Dynamic monitoring of vegetation growth in Engebei ecological demonstration area based on remote sensing

Abstract

Vegetation growth and the ecological environment affect each other. Understanding vegetation growth trend and their spatial pattern evolution is of great significance for ecological environment assessment and protection. The spatial trend and pattern evolution of different vegetation growth in the ecological area are included in vegetation planning, which can be used as a reference for vegetation planning and development. Based on Landsat remote sensing data, the spatial evolution trend and dynamic evolution of vegetation patterns at different levels in the Engebei Ecological Demonstration Zone from 2000 to 2021 were revealed, and the degree of ecological vulnerability was determined. The results show that: during the growing season from 2000 to 2021, the vegetation growth of the study area showed an overall improvement trend (about 63.44%), and the vegetation growth trends was mainly not significant change (about 97.12%). The improvement of vegetation growth in the southern desert region was higher than that in the northern arid steppe region. In the future, the main growth types were non-significant improvement of sustainability, non-significant improvement of anti-sustainability, non-significant degradation of anti-sustainability, and non-significant degradation, accounting for 38.84%, 23.81%, 17.30%, and 17.16%, respectively. The spatial distribution of vegetation of different grades mainly showed aggregation patterns, and the spatial distribution evolvement was more and more uniform, the distribution range was gradually expanded, and the orientation was gradually weakened. The numerical clustering degree of ecological vulnerability of vegetation was constantly declining. The results can provide a scientific basis for vegetation planning in the Engebei ecological demonstration area.