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大型树懒因人类活动而灭绝

2025-05-23 11:41 by 图书馆员与追寻鹅妈妈

古时的树懒体型大小不等:从迷你型的攀爬树懒到巨型的地栖树懒都曾经存在于世。研究人员如今报告称,树懒体型的多样性很大程度上受其栖息地的影响,而它们数量的急剧下降很可能是受到人类活动压力不断增加的结果,而人类活动的压力也引发了大型地栖树懒的灭绝。如今的小型树栖型树懒是一个曾经多样化物种的最后残余,它们之所以能幸存下来,可能是因为它们栖息在与世隔绝的森林冠层之中,从而躲避了来自人类的直接压力。树懒的兴盛繁衍长达数千万年,其体型的多样性在更新世则臻于巅峰,不过其数量却在约 1 万 5000 年前开始剧减。这种下降与当时的气候变化并不吻合,而是与人类抵达美洲有关。有证据表明,人类的狩猎活动导致了大型陆生树懒的灭绝。

www.eurekalert.org/news-releases/1084282?language=chinese

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大型树懒因人类活动而灭绝

2025-05-23 11:41 by 图书馆员与追寻鹅妈妈

古时的树懒体型大小不等:从迷你型的攀爬树懒到巨型的地栖树懒都曾经存在于世。研究人员如今报告称,树懒体型的多样性很大程度上受其栖息地的影响,而它们数量的急剧下降很可能是受到人类活动压力不断增加的结果,而人类活动的压力也引发了大型地栖树懒的灭绝。如今的小型树栖型树懒是一个曾经多样化物种的最后残余,它们之所以能幸存下来,可能是因为它们栖息在与世隔绝的森林冠层之中,从而躲避了来自人类的直接压力。树懒的兴盛繁衍长达数千万年,其体型的多样性在更新世则臻于巅峰,不过其数量却在约 1 万 5000 年前开始剧减。这种下降与当时的气候变化并不吻合,而是与人类抵达美洲有关。有证据表明,人类的狩猎活动导致了大型陆生树懒的灭绝。

www.eurekalert.org/news-releases/1084282?language=chinese

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