Title: 气候变化对海洋生态系统的影响

Abstract:Climate change affects ecological communities through its impact on the physiological performance of individuals. Present focus is on the responses of individual species under the assumption that the surrounding community remains unaffected. The population dynamic of species well inside their thermal niche is, however, also determined by competitors, preys, and predators, in addition to being influenced by temperature changes. We use a trait-based food-web model to examine how the interplay between the direct physiological effects from temperature and the interactions between populations shapes the ecological consequences of climate change for populations and entire communities. Our simulations illustrate how isolated communities deteriorate as populations go extinct when the environment moves outside their thermal niche. Open and diverse communities are able to compensate for the loss of ecosystem function by invasions. Individual populations show complex responses largely uncorrelated with the direct impact of temperature change on physiology. This is particularly evident during extinction and invasion events driven by climate change, where climatically well-adapted species may themselves be brought to extinctions by the changed food-web topology. Our results highlight that food-web dynamics may well be more important for climate change effects on species than the direct physiological impact of elevated temperatures. Consequently, the impact of climate change on specific populations is largely unpredictable, and apparently well-adapted species may be severely impacted.

报 告 人：张来 副教授 瑞典于默奥大学数学统计学院

报告时间：2016年12月8日（星期四）下午16：00~16：40

报告地点：数学科学学院38号楼报告厅

主办单位：数学科学学院

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