Global acceleration in rates of vegetation change over the past 18,000 years
Global acceleration in rates of vegetation change over the past 18,000 years
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DOI：
10.1126/science.abg1685
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发表时间：
2021-05-21
期刊：
影响因子：
56.9
通讯作者：
Williams, John W.
中科院分区：
文献类型：
--
作者：
Mottl, Ondrej;Flantua, Suzette G. A.;Williams, John W.
在过去的18 000年里，全球植被首先由于最后一次冰消期伴随的气候变化而发生变化，其次是人类压力的增加;然而，全球对植被变化的幅度和模式知之甚少。使用1181个化石花粉序列和新开发的统计方法的汇编，我们检测到从4.6到2.9千年前开始的全球植被组成变化速率的加速，这在过去的18，000年中是前所未有的。晚全新世的变化速率等于或超过所有大陆的冰川消退速率，这表明人类对陆地生态系统的影响规模甚至超过了最后一次冰川消退的气候驱动的变化。上个世纪的生态数据集显示，生物多样性变化的加速始于数千年前。
Global vegetation over the past 18,000 years has been transformed first by the climate changes that accompanied the last deglaciation and again by increasing human pressures; however, the magnitude and patterns of rates of vegetation change are poorly understood globally. Using a compilation of 1181 fossil pollen sequences and newly developed statistical methods, we detect a worldwide acceleration in the rates of vegetation compositional change beginning between 4.6 and 2.9 thousand years ago that is globally unprecedented over the past 18,000 years in both magnitude and extent. Late Holocene rates of change equal or exceed the deglacial rates for all continents, which suggests that the scale of human effects on terrestrial ecosystems exceeds even the climate-driven transformations of the last deglaciation. The acceleration of biodiversity change demonstrated in ecological datasets from the past century began millennia ago.