The geography of biodiversity change in marine and terrestrial assemblages
The geography of biodiversity change in marine and terrestrial assemblages
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DOI：
10.1126/science.aaw1620
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发表时间：
2019-10-18
期刊：
影响因子：
56.9
通讯作者：
Dornelas, Maria
中科院分区：
文献类型：
--
作者：
Blowes, Shane A.;Supp, Sarah R.;Dornelas, Maria
人类活动正在从根本上改变生物多样性。全球范围内的下降预测与地方范围内变化很大的趋势形成对比，表明生物多样性的变化可能是空间结构性的。在这里，我们使用来自239项研究的50，000多个生物多样性时间序列来研究物种丰富度和组成变化的空间变化，并发现生物多样性变化的明显地理差异。快速的组成变化是普遍的，海洋生物群落超过和陆地生物群落落后于总的趋势。虽然在一些海洋研究中发现了每年约20%的增加和减少趋势，但平均而言，组合丰富度没有变化。在局部尺度上，广泛的组成重组往往与丰富度变化脱钩，而生物多样性变化在海洋中最为强烈和多变。
Human activities are fundamentally altering biodiversity. Projections of declines at the global scale are contrasted by highly variable trends at local scales, suggesting that biodiversity change may be spatially structured. Here, we examined spatial variation in species richness and composition change using more than 50,000 biodiversity time series from 239 studies and found clear geographic variation in biodiversity change. Rapid compositional change is prevalent, with marine biomes exceeding and terrestrial biomes trailing the overall trend. Assemblage richness is not changing on average, although locations exhibiting increasing and decreasing trends of up to about 20% per year were found in some marine studies. At local scales, widespread compositional reorganization is most often decoupled from richness change, and biodiversity change is strongest and most variable in the oceans.