中文版 | English
Title

Land use intensification in a dry-hot valley reduced the constraints of water content on soil microbial diversity and multifunctionality but increased CO2 production

Author
Corresponding AuthorXu,Jianchu; Gui,Heng
Publication Years
2022-08-30
DOI
Source Title
ISSN
0048-9697
EISSN
1879-1026
Volume852
Abstract

Conversion of abandoned land (mainly savanna) into cropland generally occurs in fragile ecosystems such as dry-hot valleys (DHVs) in southwest China, with the intent of increasing land productivity and conducting ecological restoration. However, the effects of conversion on soil microbial communities and carbon turnover of savanna ecosystems remain unclear, since savannas could be a vital but overlooked carbon sink. To illustrate the ecological consequences of land-use change (LUC) for savanna ecosystems, a 1-year field experiment was conducted in DHVs of southwest China. The soil properties, microbial respiration, and metagenomics from two different land-use types (grassland and mango plantation) were examined to reveal the effects of regional LUC on soil C turnover and microbial traits. Conversion from degraded grassland into cropland increased the contribution of soil microclimate to the microbial community composition, reduced the constraints of soil water content (SWC), and further decreased nutrient availability. LUC reshaped the composition and structure of soil bacterial communities. Specifically, soil dominant microbes that belonged to Actinobacteria and Proteobacteria were significantly enriched by conversion, while rare microbes that belonged to a wider range of phyla were generally depleted, leading to an overall decrease in community diversity. In addition, LUC-induced changes in soil characteristics and microbial communities further decreased soil multifunctionality as well as the carbon use efficiency of microbes. Intensified microbial respiration and a significant increase in the soil CO efflux were observed following LUC, which could drive changes in soil microbial community composition and functions (such as growth and regeneration). In summary, through simultaneously reducing constraints on SWC and decreasing nutrient availability, conversion from degraded grassland to cropland in a DHV decreased soil microbial diversity and multifunctionality, and increased microbial respiration and soil CO efflux. Our study provides new insights for understanding the role and mechanisms of LUC in soil carbon turnover in ecologically fragile areas such as DHVs.

Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
Others
Funding Project
Youth Innovation Promotion Association of the Chinese Academy of Sciences[2022396] ; National Natural Science Foundation of China[32001296] ; National Natural Science Foundation of China[42073080]
WOS Research Area
Environmental Sciences & Ecology
WOS Subject
Environmental Sciences
WOS Accession No
WOS:000864081000002
Publisher
EI Accession Number
20223612700510
EI Keywords
Bacteria ; Carbon ; Ecosystems ; Land Use ; Nutrients ; Soil Moisture
ESI Classification Code
Urban And Regional Planning And Development:403 ; Ecology And Ecosystems:454.3 ; Soils And Soil Mechanics:483.1 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2
ESI Research Field
ENVIRONMENT/ECOLOGY
Scopus EID
2-s2.0-85137167882
Data Source
Scopus
Citation statistics
Cited Times [WOS]:2
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/401586
DepartmentSUSTech-Peking University National Institute of Plants and Food
生命科学学院
生命科学学院_生物系
Affiliation
1.Department of Economic Plants and Biotechnology,Yunnan Key Laboratory for Wild Plant Resources,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,650201,China
2.Centre for Mountain Futures (CMF),Kunming Institute of Botany,Chinese Academy of Sciences,Kunming,650201,China
3.Institute of Plant and Food Science,Department of Biology,School of Life Sciences,Southern University of Science and Technology,Shenzhen,518055,China
4.University of Chinese Academy of Sciences,Beijing,100049,China
5.State Key Laboratory of Grassland Agro-Ecosystems,Institute of Innovation Ecology,Lanzhou University,Lanzhou,730000,China
6.CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla,Yunnan,666303,China
7.World Agroforestry Centre (ICRAF),Nairobi,United Nations Avenue, Gigiri, P.O. Box 30677-00100,Kenya
First Author AffilicationSUSTech-Peking University National Institute of Plants and Food;  Department of Biology;  School of Life Sciences
Recommended Citation
GB/T 7714
Wang,Zhenghong,Liu,Xiang,Zhou,Wenjun,et al. Land use intensification in a dry-hot valley reduced the constraints of water content on soil microbial diversity and multifunctionality but increased CO2 production[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,852.
APA
Wang,Zhenghong.,Liu,Xiang.,Zhou,Wenjun.,Sinclair,Fergus.,Shi,Lingling.,...&Gui,Heng.(2022).Land use intensification in a dry-hot valley reduced the constraints of water content on soil microbial diversity and multifunctionality but increased CO2 production.SCIENCE OF THE TOTAL ENVIRONMENT,852.
MLA
Wang,Zhenghong,et al."Land use intensification in a dry-hot valley reduced the constraints of water content on soil microbial diversity and multifunctionality but increased CO2 production".SCIENCE OF THE TOTAL ENVIRONMENT 852(2022).
Files in This Item:
There are no files associated with this item.
Related Services
Fulltext link
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Export to Excel
Export to Csv
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Wang,Zhenghong]'s Articles
[Liu,Xiang]'s Articles
[Zhou,Wenjun]'s Articles
Baidu Scholar
Similar articles in Baidu Scholar
[Wang,Zhenghong]'s Articles
[Liu,Xiang]'s Articles
[Zhou,Wenjun]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang,Zhenghong]'s Articles
[Liu,Xiang]'s Articles
[Zhou,Wenjun]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.