• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American Journal of Physiology >Hot and bothered: effects of elevated Pco2 and temperature on juvenile freshwater mussels
【24h】

Hot and bothered: effects of elevated Pco2 and temperature on juvenile freshwater mussels

机译：热和困扰：PCO2升高和温度对少年淡水贻贝的影响

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

Multiple environmental stressors may interact in complex ways to exceed or diminish the impacts of individual stressors. In the present study, the interactive effects of two ecologically relevant stressors [increased temperature and partial pressure of carbon dioxide (Pco2)] were assessed for freshwater mussels, a group of organisms that are among the most sensitive and rapidly declining worldwide. The individual and combined effects of elevated temperature (22°C–34°C) and Pco2 (~230, 58,000 μatm) on juvenile Lampsilis siliquoidea were quantified over a 5- or 14-day period, during which physiological and whole animal responses were measured. Exposure to elevated temperature induced a series of physiological responses, including an increase in oxygen consumption rates following 5 days of exposure at 31°C and an increase in carbonic anhydrase (ca) and heat shock protein 70 mRNA levels following 14 days of exposure at 28°C and 34°C, respectively. Treatment with elevated Pco2 activated acid-base regulatory responses including increases in CA and Na+-K+-ATPase activity and a novel mechanism for acid-base regulation during Pco2 exposure in freshwater mussels was proposed. Thermal and CO2 stressors also interacted such that responses to the thermal stressor were diminished in mussels exposed to elevated Pco2, resulting in the greatest level of mortality. Additionally, larger mussels were more likely to survive treatment with elevated Pco2 and/or temperature. Together, exposure to elevated Pco2 may compromise the ability of juvenile freshwater mussels to respond to additional stressors, such as increased temperatures, highlighting the importance of considering not only the individual but also the interactive effects of multiple environmental stressors.
机译：多种环境压力源可以以复杂的方式互动以超过或减少个体压力源的影响。在本研究中，对淡水贻贝评估了两组生态相关的压力源的交互式效应[二氧化碳（PCO2）的增加（PCO2）]，这是全世界最敏感和迅速下降的淡水贻贝。在5-14天的时间内量化升高温度（22℃-34℃）和PCO2（〜230,58,000μATm）的个体和组合效果，在5℃或14天的时间内定量了生理和全动物反应测量。暴露于升高的温度诱导一系列生理反应，包括在31℃暴露5天后耗氧率的增加，并且在28时14天暴露后的碳酸酐酶（CA）和热休克蛋白70 mRNA水平。 °C和34°C分别。提出了用升高的PCO2活化酸碱调节反应治疗，包括CA和Na + -K + -ATP酶活性的增加，并提出了在淡水贻贝中PCO2暴露过程中的酸基调调节的新机制。热量和CO 2应激源也相互作用，使得对暴露于PCO2升高的贻贝中对热量应力源的反应减少，导致最大程度的死亡率。另外，较大的贻贝更容易在升高的​​PCO2和/或温度下存活处理。暴露于升高的PCO2可能会损害少年淡水贻贝对额外压力源的能力，例如温度提高，突出了不仅考虑个体的重要性，而且突出了多种环境压力的互动影响。

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