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Dynamics and Controls of Carbon Use Efficiency across China's Grasslands
Hou, Ge1,2; Sun, Jian1; Wang, Jinniu3
2018
Source PublicationPOLISH JOURNAL OF ENVIRONMENTAL STUDIES
ISSN1230-1485
Volume27Issue:4Pages:1541-1550
Corresponding AuthorSun, Jian(sunjian@igsnrr.ac.cn)
AbstractChina's grasslands play a significant role in the carbon cycle. Accurately evaluating carbon use efficiency (CUE) of grassland ecosystems is of great importance. Therefore, we adopted moderate resolution imaging spectroradiometer documents to explore dynamics and controls of CUE across grasslands of China from 2001 to 2010. Results demonstrated that CUE presented an increasing trend (0 to 0.0067 year(-1)) in the most studies regions except for desert steppe (-0.0046 to 0 year(-1)). At spatial scale, the precipitation, temperature, and aridity index significantly regulated the dynamics of CUE in alpine grasslands. Furthermore, the different mechanisms are explored at the transect scale, and CUE revealed the positive correlation with aridity index (R-2 = 0.92, P<0.0001) and precipitation (R-2 = 0.88, P<0.0001), but a negative correlation with temperature (R-2 = 0.92, P<0.0001) in alpine grasslands. However, in temperate grasslands, CUE exposed the negative correlation with aridity index (R-2 = 0.40, P<0.0001) and precipitation (R-2 = 0.54, P<0.0001), but a positive correlation with temperature (R-2 = 0.56, P<0.0001). Moreover, precipitation was decreasing with the increased temperature in the alpine grasslands (R-2 = 0.85, P<0.0001) and temperature of grasslands (R-2 = 0.19, P<0.0001). In conclusion, CUE had a slight increased trend across grasslands in China, with higher precipitation, aridity index, and lower temperature promoting CUE in the alpine region - nevertheless restraining the CUE variations in grassland temperature. The better heat and water conditions in temperate grasslands than in alpine grasslands resulted in higher CUE in temperate grasslands.
Keywordcarbon use efficiency aridity index precipitation temperature grassland ecosystems
DOI10.15244/pjoes/76912
WOS KeywordNET PRIMARY PRODUCTIVITY ; GROSS PRIMARY PRODUCTION ; ENVIRONMENTAL-FACTORS ; TIBETAN PLATEAU ; SOIL RESPIRATION ; CLIMATE-CHANGE ; FOREST ; ECOSYSTEM ; PRECIPITATION ; PATTERN
Indexed BySCI
Language英语
Funding ProjectState Key Research Development Program of China[2016YFC0501802] ; State Key Research Development Program of China[2016YFC0501803] ; National Natural Science Foundation of China[41501057] ; Construction Service Program for Cultivating Feature Institution of the Chinese Academy of Sciences[TSYJS05] ; Youth Innovation Research Team Project[LENOM2016Q0003]
Funding OrganizationState Key Research Development Program of China ; National Natural Science Foundation of China ; Construction Service Program for Cultivating Feature Institution of the Chinese Academy of Sciences ; Youth Innovation Research Team Project
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000431069400013
PublisherHARD
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/55018
Collection中国科学院地理科学与资源研究所
Corresponding AuthorSun, Jian
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Synth Res Ctr,Chinese Ecosyst Res Network, Beijing, Peoples R China
2.Changan Univ, Sch Earth Sci & Resources, Xian, Shaanxi, Peoples R China
3.Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Hou, Ge,Sun, Jian,Wang, Jinniu. Dynamics and Controls of Carbon Use Efficiency across China's Grasslands[J]. POLISH JOURNAL OF ENVIRONMENTAL STUDIES,2018,27(4):1541-1550.
APA Hou, Ge,Sun, Jian,&Wang, Jinniu.(2018).Dynamics and Controls of Carbon Use Efficiency across China's Grasslands.POLISH JOURNAL OF ENVIRONMENTAL STUDIES,27(4),1541-1550.
MLA Hou, Ge,et al."Dynamics and Controls of Carbon Use Efficiency across China's Grasslands".POLISH JOURNAL OF ENVIRONMENTAL STUDIES 27.4(2018):1541-1550.
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