POPULATION CONSEQUENCES OF CADMIUM TOXICITY IN SOIL MICROARTHROPODS
POPULATION CONSEQUENCES OF CADMIUM TOXICITY IN SOIL MICROARTHROPODS
复制标题
DOI：
10.1016/0147-6513(89)90038-9
复制
发表时间：
1989-04-01
影响因子：
6.8
通讯作者：
DEGOEDE, RGM
中科院分区：
文献类型：
--
作者：
VANSTRAALEN, NM;SCHOBBEN, JHM;DEGOEDE, RGM
采用跳虫Orchesella cincta（L.）和甲螨Platynothrus peltifer（Koch），它们暴露于食物（绿色藻类）中不同水平的镉。实验结果与生活史信息相结合，以获得现实的估计的内在人口增长率和镉胁迫的敏感性。膳食镉暴露的慢性LC_（50）值为1.60 μ mol/g。Cincta和3.18 μ mol/g。peltifer。生长和繁殖的NOECs为0.042 μ mol/g。0.026 μ mol/g; peltifer。Cd的主要影响是，但是，在每个物种不同。不，带瓣的，镉主要影响雌性生长，对生殖没有直接影响;在P. peltifer，影响主要是在繁殖。P处理对Cd的吸收量较高。Peltiferthan in O.在前一物种中，引起锌的损失。由于其不同的生理反应镉，螨和弹尾虫也反应不同，在他们的人口增长率。螨的种群增长能力似乎是相当敏感的镉，而弹尾虫能够在一定程度上，以保持其能力的增加，尽管在个人水平上的毒性作用。这些结果可能有助于发展生态毒理学理论的人口后果的有毒行动的物种不同的生活史。土壤微型节肢动物可能是评估化学品对土壤生态系统风险的合适测试生物。
Chronic toxicity experiments were performed using the collembolanOrchesella cincta(L.) and the oribatid mitePlatynothrus peltifer(Koch), which were exposed to various levels of cadmium in the food (green algae). Experimental results were combined with life-history information to obtain realistic estimates of the intrinsic rate of population increase and its sensitivity to Cd stress. Chronic LC50 values for dietary exposure to Cd were estimated as 1.60 μmol/g forO. cinctaand 3.18 μmol/g forP. peltifer. No-observed-effect concentrations (NOECs) for growth and reproduction were 0.042 μmol/g forO. cinctaand 0.026 μmol/g forP. peltifer. The main effects of Cd were, however, different in each species. InO. cincta, Cd affected primarily female growth, without a direct effect on reproduction; inP. peltifer, the effect was primarily on reproduction. Uptake of Cd was higher inP. peltiferthan inO. cincta, and caused a loss of zinc in the former species. As a consequence of their differing physiological responses to Cd, mites and collembolans also reacted differently in their population growth rates. The capacity for population increase of mites appeared to be rather sensitive to Cd, while collembolans were able, to some extent, to maintain their capacity for increase, in spite of toxic effects at the individual level. These results may contribute to developing ecotoxicological theory for the population consequences of toxic action in species with diverging life histories. Soil microarthropods may be suitable test organisms for evaluating the risk of chemicals to the soil ecosystem.