Soil element coupling is driven by ecological context and atomic mass,Ecology Letters

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Soil element coupling is driven by ecological context and atomic mass
Ecology Letters ( IF 7.6 ) Pub Date : 2020-11-30 , DOI: 10.1111/ele.13648
Raúl Ochoa‐Hueso ₁ , César Plaza ₂ , Eduardo Moreno‐Jiménez ₃ , Manuel Delgado‐Baquerizo ₄

Affiliation

The biogeochemical cycling of multiple soil elements is fundamental for life on Earth. Here, we conducted a global field survey across 16 chronosequences from contrasting biomes with soil ages ranging from centuries to millions of years. For this, we collected and analysed 435 topsoil samples (0–10 cm) from 87 locations. We showed that high levels of topsoil element coupling, defined as the average correlation among nineteen soil elements, are maintained over geological timescales globally. Cross‐biome changes in plant biodiversity, soil microbial structure, weathering, soil pH and texture, and mineral‐free unprotected organic matter content largely controlled multi‐element coupling. Moreover, elements with heavier atomic mass were naturally more decoupled and unpredictable in space than those with lighter mass. Only the coupling of carbon, nitrogen and phosphorus, which are essential to life on Earth, deviated from this predictable pattern, suggesting that this anomaly may be an undeniable fingerprint of life in terrestrial soils.

中文翻译：

土壤元素耦合受生态环境和原子质量驱动

多种土壤元素的生物地球化学循环是地球生命的基础。在这里，我们对16个时序序列进行了全球田野调查，从不同的生物群系到年龄范围从数百年到数百万年不等的生物群落。为此，我们从87个地点收集并分析了435个表土样品（0-10厘米）。我们表明，在全球地质时间尺度上，高水平的表土元素耦合被定义为19种土壤元素之间的平均相关性。植物生物多样性，土壤微生物结构，气候，土壤pH和质地以及不含矿物质的未保护有机物含量的跨生物组变化在很大程度上控制了多元素耦合。此外，原子质量较重的元素在空间上自然比质量较轻的元素更容易分离和不可预测。只有碳的耦合

更新日期：2021-01-11

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