...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Physicochemistry or physiology: cadmium uptake and effects of salinity and osmolality in three crabs of different ecologies
【24h】

Physicochemistry or physiology: cadmium uptake and effects of salinity and osmolality in three crabs of different ecologies

机译：物理化学或生理学：三种生态不同的螃蟹对镉的吸收以及盐度和渗透压的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The effects of salinity and osmolality differences on the uptake rates of dissolved cadmium were investigated in 3 crabs of different ecologies — the euryhaline common shore crab Carcinus maenas, the extremely euryhaline Chinese mitten crab Eriocheir sinensis, and a more stenohaline crab, the velvet swimming crab Necora puber. This study tests predictions derived from the interpretations of the authors from a study of Zn uptake by the same crabs, in terms of the balance between physicochemical and counteractive physiological effects controlling trace metal uptake rates from solution. As predicted, reduced salinities caused increases in the cadmium uptake rate of E. sinensis as expected from the free metal ion model, with increased free cadmium ion availabilities in conditions of reduced chloride complexation. In the cases of C. maenas and N. puber, however, decreased salinity was associated with reduced cadmium uptake, a result interpreted in terms of a physiological response by these crabs to low salinity offsetting the physicochemical effect of increased free cadmium ion availability. This physiological response may include reductions in apparent water permeability with reduced salinities. Osmolality experiments showed that the physiological responses made by the crabs to decreases in salinity could not be explained simply by responses to changes in osmotic pressure of the medium. The interaction of physiology and physico-chemistry controls rates of trace metal uptake from solution by these ecophysiologically distinct crab species.
机译：在3种不同生态的螃蟹中研究了盐度和渗透压差异对溶解镉吸收速率的影响，这些螃蟹为：淡色普通岸蟹Carcinus maenas，极度淡淡的中华绒螯蟹Eriocheir sinensis和更柔软的淡色咸蟹，天鹅绒游泳蟹。 Necora出版社。这项研究测试了根据作者对同一只螃蟹对锌的吸收研究的解释得出的预测，这些研究涉及控制溶液中痕量金属的吸收率的理化和反作用生理效应之间的平衡。如所预测的，盐度降低导致中华绒螯蟹对镉的吸收率增加，这与游离金属离子模型所期望的一样，并且在减少氯离子络合的条件下，游离镉离子的利用率增加。然而，在C. maenas和N. puber的情况下，盐度的降低与镉的吸收减少有关，这是这些螃蟹对低盐度的生理反应所解释的结果，抵消了自由镉离子利用率增加的物理化学作用。这种生理反应可能包括盐度降低，表观水渗透率降低。渗透压实验表明，螃蟹对盐度降低的生理反应不能简单地通过对介质渗透压变化的反应来解释。生理和物理化学的相互作用控制了这些生态生理上不同的蟹类物种从溶液中吸收微量金属的速率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号