Differential responses of litter decomposition to warming, elevated CO 2 , and changed precipitation regime
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Differential responses of litter decomposition to warming, elevated CO2, and changed precipitation regime Qiqian Wu & Kai Yue & Xingchang Wang & Yuandan Ma & Yan Li
Received: 22 April 2020 / Accepted: 10 August 2020 # Springer Nature Switzerland AG 2020
Abstract Background and aims Litter decomposition is a fundamental process of biogeochemical cycles and particularly sensitive to global change. However, the overall effects of warming, elevated carbon dioxide and changed precipitation regime on litter decomposition are not well studied. Methods To assess the effects of these three common global change factors on litter decomposition, we performed a meta-analysis using 366 pairwise observations from 103 published articles. We quantified the responses of litter decomposition rate to the effects of
Responsible Editor: Jeffrey Walck Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04675-1) contains supplementary material, which is available to authorized users. Q. Wu (*) : Y. Ma : Y. Li (*) State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin’an 311300, China e-mail: [email protected] e-mail: [email protected] K. Yue Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, 350007 Fuzhou, China
warming, elevated CO2, and changed precipitation regime (increased and decreased). Results At the global scale, warming and precipitation addition significantly stimulated litter decomposition rate by an average of 4.20% and 11.72%, respectively. In contrast, elevated CO2 and precipitation removal showed significant negative effects on litter decomposition rate (-2.99% and − 12.60%). In addition, study type, plant functional traits, and climate were consistent moderators. These results indicate that warming, elevated CO2, and changed precipitation regime have significantly affected litter decomposition, but the direction and magnitude of the effects of different factors varied, and were also differently mediated by moderator variables. Conclusions Global cycles of carbon and nutrients via the litter decomposition process can be substantially affected by global change. However, the combined effects of these global change factors on litter decomposition and the different effects between the arid and humid areas cannot be addressed due to the lack of data, indicating the need of more focus on multi-factor manipulative experiments in a wider range of study sites. Keywords Decomposition . Carbon cycle . Global change . Meta-analysis . Systematic review
Introduction X. Wang Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, 150040 Harbin, China
Litter decomposition determines carbon, nutrients and energy cycling within and among ecosystems (Berg and McClaugherty 2014), and acts as a source of feedback to
Plant Soil
global change by influencing the produ
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