Effects of temperature and oxygen concentration in sediment toxicity testing

被引：13
作者：
Airas, Sari [1 ]
Leppanen, Matti [1 ]
Kukkonen, Jussi V. K. [1 ]
机构：
[1] Univ Joensuu, Fac Biosci, FIN-80101 Joensuu, Finland
来源：
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2008年 / 70卷 / 03期
基金：
芬兰科学院;
关键词：
Chironomus; Lumbriculus; joint effects; emergence; feeding rate; sex ratio; temperature; O-2;
D O I：
10.1016/j.ecoenv.2007.06.004
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Joint effects of temperature and oxygen concentrations for the results of sediment toxicity tests were studied at 10 and 20 degrees C with 40% and 80% dissolved oxygen (DO) saturation. Growth, feeding rate, and reproduction of Lumbriculus variegatus (Oligochaete) and growth, emergence, and survival of Chironomus riparius (Diptera) were tested in a polluted and in a reference sediment. Both the feeding of L. variegatus and the emergence of C. riparius were significantly retarded at low temperature. Additionally, differences in the sex ratio of the emerged adults of C riparius were observed. The oxygen concentration alone did not have any significant effect on the endpoints, but significant combined effects of polluted sediment and low DO were observed on the biomass of L. variegatus. The standard sediment toxicity tests might offer only limited data for risk assessment of contaminated sediments at sites where the actual conditions largely differ from the laboratory conditions. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码：475 / 482
页数：8
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