Microplastic pollution promotes soil respiration : a global-scalemeta-analysis
Zhao, Shuling (Chinese Academy of Sciences. The Research Center of Soil and Water Conservation and Ecological Environment)
Rillig, Matthias (Freie Universität Berlin. Institut of Biology)
Bing, Haijian (Chinese Academy of Sciences. Institute of Mountain Hazards and Environment)
Cui, Qingliang (Chinese Academy of Sciences. The Research Center of Soil and Water Conservation and Ecological Environment)
Qiu, Tianyi (Northwest Agriculture and Forestry University. College of Natural Resources and Environment)
Cui, Yongxing (Freie Universität Berlin. Institut of Biology)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Liu, Baiyan (Chinese Academy of Sciences. The Research Center of Soil and Water Conservation and Ecological Environment)
Bian, Shiqi (Northwest Agriculture and Forestry University. College of Natural Resources and Environment)
Monikh, Fazel Abdolahpur (University of Padua. Department of Chemical Sciences)
Chen, Jing (Renmin Hospital of Wuhan University. Department of Cardiology)
Fang, Linchuan (Chinese Academy of Sciences. The Research Center of Soil and Water Conservation and Ecological Environment)

Date:	2024
Abstract:	Microplastic (MP) pollution likely affects global soil carbon (C) dynamics, yet it remainsuncertain how and to what extent MP influences soil respiration. Here, we report on aglobal meta-analysis to determine the effects of MP pollution on the soil microbiomeand CO2 emission. We found that MP pollution significantly increased the contentsof soil organic C (SOC) (21%) and dissolved organic C (DOC) (12%), the activity offluorescein diacetate hydrolase (FDAse) (10%), and microbial biomass (17%), but ledto a decrease in microbial diversity (3%). In particular, increases in soil C componentsand microbial biomass further promote CO2 emission (25%) from soil, but with a muchhigher effect of MPs on these emissions than on soil C components and microbialbiomass. The effect could be attributed to the opposite effects of MPs on microbialbiomass vs. diversity, as soil MP accumulation recruited some functionally importantbacteria and provided additional C substrates for specific heterotrophic microorgan-isms, while inhibiting the growth of autotrophic taxa (e. g. , Chloroflexi, Cyanobacteria). This study reveals that MP pollution can increase soil CO2 emission by causing shiftsin the soil microbiome. These results underscore the potential importance of plasticpollution for terrestrial C fluxes, and thus climate feedbacks.
Grants:	Agencia Estatal de Investigación PID2022-140808NB-I00 Ministerio de Ciencia e Innovación TED2021-132627B-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2023/CLIMA-00118 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-1333
Note:	Altres ajuts: The Fundación Ramón Areces, Grant/Award Number: CIVP20A6621
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Global climate change ; Microplastics ; Soil CO2 emission ; Soil enzyme activities ; Soil microorganisms ; Soil organic C
Published in:	Global change biology, Vol. 30, issue 7 (July 2024) , art. e17415, ISSN 1365-2486

DOI: 10.1111/gcb.17415

Postprint 35 p, 1.9 MB

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