An Investigation on the Flora of Ankara-Ahlatlıbel Dryland Range and Distributions of Some Important Range Plant Species

Abstract

The aim of this research was to determine the complete flora of Ahlatl ı bel dryland range, near Ankara and to investigate the distributions of the most abundant and important range plants. The results were analysed using chisquare and coefficient of dispersion methods. The analysis showed that the distributions of Stipa lagascae, Festuca ovina, Astragalus ovalis and Astragalus angustifolius were fıtted to the poisson distribution, while Poa bulbosa had a contagious distribution. Basal cover values of these fı ve experimental species varied between 5.93% for Festuca ovina and 0.56 for Astragalus angustifolius. 109 plant species belonging to 77 genera in 27 families were found in the experimental area. It was observed that 13 plant species In the experimental area were decreasers, comprising eight grasses, four legumes and one Rosaceae species. Nine species were increasers; four grasses and five from other plant families. Thus, a total of 22 plant species out of 109 were identified as climax plant species for this region. The presence of so many plant species in approximately 1.5 ha of land, and the small proportion of clirnax plant species indicated that the condition of this dryland range was poor. Besides this, it was observed that there was not expected improvement in the vegetation of this range rested for 25-30 years

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