Soil nematode abundance and functional group composition at a global scale
Soil nematode abundance and functional group composition at a global scale
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DOI：
10.1038/s41586-019-1418-6
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发表时间：
2019-08-08
期刊：
影响因子：
64.8
通讯作者：
Crowther, Thomas Ward
中科院分区：
文献类型：
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作者：
van den Hoogen, Johan;Geisen, Stefan;Crowther, Thomas Ward
土壤生物是陆地生物圈的重要组成部分。尽管他们的生态系统功能的重要性，目前存在的活跃的地下社区的数量，空间上明确的模型。特别是，线虫是地球上最丰富的动物，填补了土壤食物网的所有营养级。在这里，我们使用6，759个地理参考样本来生成对土壤中线虫全球丰度模式及其功能组组成的机械理解。由此产生的地图显示，4.4 +/- 0.64 x 10（20）线虫（总生物量约为0.3千兆吨）栖息在世界各地的表层土壤中，亚北极地区的丰度（占总数的38%）高于温带（24%）或热带（21%）地区。这些全球趋势的区域差异也为了解当地土壤肥力和功能模式提供了依据。这些高分辨率模型为在全球土壤地球化学模型中描述土壤生态过程迈出了第一步，并将能够预测当前和未来气候情景下的元素循环。
Soil organisms are a crucial part of the terrestrial biosphere. Despite their importance for ecosystem functioning, few quantitative, spatially explicit models of the active belowground community currently exist. In particular, nematodes are the most abundant animals on Earth, filling all trophic levels in the soil food web. Here we use 6,759 georeferenced samples to generate a mechanistic understanding of the patterns of the global abundance of nematodes in the soil and the composition of their functional groups. The resulting maps show that 4.4 +/- 0.64 x 10(20) nematodes (with a total biomass of approximately 0.3 gigatonnes) inhabit surface soils across the world, with higher abundances in sub-Arctic regions (38% of total) than in temperate (24%) or tropical (21%) regions. Regional variations in these global trends also provide insights into local patterns of soil fertility and functioning. These high-resolution models provide the first steps towards representing soil ecological processes in global biogeochemical models and will enable the prediction of elemental cycling under current and future climate scenarios.