区一级的未观察到的浓度设置为5μgL（-1）（平均有效浓度为4 mu gL（-1）），而观察到的最低浓度为-浓度为25μgL（-1）（20μgL（-1）作为平均有效浓度）。 （C）2017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