Allan Bridie J M, Domenici Paolo, Watson Sue Ann, Munday Philip L, McCormick Mark I
ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia
Department of Marine Biology and Aquaculture, College of Science and Engineering, James Cook University, Townsville, Queensland 4811, Australia.
Proc Biol Sci. 2017 Jun 28;284(1857). doi: 10.1098/rspb.2017.0784.
Ocean acidification and warming, driven by anthropogenic CO emissions, are considered to be among the greatest threats facing marine organisms. While each stressor in isolation has been studied extensively, there has been less focus on their combined effects, which could impact key ecological processes. We tested the independent and combined effects of short-term exposure to elevated CO and temperature on the predator-prey interactions of a common pair of coral reef fishes ( and its predator, ). We found that predator success increased following independent exposure to high temperature and elevated CO Overall, high temperature had an overwhelming effect on the escape behaviour of the prey compared with the combined exposure to elevated CO and high temperature or the independent effect of elevated CO Exposure to high temperatures led to an increase in attack and predation rates. By contrast, we observed little influence of elevated CO on the behaviour of the predator, suggesting that the attack behaviour of was robust to this environmental change. This is the first study to address how the kinematics and swimming performance at the basis of predator-prey interactions may change in response to concurrent exposure to elevated CO and high temperatures and represents an important step to forecasting the responses of interacting species to climate change.
由人为碳排放驱动的海洋酸化和变暖被认为是海洋生物面临的最大威胁之一。虽然对每个单独的压力源都进行了广泛研究，但对它们的综合影响关注较少，而这种综合影响可能会影响关键的生态过程。我们测试了短期暴露于升高的二氧化碳浓度和温度对一对常见珊瑚礁鱼类（及其捕食者）的捕食者 - 猎物相互作用的独立影响和综合影响。我们发现，在独立暴露于高温和升高的二氧化碳浓度后，捕食成功率增加。总体而言，与同时暴露于升高的二氧化碳浓度和高温或升高的二氧化碳浓度的独立影响相比，高温对猎物的逃逸行为具有压倒性影响。暴露于高温导致攻击和捕食率增加。相比之下，我们观察到升高的二氧化碳浓度对捕食者的行为影响很小，这表明[捕食者名称]的攻击行为对这种环境变化具有抗性。这是第一项研究在捕食者 - 猎物相互作用基础上的运动学和游泳性能如何响应同时暴露于升高的二氧化碳浓度和高温而变化的研究，代表了预测相互作用物种对气候变化响应的重要一步。
