Department of Biology, University of Oxford, Oxford, UK.
Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut, USA.
Ecol Lett. 2022 Oct;25(10):2142-2155. doi: 10.1111/ele.14086. Epub 2022 Aug 27.
Recent work has demonstrated that changes in resource availability can alter a consumer's thermal performance curve (TPC). When resources decline, the optimal temperature and breadth of thermal performance also decline, leading to a greater risk of warming than predicted by static TPCs. We investigate the effect of temperature on coupled consumer-resource dynamics, focusing on the potential for changes in the consumer TPC to alter extinction risk. Coupling consumer and resource dynamics generally reduces the potential for resource decline to exacerbate the effects of warming via changes to the TPC due to a reduction in top-down control when consumers near the limits of their thermal performance curve. However, if resources are more sensitive to warming, consumer TPCs can be reshaped by declining resources, leading to increased extinction risk. Our work elucidates the role of top-down and bottom-up regulation in determining the extent to which changes in resource density alter consumer TPCs.
最近的研究表明，资源可利用性的变化会改变消费者的热性能曲线（TPC）。当资源减少时，最佳温度和热性能范围也会下降，导致比静态 TPC 预测的更高的变暖风险。我们研究了温度对消费者-资源耦合动力学的影响，重点关注消费者 TPC 的变化可能改变灭绝风险的潜力。由于消费者接近热性能曲线极限时自上而下控制的减少，耦合消费者和资源动态通常会降低资源减少通过改变 TPC 来加剧变暖影响的可能性。然而，如果资源对变暖更敏感，那么消费者 TPC 可能会被减少的资源重塑，导致灭绝风险增加。我们的工作阐明了自上而下和自下而上的调节在确定资源密度变化改变消费者 TPC 的程度方面的作用。
