2026-10-15T06:11:21Z https://www.scidb.cn/oai

10.57760/sciencedb.42336 2026-07-12T15:29:03Z

2026-07-12 Response of paddy soil microorganisms to continuous warming and their correlation with MBC: a 3-year field experiment doi:10.57760/sciencedb.42336 en Global warming exerts complex and often contrasting effects on soil microbial communities. Microbial biomass carbon (MBC) links microbial activity to carbon sequestration, yet the warming‑driven relationship between MBC and soil microbiomes remains unclear, especially in agroecosystems. Hereby, we conducted a three-year, open-field warming experiment in a paddy ecosystem to quantify changes in soil microbial communities as well as MBC, and to elucidate the relationship between them. The results showed that warming and fertilization had no significant interactive effects on the α‑diversity (Chao1 and Shannon indices) of the microbial communities, but fertilization significantly reduced the Chao1 and Shannon indices of the bacterial community (P < 0.05). Non-metric multidimensional scaling (NMDS) revealed that warming significantly altered both bacterial and fungal communities under fertilization, with stronger effects on bacteria. Meanwhile, it showed that warming treatment significantly increased MBC contents by 20.4% (P < 0.05). At the class level, warming significantly decreased Deltaproteobacteria (29.83%) and Gammaproteobacteria (25.72%~26.58%) in the bacterial community, except for Deltaproteobacteria under no‑fertilization, which showed no significant response; however, warming significantly increased Eurotiomycetes (81.5%~177.84%) in the fungal community. Correlation heatmap comprehensively quantified the association between microbial species and MBC, and the random forest analysis indicated that Acidobacteria_Gp3 in the bacterial community and Sordariomycetes in the fungal community were the key factors affecting MBC. Overall, the warming treatment had a more significant impact on shaping the bacterial community structure, while the dynamic changes in soil MBC were more sensitive to the fluctuations in the fungal community. This study revealed that warming reshaped microbial communities, enhanced diversity, increased MBC. Global warming; Microbial community; Soil microbial biomass carbon; Paddy Tingting Xu Xuzhe Deng Ning Wang Yu Jiang Ganghua Li Pengfu Hou Lihong Xue Yanfeng Ding RESTRICTED dataset Science Data Bank