Global distribution pattern of soil phosphorus‐cycling microbes under the influence of human activities,Global Change Biology

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Global distribution pattern of soil phosphorus‐cycling microbes under the influence of human activities
Global Change Biology ( IF 10.8 ) Pub Date : 2024-08-13 , DOI: 10.1111/gcb.17477
Jichen Wang _{1,

2} , Yong-Guan Zhu _{1,

2} , Yuan Ge _{1,

2}

Affiliation

Human activities have profoundly altered the Earth's phosphorus (P) cycling process and its associated microbial communities, yet their global distribution pattern and response to human influences remain unclear. Here, we estimated the abundances of P‐cycling genes from 3321 global soil metagenomic samples and mapped the global distribution of five key P‐cycling processes, that is, organic phosphoester hydrolysis, inorganic phosphorus solubilization, two‐component system, phosphotransferase system, and transporters. Structural equation modeling and random forest analysis were employed to assess the impact of anthropogenic and environmental factors on the abundance of P‐cycling genes. Our findings suggest that although less significant than the climate and soil profile, human‐related factors, such as economic activities and population, are important drivers for the variations in P‐cycling gene abundance. Notably, the gene abundances were increased parallel to the extent of human intervention, but generally at low and moderate levels of human activities. Furthermore, we identified critical genera, such as Pseudomonas and Lysobacter, which were sensitive to the changes in human activities. This study provides insights into the responses of P‐cycling microbes to human activities at a global scale, enhancing our understanding of soil microbial P cycling and underscoring the importance of sustainable human activities in the Earth's biogeochemical cycle.

中文翻译：

人类活动影响下土壤磷循环微生物的全球分布格局

人类活动深刻改变了地球磷（P）循环过程及其相关微生物群落，但它们的全球分布模式和对人类影响的反应仍不清楚。在这里，我们估计了3321个全球土壤宏基因组样本中磷循环基因的丰度，并绘制了五个关键磷循环过程的全球分布图，即有机磷酸酯水解、无机磷溶解、双组分系统、磷酸转移酶系统和运输者。采用结构方程模型和随机森林分析来评估人为和环境因素对 P 循环基因丰度的影响。我们的研究结果表明，尽管经济活动和人口等人类相关因素不如气候和土壤剖面重要，但它们是磷循环基因丰度变化的重要驱动因素。值得注意的是，基因丰度的增加与人类干预的程度平行，但通常是在人类活动的中低水平下。此外，我们还确定了关键属，例如假单胞菌属和溶菌属，对人类活动的变化很敏感。这项研究提供了关于全球范围内磷循环微生物对人类活动的反应的见解，增强了我们对土壤微生物磷循环的理解，并强调了可持续人类活动在地球生物地球化学循环中的重要性。

更新日期：2024-08-13

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