文献类型：期刊文献

英文题名：Effects of Canopy Damage and Litterfall Input on CO₂-Fixing Bacterial Communities

作者：Yu, Fei[1] Li, Zhen[1] Liang, Junfeng[2] Zhao, Houben[2]

第一作者：Yu, Fei

通信作者：Li, Z[1]

机构：[1]Shanxi Agr Univ, Coll Forestry, Jinzhong 030801, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China

年份：2023

卷号：14

期号：9

外文期刊名：FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001073610100001)】；

基金：We gratefully acknowledge the assistance of numerous staff from Xiaoken Forest Farm with the field investigation and sample processing.

语种：英文

外文关键词：extreme weather events; canopy openness; litterfall decomposition; CO2-fixing bacteria; cbbL gene

摘要：Extreme weather events often cause canopy disturbance and litter deposition. To study the CO2-fixing bacterial response to forest damage, we simulated the canopy damage caused by extreme weather with four different treatments: control (CN), canopy trimming + removal of branches and leaves debris (TR), canopy trimming + retaining of branches and leaves debris (TD), and undamaged + transplantation of branches and leaves debris (UD). We used the cbbL gene, which encodes ribulose-1,5-biphosphate carboxylase/oxygenase (RubisCO), for Miseq sequencing to analyze the dynamics of community composition of soil CO2-fixing bacteria for five consecutive years after canopy damage. Double treatments of canopy damage and litterfall inputs (TD) facilitate forest restoration better than single treatments (TR or UD). Most soil CO2-fixing bacteria are facultative autotrophic bacteria, and Nitrosospira, Streptomyces, and Saccharomonospora are the main carbon-fixing microorganisms, which have significant differences during the restoration of damaged forest canopy. The forest ecosystem restoration after canopy damage lasted 4-5 years. Rainfall and pH showed a significant negative correlation with most soil CO2-fixing bacteria communities. This study provides a theoretical basis for improving the carbon sequestration capacity of forest soil CO2-fixing bacteria after extreme weather and also provides guidance for forest ecosystem management.