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Should I stay or should I go? Climate change effects on the future of Neotropical savannah bats

机译:我应该走还是留?气候变化对新热带大草原蝙蝠的未来影响

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摘要

Most extant species are survivors of the last climate change event 20,000 years ago. While past events took place over thousands of years, current climate change is occurring much faster, over a few decades. We modelled the potential distribution area of bat species in the Brazilian Cerrado, a Neotropical savannah, and assessed the potential impacts of climate change up to 2050 in two scenarios. First we evaluated what the impact on the distributions of bat species would be if they were unable to move to areas where climate conditions might be similar to current ones. The novelty of our paper is that, based on least-cost-path analyses, we identified potential corridors that could be managed now to mitigate potential impacts of climate change. Our results indicate that on average, in the future bat species would find similar climate conditions 281 km southeast from current regions. If bat species were not able to move to new suitable areas and were unable to adapt, then 36 species (31.6%) could lose ≥80% of their current distribution area, and five species will lose more than 98% of their distribution area in the Brazilian Cerrado. In contrast, if bat species are able to reach such areas, then the number of highly impacted species will be reduced to nine, with none of them likely to disappear from the Cerrado. We present measures that could be implemented immediately to mitigate future climate change impacts.
机译:大多数现存物种是2万年前最后一次气候变化事件的幸存者。尽管过去的事件发生了数千年,但当前的气候变化发生的速度要快几十年。我们对巴西新近热带大草原的塞拉多蝙蝠物种的潜在分布区域进行了建模,并在两种情况下评估了到2050年气候变化的潜在影响。首先,我们评估了如果蝙蝠物种无法迁徙到气候条件可能与当前相似的地区,将会对它们的分布产生什么影响。我们论文的新颖之处在于,基于最小成本路径分析,我们确定了潜在的走廊,现在可以对其进行管理以减轻气候变化的潜在影响。我们的结果表明,平均而言,未来蝙蝠物种会在当前区域东南281公里处发现类似的气候条件。如果蝙蝠种无法迁徙到新的合适区域并且无法适应,那么36种(31.6%)蝙蝠可能会失去≥80%的当前分布面积,而5种将失去超过98%的分布面积。巴西的塞拉多。相反,如果蝙蝠物种能够到达这些地区,那么受到严重影响的物种将减少到九种,而它们中的任何一种都不会从塞拉多消失。我们提出了可以立即实施以减轻未来气候变化影响的措施。

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