Nature：全球范围内土壤线虫的丰度和功能群组成

来源：土壤观察

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瑞士苏黎世联邦理工学院综合生物学研究所Johan van den Hoogen等使用6759个地理坐标的样本，对土壤中线虫的全球丰度状态及其功能群的组成进行了机理研究。

瑞士苏黎世联邦理工学院综合生物学研究所Johan van den Hoogen等使用6759个地理坐标的样本，对土壤中线虫的全球丰度状态及其功能群的组成进行了机理研究。文章发表于Nature（IF=43.070）。来自57个单位的69位作者共同完成了本文。

Abstract

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 × 1020 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. 

土壤生物是陆地生物圈的重要组成部分。它们对生态系统的功能很重要，但目前，对土壤生物活跃种群丰度的空间明确性模型研究很少。线虫是地球上数量最多的动物，存在于土壤食物网的所有营养水平。本文使用6759个地理坐标的样本，对土壤中线虫的全球丰度状态及其功能群的组成进行了机理研究。结果表明，线虫数量大约为（4.4±0.64）×1020只（总生物量约为3亿t），分布在世界各地的表层土壤中，亚北极地区（占总生物量的38%）的线虫丰度高于温带（24%）和热带（21%）。通过这些全球趋势的区域差异，也能够了解当地的土壤肥力和功能情况。这一高分辨率模型为全球生物地球化学模型描述土壤生态过程迈出了第一步，并使得当前和未来气候情景下预测元素循环成为可能。