Comparison of Ostracoda (Crustacea) species diversity, distribution and ecological characteristics among habitat types
Külköylüoğlu, Okan; Yılmaz, Sinem; Yavuzatmaca, Mehmet
published: Apr 1, 2017
published online: Mar 16, 2017
manuscript accepted: Mar 1, 2017
manuscript received: Nov 13, 2017
ArtNo. ESP141019001005, Price: 29.00 €
Abstract To understand the relationship between habitat differences and ostracod species diversity, distribution and ecological characteristics, eleven different habitat types (spring, creek, stream, lake, waterfall, cave, puddle, pond, reservoir, trough, irrigation canal) across 162 aquatic bodies were sampled from July to September of 2012 in the Karabük and Düzce regions of Turkey. A total of 36 (Karabük) and 30 (Düzce) ostracod taxa were found from 148 out of 162 sites. All taxa are newly reported for Karabük whereas 16 species are new for Düzce. In Düzce, total numbers of species and sites were higher at altitudes 0 – 400 m and lower at altitudes 401–1200 m a.s.l. than in the Karabük region. However, they were equal at altitudes 1201–1400 m. Most species were found in troughs followed by streams, springs and ponds. Canonical Correspondence Analysis explains about 74 % of the relationships between species and environmental variables in both regions where water temperature was a significant (p < 0.01) predictor explaining the variance of ostracods assemblages. The most common five species (Candona neglecta Heterocypris incongruens H. salina Ilyocypris bradyi Psychrodromus olivaceus) with 4534 individuals comprise more than 67 % of the total abundance of all living ostracod species in both regions. Heterocypris incongruens showed the highest values of ecological optimum and tolerance for electrical conductivity and dissolved oxygen. Based on the occurrence patterns, UPGMA showed five clustering associations among the species. Results suggest that species habitat preferences may depend both on species ecological tolerance and optimum values and on the suitability of conditions in each of the habitat types sampled.