Investigation of relationships between plant biodiversity and environmental factors in the plant communities of Arid Ecosystems (Case study: Zirkouh of Qaen)
2009
Rostampour, M., M. Sc. Student of Range management, Faculty of Natural Resources,University of Tehran | Jafari, M., Professor, Faculty of Natural Resources University of Tehran | Farzadmehr, J., Assistant Prof., Faculty of Agriculture, University of Birjand | Tavili, A., Assistant Prof., Faculty of Natural Resources, University of Tehran | Zare Chahouki, M. A., Assistant Prof., Faculty of Natural Resources, University of Tehran
This study was carried out to investigate relationships between plant biodiversity and environmental factors in the plant communities of arid ecosystems in Zirkouh of Qaen. In this study, after reorganization of the plant communities, diversity, richness and evenness indices were determined in each community. Within each sample, one profile was dug and soil samples being taken at 0-20cm and 20-100cm depths. Physical-chemical characteristics were determined are texture, lime, organic matter, soil moisture content, saturation moisture, EC and pH. In total, 51 species representing 33 genera and 17 families were identified in this study. Phanerophytes (51.9 %) were the most abundant life form. Pearson correlation analysis indicated that soil texture, slope, elevation and annual mean precipitation were the most important environmental factors that were positively correlated with species richness and diversity. Soil moisture content and EC were the main factors correlated with species diversity negatively. Species evenness was significant positively correlated with sand, slope and elevation.
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