Adıyaman ve Burdur (Türkiye) illerindeki tatlı su ostrakodlarının (Crustacea) morfolojik ve ekolojik özelliklerinin belirlenmesi: Coğrafik dağılımlarının karşılaştırmalı analizi

In order to compare species composition of non-marine ostracods and determine their distributional patterns and ecological preferences, 241 samples were collected from Adıyaman and Burdur provinces. In Adıyaman, 26 recent and 15 sub-recent taxa were reported from 111 of 120 ramdomly selected sampling sites. All of these taxa are new records for the region. Of which, Schellencandona insueta and Gomphocythere besni n. sp were reported for first time in Turkey and later is a new in literature. In Burdur, 22 recent and 13 sub-recent taxa were recorded from 110 of 121 ramdomly selected sampling sites. 21 of them are new for Burdur. The hypothesis "Ostracod species are ramdomly distributed among sampling sites" was accepted in Adıyaman (P > 0.05) while it was rejected for Burdur and both provinces (ADIBUR). According to Index of Dispersion (S2/μ) and d-statistics, ostracod species showed clump and regular distribution in Burdur and ADIBUR, respectively. The first two axes of Canonical Correspondence Analyses (CCA) in Adıyaman, Burdur and ADIBUR explained 77.4, 84.5 and 69.7 % of relationships between species and environmental variables, respectively. According to the CCA, water temperature was found as the most effective environmental variable on species. A direct effect of regional factors (e.g., elevation) could not be seen while local factors (e.g., pH, water temperature) have an important influence on the occurrence and distribution of species. Cosmopolitan species with high tolerance levels to different environmental variables were generally found as dominant in both provinces and in different aquatic bodies. With respect to the Alpha Diversity indices values of springs, ponds and creeks, they can be considered as the source habitats for ostracods but that should be investigated and tested in future studies. Besides the difference in the quality of species and habitats in both provinces, a significant difference (P < 0.05) was found between the mean elevation and water temperatures.