Temporal Changes in Land Use, Vegetation, and Productivity in Southwest China

Xuan Li, Li Rong (), Mengmeng Zhang, Wensong Yang, Zhen Zeng, Chengjun Yuan and Qi Wang
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Xuan Li: School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550000, China
Li Rong: School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550000, China
Mengmeng Zhang: School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550000, China
Wensong Yang: School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550000, China
Zhen Zeng: School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550000, China
Chengjun Yuan: School of Karst Science, Guizhou Normal University, Guiyang 550001, China
Qi Wang: School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550000, China

Land, 2022, vol. 11, issue 8, 1-18

Abstract: In recent decades, vegetation coverage and land use/land cover (LULC) have constantly changed, especially in southwest China. Therefore, it is necessary to conduct in-depth research into the temporal–spatial variation patterns of vegetation greening, LULC, and gross primary productivity (GPP). Here, we used remote sensing to analyze the spatial and temporal variation in the normalized difference vegetation index (NDVI) and GPP in the growing season under different LULCs in southwest China. Results showed: (1) From 2000–2019, the forest area in southwest China had increased by 2.1%, while the area of cropland and grassland had decreased by 3.2% and 5.5%, respectively. Furthermore, there are significant differences in spatial variation patterns. (2) NDVI and GPP in the growing season showed a general increasing trend ( p < 0.01); vegetation coverage is dominated by high coverage to highest coverage and medium coverage to high coverage transfer. (3) Under different LULCs, the migration directions of NDVI and GPP were different. The center of gravity migration of highest and medium coverage shifted to the southeast by 1.69° and to the northwest by 1.81°, respectively. The results showed the ecosystem evolution and will help to guide the maintenance measure of ecosystem balance and sustainable development.

Keywords: southwest China; normalized difference vegetation index (NDVI); gross primary productivity (GPP); land use/land cover (LULC); center of gravity shift model (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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