Drought in a warmer, CO 2 -rich climate restricts grassland water use and soil water mixing

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-01-16 DOI:10.1126/science.ado0734

Jesse Radolinski, Matevz Vremec, Herbert Wachter, Steffen Birk, Nicolas Brüggemann, Markus Herndl, Ansgar Kahmen, Daniel B. Nelson, Angelika Kübert, Andreas Schaumberger, Christine Stumpp, Maud Tissink, Christiane Werner, Michael Bahn

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引用次数: 0

Abstract

Soil water sustains terrestrial life, yet its fate is uncertain under a changing climate. We conducted a deuterium labeling experiment to determine whether elevated atmospheric carbon dioxide (CO 2 ), warming, and drought impact soil water storage and transport in a temperate grassland. Elevated CO 2 created a wetter rootzone compared with ambient conditions, whereas warming decreased soil moisture. Soil water remained well mixed in all global change treatments except for summer drought combined with warming and elevated CO 2 . These combined treatments caused the grassland to conserve water and restricted soil water flow to large, rapidly draining pores without mixing with small, slowly draining pores. Our results suggest that drought in a warmer, more CO 2 -rich climate can severely alter grassland ecohydrology by constraining postdrought soil water flow and grassland water use.

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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