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    Assessment of surface water quality in the atikhisar reservoir and sarıçay creek (Çanakkale, Turkey)
    (Cevkor Vakfi, 2010) Akbulut, Mehmet; Kaya, Hasan; Çelik, Şanver; Odabaşi, Deniz Anil; Sa?ir Odabaşi, Serpil; Selvi, Kahraman
    This study was carried out to evaluate the surface water quality of the Atikhisar Reservoir and Sari{dotless}çay Creek. Multivariate statistical techniques such as cluster analysis (CA), principal component analysis (PCA), multidimensional Scaling (MDS), and univariate statistical techniques such as two-way ANOVA were used to analyze the data. Three different groups were formed based on Cluster analysis. Two-way ANOVA test results showed that interaction effects of any variables of the reservoir were non-significant but the interaction effects of pH in the creek were significant. Temperature (T), electrical conductivity (EC), oxygen saturation (OS), biological oxygen demand (BOD), chemical oxygen demand (COD), total phosphate (TP), total nitrate (TN), salinity (Sal), pH, Chl-a, and total suspended solids (TSS) of the reservoir were significantly different among seasons. While differences of T, EC, DO, TP, Chl-a, and TSS of the Sari{dotless}çay Creek were significant among seasons, only the differences of temperature among the stations were significant. Multi dimensional scaling (MDS) analysis results revealed that the variables such as EC, Sal, OS, T and TN affected the differences among the sites, while the other variable groups were showing a similarity with the COD, BOD, TSS, AD, TP, pH, DO and Chl-a. The principle component analysis (PCA) results showed that the eigenvalues of the first 5 PCA were larger than 1.00, suggesting that they explained 98 % of the total variation.
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    Bythinella kazdaghensis sp. n. (Gastropoda: Rissooidea) from the Mount Ida (Kaz Da?i), Northwestern Turkey
    (Bulgarian Academy of Sciences, 2014) Odabaşi, Deniz Anil; Georgier, Dilian G.
    Bythinella, a highly diverse rissooidean genus, has a wide distribution area from the Iberian Peninsula to Asia Minor. More recent research about this genus revealed many taxa especially in the Balkan region. However, very few records were known from Turkey. This study aimed to describe a new species: Bythinella kazdaghensis sp. n. from the Mount Ida (Kaz Da?i) in Northwestern Turkey. Bythinella kazdaghensis sp. n. was compared with the species of Turkey and Greece as well. This new species was found to be similar to B. turca (Radoman, 1976) in terms of shell height.
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    Description of a new pseudobithynia n. sr (Gastropoda: Bithyniidae) from Northwest Turkey
    (2013) Odabaşi, Deniz Anil; Kebapçi, Ümit; Akbulut, Mehmet
    The Family Bithyniidae widely distributed in the Balkans and is represented by two genera in Europe: Bithynia and Pseudobithynia. More recent data about the Bithyniidae shows that the majority of family members are distributed in the Balkans and especially Greece. Seven species of Bithynia but only one of Pseudobithynia is currently known from Turkey. This study is aimed at describing a new species, Pseudobithynia yildirimi n. sp.from the Biga Peninsula in northwestern Turkey. Pseudobithynia yildirimi n. sp. is compared to related taxa in Turkey, as well as in Greece and neighbouring Iran. The penis variability and status of pseudo-maleness in P. yildirimi were also investigated.
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    Description of a new subterranean nerite: Theodoxus gloeri n. sp. with some data on the freshwater gastropod fauna of Balikdami Wetland (Sakarya River, Turkey)
    (Centre for Biodiversity of Montenegro, 2015) Odabaşi, Deniz Anil; Arslan, Naime
    In the present study, conducted between 2001 and 2003, four taxa of aquatic gastropoda were identified from the Balikdami Wetland. All the species determined are new records for the study area, while one species Theodoxus gloeri sp. nov. is new to science. Neritidae is a representative family of an ancient group Archaeogastropoda, among Gastropoda. Theodoxus is a freshwater genus in the Neritidae, known for a dextral, rapidly grown shell ended with a large last whorl and a lunate calcareous operculum. Distribution of this genus includes Europe, also extending from North Africa to South Iran. In Turkey, 14 modern and fossil species and subspecies were mentioned so far. In this study, we aimed to uncover the gastropoda fauna of an important Wetland and describe a subterranean Theodoxus species, new to science.
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    Seasonal distribution and composition of benthic macroinvertebrate communities in menderes creek, Çanakkale, TURKEY
    (2009) Akbulut, Mehmet; Çelik, Ekrem Şanver; Odabaşi, Deniz Anil; Kaya, Hasan; Selvi, Kahraman; Arslan, Naime; Odabaşi, Serpil S.
    Seasonal changes of proportional distribution, biotic indices, abundance, and frequency of benthic macroinvertebrate communities in Menderes Creek were investigated at 5 stations between November 2005 and July 2006. The fauna included a total of 87 taxa belonging principally to Insecta (52 taxa, especially Chironomidae), Oligochaeta (12 taxa), Mollusca (11 taxa), Hirudinae (7 taxa), and Malacostraca (5 taxa). Mean density was estimated to be 778 individuals m-2 for the 87 taxa. Mollusca (38.5%) and Insecta (39.9%) are the dominant groups among the macroin-vertebrate assemblages. Average Shannon-Wiener diversity index was calculated as 1.41, average Margalefs richness index was 1.27, and average Pielou index was 0.61. The results of one-way analysis of similarity (ANOSIM) indicated that macroinvertebrate compositions were significantly different between sampling sites (p> 0.05). ANOSIM and similarity percentage analysis (SIMPER) revealed significant differences and a high degree of community dissimilarity within and between the sampling stations.