干旱区生态环境知识资源中心(Arid): Impact of Shifts in Vegetation Phenology on the Carbon Balance of a Semiarid Sagebrush Ecosystem

Arid

DOI	10.3390/rs14235924
	Impact of Shifts in Vegetation Phenology on the Carbon Balance of a Semiarid Sagebrush Ecosystem
	Yao, Jingyu; Yuan, Wenping; Gao, Zhongming; Liu, Heping; Chen, Xingyuan; Ma, Yongjing; Arntzen, Evan; Mcfarland, Douglas
通讯作者	Gao, ZM
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2022
卷号	14 期号:23
英文摘要	Dryland ecosystems are critical in regulating the interannual variability of the global terrestrial carbon cycle. The responses of such ecosystems to weather and environmental conditions remain important factors that limit the accurate projections of carbon balance under future climate change. Here, we investigated how shifts in vegetation phenology resulting from changes in weather and environmental conditions influenced ecosystem carbon cycling in one semiarid ecosystem in the Hanford area of central Washington, United States. We examined two years of measurements of the phenology camera, eddy covariance, and soil chamber from an upland semiarid sagebrush ecosystem. Both years had contrasting diel and seasonal patterns of CO2 fluxes, primarily driven by differences in vegetation phenology. The net ecosystem exchange of CO2 (NEE) and evapotranspiration (ET) in 2019 were enlarged by shifted vegetation phenology, as a cold and snow-covered winter and warm and dry winter in 2020 resulted in constrained magnitudes of NEE and ET during the summer months. The annual gross primary productivity (GPP) was much higher in 2019 than in 2020 (-211 vs. -112 gC m(-2)), whereas ecosystem respiration was comparable in these two years (164 vs. 144 gC m(-2)). Thus, the annual NEE in 2019 was negative (-47 gC m(-2)) with the sagebrush ecosystem functioning as a carbon sink, while the positive annual NEE in 2020 indicated that the sagebrush ecosystem functioned as a carbon source. Our results demonstrate that winter snowpack can be a critical driver of annual carbon uptake in semiarid sagebrush ecosystems.
英文关键词	carbon fluxes PhenoCam semi-arid regions snowpack vegetation phenology
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000898070300001
WOS关键词	INTERANNUAL VARIABILITY ; DIOXIDE EXCHANGE ; FLUX ; SOIL ; WATER ; CLIMATE ; SNOW ; RESPIRATION ; SAVANNA ; HEAT
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394240
推荐引用方式 GB/T 7714	Yao, Jingyu,Yuan, Wenping,Gao, Zhongming,et al. Impact of Shifts in Vegetation Phenology on the Carbon Balance of a Semiarid Sagebrush Ecosystem[J],2022,14(23).
APA	Yao, Jingyu.,Yuan, Wenping.,Gao, Zhongming.,Liu, Heping.,Chen, Xingyuan.,...&Mcfarland, Douglas.(2022).Impact of Shifts in Vegetation Phenology on the Carbon Balance of a Semiarid Sagebrush Ecosystem.REMOTE SENSING,14(23).
MLA	Yao, Jingyu,et al."Impact of Shifts in Vegetation Phenology on the Carbon Balance of a Semiarid Sagebrush Ecosystem".REMOTE SENSING 14.23(2022).