The macroevolutionary impact of recent and imminent mammal extinctions on Madagascar.

The macroevolutionary impact of recent and imminent mammal extinctions on Madagascar.
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DOI:
10.1038/s41467-022-35215-3
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发表时间:
2023-01-10
影响因子:
16.6
通讯作者:
Valente, Luis
Valente, Luis
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Michielsen, Nathan M.;Goodman, Steven M.;Soarimalala, Voahangy;van der Geer, Alexandra A. E.;Davalos, Liliana M.;Saville, Grace, I;Upham, Nathan;Valente, Luis

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马达加斯加的许多独特物种面临灭绝的威胁。然而,在全球进化背景下,最近和潜在的灭绝的严重程度是无法量化的。在这里,我们为马达加斯加完整的非海洋哺乳动物生物群编制了系统发育数据集,并估计了灭绝、殖民和物种形成的自然速率。我们测量了在这些速率下恢复马达加斯加哺乳动物生物多样性需要多长时间,即“进化回归时间”(ERT)。在人类抵达马达加斯加时,由于 33 次殖民事件(其中 28 种是蝙蝠),马达加斯加大约有 250 种哺乳动物,但其中至少 30 种自那时以来已经灭绝。我们表明,当前受威胁物种的消失将比人类到来以来的所有物种灭绝产生更深远的长期影响。对于蝙蝠来说,从现在的多样性恢复到人类出现之前的多样性需要 160 万年(Myr),对于非飞行哺乳动物来说需要 2.9 Myr。然而,如果目前被列为受威胁的物种灭绝,蝙蝠的 ERT 会上升到 2.9 密尔,非飞行哺乳动物的 ERT 会上升到 23 密尔。我们的研究结果表明,除非立即采取保护行动,否则马达加斯加即将面临一场具有深远进化影响的灭绝浪潮。马达加斯加是生物多样性受到威胁的热点地区。在这里,作者使用新组装的数据集和岛屿生物地理学模型,估计了自人类殖民以来已经丢失了多少百万年的进化历史,并且马达加斯加哺乳动物在未来可能会进一步丢失。
Many of Madagascar’s unique species are threatened with extinction. However, the severity of recent and potential extinctions in a global evolutionary context is unquantified. Here, we compile a phylogenetic dataset for the complete non-marine mammalian biota of Madagascar and estimate natural rates of extinction, colonization, and speciation. We measure how long it would take to restore Madagascar’s mammalian biodiversity under these rates, the “evolutionary return time” (ERT). At the time of human arrival there were approximately 250 species of mammals on Madagascar, resulting from 33 colonisation events (28 by bats), but at least 30 of these species have gone extinct since then. We show that the loss of currently threatened species would have a much deeper long-term impact than all the extinctions since human arrival. A return from current to pre-human diversity would take 1.6 million years (Myr) for bats, and 2.9 Myr for non-volant mammals. However, if species currently classified as threatened go extinct, the ERT rises to 2.9 Myr for bats and 23 Myr for non-volant mammals. Our results suggest that an extinction wave with deep evolutionary impact is imminent on Madagascar unless immediate conservation actions are taken. Madagascar is a threatened biodiversity hotspot. Here, using a newly assembled dataset and island biogeography models, the authors estimate how many millions of years of evolutionary history have been lost since human colonisation and may be further lost in the future for Malagasy mammals.
DOI: 10.1126/sciadv.aat6925
发表时间: 2018-09
期刊: Science advances
影响因子: 13.6
作者:
Hansford J;Wright PC;Rasoamiaramanana A;Pérez VR;Godfrey LR;Errickson D;Thompson T;Turvey ST
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期刊: ECOGRAPHY
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发表时间: 2018-08-21
影响因子: 16.6
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DOI: 10.1016/j.quascirev.2016.01.007
发表时间: 2016-02-15
影响因子: 4
作者:
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通讯作者: Randrianasy, Jeannot