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[1]MIAO Li,LU Qing,LIU Genlin,et al.Spatiotemporal Evolution Characteristics of NDVI of Different Vegetation Types and Its Response to Climate Factors on the Qinghai-Tibet Plateau from 1999 to 2019[J].Research of Soil and Water Conservation,2023,30(01):97-105.[doi:10.13869/j.cnki.rswc.2023.01.027]

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Spatiotemporal Evolution Characteristics of NDVI of Different Vegetation Types and Its Response to Climate Factors on the Qinghai-Tibet Plateau from 1999 to 2019

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 01 Page number: 97-105 Column: Public date: 2023-01-10

Title:: Spatiotemporal Evolution Characteristics of NDVI of Different Vegetation Types and Its Response to Climate Factors on the Qinghai-Tibet Plateau from 1999 to 2019

Author(s):: MIAO Li¹, LU Qing^1,2,3, LIU Genlin¹, WEI Xiaojian^1,3; (1.Faculty of Geomatics, East China University of Technology, Nanchang 330013, China; 2.Research Center of Resource and Environment Economics, East China University of Technology, Nanchang 330013, China; 3.Key Laboratory of mine Environmental Monitoring and Improving around Poyang Lake, ministry of Nature Resources, Nanchang 330013, China)

Keywords:: Qinghai-Tibet Plateau; NDVI; precipitation; temperature; correlation analysis

CLC:: Q948.12

DOI:: 10.13869/j.cnki.rswc.2023.01.027

Abstract:: To study the temporal and spatial variation characteristics of NDVI of different vegetation types in the Qinghai-Tibet Plateau, explore the response mechanism of NDVI of different vegetation types to climatic factors, and provide a certain basis for the ecological protection of the Qinghai-Tibet Plateau, based on the SPOT/VEG NDVI data, vegetation types and meteorological data from 1999 to 2019, linear trend analysis, Pearson correlation analysis and partial correlation analysis methods, the temporal and spatial changes of NDVI of different vegetation types on the Qinghai-Tibet Plateau from 1999 to 2019 were examined. The responses of different vegetation types to climatic factors were analyzed and discussed. The results showed that:(1)the overall vegetation on the Qinghai-Tibet Plateau was growing well, and the average NDVI of different vegetation types during the growing season was 0.6 for forest, 0.48 for shrub, 0.37 for meadow, 0.16 for grassland and 0.13 for alpine vegetation in descending order;(2)except for the slight degradation of alpine vegetation, other vegetation types had been significantly improved, and the proportions of improved areas were 58.46% for shrub(p<0.05), 52.78% for forest(p<0.05), 51.60% for meadow(p<0.05)and 32.65% for grassland(p<0.05);(3)the effects of climate factors on NDVI had obvious regional differences; average temperature had a more significant impact on NDVI in the growing season of the Qinghai-Tibet Plateau, and the impact range was broader; precipitation mainly affected the NDVI change of grassland, meadow and other vegetation in the northern part of the Qinghai-Tibet Plateau. It can be concluded that the NDVI change of vegetation in the growing season of the Qinghai-Tibet Plateau is more affected by average temperature than precipitation in the same period. These results can provide a scientific basis for the ecological protection of the Qinghai-Tibet Plateau and the formulation of a scientific and reasonable vegetation restoration strategy.

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Last Update: 2023-01-10