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Microbial CO2 assimilation is not limited by the decrease in autotrophic bacterial abundance and diversity in eroded watershed
Haibing Xiao1,2; Zhongwu Li1,3; Xiaofeng Chang1; Lei Deng1; Xiaodong Nie4; Chun Liu3; Lin Liu1; Jieyu Jiang3; Jia Chen1,2; Danyang Wang3; Li, ZW (reprint author), Inst Soil & Water Conservat CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Li, ZW (reprint author), Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
SubtypeArticle
2018
Source PublicationBIOLOGY AND FERTILITY OF SOILS
ISSN0178-2762
description.correspondentemaillizw@hnu.edu.cn
Volume54Issue:5Pages:595-605
AbstractThe impacts of soil erosion on soil structure, nutrient, and microflora have been extensively studied but little is known about the responses of autotrophic bacterial community and associated carbon (C)-fixing potential to soil erosion. In this study, three abandoned croplands (ES1, ES2, and ES3) and three check dams (DS1, DS2, and DS3) in the Qiaozi watershed of Chinese Loess Plateau were selected as eroding sites and depositional sites, respectively, to evaluate the impacts of soil erosion on autotrophic bacterial community and associated C-fixing potential. Lower abundance and diversity of autotrophic bacteria were observed in nutrient-poor depositional sites compared with nutrient-rich eroding sites. However, the relative abundances of obligate autotrophic bacteria, such as Thiobacillus and Synechococcus, were significantly enhanced in depositional sites. Deposition of nutrient-poor soil contributed to the growth of obligate autotrophic bacteria. The maximum microbial C-fixing rate was observed in DS1 site (5.568 +/- 1.503 Mg C km(-2) year(-1)), followed by DS3 site (5.306 +/- 2.130 Mg C km(-2) year(-1)), and the minimum was observed in ES2 site (0.839 +/- 0.558 Mg C km(-2) year(-1)). Soil deposition significantly enhanced microbial C-fixing rate. Assuming a total erosion area of 1.09 x 10(7) km(2), microbial C-fixing potential in eroded landscape can range from 0.01 to 0.06 Pg C year(-1). But its effect on the C pool recovery of degraded soil is limited. Dissolved organic C (DOC) was the main explanatory factor for the variation in soil microbial C-fixing rate (72.0%, P = 0.000).
KeywordSoil Erosion Organic Carbon Autotrophic Bacteria Carbon-fixing Potential Chinese Loess Plateau
Subject AreaAgriculture
DOI10.1007/s00374-018-1284-7
Indexed BySCI
Publication Place233 SPRING ST, NEW YORK, NY 10013 USA
Language英语
WOS IDWOS:000434829400004
PublisherSPRINGER
Funding OrganizationHundred-talent Project of the Chinese Academy of Sciences ; Hundred-talent Project of the Chinese Academy of Sciences ; National Natural Science Foundation of China [41271294] ; National Natural Science Foundation of China [41271294]
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8220
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorLi, ZW (reprint author), Inst Soil & Water Conservat CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Li, ZW (reprint author), Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
Affiliation1.Inst Soil & Water Conservat CAS & MWR, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100000, Peoples R China
3.Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
4.Guangdong Inst Ecoenvironm Sci & Technol, Guangdong Key Lab Integrated Agroenvironm Pollut, Guangzhou 510650, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Haibing Xiao,Zhongwu Li,Xiaofeng Chang,et al. Microbial CO2 assimilation is not limited by the decrease in autotrophic bacterial abundance and diversity in eroded watershed[J]. BIOLOGY AND FERTILITY OF SOILS,2018,54(5):595-605.
APA Haibing Xiao.,Zhongwu Li.,Xiaofeng Chang.,Lei Deng.,Xiaodong Nie.,...&Li, ZW .(2018).Microbial CO2 assimilation is not limited by the decrease in autotrophic bacterial abundance and diversity in eroded watershed.BIOLOGY AND FERTILITY OF SOILS,54(5),595-605.
MLA Haibing Xiao,et al."Microbial CO2 assimilation is not limited by the decrease in autotrophic bacterial abundance and diversity in eroded watershed".BIOLOGY AND FERTILITY OF SOILS 54.5(2018):595-605.
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