地下储存场所假设的 CO 气体逸出对水蚤大型溞的影响。
Effects of a hypothetical escape of CO gas from subterranean storage sites on water flea Daphnia magna.
机构信息
UNESCO UNITWIN/WiCop, Physical Chemistry Department, Faculty of Marine and Environmental Sciences, University of Cadiz, Polígono Río San Pedro s/n, Puerto Real, 11510, Cádiz, Spain.
Department of Biology, University of Las Palmas de Gran Canaria, Tafira, Las Palmas, Spain.
出版信息
Environ Sci Pollut Res Int. 2017 Nov;24(32):25146-25155. doi: 10.1007/s11356-017-0154-4. Epub 2017 Sep 18.
The impacts of a hypothetical CO gas leak from freshwater sediments on the survival and reproduction of freshwater flea Daphnia magna were analyzed. Another objective was to assess the performance of standard toxicity testing protocols for CO-induced acidification research in freshwaters. Four pH levels (7.5, 7.0, 6.5, and 6.0) and two sediments with different contamination level were tested. The results revealed that the D. magna are susceptible to a gradual but relatively rapid CO enrichment of the water column causing a change from circumneutral to acidic conditions. Standard 48-h immobilization test with D. magna tended to underestimate the toxicity at CO-induced acidity condition. Dissolved aluminum may be implicated in the toxicity to the parental daphnids exposed. Metal outflux from sediments and behavior in elutriate have been discussed.
本研究分析了假设的 CO 气体从淡水沉积物中泄漏对淡水蚤（Daphnia magna）存活和繁殖的影响。另一个目的是评估标准毒性测试方案在 CO 诱导酸化研究中的表现。测试了四个 pH 值（7.5、7.0、6.5 和 6.0）和两种不同污染水平的沉积物。结果表明，D. magna 易受水柱中逐渐但相对快速的 CO 富集的影响，这会导致环境从中性到酸性的变化。用 D. magna 进行的标准 48 小时固定试验往往会低估 CO 诱导酸性条件下的毒性。溶解态铝可能与暴露于 CO 诱导酸性条件下的亲代水蚤的毒性有关。还讨论了从沉积物中流出的金属和在淋出物中的行为。
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