Threats of global warming to the world's freshwater fishes.
Threats of global warming to the world's freshwater fishes.
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DOI：
10.1038/s41467-021-21655-w
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发表时间：
2021-03-15
影响因子：
16.6
通讯作者：
Schipper AM
中科院分区：
文献类型：
--
作者：
Barbarossa V;Bosmans J;Wanders N;King H;Bierkens MFP;Huijbregts MAJ;Schipper AM
气候变化对全球生物多样性构成重大威胁，但淡水鱼类在气候变化评估中基本上被忽视。在这里，我们评估了未来流量和水温极端对约11，500种河流鱼类的威胁。在全球变暖3.2 °C的情况下（在现任政府承诺2030年后不再进一步减排），36%的物种将有超过一半的现有地理范围暴露在超出当前水平的极端气候中。热带和亚干旱地区的威胁最大，最高水温的上升比极端流量的变化更具威胁性。相比之下，9%的物种预计在2 °C变暖的世界中有一半以上的现有地理范围受到威胁，如果变暖限制在1.5 °C，则进一步减少到4%。我们的研究结果强调，如果要保护淡水生物多样性，就需要加强（国际）国家对限制全球变暖的承诺。气候变化是对全球生物多样性的威胁，但对淡水鱼类的潜在影响尚未得到很好的研究。在这里，作者模拟了未来的水流和水温极端情况，并预测水温的升高尤其会对淡水鱼类构成严重威胁。
Climate change poses a significant threat to global biodiversity, but freshwater fishes have been largely ignored in climate change assessments. Here, we assess threats of future flow and water temperature extremes to ~11,500 riverine fish species. In a 3.2 °C warmer world (no further emission cuts after current governments’ pledges for 2030), 36% of the species have over half of their present-day geographic range exposed to climatic extremes beyond current levels. Threats are largest in tropical and sub-arid regions and increases in maximum water temperature are more threatening than changes in flow extremes. In comparison, 9% of the species are projected to have more than half of their present-day geographic range threatened in a 2 °C warmer world, which further reduces to 4% of the species if warming is limited to 1.5 °C. Our results highlight the need to intensify (inter)national commitments to limit global warming if freshwater biodiversity is to be safeguarded. Climate change is a threat to global biodiversity, but the potential effects on freshwater fishes have not been well studied. Here the authors model future flow and water temperature extremes and predict that increases in water temperature in particular will pose serious threats to freshwater fishes
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