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Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem
Tao Zhen; Shen ChengDe; Gao QuanZhou; Sun YanMin; Yi WeiXi; Li YingNian
2007-06-01
Source PublicationSCIENCE IN CHINA SERIES D-EARTH SCIENCES
Volume50Issue:7Pages:1103-1114
SubtypeArticle
AbstractHigh-resolution sampling, measurements of organic carbon contents and C-14 signatures of selected four soil profiles in the Haibei Station situated on the northeast Tibetan Plateau, and application of C-14 tracing technology were conducted in an attempt to investigate the turnover times of soil organic carbon and the soil-CO2 flux in the alpine meadow ecosystem. The results show that the organic carbon stored in the soils varies from 22.12x10(4) kg C hm(-2) to 30.75x10(4) kg C hm(-2) in the alpine meadow ecosystems, with an average of 26.86x10(4) kg C hm(-2). Turnover times of organic carbon pools increase with depth from 45 a to 73 a in the surface soil horizon to hundreds of years or millennia or even longer at the deep soil horizons in the alpine meadow ecosystems. The soil-CO2 flux ranges from 103.24 g C m(-2) a(-1) to 254.93 gC m(-2) a(-1), with an average of 191.23 g C m(-2) a(-1). The CO2 efflux produced from microbial decomposition of organic matter varies from 73.3 g C m(-2) a(-1) to 181 g C m(-2) a(-1). More than 30% of total soil organic carbon resides in the active carbon pool and 72.8%. 81.23% of total CO2 emitted from organic matter decomposition results from the topsoil horizon (from 0 cm to 10 cm) for the Kobresia meadow. Responding to global warming, the storage, volume of flow and fate of the soil organic carbon in the alpine meadow ecosystem of the Tibetan Plateau will be changed, which needs further research.; High-resolution sampling, measurements of organic carbon contents and C-14 signatures of selected four soil profiles in the Haibei Station situated on the northeast Tibetan Plateau, and application of C-14 tracing technology were conducted in an attempt to investigate the turnover times of soil organic carbon and the soil-CO2 flux in the alpine meadow ecosystem. The results show that the organic carbon stored in the soils varies from 22.12x10(4) kg C hm(-2) to 30.75x10(4) kg C hm(-2) in the alpine meadow ecosystems, with an average of 26.86x10(4) kg C hm(-2). Turnover times of organic carbon pools increase with depth from 45 a to 73 a in the surface soil horizon to hundreds of years or millennia or even longer at the deep soil horizons in the alpine meadow ecosystems. The soil-CO2 flux ranges from 103.24 g C m(-2) a(-1) to 254.93 gC m(-2) a(-1), with an average of 191.23 g C m(-2) a(-1). The CO2 efflux produced from microbial decomposition of organic matter varies from 73.3 g C m(-2) a(-1) to 181 g C m(-2) a(-1). More than 30% of total soil organic carbon resides in the active carbon pool and 72.8%. 81.23% of total CO2 emitted from organic matter decomposition results from the topsoil horizon (from 0 cm to 10 cm) for the Kobresia meadow. Responding to global warming, the storage, volume of flow and fate of the soil organic carbon in the alpine meadow ecosystem of the Tibetan Plateau will be changed, which needs further research.
KeywordTibetan Plateau Alpine Meadow Soil Organic Carbon Co2 Flux C-14 Signature
WOS HeadingsScience & Technology ; Physical Sciences
Subject Area生物科学
WOS KeywordTIBETAN PLATEAU ; TURNOVER RATES ; LAND-USE ; RADIOCARBON ; VEGETATION ; GRASSLAND ; CHINA ; RESPIRATION ; EXCHANGE ; IMPACT
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000247977700016
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/1260
Collection中国科学院西北高原生物研究所
Affiliation1.Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
3.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Peoples R China
Recommended Citation
GB/T 7714
Tao Zhen,Shen ChengDe,Gao QuanZhou,et al. Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50(7):1103-1114.
APA Tao Zhen,Shen ChengDe,Gao QuanZhou,Sun YanMin,Yi WeiXi,&Li YingNian.(2007).Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,50(7),1103-1114.
MLA Tao Zhen,et al."Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 50.7(2007):1103-1114.
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