The interplay of labile organic carbon, enzyme activities and microbial communities of two forest soils across seasons
Autor: | Jinshi Jian, Can Du, Chen-Yang Xu, Zeng-Chao Geng, Qiang Wang, Lin Hou, Zhi-kang Wang |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
0301 basic medicine
Science Article Carbon cycle 03 medical and health sciences Dissolved organic carbon Relative species abundance Total organic carbon Multidisciplinary biology Ecology Chemistry Betula albosinensis Picea asperata 04 agricultural and veterinary sciences Biogeochemistry biology.organism_classification Environmental sciences 030104 developmental biology Agronomy Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Medicine Acidobacteria |
Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021) Scientific Reports |
ISSN: | 2045-2322 |
Popis: | Soil labile organic carbon (LOC) responds rapidly to environmental changes and plays an important role in carbon cycle. In this study, the seasonal fluctuations in LOC, the activities of carbon-cycle related enzymes, and the bacterial and fungal communities were analyzed for soils collected from two forests, namely Betula albosinensis (Ba) and Picea asperata Mast. (Pa), in the Qinling Mountains of China. Results revealed that the seasonal average contents of microbial biomass carbon (MBC), easily oxidized organic carbon (EOC), and dissolved organic carbon (DOC) of Pa forest soil were 13.5%, 30.0% and 15.7% less than those in Ba soil. The seasonal average enzyme activities of β-1,4-glucosidase (βG), and β-1,4-xylosidase (βX) of Ba forest soils were 30.0% and 32.3% higher than those of Pa soil while the enzyme activity of cellobiohydrolase (CBH) was 19.7% lower. Furthermore, the relative abundance of Acidobacteria was significantly higher in summer than in winter, whereas the relative abundance of Bacteroidetes was higher in winter. Regarding the fungal communities, the relative abundance of Basidiomycota was lowest in winter, whereas Ascomycota predominated in the same season. In addition, the soil LOC was significantly positively correlated with the CBH, βG and βX activities. Changes in LOC were significantly correlated with Acidobacteria, Bacteroidetes and Basidiomycota. We conclude that the seasonal fluctuations in forest soil LOC fractions relied on carbon cycle-associated enzymatic activities and microorganisms, which in turn were affected by climatic conditions. |
Databáze: | OpenAIRE |
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