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Climatic, Edaphic and Biotic Controls over Soil delta C-13 and delta N-15 in Temperate Grasslands

文献类型：期刊论文

作者Zhao, Xing7; Xu, Xingliang1,2; Wang, Fang7; Greenberg, Isabel3; Liu, Min1,7; Che, Rongxiao5; Zhang, Li4; Cui, Xiaoyong2,6,7
刊名FORESTS
出版日期2020-04-01
卷号11期号:4页码:13
关键词carbon cycling natural stable isotope abundance nitrogen cycling soil organic matter temperate grassland
DOI10.3390/f11040433
通讯作者Xu, Xingliang(xuxingl@hotmail.com) ; Cui, Xiaoyong(cuixy@ucas.edu.cn)
英文摘要Soils delta C-13 and delta N-15 are now regarded as useful indicators of nitrogen (N) status and dynamics of soil organic carbon (SOC). Numerous studies have explored the effects of various factors on soils delta C-13 and delta N-15 in terrestrial ecosystems on different scales, but it remains unclear how co-varying climatic, edaphic and biotic factors independently contribute to the variation in soil delta C-13 and delta N-15 in temperate grasslands on a large scale. To answer the above question, a large-scale soil collection was carried out along a vegetation transect across the temperate grasslands of Inner Mongolia. We found that mean annual precipitation (MAP) and mean annual temperature (MAT) do not correlate with soil delta N-15 along the transect, while soil delta C-13 linearly decreased with MAP and MAT. Soil delta N-15 logarithmically increased with concentrations of SOC, total N and total P. By comparison, soil delta C-13 linearly decreased with SOC, total N and total P. Soil delta N-15 logarithmically increased with microbial biomass C and microbial biomass N, while soil delta C-13 linearly decreased with microbial biomass C and microbial biomass N. Plant belowground biomass linearly increased with soil delta N-15 but decreased with soil delta C-13. Soil delta N-15 decreased with soil delta C-13 along the transect. Multiple linear regressions showed that biotic and edaphic factors such as microbial biomass C and total N exert more effect on soil delta N-15, whereas climatic and edaphic factors such as MAT and total P have more impact on soil delta C-13. These findings show that soil C and N cycles in temperate grasslands are, to some extent, decoupled and dominantly controlled by different factors. Further investigations should focus on those ecological processes leading to decoupling of C and N cycles in temperate grassland soils.
WOS关键词N-15 NATURAL-ABUNDANCE ; ORGANIC-MATTER ; ISOTOPIC COMPOSITION ; PRECIPITATION GRADIENT ; ENVIRONMENTAL CONTROLS ; EXTRACTION METHOD ; CARBON ; NITROGEN ; BIOMASS ; PLANTS
资助项目National Key Research and Development Program of China[2016YFC0501802] ; National Key Research and Development Program of China[2017YFA0604802] ; National Natural Science Foundation of China[41877089]
WOS研究方向Forestry
语种英语
WOS记录号WOS:000534632500071
出版者MDPI
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/159526]  
专题中国科学院地理科学与资源研究所
通讯作者Xu, Xingliang; Cui, Xiaoyong
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Univ Kassel, Dept Environm Chem, Nordbahnhofstr 1a, D-37213 Witzenhausen, Germany
4.Fudan Univ, Shanghai Inst Ecochongming, Sch Life Sci, Minist Educ,Key Lab Biodivers Sci & Ecol Engn,Coa, 2005 Songhu Rd, Shanghai 200438, Peoples R China
5.Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650500, Yunnan, Peoples R China
6.Chinese Acad Sci, Yanshan Ecoenvironm Observ, Beijing 101408, Peoples R China
7.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Xing,Xu, Xingliang,Wang, Fang,et al. Climatic, Edaphic and Biotic Controls over Soil delta C-13 and delta N-15 in Temperate Grasslands[J]. FORESTS,2020,11(4):13.
APA Zhao, Xing.,Xu, Xingliang.,Wang, Fang.,Greenberg, Isabel.,Liu, Min.,...&Cui, Xiaoyong.(2020).Climatic, Edaphic and Biotic Controls over Soil delta C-13 and delta N-15 in Temperate Grasslands.FORESTS,11(4),13.
MLA Zhao, Xing,et al."Climatic, Edaphic and Biotic Controls over Soil delta C-13 and delta N-15 in Temperate Grasslands".FORESTS 11.4(2020):13.

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来源：地理科学与资源研究所

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