Landscape pattern analysis of alpine steppe based on airborne hyperspectral imagery in Maduo county, Qinghai province

Abstract

Abstract: Landscape ecology has been widely used in grassland resource management and in ecological security evaluation. A multi-scale analysis of landscape statistics is very important for correlation with ecological processes. Acquiring features of landscape patterns from different grassland types with various fractional vegetation cover is one type of basic work in landscape scale analysis of grassland degradation. Extraction of small-scale landscape patterns from high resolution remote sensing is a useful attempt to carry out landscape-scale analysis. The present study analyzed different spectral characteristics of different grassland types and took precision grassland types mapping based on airborne high spatial resolution hyperspectral PIS imagery in Maduo county, Qinghai province. Metre-resolution landscape pattern differences in alpine steppe study areas with different fractional vegetation cover were explored through three landscape indices (landscape heterogeneity, landscape fragmentation and landscape dominance level). The results showed that landscape heterogeneity index and landscape dominance index are closely related to the level of fractional vegetation cover in alpine grassland. However, with reduced fractional vegetation cover of alpine steppe sample areas, fragmentation index initially decreased but then increased.

CLC Number:

S812-05

JIAO Quan-jun, ZHANG Bing, ZHAO Jing-jing, LIU Liang-yun, HU Yong. Landscape pattern analysis of alpine steppe based on airborne hyperspectral imagery in Maduo county, Qinghai province[J]. Acta Prataculturae Sinica, 2012, 21(2): 43-50.

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