Dynamic change, driving mechanism and spatiotemporal prediction of the normalized vegetation index: a case study from Yunnan Province, China

Frontiers in Ecology and Evolution

Ecology and Evolution

Zhaoxiang Cao¹  Yilin Lin²  Yang Han²  Jinjiang Duan³  Peng Zhou⁴ 

[1] College of Marine Sciences, Shanghai Ocean University, Shanghai, China;Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, China;Key Laboratory of Geospatial Information Integration Innovation for Smart Mines, Kunming, China;Spatial Information Integration Technology of Natural Resources in Universities of Yunnan Province, Kunming, China;School of Geomatics and Spatial Information, Shandong University of Science and Technology, Qingdao, China;School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, China;

关键词: normalized vegetation index;    spatiotemporal distribution;    driving mechanism;    CA-Markov model;    Fourier function model;    prediction;   

DOI  :  10.3389/fevo.2023.1177849

 received in 2023-03-02, accepted in 2023-04-14,  发布年份 2023

来源: Frontiers

【 摘 要 】

Vegetation indexes have been widely used to qualitatively and quantitatively evaluate vegetation cover and its growth vigor. To further extend the study of vegetation indexes, this paper proposes to study the spatial and temporal distribution characteristics and specific driving mechanisms of vegetation indexes based on the example of Yunnan Province, China, and also adds the study of spatial and temporal prediction methods of vegetation indexes. This paper used data on this region’s normalized vegetation index (NDVI), three meteorological factors, and eight social factors from 1998 to 2019. The dynamic change in and driving mechanism of the NDVI were studied using mean value analysis, univariate linear trend regression analysis, and partial correlation analysis. In addition, the Fourier function model and the CA–Markov model were also used to predict the NDVI of Yunnan Province from 2020 to 2030 in time and space. The results show that: (1) The NDVI value in Yunnan Province is high, showing a significant growth trend. The increased vegetation coverage area has increased in the past 22 years without substantial vegetation degradation. (2) The positive promotion of meteorological factors is greater than the negative inhibition. The partial correlation of relative humidity among meteorological factors is the highest, which is the main driving factor. (3) The NDVI value is significantly positively correlated with population and economy and negatively correlated with pasture land and agricultural area. (4) The NDVI values are predicted well in time (R = 0.64) and space (Kappa = 0.8086 and 0.806), satisfying the accuracy requirements. This paper aims to enrich the theoretical and technical system of ecological environment research by studying the dynamic change, driving mechanism, and spatiotemporal prediction of the normalized vegetation index. Its results can provide the necessary theoretical basis for the simulation and prediction of vegetation indexes.

【 授权许可】

Unknown   
Copyright © 2023 Han, Lin, Zhou, Duan and Cao.