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首页> 外文期刊>Environmental toxicology and chemistry >Comparing the Impacts of Sediment‐Spiked Cadmium on Chironomidae Larvae in Laboratory Bioassays and Field Microcosms and the Implications for Field Validation of Site‐Specific Threshold Concentrations
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Comparing the Impacts of Sediment‐Spiked Cadmium on Chironomidae Larvae in Laboratory Bioassays and Field Microcosms and the Implications for Field Validation of Site‐Specific Threshold Concentrations

机译：比较沉积物镉镉对实验室生物测定和现场微观幼虫的影响以及现场特异性阈值浓度的局面验证的影响

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摘要

Information on the effects of pollutants in sediments at an ecosystem level to validate current and proposed risk-assessment procedures is scarce. The most frequent criticism of these procedures is that responses of surrogate species in the laboratory are not representative of responses of natural populations. A tiered approach using both laboratory and microcosm exposures (96-h and 21-d laboratory bioassays and a 3-mo field microcosm) was conducted to compare the impacts of sediment-spiked cadmium on the mortality, development, and abundance of Chironomidae larvae. The 96-h and 21-d lethal concentrations of sediment-spiked Cd to 50% of the species Chironomus riparius were estimated to be 201.07 and 172.66 mg/kg, respectively. In the 21-d laboratory bioassay, the endpoints, including the development rate and emergence ratio, were compared, and the lowest-observed-effect concentration (LOEC) values were 325.8 and 10.7 mg/kg, respectively. The abundance, richness, and biomass of field-collected larvae were compared among the different treatments in the field microcosm, and it was found that the order of sensitivities using different endpoints was biomass (2.6/5.2 mg/kg of no-observed-effect concentration/LOEC) diversity (10.7/21.2 mg/kg) abundance (41.2/82.7 mg/kg). The toxicity values based on lethal/sublethal changes in the laboratory bioassays might not fully protect field organisms against damage from chemicals, such as Cd, unless an assessment factor of 5 is used. These findings highlight the need to conduct field validation of criteria/guidelines before they are introduced to protect organisms/ecosystems in the field and provide a preliminary template for future field validation of criteria elsewhere. Environ Toxicol Chem 2021;00:1-13. (c) 2021 SETAC
机译：有关污染物沉积物在生态系统级别验证当前和拟议风险评估程序的信息的信息是稀缺的。对这些程序的最常见的批评是，实验室在实验室中的反应不是代表自然群体的反应。进行了使用实验室和微观曝光（96-H和21-D实验室生物测定和3-MO域微观）的分层方法，以比较沉积物掺入镉对湿度，发育和丰度的曲征幼虫的影响。沉积物掺入的96-H和21d致命致死浓度估计氯化物的50％曲线率分别为201.07和172.66mg / kg。在21-D实验室生物测定中，比较了终点，包括发育速率和出苗比，分别为325.8和10.7mg / kg。在现场微观的不同治疗中比较了现场收集的幼虫的丰富，丰富性和生物量，发现使用不同终点的敏感性的顺序是生物量（2.6 / 5.2mg / kg无观察到的效果浓度/腰面）＆多样性（10.7 / 21.2 mg / kg）＆丰度（41.2 / 82.7 mg / kg）。除非使用评估因子，否则基于实验室生物测定的基于致死/致死的变化的毒性值可能无法完全保护免受化学物质损坏的田间生物，例如CD的损伤。这些发现强调了在引入保护本领域的生物/生态系统之前进行标准/准则进行现场验证的必要性，并为其他地方的未来现场验证提供初步模板。环境毒素化学2021; 00：1-13。 （c）2021 Setac

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  • 来源
    《Environmental toxicology and chemistry》 |2021年第9期|2450-2462|共13页
  • 作者

    Liu Zhihong; Zhang Chi; Xin Zhuohang; Tai Peidong; Song Changchun; Deng Xin;

  • 作者单位

    Dalian Univ Technol Fac Infrastruct Engn Dalian Peoples R China;

    Dalian Univ Technol Fac Infrastruct Engn Dalian Peoples R China;

    Dalian Univ Technol Fac Infrastruct Engn Dalian Peoples R China;

    Chinese Acad Sci Inst Appl Ecol Key Lab Pollut Ecol & Environm Engn Shenyang Peoples R China;

    Dalian Univ Technol Fac Infrastruct Engn Dalian Peoples R China;

    Chinese Acad Sci Inst Appl Ecol Key Lab Pollut Ecol & Environm Engn Shenyang Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Benthic macroinvertebrates; Cadmium; Sediment toxicity; Water quality criteria;

    机译：Benthic Macroinvertebrate;镉;沉积物毒性;水质标准;

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