Does vegetation greening have a positive effect on global vegetation carbon and water use efficiency?

Autor: Ding H; College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China., Shi X; College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China. Electronic address: xiaoliangshi@xust.edu.cn., Yuan Z; Changjiang River Scientific Research Institute, Changjiang Water Resources Commission of the Ministry of Water Resources of China, Wuhan 430010, China; Hubei Key Laboratory of Water Resources & Eco-Environmental Sciences, Wuhan 430010, China. Electronic address: yuanzhe@main.crsri.cn., Chen X; College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China., Zhang D; College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, China., Chen F; Shaanxi Information Engineering Research Institute, Xi'an 710054, China.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Nov 15; Vol. 951, pp. 175589. Date of Electronic Publication: 2024 Aug 22.
DOI: 10.1016/j.scitotenv.2024.175589
Abstrakt: Terrestrial ecosystems have undergone significant changes as a result of climate change, profoundly affecting global carbon and water cycling processes. Notably, the synergistic changes in vegetation carbon use efficiency (CUE) and water use efficiency (WUE) and their response to patterns of climate change over the last 40 years are unknown. Therefore, in this study, global vegetation WUE and CUE were inverted using Gross primary productivity (GPP), Net primary productivity (NPP) and total evaporation (ET) data from 1981 to 2019 to reveal their temporal and spatial patterns of change through trend analysis and stability analysis. A stepwise regression algorithm was used to reveal the potential driving law of environmental factors on vegetation WUE and CUE. The results shows that (1) From 1981 to 2019, the global vegetation WUE and CUE showed in a relatively stable state, and the trends of WUE and CUE were -0.00004/year and 0.006 g C m -2  mm -1 /year, respectively; (2) the greening of vegetation was the most important cause of the changes in WUE and CUE, and the driving force of rain and heat conditions on the CUE of vegetation was smaller than that of solar radiation and soil water, the regions where CO 2 is the dominant factor affecting CUE and WUE are mainly in the north temperate zone; (3) the region of synergistic growth of WUE and CUE accounts for about 31.38 % of the global terrestrial area, and this pattern of change suggests that the global vegetation carbon sink potential is huge, and the popularization of vegetation planting patterns under the synergistic growth of CUE and WUE should be strengthened. The research has shown that vegetation greening is a key factor influencing changes in the WUE and CUE of vegetation, therefore, the implementation of ecological engineering will be an important step in combating climate change.
Competing Interests: Declaration of competing interest No conflict of interest exits in the submission of this manuscript, and manuscript is approved by all authors for publication. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously, and not under consideration for publication elsewhere. All the authors listed have approved the manuscript that is enclosed.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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