Limitations of soil moisture and formation rate on vegetation growth in karst areas.

Autor: Zhang S; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, Guizhou Province, China., Bai X; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, Guizhou Province, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, Shanxi Province, China. Electronic address: baixiaoyong@vip.skleg.cn., Zhao C; School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, Guizhou Province, China., Tan Q; School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, Guizhou Province, China., Luo G; Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed, Guizhou Education University, Guiyang 550018, China., Cao Y; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China., Deng Y; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China., Li Q; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China., Li C; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China., Wu L; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China., Wang J; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China., Chen F; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China., Xi H; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China., Ran C; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, Guizhou Province, China., Liu M; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, Guizhou Province, China.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2022 Mar 01; Vol. 810, pp. 151209. Date of Electronic Publication: 2021 Nov 06.
DOI: 10.1016/j.scitotenv.2021.151209
Abstrakt: Vegetation changes in karst areas are controlled by the soil formation rate (SFR) and soil moisture (SM). However, little is known about their thresholds and global control patterns. To this end, based on high-precision climate and vegetation data for 2000-2014, using Pearson correlation analysis, the Hurst index, and change-point analysis, the thresholds of the SFR and SM in vegetation growth in karst areas were identified. Furthermore, a spatial map (0.125° × 0.125°) of the global karst ecosystem with a static/dynamic limitation zone was established. We found that the net primary productivity (NPP) in 70% of the global climate zones exhibited a dual restriction relationship with the SM and SFR. The limitations of the SFR and SM in vegetation growth were most obvious in subpolar and semi-arid climates. In addition, their ecological thresholds were 25.2 t km -2  yr -1 and 0.28 m 3  m -3 , respectively. The static limitation of the SFR on the NPP in karst areas accounted for 28.37%, and the influence of the SM enhanced this limit (21.79%). The limitation of the SFR on vegetation was mainly concentrated in Boreal forests (17%), and the limitation of the SM was mainly concentrated in tropical savannas (12%). The NPP and the Normalized Difference Vegetation Index (NDVI) were the most sensitive to changes in the SM and SFR. Moreover, the analysis based on 14 ecologically limitation karst areas further revealed that the reduction in these factors may cause the tropical rain forest to experience degradation. It can be seen that the SM enhanced the limiting effect of the SFR on vegetation in karst areas. In short, this interpretation of karst vegetation limitations provides a deeper understanding of and approach to ecosystem evolution and vegetation restoration in these regions.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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