...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >THE RELATIVE SENSITIVITY OF FOUR BENTHIC INVERTEBRATES TO METALS IN SPIKED-SEDIMENT EXPOSURES AND APPLICATION TO CONTAMINATED FIELD SEDIMENT
【24h】

THE RELATIVE SENSITIVITY OF FOUR BENTHIC INVERTEBRATES TO METALS IN SPIKED-SEDIMENT EXPOSURES AND APPLICATION TO CONTAMINATED FIELD SEDIMENT

机译：底泥暴露中四种底栖无脊椎动物对金属的相对敏感性及其在污染底泥中的应用

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

The relative sensitivity of four benthic invertebrates (Hyalella azteca, Chironomus riparius, Hexagenia spp., and Tubifex tubifex) was determined for Cd, Cu, and Ni in water-only and in spiked-sediment exposures. Survival (median lethal concentrations [LC50s] and the concentrations estimated to be lethal to 25% of test organisms [LC25s]), and endpoints for growth and reproduction (mean inhibitory concentrations [IC25s]) were compared. The sensitivities differed depending on the species and metal, although some trends emerged. In water-only exposures, H. azteca is the most sensitive species to cadmium and nickel, with mean LC50s of 0.013 and 3.6 mg/L, respectively; C. riparius is the most sensitive species to copper, with a mean LC50 of 0.043 mg/L. In the spiked-sediment exposures, the order in decreasing sensitivity to copper is Hyalella = Hexagenia < Chironomus < Tubifex for survival and growth/reproduction. For cadmium, the order in decreasing sensitivity is Hyalella = Chironomus < Hexagenia < Tubifex, and for nickel is Hyalella Hexagenia < Chironomus < Tubifex. Chironomus riparius and Hexagenia spp. survival can be used to distinguish between toxicity caused by different metals. Species test responses in field-collected sediment (Collingwood Harbour, ON, Canada) were examined in an attempt to determine the causative agent of toxicity throughout, using the established species sensitivities. Sediment toxicity was categorized first by comparing species responses to those established for a reference database. Test responses in the field-collected sediment do not support causality by Cu, a suspected toxicant based on comparison of sediment chemistry with sediment quality guidelines.
机译：确定了四种底栖无脊椎动物（Hyalella azteca，Chironomus riparius，Hexagenia spp。和Tubifextubifex）的相对敏感性，这在纯水和加标沉积物暴露中对Cd，Cu和Ni的测定。比较了存活率（中度致死浓度[LC50s]和估计对25％的测试生物具有致死性的浓度[LC25s]）以及生长和繁殖的终点（平均抑制浓度[IC25s]）。尽管出现了一些趋势，但灵敏度因物种和金属而异。在纯水环境中，阿兹台克人对镉和镍最敏感，平均LC50分别为0.013和3.6 mg / L。 riparius C. riparius是对铜最敏感的物种，平均LC50为0.043 mg / L。在加标沉积物暴露中，对铜的敏感性降低的顺序为存活和生长/繁殖的Hyalella = Hexagenia

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