Bervoets L, Blust R, Verheyen R
Department of Biology University of Antwerp (UIA), Wilrijk, Belgium.
Arch Environ Contam Toxicol. 1996 Nov;31(4):502-11. doi: 10.1007/BF00212434.
The effect of temperature (5 to 25 degrees C) was studied on the uptake of cadmium and zinc by larvae of the midge Chironomus riparius, using artificial chemically defined solutions. The influence of prior acclimation of midge larvae at five temperatures on metal uptake was examined. At all acclimation temperatures metal uptake in organisms increased with increasing exposure temperature. Among the different temperature exposure groups the effect of temperature acclimation on metal uptake is rather variable and a general pattern can not be distinguished. The integration of the different temperature effects explains 69% of the total variation in cadmium uptake and 68% of the total variation in zinc uptake by midge larvae. The factor that accounts for respiration explained 59% of the cadmium uptake and 60% of the zinc uptake by midge larvae. The apparent activation energies for larval metal uptake are much higher than the activation energy for the free diffusion of the cadmium or zinc ion but close to the activation energy for respiration, showing that metal uptake by midge larvae is largely controlled by active physiological rather than by passive diffusional processes.
利用人工化学定义溶液，研究了温度（5至25摄氏度）对摇蚊（Chironomus riparius）幼虫吸收镉和锌的影响。研究了摇蚊幼虫在五个温度下预先适应对金属吸收的影响。在所有适应温度下，生物体中的金属吸收量随暴露温度的升高而增加。在不同的温度暴露组中，温度适应对金属吸收的影响变化很大，无法区分出一般模式。不同温度效应的综合解释了摇蚊幼虫镉吸收总量变化的69%和锌吸收总量变化的68%。解释呼吸作用的因素解释了摇蚊幼虫镉吸收的59%和锌吸收的60%。幼虫吸收金属的表观活化能远高于镉或锌离子自由扩散的活化能，但接近呼吸作用的活化能，这表明摇蚊幼虫吸收金属在很大程度上受主动生理过程而非被动扩散过程控制。
