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Elevation-dependent effects of growing season length on carbon sequestration in Xizang Plateau grassland

文献类型：期刊论文

作者Tao, Jian2; Dong, Jinwei1; Zhang, Yangjian3; Yu, Xiuqin2; Zhang, Geli4; Cong, Nan3; Zhu, Juntao3; Zhang, Xianzhou3
刊名ECOLOGICAL INDICATORS
出版日期2020-03-01
卷号110页码:9
关键词Carbon sequestration Growing season length Xizang Plateau Elevational gradient
ISSN号1470-160X
DOI10.1016/j.ecolind.2019.105880
通讯作者Tao, Jian(taojian_ecology@163.com)
英文摘要Interannual variations in terrestrial carbon sequestration are jointly controlled by vegetation phenology and physiological activity. However, it remains unclear how this joint control varies with elevation in alpine ecosystems. To explore the relationships among these factors in Xizang Plateau grassland during 1981-2014, we used the remotely sensed total enhanced vegetation index (EVI) during the growing season (EVIGST), growing season length (GSL), and maximum EVI during the growing season (EVImax) as indicators of annual carbon sequestration, phenology, and photosynthetic activity, respectively. Using these indicators, we investigated the effects of phenology and photosynthetic activity on annual carbon sequestration along an elevation gradient. We found that EVIGST increased, indicating an improvement in carbon sequestration, under prolonged GSL and enhanced EVImax. The trend of a prolonged GSL increased with elevation by 0.039 day year(-1) per 1000 m (p < 0.001). The interannual variation in EVIGST was better explained by the interannual variation in GSL (standardized regression coefficient, SRC: 0.88; linear R-2: 0.89; partial R-2: 0.85) than by that in EVImax (SRC: 0.12; linear R-2: 0.33; partial R-2: 0.09). This stronger contribution of GSL than of EVImax became more pronounced with increasing elevation. The increase in GSL was more effective than the resistance of environmental constraints of the maximum photosynthetic activity on strengthening carbon sequestration under more extreme environments at higher elevations. These findings increase our understanding of phenological effects on carbon sequestration in alpine ecosystems. Given the projected climate warming and wetting in the future, our study suggests that carbon sequestration will increase due to climate-induced prolongation of GSL across Xizang Plateau grassland. The plateau may play an increasingly crucial role in mitigating future climate change.
WOS关键词GROSS PRIMARY PRODUCTIVITY ; VEGETATION GREEN-UP ; NET PRIMARY PRODUCTIVITY ; HIGH NORTHERN LATITUDES ; CLIMATE-CHANGE ; TIBETAN PLATEAU ; SPRING PHENOLOGY ; ALPINE GRASSLAND ; PLANT PHENOLOGY ; CHINA
资助项目Science Foundation for Young Scholars of the National Natural Science Foundation of China[41501054] ; Science Foundation for Young Scholars of the National Natural Science Foundation of China[41725003] ; Chinese Academy of Sciences (CAS)[XDA19040301] ; Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC005] ; Scientific Research Foundation of Shandong Technology and Business University[BS201735]
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000507381800043
出版者ELSEVIER
资助机构Science Foundation for Young Scholars of the National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Scientific Research Foundation of Shandong Technology and Business University
源URL[http://ir.igsnrr.ac.cn/handle/311030/131501]  
专题中国科学院地理科学与资源研究所
通讯作者Tao, Jian
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
2.Shandong Technol & Business Univ, Coll Publ Adm, Yantai 264005, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Stn, Beijing 100101, Peoples R China
4.China Agr Univ, Coll Land Sci & Technol, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Tao, Jian,Dong, Jinwei,Zhang, Yangjian,et al. Elevation-dependent effects of growing season length on carbon sequestration in Xizang Plateau grassland[J]. ECOLOGICAL INDICATORS,2020,110:9.
APA Tao, Jian.,Dong, Jinwei.,Zhang, Yangjian.,Yu, Xiuqin.,Zhang, Geli.,...&Zhang, Xianzhou.(2020).Elevation-dependent effects of growing season length on carbon sequestration in Xizang Plateau grassland.ECOLOGICAL INDICATORS,110,9.
MLA Tao, Jian,et al."Elevation-dependent effects of growing season length on carbon sequestration in Xizang Plateau grassland".ECOLOGICAL INDICATORS 110(2020):9.

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来源：地理科学与资源研究所

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