The extent and predictability of the biodiversity-carbon correlation
The extent and predictability of the biodiversity-carbon correlation
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DOI：
10.1111/ele.12903
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发表时间：
2018-03-01
期刊：
影响因子：
8.8
通讯作者：
Venter, Oscar
中科院分区：
文献类型：
--
作者：
Di Marco, Moreno;Watson, James E. M.;Venter, Oscar
保护生物量碳储存以缓解气候变化对生物多样性保护有直接影响。然而，碳密度和物种丰富度之间存在正相关关系的证据却截然不同。在这里，我们测试了这种关联如何变化（1）在空间范围内，（2）作为一个函数，如何强烈的碳和物种丰富度取决于环境变量。我们发现，当从较大的范围（例如领域）移动到较窄的范围（例如生态区域）时，相关性减弱。对于生态区，当物种丰富度和碳密度作为相同环境变量（气候、土壤、海拔）的函数而变化时，就会出现正相关。在20%的热带生态区中，有机会通过直接的生物多样性共同效益来实现碳保护，而其他生态区则需要对物种和碳进行仔细规划，以避免潜在的不利结果。碳与生物多样性之间线性关系的广泛假设可能导致不希望的结果。
Protecting biomass carbon stocks to mitigate climate change has direct implications for biodiversity conservation. Yet, evidence that a positive association exists between carbon density and species richness is contrasting. Here, we test how this association varies (1) across spatial extents and (2) as a function of how strongly carbon and species richness depend on environmental variables. We found the correlation weakens when moving from larger extents, e.g. realms, to narrower extents, e.g. ecoregions. For ecoregions, a positive correlation emerges when both species richness and carbon density vary as functions of the same environmental variables (climate, soil, elevation). In 20% of tropical ecoregions, there are opportunities to pursue carbon conservation with direct biodiversity co-benefits, while other ecoregions require careful planning for both species and carbon to avoid potentially perverse outcomes. The broad assumption of a linear relationship between carbon and biodiversity can lead to undesired outcomes.