Kammenga J E, Van Gestel C A, Bakker J
Department of Nematology, Wageningen Agricultural University, The Netherlands.
Arch Environ Contam Toxicol. 1994 Jul;27(1):88-94. doi: 10.1007/BF00203892.
The variation of acute toxicity data among nematode species belonging to different taxonomic and ecological groups was investigated. Twelve different nematode species were extracted from the soil and directly exposed to cadmium and pentachlorophenol. LC50-values were estimated after 24, 48, 72, and 96 h of exposure in aqueous solutions. The species exhibited large differences in sensitivity. LC50-values (72 h) for pentachlorophenol ranged from 0.5 to more than 34.5 mumol/L and for cadmium from 29 to more than 800 mumol/L. These toxicity data could be described by a log-logistic distribution function. LC50-values for cadmium were not correlated with those for pentachlorophenol. Species of the subphylum Secernentia were less sensitive to pentachlorophenol than species of the subphylum Penetrantia, while no differences were observed for cadmium. In addition, no relationship was found between toxicity data and life-history strategies. Slow colonizers (K-strategists, sensu lato) were not more sensitive to cadmium and pentachlorophenol than opportunistic species (r-strategists, sensu lato). Nematodes appeared to be as sensitive to pentachlorophenol as other soil invertebrates. Nematodes were generally tolerant to cadmium.
研究了不同分类和生态组的线虫物种之间急性毒性数据的差异。从土壤中提取了12种不同的线虫物种，并将它们直接暴露于镉和五氯苯酚中。在水溶液中暴露24、48、72和96小时后，估计LC50值。这些物种在敏感性上表现出很大差异。五氯苯酚的LC50值（72小时）范围为0.5至超过34.5μmol/L，镉的LC50值范围为29至超过800μmol/L。这些毒性数据可用对数逻辑分布函数来描述。镉的LC50值与五氯苯酚的LC50值不相关。尾感器亚纲的物种对五氯苯酚的敏感性低于刺嘴亚纲的物种，而对于镉则未观察到差异。此外，在毒性数据和生活史策略之间未发现相关性。慢殖者（广义的K策略者）对镉和五氯苯酚的敏感性并不比机会主义物种（广义的r策略者）更高。线虫对五氯苯酚的敏感性似乎与其他土壤无脊椎动物相同。线虫通常对镉具有耐受性。
