Relationships between some endemic taxa and environmental factors in Alpu (Eskişehir), Turkey

This study was carried out between 2011 and 2013 in Alpu environment of Eskisehir province. In the study, 38 sample areas (1 sample area is 200 m2) belonging to different vegetation types (forest, degraded forest or shrub and steppe) were specified, and some endemic taxa and environmental factors in these areas were determined. The decomposed soil samples were taken from 0 to 10 and 10 to 30 cm depth levels, and their physical and chemical analyzes were made. The relations between the endemic taxa and the presence/absence data of mainrock were analyzed by Pearson Chi-square test via SPSS program. The direction of the relationship was examined by using inter-specific correlation analysis. C3 formula was preferred in calculation of correlation coefficient. The endemic taxa data (presence/absence) and some environmental factors were quantitatively undergone analysis by Wilcoxon rank-sum test which is a nonparametric two-independent-samples test in SPSS program. In these analyzes, the ecological variables that are related to the growth environment desires of 10 endemic plant taxa have been identified. No relation between the four species and the environmental factors has been found. Convolvulus phrygius, Rhamnus thymifolius, Genista aucheri, Scabiosa pseudograminifolia, Sideritis gulendamiae, and Thymus leucostomus taxa have shown negative or positive relations with the mainrock, nitrogen, phosphorus, organic matter, pH, lime, silt, the amount of dust and clay, and with altitude, radiation index and slope which are from physiographical factors. Thus, it has been tried to determine the growing environment conditions that these species prefer.