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. 2018 Mar 28;285(1875). doi: 10.1098/rspb.2017.2650.
Oceans of the future are predicted to be more acidic and noisier, particularly along the productive coastal fringe. This study examined the independent and combined effects of short-term exposure to elevated CO and boat noise on the predator-prey interactions of a pair of common coral reef fishes ( and its predator, ). Successful capture of prey by predators was the same regardless of whether the pairs had been exposed to ambient control conditions, the addition of either playback of boat noise, elevated CO (925 µatm) or both stressors simultaneously. The kinematics of the interaction were the same for all stressor combinations and differed from the controls. The effects of CO or boat noise were the same, suggesting that their effects were substitutive in this situation. Prey reduced their perception of threat under both stressors individually and when combined, and this coincided with reduced predator attack distances and attack speeds. The lack of an additive or multiplicative effect when both stressors co-occurred was notable given the different mechanisms involved in sensory disruptions and highlights the importance of determining the combined effects of key drivers to aid in predicting community dynamics under future environmental scenarios.
未来的海洋预计会变得更加酸化和嘈杂，尤其是在生产力较高的沿海边缘地区。本研究考察了短期暴露于升高的 CO 和船只噪音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和联合影响。无论这些对是否暴露于环境对照条件、播放船只噪音、升高的 CO（925 µatm）或同时施加这两种胁迫源，捕食者成功捕获猎物的情况都是相同的。所有胁迫组合的相互作用的运动学都相同，与对照条件不同。CO 或船只噪音的影响相同，这表明在这种情况下它们的影响是可替代的。在这两种胁迫源单独作用或共同作用下，猎物减少了对威胁的感知，而捕食者的攻击距离和攻击速度也相应降低。当两种胁迫源同时存在时，没有观察到相加或相乘的效应，这表明在感官干扰涉及不同机制的情况下，这一点值得注意，这突显了确定关键驱动因素的综合影响以帮助预测未来环境情景下群落动态的重要性。
