No longer a safe haven Many biological patterns have a latitudinal component. One long-recognized pattern is that predation rates are higher at lower latitudes. This may explain why many migratory birds travel thousands of miles from the tropics to the poles to breed. Looking across thousands of records, Kubelka et al. found that climate change seems to have altered this fundamental pattern. In shorebirds, at least, predation rates on nests are now higher in the Arctic than in the tropics. Science, this issue p. 680 Climate change has caused a reversal in patterns of shorebird nest predation rates such that Arctic birds suffer more predation. Ongoing climate change is thought to disrupt trophic relationships, with consequences for complex interspecific interactions, yet the effects of climate change on species interactions are poorly understood, and such effects have not been documented at a global scale. Using a single database of 38,191 nests from 237 populations, we found that shorebirds have experienced a worldwide increase in nest predation over the past 70 years. Historically, there existed a latitudinal gradient in nest predation, with the highest rates in the tropics; however, this pattern has been recently reversed in the Northern Hemisphere, most notably in the Arctic. This increased nest predation is consistent with climate-induced shifts in predator-prey relationships.

中文翻译：

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滨鸟的气候变化破坏了全球巢穴捕食模式

不再是避风港 许多生物模式都有纬度成分。一种长期公认的模式是低纬度地区的捕食率更高。这或许可以解释为什么许多候鸟从热带旅行数千英里到极地繁殖。Kubelka 等人查看了数千条记录。发现气候变化似乎已经改变了这种基本模式。至少对于滨鸟来说，现在北极的巢穴捕食率高于热带。科学，这个问题 p。680 气候变化导致滨鸟巢穴捕食率模式发生逆转，北极鸟类遭受更多捕食。持续的气候变化被认为会破坏营养关系，对复杂的种间相互作用产生后果，但气候变化对物种相互作用的影响知之甚少，并且这种影响尚未在全球范围内得到记录。使用包含 237 个种群的 38,191 个巢穴的单一数据库，我们发现滨鸟在过去 70 年中经历了全球范围内的巢穴捕食增加。历史上，巢穴捕食存在纬度梯度，热带地区的比率最高；然而，这种模式最近在北半球发生了逆转，尤其是在北极。这种增加的巢穴捕食与气候引起的捕食者-猎物关系的变化是一致的。热带地区发病率最高；然而，这种模式最近在北半球发生了逆转，尤其是在北极。这种增加的巢穴捕食与气候引起的捕食者-猎物关系的变化是一致的。热带地区发病率最高；然而，这种模式最近在北半球发生了逆转，尤其是在北极。这种增加的巢穴捕食与气候引起的捕食者-猎物关系的变化是一致的。