Impact of drought on terrestrial ecosystem C-N-P stoichiometry and microbial nutrient limitation

Hongwei Xu, Qing Qu, Jiaping Yang, Zhen Wang, Minggang Wang, Rentao Liu, Sha Xue

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1 Scopus citations

Abstract

Carbon (C), nitrogen (N), and phosphorus (P) stoichiometric traits are of critical importance to ecosystem functioning. Exploring the effects of drought on the C-N-P stoichiometric is of great significance for understanding element cycling and nutrient limitation in terrestrial ecosystems; however, it has not been uniformly and reliably concluded on a global scale. Here, based on 505 paired observational statistics, we systematically analyzed the effect of drought on terrestrial ecosystem C-N-P stoichiometry on the global scale. Drought greatly decreased the C:N ratio in soil (9.9%), enzymes (13.9%), shoots (7.9%), and roots (8.1%). Furthermore, soil microbes were limited by N, whereas plants were restricted by P under drought stress. Drought intensity and duration were significantly negatively correlated with shoot N:P and vector angle. Mean annual temperature (MAT) was negatively correlated with enzyme N:P and vector angle but had less effect on plant C:N:P stoichiometry. In conclusion, heavy drought intensity and long duration attenuated the P limitation in the shoot but enhanced the microbial N limitation.

Original languageEnglish
Article number105951
JournalSoil and Tillage Research
Volume236
DOIs
StatePublished - Feb 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 Elsevier B.V.

Funding

This work was supported by the National Natural Science Foundation of China ( 42307571 ), Forestry Ecological Engineering in Upper Reaches of Yangtze River Key Laboratory of Sichuan Province of Sichuan Agricultural University ( 202301 ), Open Fund of Ecological Security and Protection Key Laboratory of Sichuan Province of Mianyang Normal University ( ESP202302 ), and Open Fund for Key Lab. of Land Degradation and Ecological Restoration in northwestern China of Ningxia University ( LDER2023Z02 ). This work was supported by the National Natural Science Foundation of China (42307571), Forestry Ecological Engineering in Upper Reaches of Yangtze River Key Laboratory of Sichuan Province of Sichuan Agricultural University (202301), Open Fund of Ecological Security and Protection Key Laboratory of Sichuan Province of Mianyang Normal University (ESP202302), and Open Fund for Key Lab. of Land Degradation and Ecological Restoration in northwestern China of Ningxia University (LDER2023Z02).

FundersFunder number
Open Fund of Ecological Security and Protection Key Laboratory of Sichuan Province of Mianyang Normal UniversityESP202302
Sichuan Province of Sichuan Agricultural University202301
Ningxia UniversityLDER2023Z02
National Natural Science Foundation of China42307571

    Keywords

    • Climate change
    • Drought
    • Ecological stoichiometry
    • Ecosystem function
    • Meta-analysis
    • Plant-soil-microbes

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