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[Landscape stability and its pattern transition in Jinghe watershed]
1Institute of Geographical Sciences and Natural Resources Reseach, Chinese Academy of Sciences, Beijing 100101, China. xiegd@igsnrr.ac.cn
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|December 17, 2005
Summary
Landscape patterns in the Jinghe watershed remained stable, dominated by grassland and arable land. A policy shift in 2000 improved landscape quality, indicated by increased NDVI values and grassland dynamics.
Area of Science:
- Environmental Science
- Geography
- Remote Sensing
Background:
- The Jinghe watershed on the Loess Plateau faces severe soil and water erosion.
- Understanding landscape change is crucial for ecological restoration in vulnerable regions.
Purpose of the Study:
- To analyze landscape change patterns in the Jinghe watershed over 15 years.
- To assess the impact of land use policies on landscape quality.
Main Methods:
- Remote sensing and Geographic Information Systems (GIS) were employed.
- Analysis of landscape structure, spatial-temporal changes, and NDVI trends.
Main Results:
- Landscape structure remained stable, dominated by grassland and arable land (85%).
- Complex inter-transitions between landscape types occurred, with grassland degradation and improvement observed.
- Spatial indices showed increasing dominance and contagion, decreasing fractal dimension, and increasing patch density.
- Temporal analysis indicated landscape fragmentation, but NDVI values improved post-2000 policy implementation.
Conclusions:
- The Jinghe watershed's landscape structure is relatively stable but exhibits complex dynamics.
- Land use policy changes since 2000 have positively impacted landscape quality and vegetation cover.
- Continued monitoring is essential to manage soil and water erosion and enhance ecological resilience.