Beyond the pond: Terrestrial habitat use by frogs in a changing climate
Beyond the pond: Terrestrial habitat use by frogs in a changing climate
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DOI：
10.1016/j.biocon.2020.108712
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发表时间：
2020-09-01
影响因子：
5.9
通讯作者：
Manning, Adrian D.
中科院分区：
文献类型：
--
作者：
Evans, Maldwyn J.;Scheele, Benjamin C.;Manning, Adrian D.
两栖动物在当前全球生物多样性丧失的浪潮中比例过高。疾病和栖息地的丧失与许多两栖动物物种的减少有关，但据预测，两栖动物对气候变化也很敏感，特别是温度变化和水分流失。这些变化可能会严重影响青蛙对陆地栖息地的利用。我们使用的数据，从一个长期（2007-18）的规模实验在澳大利亚东南部的陆地栖息地特征和恢复处理青蛙物种的影响进行测试。我们发现物种丰富度下降，并在两个当地常见的物种（Limnodynastes tasmaniensis和Uperoleia laevigata）的出现。这些下降与最高气温高、最低气温低和降雨量少有关。粗木质残体的添加与较高的物种丰富度和L。塔斯马尼亚线虫的发生，但在降雨量减少和最高气温高的情况下，这种影响并不更大，这意味着“避难所”效应较弱。青蛙与潮湿的网站，这种关联增加了较高的最高温度。我们的研究结果增加了越来越多的证据，表明长时间的干旱对青蛙种群构成了关键威胁，而短期的干旱缓解不足以使陆地青蛙种群长期恢复。恢复工作可包括提供粗糙的木质残体，还应确保在炎热和干旱时期提供优质的水生生境，如抗旱池塘和水坝，作为短暂水生生境的补充。
Amphibians are proportionately over-represented in the current wave of global biodiversity loss. Disease and habitat loss are implicated in many amphibian species declines, but amphibians are also predicted to be sensitive to changes in climate, particularly changes in temperature and loss of moisture. These changes could severely impact frog use of terrestrial habitats. We used data from a long-term (2007-18) landscape-scale experiment in south-eastern Australia to test the effects of terrestrial habitat characteristics and restoration treatments on frog species. We found declines in species richness and in the occurrences of two locally-common species (Limnodynastes tasmaniensis and Uperoleia laevigata). These declines were associated with high maximum temperatures, low minimum temperatures and low rainfall. Coarse woody debris addition was associated with higher species richness and L. tasmaniensis occurrence, but this effect was not greater in times of reduced rainfall and high maximum temperatures, implying a weak 'refugia' effect. Frogs were positively associated with wetter sites, and this association increased with higher maximum temperatures. Our findings add to a growing body of evidence that show that prolonged periods of drought pose a key threat to frog populations and that short periods of relief from drought conditions are insufficient to allow recovery of terrestrial frog populations over the long term. Restoration efforts could include the provision of coarse woody debris and should also ensure that good quality aquatic habitat, such as drought-resistant ponds and dams, are available throughout hot and dry times as a supplement to ephemeral aquatic habitat.