Annual changes in the Biodiversity Intactness Index in tropical and subtropical forest biomes, 2001-2012.

Annual changes in the Biodiversity Intactness Index in tropical and subtropical forest biomes, 2001-2012.
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DOI:
10.1038/s41598-021-98811-1
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发表时间:
2021-10-12
期刊:
影响因子:
4.6
通讯作者:
Purvis A
Purvis A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
De Palma A;Hoskins A;Gonzalez RE;Börger L;Newbold T;Sanchez-Ortiz K;Ferrier S;Purvis A

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很少有生物多样性指标能够以精细的空间和时间分辨率反映广义生物多样性(而不是特定类群)的状态。其中一项指标是生物多样性完整性指数(BII),它估计一个地区本地陆地物种的平均丰度与没有明显人类影响的情况下的丰度相比。我们通过结合土地利用、人口密度和道路网络的年度数据,以及这些变量如何影响植物、真菌、无脊椎动物和脊椎动物的总体丰度和组成相似性的统计模型,制作了热带和亚热带森林生物群落的分辨率为 30 角秒(赤道处大约 1 公里)的 BII 年度模型地图。在热带和亚热带生物群落中,BII在2001年至2012年间平均下降了1.9个百分点,其中81个国家平均下降,43个国家平均上升;原始林面积同期下降3.9%。我们没有发现 BII 的变化与各国同期经济增长率之间存在密切关系;然而,绘制人工林 BII 的局限性可能会阻碍我们识别这些关系的能力。这是首次在如此大的区域内估计 BII 的时间变化。
Few biodiversity indicators are available that reflect the state of broad-sense biodiversity—rather than of particular taxa—at fine spatial and temporal resolution. One such indicator, the Biodiversity Intactness Index (BII), estimates how the average abundance of the native terrestrial species in a region compares with their abundances in the absence of pronounced human impacts. We produced annual maps of modelled BII at 30-arc-second resolution (roughly 1 km at the equator) across tropical and subtropical forested biomes, by combining annual data on land use, human population density and road networks, and statistical models of how these variables affect overall abundance and compositional similarity of plants, fungi, invertebrates and vertebrates. Across tropical and subtropical biomes, BII fell by an average of 1.9 percentage points between 2001 and 2012, with 81 countries seeing an average reduction and 43 an average increase; the extent of primary forest fell by 3.9% over the same period. We did not find strong relationships between changes in BII and countries’ rates of economic growth over the same period; however, limitations in mapping BII in plantation forests may hinder our ability to identify these relationships. This is the first time temporal change in BII has been estimated across such a large region.
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