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Differential responses of carbon-degrading enzyme activities to warming: implications for soil respiration

Differential responses of carbon-degrading enzyme activities to warming: implications for soil respiration

Chen, Ji ORCID: 0000-0001-7026-6312, Luo, Yiqi, García-Palacios, Pablo ORCID: 0000-0002-6367-4761, Cao, Junji, Dacal, Marina, Zhou, Xuhui ORCID: 0000-0002-2038-9901, Li, Jianwei ORCID: 0000-0002-0429-3627, Xia, Jianyang ORCID: 0000-0001-5923-6665, Niu, Shuli ORCID: 0000-0002-2394-2864, Yang, Huiyi, Shelton, Shelby, Guo, Wei and van Groenigen, Kees Jan ORCID: 0000-0002-9165-3925 (2018) Differential responses of carbon-degrading enzyme activities to warming: implications for soil respiration. Global Change Biology, 24 (10). pp. 4816-4826. ISSN 1354-1013 (Print), 1365-2486 (Online) (doi:https://doi.org/10.1111/gcb.14394)

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Abstract

Extracellular enzymes catalyze rate‐limiting steps in soil organic matter decomposi-tion, and their activities (EEAs) play a key role in determining soil respiration (SR).Both EEAs and SR are highly sensitive to temperature, but their responses to cli-mate warming remain poorly understood. Here, we present a meta‐analysis on theresponse of soil cellulase and ligninase activities and SR to warming, synthesizingdata from 56 studies. We found that warming significantly enhanced ligninase activ-ity by 21.4% but had no effect on cellulase activity. Increases in ligninase activitywere positively correlated with changes in SR, while no such relationship was foundfor cellulase. The warming response of ligninase activity was more closely related tothe responses of SR than a wide range of environmental and experimental method-ological factors. Furthermore, warming effects on ligninase activity increased withexperiment duration. These results suggest that soil microorganisms sustain long‐term increases in SR with warming by gradually increasing the degradation of therecalcitrant carbon pool.

Item Type: Article
Uncontrolled Keywords: cellulase activity, decomposition, extracellular enzyme activity, global warming, ligninaseactivity, recalcitrant carbon pool, soil microorganisms, soil respiration
Subjects: Q Science > QH Natural history > QH301 Biology
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Livelihoods & Institutions Department
Last Modified: 15 Jul 2020 10:26
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/28849

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