Amphipod acute and chronic sediment toxicity assessment in estuarine environmental monitoring: An example from Ria de Aveiro, NW Portugal
Amphipod acute and chronic sediment toxicity assessment in estuarine environmental monitoring: An example from Ria de Aveiro, NW Portugal
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DOI：
10.1016/j.marpolbul.2005.09.029
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发表时间：
2006-01-01
影响因子：
5.8
通讯作者：
Rodrigues, AM
中科院分区：
文献类型：
--
作者：
Castro, H;Ramalheira, F;Rodrigues, AM
本文提出了一个全面的河口沉积物毒性调查，使用急性和全生命周期测试与本地物种，片脚类Corophium multiselosum。在急性试验中，成年标本暴露于144个地点的沉积物中10天。在全生命周期试验中，在实验室培养中获得的5-7天的样本在21天内暴露于来自56个地点的沉积物。考虑了三个终点：急性和慢性试验的存活率以及慢性试验的生殖力（暴露结束时每个重复的妊娠雌性动物数量）和生长（体重增加）。在急性试验中，成人生存率高的整体，几乎没有强调的地区可以在河口。这一形象并没有反映在慢性终点，特别是生长和繁殖力，这是最受影响的描述，纠正了幸存者的数量。慢性数据不能与分析的基线沉积物变量（粒度，总有机含量和氧化还原电位），这表明这些在生物反应中没有发挥作用。结果表明，分层沉积物生物评估方法，包括初步全面的生态毒理学筛选阶段，不应仅仅依赖于急性反应，虽然这些是从更简单，更快速的实验室测试程序。(c)2005爱思唯尔有限公司保留所有权利。
This paper presents a comprehensive estuarine sediment toxicity survey, using acute and full life-cycle tests with an indigenous species, the amphipod Corophium multiselosum. In the acute test, adult specimens were exposed to sediments from 144 sites for 10 days. In the full life-cycle test, 5-7 days old specimens, obtained in laboratory cultures, were exposed during 21 days to sediments from 56 sites. Three endpoints were considered: survival, for the acute and the chronic test and fecundity (number of gravid females per replicate at the end of the exposure) and growth (weight increase), for the chronic test. In the acute tests, adult survival was high overall and almost no stressed areas could be recognized in the estuary. This image was not reflected by the chronic endpoints, in particular growth and fecundity, which, corrected for the number of survivors, was the most affected descriptor. The chronic data could not be related to the baseline sediment variables analysed (grain-size, total organic content and redox potential), suggesting that these play no part in the biological responses. Results indicate that a tiered sediment bioassessment approach including an initial comprehensive ecotoxicological screening phase should not rely solely upon acute responses, although these are obtained from simpler and more rapid laboratory testing procedures. (c) 2005 Elsevier Ltd. All rights reserved.