Environmental tipping points for global soil nitrogen-fixing microorganisms.

IF 4.1 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES iScience Pub Date : 2024-12-19 eCollection Date: 2025-01-17 DOI:10.1016/j.isci.2024.111634

Yueqi Hao, Hao Liu, Jiawei Li, Li Mu

引用次数: 0

Abstract

Nitrogen-fixing microorganisms (NFMs) are important components of soil N sinks and are influenced by multiple environmental factors. We established a random forest model optimized by the distributed delayed particle swarm optimization (RODDPSO) algorithm to analyze the global NFM data. Soil pH, organic carbon (OC), mean annual precipitation (MAP), altitude, and total phosphorus (TP) are factors with contributions greater than 10% to NFMs. pH, OC, and MAP are the top three factors at the global scale. The tipping points of pH and OC for the NFMs were 7.84 and 2.71%, respectively. The contribution of MAP first increased but then decreased with peak value at 1,265.65 mm. Under the scenario SSP 8.5, 12% of the NFMs increase occur in Africa in 2100; 16% and 36% of the NFMs decrease in North America and Oceania in 2100, respectively. Our work created a global NFMs map and identified the critical tipping points.

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全球土壤固氮微生物的环境临界点。

固氮微生物是土壤氮汇的重要组成部分，受多种环境因素的影响。建立了基于分布式延迟粒子群算法（RODDPSO）优化的随机森林模型，对全局NFM数据进行分析。土壤pH、有机碳（OC）、年平均降水量（MAP）、海拔高度和总磷（TP）对NFMs的贡献均大于10%。pH、OC和MAP是全球尺度上最重要的三个因子。nfm的pH和OC的临界点分别为7.84和2.71%。MAP的贡献先增大后减小，在1265.65 mm处达到最大值。在SSP 8.5情景下，到2100年，12%的非森林资本增长发生在非洲；到2100年，北美和大洋洲的nfm分别减少16%和36%。我们的工作创建了一个全球nfm地图，并确定了关键的临界点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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