表土
生物地球化学循环
风化作用
生物群落
生物地球化学
环境科学
地球科学
生态学
土壤科学
背景(考古学)
土壤碳
生态系统
土壤化学
土壤有机质
土壤水分
地质学
地球化学
古生物学
生物
作者
Raúl Ochoa‐Hueso,César Plaza,Eduardo Moreno-Jiménez,Manuel Delgado‐Baquerizo
摘要
Abstract 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.
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