数字农科院2.0

Synergistic effects of multiple global change drivers on terrestrial ecosystem carbon sink

文献类型： 外文期刊

作者： Tang, Shiming;Tian, Dashuan;Wang, Jinsong;Zhang, Ruiyang;Wang, Song;Song, Jian;Wan, Shiqiang;Zhang, Jinxin;Zhang, Shuang;Li, Zhaolei;Niu, Shuli

作者机构：

关键词： Global change interaction;Nitrogen addition;ElevatedCO2

期刊名称： SCIENCE OF THE TOTAL ENVIRONMENT

ISSN： 0048-9697

年卷期： 2024 年 906 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Multiple global change drivers typically co-occur in terrestrial ecosystems, usually with complex interactions on ecosystem carbon fluxes. However, how they interactively impact terrestrial carbon sinks remains unknown. Here, we synthesized 82 field experiments that studied the individual and pairwise effects among nitrogen addition (N), increased precipitation (IP), elevated CO2 (eCO2) and warming, with direct measurements of net ecosystem productivity (NEP), gross ecosystem productivity (GEP) and ecosystem respiration (ER). We found that synergistic interactions mostly occurred between pairs of global change drivers on carbon fluxes. Moreover, these interactions varied with treatment magnitude, experimental duration and background precipitation. Spe-cifically, the synergistic effect of N x IP became stronger with experimental precipitation magnitude and background rainfall. With an increasing N addition rate, N and eCO2 had weaker interactive effects on NEP. Warming and IP were more synergic to enhance NEP with higher levels of warming magnitude. However, the interactive effects of N x eCO2 on ER decreased over the experimental duration. Overall, this study provides new insights into the context-dependent occurrence of interactions among multiple global change drivers on ecosystem carbon sinks. These new findings are valuable to validate land C-cycle models with complex global change interactions and advance the next generations of future experimental design.

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