Climate change drives widespread shifts in lake thermal habitat
Climate change drives widespread shifts in lake thermal habitat
复制标题
气候变化导致湖泊热生境的大范围变化
DOI：
10.1038/s41558-021-01060-3
复制
发表时间：
2021-06-03
影响因子：
30.7
通讯作者：
Adrian, Rita
中科院分区：
文献类型：
--
作者：
Kraemer, Benjamin M.;Pilla, Rachel M.;Adrian, Rita
全球湖面正在变暖，引发了人们对湖泊生物对热栖息地变化的反应的担忧。物种可能会通过改变季节性或深度来跟踪合适的热栖息地来科普温度升高，但这些反应可能会受到生态相互作用，生活史或有限资源的限制。在这里，我们使用来自139个湖泊的3200万个温度测量值来量化热栖息地的变化（非重叠百分比），并评估这种变化是如何因潜在的栖息地限制而加剧的。长期温度变化导致基线（1978-1995）和最近（1996-2013）时间段的热栖息地之间平均6.2%的非重叠，当栖息地受到季节和深度的限制时，非重叠平均增加到19.4%。与其他纬度的湖泊相比，热带湖泊表现出更高的热非重叠。湖泊的热生境变化与那些有许多特有物种的湖泊相吻合，这表明保护行动应该考虑热生境的变化，以保护湖泊的生物多样性。作者使用来自139个全球湖泊的测量数据，证明了湖泊长期的热生境变化是如何加剧物种的季节性和深度相关的限制。它们进一步揭示了热带湖泊以及具有高度生物多样性和特有性的湖泊的变化更大。
Lake surfaces are warming worldwide, raising concerns about lake organism responses to thermal habitat changes. Species may cope with temperature increases by shifting their seasonality or their depth to track suitable thermal habitats, but these responses may be constrained by ecological interactions, life histories or limiting resources. Here we use 32 million temperature measurements from 139 lakes to quantify thermal habitat change (percentage of non-overlap) and assess how this change is exacerbated by potential habitat constraints. Long-term temperature change resulted in an average 6.2% non-overlap between thermal habitats in baseline (1978-1995) and recent (1996-2013) time periods, with non-overlap increasing to 19.4% on average when habitats were restricted by season and depth. Tropical lakes exhibited substantially higher thermal non-overlap compared with lakes at other latitudes. Lakes with high thermal habitat change coincided with those having numerous endemic species, suggesting that conservation actions should consider thermal habitat change to preserve lake biodiversity.Using measurements from 139 global lakes, the authors demonstrate how long-term thermal habitat change in lakes is exacerbated by species' seasonal and depth-related constraints. They further reveal higher change in tropical lakes, and those with high biodiversity and endemism.