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Effects of environmental variation on stable isotope abundances during typical seasonal floodplain dry season litter decomposition
Zhang, Guangshuai1,2; Yu, Xiubo1,2; Xu, Jun3; Duan, Houlang1,2; Rafay, Loretta4; Zhang, Quanjun1,2; Li, Ya1,2; Liu, Yu1; Xia, Shaoxia1
2018-07-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume630Pages:1205-1215
Corresponding AuthorYu, Xiubo(yuxb@igsnrr.ac.cn)
AbstractUnique hydrological characteristics and complex topography can create wide-ranging dry season environmental heterogeneity in response to groundwater level across China's Jiangxi Province Poyang Lake wetland. Soil traits are one of several fluctuating environmental variables. To determine the effects of soil variables on stable isotope (delta C-13 and delta N-15) abundances during decomposition, we performed a field experiment using Carex cineruscens along a groundwater level gradient (GT-L: 25 to 50 cm, GT-LM: 15 to 25 cm, GT-MH: 5 to 15 cm, GT-H: 5 to 5 cm) in a shallow lake. Twelve soil properties including total organic carbon (TOC), nitrogen (N), pH, moisture, bulk density, clay, silt, sand, peroxidase, cellulase, microbial biomass carbon (MBC), and microbial biomass nitrogen were measured in surface soil samples to assess soil environmental conditions. Analyses were performed to determine the effects of soil traits and lignin degradation on changes in stable isotope abundances. This study revealed that stable isotope abundances were significantly lower at high groundwater levels than at low groundwater levels. Lignin degradation was associated with a decrease in both delta C-13 and delta N-15 abundances. These two stable isotopes were positively related with soil N and bulk density, but negatively with pH and microbial quotient (MBC/TOC). Variation partitioning analysis (VPA) showed that soil variables and lignin decay rates explained 80.1% of the rinC variation and 42.8% of the "615N variation. Soil chemical and biological variables exhibited significant interactions with lignin decay rates, indicating they may affect stable isotope abundances via complex mechanisms. Our results indicate that the change in stable isotope abundances during decomposition may be affected directly by soil variables or indirectly through lignin degradation. Our results provide useful insight for understanding the roles litter decomposition and soil traits in changing environmental conditions of seasonal floodplain wetlands. (C) 2013 Elsevier B.V. All rights reserved.
KeywordIsotopic variation Litter decomposition Lignin degradation Variation partitioning analysis Poyang Lake Wetland
DOI10.1016/j.scitotenv.2018.02.298
WOS KeywordSOIL ORGANIC-MATTER ; CARBON-ISOTOPE ; WATER-TABLE ; LEAF-LITTER ; MICROBIAL BIOMASS ; MYCORRHIZAL FUNGI ; NATURAL C-13 ; DYNAMICS ; NITROGEN ; WETLANDS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41471088]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000432467700120
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54889
Collection中国科学院地理科学与资源研究所
Corresponding AuthorYu, Xiubo
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Donghu Expt Stn Lake Ecosyst, Wuhan 430072, Hubei, Peoples R China
4.Univ Washington, Sch Environm & Forest Sci, Seattle, WA 98195 USA
Recommended Citation
GB/T 7714
Zhang, Guangshuai,Yu, Xiubo,Xu, Jun,et al. Effects of environmental variation on stable isotope abundances during typical seasonal floodplain dry season litter decomposition[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,630:1205-1215.
APA Zhang, Guangshuai.,Yu, Xiubo.,Xu, Jun.,Duan, Houlang.,Rafay, Loretta.,...&Xia, Shaoxia.(2018).Effects of environmental variation on stable isotope abundances during typical seasonal floodplain dry season litter decomposition.SCIENCE OF THE TOTAL ENVIRONMENT,630,1205-1215.
MLA Zhang, Guangshuai,et al."Effects of environmental variation on stable isotope abundances during typical seasonal floodplain dry season litter decomposition".SCIENCE OF THE TOTAL ENVIRONMENT 630(2018):1205-1215.
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