GE L L，JIAO Y H，ZHANG X F，et al. Characteristic and attribution of vegetation change in the Loess Plateau based on climate change and human factors [J]. Journal of Henan Polytechnic University( Natural Science), doi:10.16186/j.cnki.1673- 9787. 2024030039.  

Received：2024-03-13

Revised：2024-05-10

Online：2024-09-11

Characteristics and attribution of vegetation change in the Loess Plateau based on climate change and human factors (Online)

GE Liling¹，JIAO Yiheng²，ZHANG Xufei²，FANG Shijun¹

( 1. Henan Provincial Land and Space Survey and Planning Institute, Zhengzhou 450000, Henan, China; 2. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China)

Abstract: Objectives The Loess Plateau is an important part of China's ecological security. understanding the spatiotemporal changes of vegetation and climate control factors can provide a theoretical basis for the protection and restoration of the ecological environment. Methods The annual nuclear vegetation normalized Difference Index (kNDVI) was employed in this study to characterize vegetation coverage in the Loess Plateau of China from 2000 to 2022. Furthermore, the spatial-temporal characteristics of vegetation change were examined through trend analysis, stability analysis, and Hurst index prediction of vegetation coverage change. In addition, combined with meteorological data, partial derivative analysis was used to further quantify the contribution of climate change and human factors to kNDVI inter-annual variation. Results showed that: (1) In the past 23 years, the vegetation coverage increased at a rate of 0.0057/a, and the spatiotemporal heterogeneity of vegetation coverage was significant due to slope; (2) The prediction results of Hurst model reflected that the vegetation growth in most areas (79.04%) of the mining area showed an upward trend, and some areas (3.74%) showed a downward trend.  (3) The results of attribution showed that the average contributions of precipitation and temperature to kNDVI changes in the Loess Plateau were 0.00081/a and 0.00131/a, respectively. The influence of anthropogenic activities on vegetation activities was the most dominant, and the relative contribution rate to kNDVI change was 62.33% (the contribution rate of climate change was 37.67%). (4) The land use efficiency was dynamically represented by the increase of large-scale ecological afforestation projects, forest area, and vegetation coverage. On the contrary, urbanization had an adverse effect on vegetation growth. Conclusions This study improves our understanding of the dynamic vegetation response to climate and human activities in the Loess Plateau.

Key words：vegetation dynamics；climate change；human activities；attribution analysis；loess Plateau of China

CLC: P942