TY - JOUR

T1 - Deciphering soil environmental regulation on reassembly of the soil bacterial community during wetland restoration

AU - Qin, Lei

AU - Ni, Bingbo

AU - Zou, Yuanchun

AU - Freeman, Chris

AU - Peng, Xiaojun

AU - Yang, Liang

AU - Wang, Guodong

AU - Jiang, Ming

N1 - Copyright © 2024 Elsevier B.V. All rights reserved.

PY - 2024/12/1

Y1 - 2024/12/1

N2 - Soil bacteria are vital to regulate biogeochemical processes in wetlands, however, little is known about the patterns and mechanisms of soil bacterial re-organization during wetland restoration. Here, we used a space-for-time substitution approach and examined the ecological processes that drive soil bacterial assembly from cultivated to restored to natural wetlands. Results showed a decrease of soil bacterial α diversity and increase of bacterial community similarity and bacterial interaction (cooperation vs. competition) with years of restoration, which was dominantly influenced by deterministic processes. Identified bacterial keystone taxa (e.g. Variibacter, Acidibacter) with nutrient metabolism capacity exerted strong positive effect on bacterial interaction. Furthermore, changes of soil water condition and nutrient status showed dominantly direct positive effects on soil bacterial reassembly, while falling soil pH significantly promoted bacterial reassembly by increasing keystone taxa and bacterial interaction during wetland restoration. Overall, findings highlighted the crucial role of environmental filtering and its pathway in influencing keystone bacterial taxa that promotes the reassembly of bacterial community during wetland restoration. Our work thus provides a new crucial and timely insight for improving the management of soil bacterial community assembly within the plethora of current and future wetland restoration projects.

AB - Soil bacteria are vital to regulate biogeochemical processes in wetlands, however, little is known about the patterns and mechanisms of soil bacterial re-organization during wetland restoration. Here, we used a space-for-time substitution approach and examined the ecological processes that drive soil bacterial assembly from cultivated to restored to natural wetlands. Results showed a decrease of soil bacterial α diversity and increase of bacterial community similarity and bacterial interaction (cooperation vs. competition) with years of restoration, which was dominantly influenced by deterministic processes. Identified bacterial keystone taxa (e.g. Variibacter, Acidibacter) with nutrient metabolism capacity exerted strong positive effect on bacterial interaction. Furthermore, changes of soil water condition and nutrient status showed dominantly direct positive effects on soil bacterial reassembly, while falling soil pH significantly promoted bacterial reassembly by increasing keystone taxa and bacterial interaction during wetland restoration. Overall, findings highlighted the crucial role of environmental filtering and its pathway in influencing keystone bacterial taxa that promotes the reassembly of bacterial community during wetland restoration. Our work thus provides a new crucial and timely insight for improving the management of soil bacterial community assembly within the plethora of current and future wetland restoration projects.

U2 - 10.1016/j.scitotenv.2024.176586

DO - 10.1016/j.scitotenv.2024.176586

M3 - Article

C2 - 39349191

VL - 954

SP - 176586

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -