Soil carbon pools and microbial network stability depletion associated with wetland conversion into aquaculture ponds in Southeast China
Hou, Ning (Fujian Normal University)
Zeng, Qingsong (Fujian Normal University)
Wang, Weiqi (Fujian Normal University)
Zheng, Yi (Fujian Normal University)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Xue, Katherine (The University of Sydney. Sydney Institute of Agriculture)
Zeng, Fanjiang (Chinese Academy of Sciences. Institute of Ecology and Geography)
Tariq, Akash (Chinese Academy of Sciences. Institute of Ecology and Geography)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Títol variant:	Mangrove wetland recovery enhances soil carbon sequestration capacity of soil aggregates and microbial network stability in southeastern China
Data:	2024
Resum:	Wetlands, which are ecosystems with the highest soil surface carbon density, have been severely degraded and replaced by artificial reclamation for fish and shrimp ponds in recent years. This transformation is causing intricate shifts in soil carbon pools and microbial stability. In this study, we examined natural wetlands and reclaimed aquaculture ponds in Southeast China to analyze the structure and network stability of soil microbial communities following the reclamation of estuarine wetlands and to elucidate the microbial-mediated mechanisms for regulating soil organic carbon (SOC). The aquaculture ponds presented significantly less average SOC content than the natural wetlands (p < 0. 05). ACE, Chao1, and Shannon's indices of bacteria and fungi were decreased in aquaculture ponds. Less numbers of nodes and edge links in the co-occurrence network of soil fungi and bacteria in aquaculture ponds. This suggests reduced correlation and stability within the microbial network of aquaculture ponds. Decomposers in soil fungi (e. g. Dung Saprotroph) reduced. Reduced proportions of key phyla Ascomycota, Basidiomycota and Rozellomycota in the soil fungal network. Reduced proportions of key phyla Proteobacteria, Chloroflexi and Desulfobacterota in the soil bacterial network. In conclusion, our results suggest that converting wetland paddocks to intensive aquaculture ponds results in carbon pool loss and reduces soil microbial network stability. The results highlight the importance of protecting or moderately restoring mangrove wetlands along the coast of southeastern China. It is also predicted that such measures may enhance the storage capacity of soil carbon pools and improve the stability of carbon sequestration by soil microorganisms, thus offering a potential solution for mitigating global climate change.
Ajuts:	Agencia Estatal de Investigación PID2020-115770RB-I00 Agencia Estatal de Investigación TED2021-132627B-I00 Agencia Estatal de Investigación PID2022-140808NB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-1333
Nota:	Altres ajuts: Fundación Ramón Areces grant CIVP20A6621
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Land use change ; Aquaculture ponds ; Mangroves ; Soil aggregates ; Microbial networks ; Carbon sequestration
Publicat a:	Science of the total environment, Vol. 954 (December 2024) , art. 176492, ISSN 1879-1026

DOI: 10.1016/j.scitotenv.2024.176492

Disponible a partir de: 2026-12-31 Postprint

Disponible a partir de: 2026-12-31 Supplementary material

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