A method for assessing evergreen habitats using phytodiversity and geospatial techniques in tropical rain forests of Southern Western Ghats (India)
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- 作者：A. Giriraj (1) (4)
M. S. R. Murthy (1)
B. R. Ramesh (2)
C. B. S. Dutt (3) - 关键词：Evergreen forests ; Remote sensing ; Species assemblages ; Endemism ; Conservation zones ; Western Ghats
- 刊名：Ecological Research
- 出版年：2009
- 出版时间：July 2009
- 年：2009
- 卷：24
- 期：4
- 页码：749-760
- 全文大小：677KB
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M. S. R. Murthy (1)
B. R. Ramesh (2)
C. B. S. Dutt (3)
1. Forestry and Ecology Division, National Remote Sensing Agency, Hyderabad, 500 037, India
4. Department of Biogeography, Universit?t Bayreuth, Bayreuth, Germany
2. Department of Ecology, French Institute of Pondicherry, Pondicherry, 605 001, India
3. ISRO Head Quarter, Antariksh Bhavan, New BEL Road, Bangalore, 560 094, India
文摘
We have used data generated using remote sensing and geographical information systems to categorize habitats, and then determined the relationship between the habitat categorizations and species-distribution patterns. A biologically rich hotspot—Kalakad-Mundanthurai Tiger Reserve, located at Southern Western Ghats, India, was chosen for this study. In order to spatially delineate areas of high species richness/diversity and endemic habitat zones, we have identified evergreen habitats in conjunction with landscape metrics, species assemblage, micro-habitats like slope, topography, species endemism, and proportion of core and edge species. A total of 236 species and 2,920 individuals were recorded using systematic stratified plots of 0.1?ha covering 47 plots. Hierarchical cluster analysis was done using Ward’s method. Plot information was used to identify clusters based on species density. The analysis showed five species assemblages that are quite distinct from each other in terms of dominant species. The distribution of endemic and edge species, land cover heterogeneity, and continuity of patches in these clusters were evaluated to understand the degree of disturbance and intactness at landscape scale. Integration of species assemblages and topography brought out four major elevation-slope complexes. Information on species composition (robust field survey) with spectral (hybrid classification) properties has shown 72% overall accuracy and distinguished four evergreen sub-groups and other land cover classes. The developed approach assumes great importance in the assessment of biodiversity and prioritizing the areas of conservation.