Abstract：
Rates at which a community recovers after disturbance, or its resilience, can be accelerated by increased net primary productivity and recolonization dynamics such as recruitment. These mechanisms can vary across biogeographic gradients, such as latitude, suggesting that biogeography is likely important to predicting resilience. To test whether community resilience, informed by functional and compositional recovery, hinges on geographic location, we employed a standardized replicated experiment on marine invertebrate communities across four regions from the tropics to the subarctic zone. Communities assembled naturally on standardized substrate while experiencing distinct levels of biomass removal (no removal, low disturbance, and high disturbance), which opened space for new colonizers, thereby providing a pulse of limited resource to these communities. We then quantified functional (space occupancy and biomass) and compositional recovery from these repeated pulse disturbances across two community assembly timescales (early and late at 3 and 12 months, respectively). We documented latitudinal variation in resilience across 47° latitude, where speed of functional recovery was higher toward lower latitudes yet incomplete at late assembly in the tropics and subtropics. The degree of functional recovery did not coincide with compositional recovery, and regional differences in recruitment and growth likely contributed to functional recovery in these communities. While biogeographic variation in community resilience has been predicted, our results are among the first to examine functional and compositional recovery from disturbance in a single large-scale standardized experiment.
摘要：
社区在骚乱后恢复的速度，或者它的韧性，可以通过提高净初级生产力和重新殖民动态，如招聘来加速。这些机制可以在生物地理梯度中变化，比如纬度，这表明生物地理学可能对预测弹性很重要。为了测试社区的复原力，通过功能和成分恢复，取决于地理位置，我们对从热带到北极以下四个地区的海洋无脊椎动物群落进行了标准化的重复实验。社区在标准化基质上自然聚集，同时经历不同水平的生物质去除(无去除，低扰动,和高干扰)，为新的殖民者打开了空间，从而为这些社区提供了有限的资源。然后，我们在两个群落组装时间尺度（早期和晚期3个月和12个月，从这些重复的脉冲干扰中量化功能（空间占用和生物量）和成分恢复，分别)。我们记录了跨47°纬度的弹性的纬度变化，在热带和亚热带的组装后期，功能恢复速度向低纬度地区较高，但不完整。功能恢复程度与成分恢复不一致，招募和增长的区域差异可能有助于这些社区的功能恢复。虽然已经预测了社区复原力的生物地理变化，我们的结果是首次在单个大规模标准化实验中检查功能和成分从干扰中恢复的结果。
