Global patterns of nutrient limitation in soil microorganisms

• 成果类型: Article
• 署名作者: Cui, Yongxing; Peng, Shushi; Rillig, Matthias C.; Camenzind, Tessa; Delgado-Baquerizo, Manuel; Terrer, Cesar; Xu, Xiaofeng; Feng, Maoyuan; Wang, Mengjie; Fang, Linchuan; Zhu, Biao; Du, Enzai; Moorhead, Daryl L.; Sinsabaugh, Robert L.; Penuelas, Josep; Elser, James J.
• 署名单位: Peking University; Free University of Berlin; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS); Massachusetts Institute of Technology (MIT); California State University System; San Diego State University; Wuhan University of Technology; Peking University; Peking University; Beijing Normal University; University System of Ohio; University of Toledo; University of New Mexico; Consejo Superior de Investigaciones Cientificas (CSIC); Autonomous University of Barcelona; Centro de Investigacion Ecologica y Aplicaciones Forestales (CREAF-CERCA); University of Montana System; University of Montana; University of Montana System; University of Montana; Arizona State University; Arizona State University-Tempe; Arizona State University; Arizona State University-Tempe
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-10116
• DOI: 10.1073/pnas.2424552122
• 发表日期: 2025-05-20
• 关键词: ecoenzymatic stoichiometry; phosphorus limitation; nitrogen; carbon; acquisition; Fixation; mechanisms; lowland; forests; losses

摘要

The availability of nitrogen (N) and phosphorus (P) is essential for soil microbial activity and growth, yet global patterns of N and P limitation in soil microbial metabolism remain largely unknown. We modeled ecoenzyme stoichiometry data from 5,259 field observations of natural ecosystems to assess microbial N and P limitation in global surface soils. We found that microbial P limitation, which was especially strong at low latitudes, was more prevalent globally than microbial N limitation, which prevailed in cold environments. We also found widespread N and P colimitation in soil microorganisms in the tropics, contradicting the long- held paradigm that P, and not N, is the primary limiting nutrient at low latitudes. This colimitation could be attributable to elevated microbial N demand for the synthesis of P- acquiring enzymes under P limitation. Upscaling (0.1 x 0.1 degrees spatial resolution) suggested that soil microorganisms were with 21% of areas with N and P colimitation. As a global assessment of spatial variation in supporting microbial P acquisition at low latitudes and improve our understanding of microbial nutrient limitation on a global scale.