Sea-crossing bridge construction interference reduced soil microbial biomass and diversity in mangrove ecosystems  

作　　者：Gui-Feng Gao Yin He Jiasui Li Subo Yan Luyao Song Haiyan Chu 

机构地区：[1]State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Guangxi Xingang Transportation Investment Co.,Ltd.

出　　处：《Soil Ecology Letters》2025年第1期13-23,共11页土壤生态学快报(英文)

基　　金：financially supported by the funding of Guangxi Xingang Transportation Investment Co.,Ltd.(Grant No.2022-0006).

摘　　要：Soils in mangrove ecosystems are home to diverse and unique microbes,which support many crucial ecosystem services.Despite their vulnerability,the impact of bridge construction on the soil microbiome in mangroves is poorly understood.This study assessed the bacterial community profiles and microbial biomass in mangrove soils under different bridge construction techniques:Sheet Pile Cofferdam(SP)and Steel Casing Pipe(SC),compared to the non-disturbed(ND)counterpart.Bridge construction significantly decreased the alpha diversity and caused biotic homogenization of soil bacterial communities,indicating a loss of microbial biodiversity due to human disturbance.Bridge construction also reduced the microbial biomass carbon and nitrogen.The assembly of soil bacterial communities was dominated by stochastic processes,and bridge construction increased the relative importance of stochasticity.However,the impacts on ecological networks varied with the construction technique,with SC soils showing higher network complexity and stability compared to the ND habitats.Changes in soil bacterial communities were primarily attributed to the shifts in soil pH and nutrient levels.This study identified the effects of sea-crossing bridge construction on the soil microbiome in mangrove ecosystems,aiding in careful planning and environmental impact assessments to minimize the negative effects of urbanization on mangrove ecosystems.

关 键 词：BIODIVERSITY community assembly ecological network mangrove ecosystem bridge construction 

分 类 号：S15[农业科学—土壤学]