From unusual suspect to serial killer: Cyanotoxins boosted by climate change may jeopardize megafauna.
From unusual suspect to serial killer: Cyanotoxins boosted by climate change may jeopardize megafauna.
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DOI：
10.1016/j.xinn.2021.100092
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发表时间：
2021-05-28
期刊：
影响因子：
--
通讯作者：
Xie P
中科院分区：
文献类型：
--
作者：
Wang H;Xu C;Liu Y;Jeppesen E;Svenning JC;Wu J;Zhang W;Zhou T;Wang P;Nangombe S;Ma J;Duan H;Fang J;Xie P
最近在博茨瓦纳发生的330多头非洲象大规模死亡事件被归因于蓝藻产生的生物毒素；然而，缺乏科学证据证明这一点。在这里，通过综合多个来源的数据，我们表明，在过去的几十年里，南部非洲普遍肥厚的水域导致了极高的风险和对该地区野生动物的频繁接触，这是哺乳动物物种丰富的一个热点。极端炎热和干燥的气候很可能是最近以及史前大规模死亡事件的主要导火索。由于这种极端气候预计在不久的将来将在南部非洲变得更加频繁，类似的悲剧可能会发生，使非洲大型动物物种，特别是那些已经濒临灭绝的物种面临灭绝的危险。此外，气候变化放大的氰毒素中毒可能会对人类社会产生意想不到的连锁影响。从这个角度来看，世界上最大的陆生哺乳动物物种的悲惨大规模死亡是南部非洲未来环境灾难的一个令人震惊的早期预警信号。我们建议进行系统、定量的氰毒素风险评估，并毫不犹豫地采取预防行动减轻风险，以确保该区域内大型动物和人类社会的健康和可持续性。氰毒素是博茨瓦纳大象大量死亡的最有可能的原因。非洲哺乳动物物种热点地区面临着越来越大的氰毒素中毒风险。这一悲惨事件为未来的灾难敲响了警钟。强烈建议在南部非洲对氰基毒素风险进行系统评估。
The recent mass mortality event of more than 330 African elephants in Botswana has been attributed to biotoxins produced by cyanobacteria; however, scientific evidence for this is lacking. Here, by synthesizing multiple sources of data, we show that, during the past decades, the widespread hypertrophic waters in Southern Africa have entailed an extremely high risk and frequent exposure of cyanotoxins to the wildlife within this area, which functions as a hotspot of mammal species richness. The hot and dry climatic extremes have most likely acted as the primary trigger of the recent and perhaps also of prehistoric mass mortality events. As such climate extremes are projected to become more frequent in Southern Africa in the near future, there is a risk that similar tragedies may take place, rendering African megafauna species, especially those that are already endangered, in risk of extinction. Moreover, cyanotoxin poisoning amplified by climate change may have unexpected cascading effects on human societies. Seen within this perspective, the tragic mass death of the world's largest terrestrial mammal species serves as an alarming early warning signal of future environmental catastrophes in Southern Africa. We suggest that systematic, quantitative cyanotoxin risk assessments are made and precautionary actions to mitigate the risks are taken without hesitation to ensure the health and sustainability of the megafauna and human societies within the region. Cyanotoxin is the most likely cause for the massive death of elephants in Botswana. Mammal species hotspot in Africa is under increasing risk of cyanotoxin poisoning. This tragic event serves as an alarming early warning signal of future catastrophes. Systematic assessments on cyanotoxin risk are strongly suggested in Southern Africa.
全球变暖稳定在 1.5 摄氏度和 2 摄氏度情景下，非洲出现破纪录的极端气候
影响因子：
30.7
作者：
Nangombe, Shingirai;Zhou, Tianjun;Li, Donghuan
通讯作者：
Li, Donghuan
影响因子：
9.2
作者：
Schlossberg, Scott;Chase, Michael J.;Sutcliffe, Robert
通讯作者：
Sutcliffe, Robert
影响因子：
12.8
作者：
Paerl, Hans W.;Paul, Valerie J.
通讯作者：
Paul, Valerie J.