气候变化领域集成服务门户(CCPortal): Carbon budgets and environmental controls in alpine ecosystems on the Qinghai-Tibet Plateau

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DOI	10.1016/j.catena.2023.107224
	Carbon budgets and environmental controls in alpine ecosystems on the Qinghai-Tibet Plateau
	Ma, Wensi; Wu, Tonghua; Wu, Xiaodong; Yang, Sizhong; Li, Ren; Zhou, Shiqiao; Li, Xiangfei; Zhu, Xiaofan; Hao, Junming; Ni, Jie; Wang, Dong
发表日期	2023
ISSN	0341-8162
EISSN	1872-6887
卷号	229
英文摘要	Rapid warming in alpine regions exerts important effects on carbon cycling in alpine ecosystem, which are sensitive to environmental changes. So far, little is known about the spatial and temporal variation in carbon budgets and the main influencing factors over different ecosystems. Here, we examined the monthly and annual gross primary production (GPP), net ecosystem CO2 exchange (NEE) and ecosystem respiration (ER) during 2004-2017 in four types of ecosystems (i.e., alpine meadow, steppe, forest and cropland) on the Tibetan Plateau. We explored the relationships between carbon fluxes and environmental factors. The results show that forest, cropland and alpine meadow ecosystems acted as carbon sinks, with NEE values ranging from -21.25 +/- 3.54 to -308.75 +/- 21.65 g C m-2a-1, while alpine steppe and overmature forest ecosystems serve as carbon sources (mean annual NEE: 23.12 +/- 15.88 g C m-2a-1). The temperature sensitivity values (Q10) of ER in the forest (9.39) and alpine steppe (7.47) ecosystems were greater than those in the alpine meadow ecosystems (Q10 = 4.20), indicating that the carbon emissions in the forest and alpine steppe ecosystems were more sensitive to warming. Multiple linear regression analysis indicated that the carbon fluxes (GPP, NEE, ER) of alpine steppe and alpine meadow in the permafrost regions were more sensitive to water forcing (precipitation, soil water content), while in the forest and cropland ecosystems temperature forcing (air and soil temperature) were strong predictors of all the carbon flux indices. Our results showed differential responses of carbon budgets among ecosystems, which could be considered in the future modeling of carbon cycle in alpine regions.
关键词	Carbon fluxes Environmental controls Q10 Alpine ecosystems Qinghai-Tibet Plateau
英文关键词	SOIL CO2 EFFLUX; ORGANIC-MATTER DECOMPOSITION; NET PRIMARY PRODUCTIVITY; CLIMATE-CHANGE; TEMPERATURE SENSITIVITY; DIOXIDE EXCHANGE; TERRESTRIAL ECOSYSTEMS; SEASONAL-VARIATIONS; SPATIAL VARIATION; EDDY-COVARIANCE
WOS研究方向	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:001001104500001
来源期刊	CATENA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282873
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS
推荐引用方式 GB/T 7714	Ma, Wensi,Wu, Tonghua,Wu, Xiaodong,et al. Carbon budgets and environmental controls in alpine ecosystems on the Qinghai-Tibet Plateau[J]. 中国科学院青藏高原研究所,2023,229.
APA	Ma, Wensi.,Wu, Tonghua.,Wu, Xiaodong.,Yang, Sizhong.,Li, Ren.,...&Wang, Dong.(2023).Carbon budgets and environmental controls in alpine ecosystems on the Qinghai-Tibet Plateau.CATENA,229.
MLA	Ma, Wensi,et al."Carbon budgets and environmental controls in alpine ecosystems on the Qinghai-Tibet Plateau".CATENA 229(2023).