Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: April 30, 2025

Soil bacteria play a pivotal role in regulating multifaceted functions of terrestrial ecosystems. Unraveling the succession bacterial communities and feedback mechanism on soil organic carbon (SOC) dynamics help embed ecology microbiome into C cycling model. However, how wetland restoration drives community assembly species association to regulate microbial metabolism remains unclear. Here, we investigated diversity, structure co-occurrence network, enzyme activities SOC decomposition restored wetlands for one, three, four years from paddy fields Northeast China. Wetland three increased taxonomic (richness) phylogenetic diversities by 2.39–3.96% 2.13–3.02%, respectively, relative contribution nestedness dissimilarity, indicating richness changed structure. decreased index aerobic Firmicutes 5.04–5.74% due stronger anaerobic condition characterized Fe 2+ /Fe 3+ 0.20 0.64. Besides, network complexity (characterized node number 2.51%, edge 9.62%, positive/negative 6.37%, average degree 5.74% centralization 6.34%). Robustness with increase duration, while vulnerability that stability communities. These results might be because induced decrease Bacilli keystone module, thereby reducing positive within module. Decreased module turn weakened decreasing hydrolase 7.49 5.37 mmol kg −1 h oxidase 627 411 , leading rate 1.39 1.08 g during restoration. Overall, our suggested although after agricultural abandonment it Bacilli-dominated under condition, which decomposition.

Language: Английский