干旱区生态环境知识资源中心(Arid): Gross primary production of Mediterranean watersheds: Using isotope mass balance approach to improve estimations

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DOI	10.1002/eco.2619
	Gross primary production of Mediterranean watersheds: Using isotope mass balance approach to improve estimations
	Mattei, Alexandra; Huneau, Frederic; Garel, Emilie; Santoni, Sebastien; Leydier, Thomas; Vystavna, Yuliya
通讯作者	Huneau, F
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2024
卷号	17 期号:2
英文摘要	Global-scale estimates of carbon fluxes from satellite data-driven models are constrained by considerable uncertainties regarding Gross Primary Production (GPP) and the lack of the watershed-scale measurements required for model calibration. Recently conducted global modelling efforts indicate that semiarid ecosystems dominate the increasing trends and inter-annual variation of net CO2 exchange with the atmosphere, but semi-arid regions have received little attention with regard to GPP estimation. In this study, we used the distinct isotope effect of transpiration and evaporation to calculate transpiration losses and subsequently CO2 uptake by terrestrial vegetation through the water and carbon cycle using the water use efficiency of plants. By studying two Mediterranean watersheds with contrasted environmental conditions over several hydrological years, we found a strong dependence of GPP on annual and seasonal water availability. The results demonstrated that when compared to GPP values obtained in worldwide biomes using biological methods, our isotope approach was validated, highlighting the limitations of satellite-data-driven models like MODIS in capturing the impact of water stress on photosynthesis and GPP estimates. These results encourage investigation of GPP by the isotope mass balance approach where direct carbon flux measurements are rare or absent in order to help to substantiate, modify or shed doubt on interpolated GPP for those regions and achieve consensus on global GPP estimates. Given the relevant role of semi-arid ecosystems in the global carbon balance as well as the limitation of existing data sets, our improved method based on the isotope mass balance approach helps to obtain rapid and affordable estimates of GPP for semi-arid ecosystems.
英文关键词	carbon budget Corsica river stable isotopes vegetation cover water balance
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001147248000001
WOS关键词	TERRESTRIAL CARBON BALANCE ; SEMIARID ECOSYSTEMS ; GLOBAL DISTRIBUTION ; STABLE-ISOTOPE ; AVAILABILITY ; FLUXES ; GPP ; TRANSPIRATION ; VARIABILITY ; EVAPORATION
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403347
推荐引用方式 GB/T 7714	Mattei, Alexandra,Huneau, Frederic,Garel, Emilie,et al. Gross primary production of Mediterranean watersheds: Using isotope mass balance approach to improve estimations[J],2024,17(2).
APA	Mattei, Alexandra,Huneau, Frederic,Garel, Emilie,Santoni, Sebastien,Leydier, Thomas,&Vystavna, Yuliya.(2024).Gross primary production of Mediterranean watersheds: Using isotope mass balance approach to improve estimations.ECOHYDROLOGY,17(2).
MLA	Mattei, Alexandra,et al."Gross primary production of Mediterranean watersheds: Using isotope mass balance approach to improve estimations".ECOHYDROLOGY 17.2(2024).