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首页> 外文期刊>Journal of Shellfish Research >RESILIENCE OF OXYGEN CONSUMPTION RATES IN THE JUVENILE BLUE CRAB CALLINECTES SAPIDUS TO FUTURE PREDICTED INCREASES IN ENVIRONMENTAL TEMPERATURE AND pCO(2) IN THE MESOHALINE CHESAPEAKE BAY
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RESILIENCE OF OXYGEN CONSUMPTION RATES IN THE JUVENILE BLUE CRAB CALLINECTES SAPIDUS TO FUTURE PREDICTED INCREASES IN ENVIRONMENTAL TEMPERATURE AND pCO(2) IN THE MESOHALINE CHESAPEAKE BAY

机译：少年蓝蟹菌氧气消耗率的抵御能力苏佩斯苏佩斯的未来预测的环境温度和PCO（2）中的预测增加（2）

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Quantifying the physiological impact of environmental stressors on living organisms is critical to predicting the response of any given species to future climate scenarios. Oxygen consumption rates (mu mol/g/min) were measured to examine the physiological response of the juvenile blue crab Callinectes sapidus from the Chesapeake Bay (Patuxent River. Maryland) to elevated temperature and dissolved carbon dioxide in water (pCO(2)) reflective of projected future climate scenarios. Treatment levels were selected to represent current conditions in the Chesapeake Bay (26 degrees C and 800 mu atm) and conditions predicted to occur by the year 2100 (31 degrees C and 8,000 mu atm). Crabs were exposed in a factorial design to these conditions throughout two successive molts (approximately 30 days). At the end of the exposure, the oxygen consumption rates of individual crabs were determined over at least a 10-h period using a flow-through respiration chamber equipped with optical oxygen electrodes. No significant effect of temperature or pCO(2) on oxygen consumption was observed, suggesting the absence of a respiratory impact of these two climate stressors on juvenile blue crabs. Oxygen consumption rates were also determined for crabs that experienced a rapid increase in temperature without prior acclimation. The oxygen consumption rate of crabs may have acclimated to increased temperature during the 30-day exposure period before respiratory measurement. This potential acclimation, combined with high individual variability, and a relatively small difference in temperature treatments are likely the cause for the lack of a statistically significant difference in mean oxygen consumption rates by temperature in the core experiment. The results of this study suggest that the blue crab may be quite resilient to future climate stressors and underscore the need for species-specific studies to quantify the effects of climate change on estuarine crustaceans.
机译：量化环境压力源对生物体的生理影响对于预测对未来的气候情景的任何特定物种的反应至关重要。测量氧气消耗率（mu mol / g / min）以检查来自切萨皮克湾（Patuxent River）的青少年蓝蟹Calloinectessapidus的生理反应，以升高水中的温度和溶解二氧化碳（PCO（2））反思预计未来的气候情景。选择治疗水平以表示Chesapeake湾（26摄氏度和800μmatm）中的当前条件，预测到2100（31摄氏度和8,000 mu ATM）发生的条件。在两次连续蜕皮（大约30天）的情况下，螃蟹在阶乘设计中暴露于这些条件。在曝光结束时，使用配备有光学氧电极的流通呼吸室在至少10-H周期内测定单个蟹的氧气消耗率。没有观察到温度或PCO（2）对氧气消耗的显着影响，表明这两个气候压力源在少年蓝蟹上没有呼吸冲击。还针对螃蟹确定氧气消耗率，其在没有先前适应的情况下经历了快速增加的螃蟹。在呼吸测量前30天的暴露期间，螃蟹的氧气消耗率可能已适应温度。这种潜在的驯化，与高个体变异性相结合，并且温度处理的相对较小的差异可能是核心实验中温度缺乏常见氧消耗率的统计上显着差异的原因。该研究的结果表明，蓝蟹可能对未来的气候压力源非常有弹性，并且强调了物种的需求，以量化气候变化对雌卤素甲壳类动物的影响。

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