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- Title
塔里木盆地南缘植被NPP时空变化特征及驱动因素——以和田地区为例.
- Authors
沈文婕; 王双成; 刘 溢; 张晓凡; 刘 勤; 郑天亮; 杨晴雯; 裴向军; 李景吉
- Abstract
[Objective] The study aimed to analyze the spatial and temporal changes of NPP and its drivers in arid desert areas to provide scientific evidence for revealing the mechanism of vegetation change in sensitive areas, [Method] Based on MODI 7 A3 data, the trend analysis, coefficient of variation and correlation analysis were used to investigate the characteristics of spatial and temporal changes in NPP and its drivers in Rotan area from 2000 to 2020. [ Result] ( i) From 2000 to 2020, the NPP in Rotan area showed an overall trend of fluctuation and increase, with a spatial distribution of ' strips', (ii) The variation trend of NPP was improved with 95, 90% of the vegetated areas greater than zero, with higher volatility and lower stability in NPP, (iii) NPP in Rotan area showed a positive correlation with precipitation and a weak negative correlation with temperature, and the 67, 51 % of NPP in vegetated areas driving by non-climatic factors, with the precipitation playing a stronger role than temperature among the climatic factors. (iv) Changes in land use types showed a decrease in barren and scrubland and an increase in grassland, permanent snow and ice, cropland and water bodies, with shifts between land use types having a predominantly positive effect on NPP. In two decades, the conversion of barren land to grassland was the most important direction of land use transfer in Holan area, and the vegetation NPP mostly showed an increasing trend in this area. [ Conclusion] The changes in NPP were influenced by a combination of climatic factors and human activities, and the positive effect of ecological engineering on vegetation was the main reason for the increase in NPP in Holan area.
- Subjects
CLIMATE change
- Publication
Southwest China Journal of Agricultural Sciences, 2023, Vol 36, Issue 10, p2108
- ISSN
1001-4829
- Publication type
Article
- DOI
10.16213/j.cnki.scjas.2023.10.005