Effects of land use and soil properties on taxon richness and abundance of soil assemblages
Effects of land use and soil properties on taxon richness and abundance of soil assemblages
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DOI：
10.1111/ejss.13430
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发表时间：
2023-11
影响因子：
4.2
通讯作者：
Victoria J Burton;A. Baselga;A. Palma;Helen R. P. Phillips;Christian Mulder;Paul Eggleton;Andy Purvis
中科院分区：
文献类型：
--
作者：
Victoria J Burton;A. Baselga;A. Palma;Helen R. P. Phillips;Christian Mulder;Paul Eggleton;Andy Purvis
土地利用变化和栖息地退化是世界各地地上生物多样性的最大驱动因素之一，但它们对土壤生物多样性的影响却鲜为人知，尽管土壤生物在发展土壤结构、养分循环和水分排放方面非常重要。结合对作为预测项目一部分的土壤组合的生物多样性数据的全球汇编和关于土壤特性的全球数据，我们模拟了土壤生物的分类群丰富度和总丰度如何对土地利用做出反应。我们还估计了全球生物多样性完整性指数(BII)--与受影响最小的基线相比，土壤生物多样性的平均丰度和组成相似性。这是第一次计算土壤生物多样性指数。与未受干扰的植被相比，除草地外，所有土地利用的土壤有机质总丰度和类群丰富度都有所降低。土壤特性对土壤生物群的响应起到了中介作用，但在不同的土地利用中并不是一致的。全球农田土壤BII平均只有原来的三分之一。然而，在放牧地，这种下降没有那么严重。次生植被的BII随年龄的变化而变化，生长较年轻的地点表现出比成熟植被低的BII。我们的结论是，土地利用的变化减少了全球土壤生物多样性，这进一步支持了在使用全球模型估计生物多样性状况时应明确考虑土壤生物群的命题。
Land‐use change and habitat degradation are among the biggest drivers of aboveground biodiversity worldwide but their effects on soil biodiversity are less well known, despite the importance of soil organisms in developing soil structure, nutrient cycling and water drainage. Combining a global compilation of biodiversity data from soil assemblages collated as part of the PREDICTS project with global data on soil characteristics, we modelled how taxon richness and total abundance of soil organisms have responded to land use. We also estimated the global Biodiversity Intactness Index (BII)—the average abundance and compositional similarity of taxa that remain in an area, compared to a minimally impacted baseline, for soil biodiversity. This is the first time the BII has been calculated for soil biodiversity. Relative to undisturbed vegetation, soil organism total abundance and taxon richness were reduced in all land uses except pasture. Soil properties mediated the response of soil biota, but not in a consistent way across land uses. The global soil BII in cropland is, on average, a third of that originally present. However, in grazed sites the decline is less severe. The BII of secondary vegetation depends on age, with sites with younger growth showing a lower BII than mature vegetation. We conclude that land‐use change has reduced local soil biodiversity worldwide, and this further supports the proposition that soil biota should be considered explicitly when using global models to estimate the state of biodiversity.