Drought effects on nitrogen and phosphorus releases from litter vary between arid and humid areas: A meta-analysis

IF 5.2 2区农林科学 Q1 SOIL SCIENCE

Pedosphere Pub Date : 2025-02-01 DOI:10.1016/j.pedsph.2024.03.003

Yanyu JIANG , Fuzhong WU , Qiuxia WU , Siqi WU , Jingjing ZHU , Xiangyin NI

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引用次数: 0

Abstract

Climate warming has intensified the global hydrological cycle, amplifying the differences in precipitation and soil moisture between arid and humid areas. Such a change under regional drought may alter nitrogen (N) and phosphorus (P) releases during litter decomposition in terrestrial ecosystems, but how these biogeochemical processes respond to drought differently between arid and humid areas remains unclear. Here, we compiled 259 and 138 paired observations (with and without drought conditions) to assess the global variations in the drought effects on N and P releases during litter decomposition between arid (aridity index < 0.5) and humid (aridity index > 0.5) areas. Litter N release increased under drought in both arid (0.35%) and humid (3.62%) areas, and P release decreased by 7.32% in arid areas but increased by 2.22% in humid areas under drought. These changes in N and P releases from decomposing litter were positively correlated with drought duration in arid areas, dependent on microclimate, edaphic factors, and litter quality. Our findings highlight the contrasting effects of drought on litter N and P releases between arid and humid ecosystems, and this differential influence will greatly improve our capability to evaluate and forecast nutrient cycling during litter decomposition under different precipitation patterns.

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干旱对枯落物氮磷释放的影响在干旱和湿润地区有所不同

气候变暖加剧了全球水文循环，扩大了干旱和潮湿地区之间降水和土壤湿度的差异。这种变化可能会改变陆地生态系统凋落物分解过程中氮和磷的释放，但这些生物地球化学过程如何在干旱和潮湿地区对干旱做出不同的响应尚不清楚。在此，我们收集了259和138对观测数据（有和没有干旱条件），以评估干旱对凋落物分解过程中N和P释放的全球变化。0.5)和潮湿(干燥指数>；0.5)地区。干旱条件下，干旱区和湿润区凋落物N释放量均增加（0.35%），P释放量减少（7.32%），湿润区增加（2.22%）。这些变化与干旱区干旱持续时间呈正相关，取决于小气候、土壤因子和凋落物质量。我们的研究结果强调了干旱对干旱和湿润生态系统凋落物N和P释放的差异影响，这种差异影响将极大地提高我们评估和预测不同降水模式下凋落物分解过程中养分循环的能力。

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来源期刊

Pedosphere 环境科学-土壤科学

CiteScore

11.70

自引率

1.80%

发文量

147

审稿时长

5.0 months

期刊介绍： PEDOSPHERE—a peer-reviewed international journal published bimonthly in English—welcomes submissions from scientists around the world under a broad scope of topics relevant to timely, high quality original research findings, especially up-to-date achievements and advances in the entire field of soil science studies dealing with environmental science, ecology, agriculture, bioscience, geoscience, forestry, etc. It publishes mainly original research articles as well as some reviews, mini reviews, short communications and special issues.