Yazar "Yavuzatmaca, Mehmet" seçeneğine göre listele
Listeleniyor 1 - 20 / 69
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe An annotated checklist of the non-marine ostracods (Crustacea) of Algeria with some ecological notes(Magnolia Press, 2017) Ghaouaci, Souad; Yavuzatmaca, Mehmet; Külköylüoğlu, Okan; Amarouayache, MouniaA total of 47 non-marine ostracods are listed from Algeria including both, the species reported in literature and those collected from 117 water bodies in humid, semi-arid and arid regions of Algeria between 2012 and 2016. Twenty seven taxa were identified with three species (Cypris pubera, Limnocythere inopinata, Potamocypris variegata) new to Algeria and nine taxa (Eucypris kerkyrensis, E. lilljeborgi, Heterocypris rotundata, Ilyocypris decipiens, I. cf. japonica, Isocypris beauchampi, Potamocypris smaragdina, P. villosa, Prionocypris zenkeri) as new reports for North Africa. Considering the presence of highly diverse water bodies, seasonal differences and difficulties of access to water sources, the number of species listed in here is believed to be underestimated. Further studies are required to complete this list.Öğe The aquatic diversity of ostracoda, phytoplankton and zooplankton from freshwater cave habitats in Turkey(British Cave Research Association, 2014) Külköylüoğlu, Okan; Yavuzatmaca, Mehmet; Karacaoğlu, Didem; Telli, MuratDuring this study, a total of 13 ostracod, 2 zooplankton and 43 phytoplankton taxa were recorded from 22 aqueous caves visited between 2010 and 2013 in Turkey. Whereas three ostracods (Candona cf. Candida, Eucypris sp., Potamocvpris sp.) were new records for caves in Turkey, two others (Ilyocypris cf. gibba and Pseudocandona eremita) were reported for the second time from Turkey. With the inclusion of these taxa, the number of freshwater ostracods reported from caves globally has increased to 68 taxa, although this is probably an underestimate of the total diversity. The records of two zooplankton species (Diacyclops bisetosus, Tropocyclops prasimts) found in Cumayani Cave (Zonguldak) is not surprising because of their cosmopolitan distribution and habitat preference characteristics. Among the phytoplankton, Bacillariophyta had the highest richness with 22 taxa followed by Cyanobacteria, Chlorophyta and Euglenophyta with 13, 6 and 2 taxa respectively. The results suggest that each cave has its own unigue biological diversity and species richness that should be recognized and studied in detail.Öğe Assessment of rarity and ecological preferences of the non-marine ostracods (Crustacea) in Çanakkale Province (Türkiye)(Springer Basel Ag, 2024) Yavuzatmaca, Mehmet; Kulkoyluoglu, Okan; Ataman, Alper; Aytegin, Ahmet; Yilmaz, Ismail OmerRarity as a multidimensional concept has not been discussed for the ostracods along with the effects of physicochemical factors and sedimentation rates of waters on their distribution. We randomly sampled 91 aquatic sites including eight habitat types in the & Ccedil;anakkale Province to study ostracod species rarity, commonness, and ecological preferences, and to test the relationships between the rarity index (average of geographic range, habitat specificity, and population size indices) and environmental factors. A total of 44 ostracod taxa (25 living) were reported from 75 sites. Among the species, Candonocypris caledonica was recorded for the first time in T & uuml;rkiye. Sixty percent of 25 living species exhibited cosmopolitan characteristics, making significant contributions to the diversity of ostracods. The well-known cosmopolitan species, Heterocypris salina (rr = 0.268), Cypridopsis vidua (rr = 0.289), Limnocythere inopinata (rr = 0.330), Ilyocypris bradyi (rr = 0.370), and Psychrodromus olivaceus (rr = 0.390), were identified as common species based on the rarity index (rr) values. Of the environmental variables, only sediment grain sizes (x2000, x500, and x63 mu m) were found to be effective on the distribution of ostracod species. The Shannon index exhibited a positively significant association with x2000, while the population size index displayed a linear relationship with x63 mu m grain size, indicating a small population size and rarity. Associations among index values, sediment grain size, and water quality variables showed that comprehensive studies on ostracods, analyzing both water and sediment, can provide a clearer and more precise information for evaluating the rarity and ecological preferences of species.Öğe Binary adsorption of Reactive Red 120 and Yellow 81 on Spirogyra majuscula(2013) Çelekli, Abuzer; Yavuzatmaca, Mehmet; Bozkurt, HüseyinBinary adsorption of Reactive Red (RR) 120 and Reactive Yellow (RY) 81 on Spirogyra majuscula was performed as function of initial dye concentration, pH regimes and contact time. Characterization of this alga was confirmed by FTIR spectrum. Increasing initial dye concentrations caused to increase (p<0.01) in dye uptakes. Pseudo second-order kinetic model was well to describe the adsorption behavior of reactive dyes. Freundlich and Redlich-Peterson models were more suitable for the adsorption of RR 120, while for the adsorption of RY 81, Langmuir was more appropriate model. Therefore, it could be concluded that the adsorption of RR 120 could be accomplished due to heterogeneous adsorption phenomenon, whereas the adsorption of RY 81 was due to a homogeneous adsorption with monolayer surface coverage. Despite adsorption of these dyes in binary system, this alga could be used as an adsorbent for textiles wastewater treatment without adding extra cost. © IDOSI Publications, 2013.Öğe Bioassessment of water quality of surface waters using diatom metrics(TUBİTAK Scientific & Technical Research Council Turkey, 2021) Çelekli, Abuzer; Lekesiz, Ömer; Yavuzatmaca, MehmetBioassessment of surface waters is one of the most important approaches to predict the deterioration of ecosystems and achieve environmental sustainability according to the application of the European Water Framework Directive. The present review emphasizes the importance of the bioassessment of freshwater quality especially running waters based on diatom metrics. Nutrient enrichment and hydromorphological alternation driven by human activities are the main factors for the ecological compromise of freshwater ecosystems. Currently, the bioassessment of the ecological condition of inland water bodies is adopted worldwide. Bioassessment is complementary to physicochemical and hydromorphological data for evaluating the ecological conditions of rivers; however, measuring all the physical and chemical changes is expensive and impractical. Therefore, monitoring biota helps to determine the changes occurring in ecosystems. Thus, diatoms are used as bioindicators to assess environmental conditions of the ecosystems, but their use requires great taxonomic knowledge, otherwise, the results will be biased. Many diatom indices have been developed based on the trophic weight and indicator values of diatoms in different ecoregions in the last decades. This review highlights the importance and advantages of using diatom metrics in the bioassessment of the ecological status of surface waters in the different ecoregions, especially running water. To analyze the complex response of diatom communities to environmental gradients and assess the quality of the ecosystem, multivariate statistical approaches are needed. The challenge here is how to define criteria for classes of water bodies in a biologically meaningful way. For this reason, biological condition gradient is suggested as an appropriate and effective approach to develop trophic criteria based on the relationships between nutrient concentrations and biological indicators of ecological conditions.Öğe Cave ostracoda (Crustacea) from western black sea region of Turkey(2011) Yavuzatmaca, Mehmet; Külköylüoğlu, Okan; Mengi, Hamdi; Sarı, Necmettin; Başak, ElifThe studies about cave ostracods in the world are limited but need more attention.Öğe Comparative analyses of non-marine ostracods (crustacea) among water basins in Turkey(Hungarian Natural History Museum, 2019) Yavuzatmaca, MehmetTotal of 26, 22 and 32 sites in Konya, Antalya and West Mediterranean basins in Turkey, respectively, were sampled twice during 2017 to compare the non-marine ostracod diversity. A total of 1787 individuals belonging to 31 species were recorded from all basins. Of which, nine species are common among basins when Fabaeformiscandona fragilis is new for Turkey. High species diversity was found at middle elevational intervals. The highest and lowest Shannon diversity index values were recorded for both Konya (H = 2.19) and Antalya (H = 1.90) basins, respectively. The highest beta diversities values are encountered between closed the Konya and other open basins. Species and environmental variables composition among basins and elevational intervals showed significant differences (p < 0.05, ANOSIM). Of species, cosmopolitans (e.g., Candona neglecta, Ilyocypris bradyi, Psychrodromus olivaceus) provide an important contribution to the differences in diversities among basins and elevational intervals. According to Canonical Correspondence Analysis, elevation appeared to be the common influential variables in all basins. Results suggest that alpha diversity is under the control of local and regional factors when beta diversity is primarily affected by regional factor. Although cosmopolitan species are positive indicators, they seem to make a significant contribution to alpha and beta diversities of ostracods.Öğe Comparative phylogenic analyses of cave-And surface-water Ostracoda from northwest Anatolia based on mitochondrial CO-I(British Cave Research Association, 2016) Telli, Murat; Külköylüoğlu, Okan; Bozdağ, Ozan Gönensin; Yavuzatmaca, MehmetThe class Ostracoda comprises one of the most diverse taxonomic groups within the subphylum Crustacea. Because of their unique community structure, species diversity and richness, ostracods can be used as indicator species of changes in aquatic conditions. In this study the phylogenetic relationships of 16 individual ostracods were investigated. Mitochondrial CO-I genes of eight species, belonging to six genera, collected from surface and cave environments were analyzed. Phylogenetic relationships were calculated using Bayesian, Maximum Likelihood (ML), and Neighbour Joining (NJ) methods, and the topology of all calculations were consistent with each other in that they showed a close phylogenetic relationship and monophyletic clustering within and between most individual genera of Heterocypris, Candona, Psychrodromus. Cave samples did not show clear separation from surface samples. Cave and surface species of the genus Candona are placed as sister groups in Bayesian and NJ trees, but are paraphyletic in ML. Cave and surface samples of Ilyocypris bradyi are sister groups in NJ but paraphyletic in ML and Bayesian analyses. © British Cave Research Association 2016.Öğe Comparison of Ostracoda (Crustacea) species composition between lakes and streams at high elevations in Turkey(Hungarian Natural History Museum, 2021) Yavuzatmaca, MehmetOstracods are one of the most suitable organisms because of their ecological and morphological preferences for habitat types to study the diversity between streams and lakes. In this study, 24 streams and 16 lakes were sampled in 2019 to evaluate the species compositions between streams and lakes. Environmental heterogeneity in the sense of the physicochemical variables was found among the habitats. 24 of the 29 species with 923 individuals were found in the lakes when 13 species with 898 individuals were found in the streams. Eight species were common in both habitat types. Species contributing about 70.81% to the significant differences in the species composition between the habitats showed cosmopolitan characteristics. Species variation among the replicates of lakes was higher than streams. Results indicated that the species composition was probably associated to dissolved oxygen and electrical conductivity in lakes and streams, respectively. Overall, results suggested that the determination of influential local factors (e.g., dissolved oxygen, electrical conductivity) in different aquatic bodies can provide important contributions to the estimation of which habitat types can be chosen by species and the use of species as bioindicators.Öğe Comparison of Ostracoda (Crustacea) species diversity, distribution and ecological characteristics among habitat types(E Schweizerbartsche Verlagsbuchhandlung, 2017) Külköylüoğlu, Okan; Yılmaz, Sinem; Yavuzatmaca, MehmetTo 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 Karabuk and Duzce regions of Turkey. A total of 36 (Karabuk) and 30 (Duzce) ostracod taxa were found from 148 out of 162 sites. All taxa are newly reported for Karabuk whereas 16 species are new for Duzce. In Duzce, 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 Karabuk 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.Öğe Correlational analyses of the relationships between altitude and carapace size of Ostracoda (Crustacea)(Edp Sciences S A, 2020) Dalgakıran, Enes; Külköylüoğlu, Okan; Yavuzatmaca, Mehmet; Akdemir, DeryaThe relationship between ostracods body size and altitude was studied from 117 aquatic habitats of Mersin province (Turkey). 72.6% of the relationship between 12 ostracods and five environmental variables was explained. Water temperature and pH were the two most effective variables on the species. The mean length of right and left valves of the species were significantly different (p < 0.01, N=3980) at all altitudinal ranges. A strong tendency of changes in valve height with increasing altitude seems to be more prominent than the changes in length for some species. To explore the relationship between ostracods carapace (body) size and altitude, 117 non-marine aquatic habitats were sampled from Mersin province (Turkey) during 03-09 October 2015. A total of 36 species and 14 sub-fossils were detected from 66 of 117 sites located between -3 m and 1630 m a.s.l. Thirty-four of the species are previously unknown in the province. In addition, four of the taxa were new records for the Turkish Ostracoda fauna. Five species (Ilyocypris bradyi, Heterocypris salina, H. incongruens, Psychrodromus olivaceus, Potamocypris fallax) were the most common among all habitats with relatively wide ecological and altitudinal ranges. Canonical correspondence analyses revealed 72.6% of the relationship between 12 ostracods and five environmental variables. Water temperature and pH were the two most influential variables (p < 0.05) on the species. The mean length of right and left valves of the species were significantly different (p < 0.01, N = 3980) at all altitudinal ranges. A strong tendency of changes in valve height with increasing altitude seems to be more prominent (p < 0.05) than the changes in length for some species. Our results do not support some ecological rules but rather, suggest that a linear relationship between carapace size and altitude may only be applicable for some ostracods.Öğe Correlational patterns of species diversity, swimming ability and ecological tolerance of non-marine ostracoda (Crustacea) with different reproductive modes in shallow water bodies of agri region (Turkey)(Taylor & Francis Inc, 2019) Külköylüoğlu, Okan; Yavuzatmaca, Mehmet; Akdemir, Derya; Yılmaz, Ozan; Çelen, Ebru; Dere, Şükran; Dalkıran, NurhayatA total of 52 ostracod taxa (35 live spp. 17 subfossils) were collected from 70 shallow aquatic bodies with 11 different habitat types in Agri province (Turkey). Fabaeformiscandona acuminata is a new record for the Turkish ostracod fauna while 29 species were new for the province. Three types of habitats (stream, ditch and pond) contained the highest numbers of 24, 15, 11 species, respectively. Species were clustered into four main groups based on their distribution among habitats. Canonical Correspondence Analysis was able to explain 73.9% of the correlation between the 18 most frequently found species and five environmental variables. Water temperature and elevation were found to be the most effective factors on ostracods. Species with and without swimming setae tend to be found mostly in lentic and lotic habitats, respectively. Besides, species with swimming setae showed relatively higher ecological optimum and tolerance values for pH, electrical conductivity and water temperature than species without setae. The numbers of non-swimmer sexually reproducing species were twice the number of parthenogenetic species. Parthenogenetic species tend to have higher tolerance and optimum values for different environmental variables than sexual species. Results suggest a strong correlation among reproductive modes, swimming ability and ecological tolerances of the species.Öğe Cypria lacrima sp nov a new ostracoda (Candonidae, Crustacea) species from Texas, USA(Biodiversity Research Center, Acad Sinica, 2017) Külköylüoğlu, Okan; Akdemir, Derya; Yavuzatmaca, Mehmet; Schwartz, Benjamin F.; Hutchins, Benjamin T.A new ostracod species, Cypria lacrima sp. nov. (Cyclocypridinae) is proposed from an artesian well in Hays County, Texas, U.S.A. The species differs from its conspecies with the following characteristics: unique shape and pit ornamentation on carapace, absence of "e" and "g" setae on both walking and cleaning legs, long gamma seta on Mandibular palp, asymmetric clasping organs and differences in the shape and size of other cheatotaxial parts. A detailed comparison among the species of the genus is provided along with ecological implications. This report increases the geographic distribution of the genus in the southern USA.Öğe Description of a new species (Eucypris dorlionensis n. sp.) (Ostracoda, Crustacea) from Türkiye and a cladistic analysis of the genus Eucypris(Tubitak Scientific & Technological Research Council Turkey, 2024) Batmaz, Filiz; Külköylüoğlu, Okan; Yavuzatmaca, MehmetThis is the first clustering analysis of the 53 species of the genus Eucypris where we used 28 plesiomorphic and apomorphic character states in the Winclada/NONA program. Accordingly, Eucypris dorlionensis n. sp. was clustered within Group 2, in which the new species was clearly separated from the other species of the genus based on the shape of the carapace, presence of fine hair -like setae on the carapace surface, the position of the maximum height of the carapace, and length ratio of terminal claws of the second antenna. Eucypris dorlionensis n. sp. was collected from a trough in Eskisehir province in Turkiye where this is the first new species description of the genus that the number of species of the genus has now increased to 10. Besides, the genus is of cosmopolitan distribution known from a variety of aquatic bodies in the world. Including the new species, the number of the species has now raised to 56.Öğe Description of a new tribe Cabralcandonini (Candonidae, Ostracoda) from karst aquifers in Central Texas, USA(Natl Speleological Soc, 2019) Külköylüoğlu, Okan; Yavuzatmaca, Mehmet; Akdemir, Derya; Schwartz, Benjamin F.; Hutchins, Benjamin T.Cabralcandonini tribe n., with the type genus Cabralcandona gen. n. from an artesian well in the San Marcos, Texas (U.S.A.) and six other genera from karst aquifers in Texas, is proposed as a new tribe of the subfamily Candoninae (Candonidae) (Crustacea, Ostracoda). The new tribe and genus have morphological features that distinguish them from other members of the subfamily. The most diagnostic characteristics of the type genus are (1) two horn-like structures developed on the antero- and postero-dorsal margins of the left valve, (2) numbers of central muscle scars, (3) hexagonal or pentagonal (honeycomb-like) ornamentation on the subrectangular shaped carapace, (4) four segmented second antenna in both sexes, (5) absence of an exopod on A2, (6) shape and size of Y aesthetasc, (7) absence of e, f and g setae on cleaning leg, (8) flagellum (whip-like) uropod morphology, (9) shape of hemipenis, and (10) reduction in number of segments and setae on other limbs. Taxonomic keys for the tribes of the subfamily Candoninae including Cabralcandonini tribe n. are presented.Öğe Determination of ecological statuses of streams in the Ceyhan River Basin using composition and ecological characteristics of diatoms(Springer, 2024) Lekesiz, Ömer; Çelekli, Abuzer; Yavuzatmaca, Mehmet; Dügel, MuzafferThe present study aimed to evaluate the interactions between diatoms and ecological factors in various streams and to test the suitability of diatom indices to evaluate the ecological status of 44 streams in the Ceyhan River Basin during the spring and autumn periods of 2021 and the summer of 2022. Canonical correspondence analysis indicated the significant effects of electrical conductivity (EC), dissolved oxygen, biological oxygen demand (BOD5), total phosphorus (TP), and total nitrogen (TN) on the distribution of diatom species of streams in the Ceyhan River Basin. Of the streams, Aksu and Erkenez streams were associated with high EC, BOD5, and TP and characterized by pollution-tolerant species. Pollution-sensitive species showed close integration with Aksu Spring Brook, Gözpınar Creek, Göksun Creek, and Yeşilgöz Spring Brook, which related to a high dissolved oxygen gradient. Different eco-regional diatom indices displayed different scores, representing from bad to high ecological status in the Ceyhan River basin. Among the diatom indices, Trophic Index Turkey (TIT) proved to be the more suitable metric to assess the ecological status of streams. TIT indicated deterioration of water quality in Karasu (S06), Erkenez (S07) streams, and downstream areas of the Ceyhan River and the least distributed sampling stations in the basin. Results suggested that eco-regionally developed diatom indices, like TIT, are required to more accurately assess the ecological status of streams in the Mediterranean region. The study provides a fundamental assessment of the ecological status of streams in the Ceyhan River Basin using an appropriate diatom index before the Pazarcık-centered earthquake on February 6, 2023. Findings allow someone to assess the impact of the earthquake on diatom communities and ecological factors in the region in the future studies. © The Author(s) 2024.Öğe Determination of environmental variables groups affecting the occurrence of non-marine ostracods (Crustacea) in the Eastern Mediterranean region of Turkey(SPRINGER, 2022) Yavuzatmaca, MehmetAbiotic factors play important roles on the habitat preferences and dispersal decisions of species. The objective of this study was to estimate the groups of abiotic variables best explaining the variation of ostracods species taken from 31 water bodies (27 streams and 4 lakes) sampled twice (October 2020 and April 2021) in the Eastern Mediterranean region of Turkey. In this study, a total of 34 ostracod taxa (24 recent and 10 sub-fossil) were reported, and Ilyocypris bradyi and Prionocypris zenkeri were the most common species occurred more than 10 times. Based upon to the variation partitioning analysis, dissolved oxygen+elevation+magnesium (DO+Elev+Mg2+) was the best model with 12.66% explanation power in the variations of ostracod species in the present study. The distance-based redundancy analysis elucidated 14.1% of the total variation in the species distribution matrix that was significantly affected by Mg2+ and Elev. The effectiveness of variables on the occurrence of species was tested by Generalized Linear Models resulted in positive roles of Elev for Psychrodromus olivaceus, Neglecandona neglecta and Pseudocandona albicans, Ca2+ for Cyprideis torosa and P. albicans, and DO for P. olivaceus, but negative roles of Tw for N. neglecta and P. albicans, Ca2+ for Herpetocypris helenae, and DO for N. neglecta. A positively significant association was found between high Mg2+ values and the abundance of P. zenkeri. Results suggest that effectiveness rates of environmental factors on the occurrence of species can change according to ecoregional differences when the variables are evaluated in the analyses together. Therefore, especially ecoregion-based ecological information of species should be determined for better inferences about the ecological preferences of species.Öğe Determination of morphological and ecological features of freshwater ostracods (Crustacea) in Adiyaman and Burdur (Turkey): A comparative analysis of geographical distribution(Bolu Abant İzzet Baysal Üniversitesi, 2015) Yavuzatmaca, Mehmet; Külköylüoğlu, OkanDenizel olmayan ostrakod tür kompozisyonunu karşılaştırmak ve dağılım desenleri ve ekolojik tercihlerini belirlemek amacıyla 241 numune Adıyaman ve Burdur illerinden toplanmıştır. Adıyaman'dan 41 taksa (26 güncel, 15 güncel-olmayan) rastgele seçilmiş 120 örnekleme yerinin 111'den tespit edilmiştir. Bu taksonların tümü bölge için yeni kayıttır. Bunlardan Schellencandona insueta ve Gomphocythere besni n. sp. Türkiye de ilk defa rapor edilmiş ve G. besni n. sp. ise literatür için yenidir. Burdur'dan 121 rastgele seçilmiş örnekleme yerinin 110'un dan 35 taksa (22 güncel 13 güncel-olmayan) kayıt edilmiştir. Bunlardan 21 tanesi Burdur için yeni kayıt. "Ostrakod türleri örnekleme yerleri arasında rastgele dağılmışlardır" hipotezi Adıyaman'da kabul edilmiş (P > 0.05) iken Burdur ve iki ilin verileri (ADIBUR) için kabul edilmemiştir (P < 0.05). Dağılım İndeksi (S2/?) ve d-istatistiks'e göre Burdur ve ADIBUR'da ostrakodların dağılım desenleri sırasıyla kümesel ve düzenli olarak bulunmuştur. Kanonik İlişki Analizi (CCA)'nin ilk iki ekseni Adıyaman, Burdur ve ADIBUR'da sırasıyla türler ve çevresel değişkenler arasındaki ilişkinin % 77.4, 84.5 ve 69.7'ni açıklamıştır. CCA'ne göre su sıcaklığı tür dağılımı üzerindeki en etkili çevresel değişken olarak bulunmuştur. Lokal faktörlerin (örneğin, pH, su sıcaklığı) türlerin bulunması ve dağılımı üzerinde önemli bir etkisi varken, bölgesel faktörlerin (örneğin, yükseklik) doğrudan bir etkisi görülememiştir. Genel olarak kozmopolitan türler iki ilde ve farklı sucul ortamlarda farklı çevresel değişkenlere gösterdikleri yüksek toleransları ile baskın olarak bulunmuşlardır. Alfa çeşitlilik indeks değerlerine göre kaynaklar, havuzcuklar ve küçük derelerin ostrakodlar için kaynak konumlu habitatlar olabileceği düşünülmektedir. Fakat ileriki çalışmalarda bu irdelenmeli ve test edilmelidir. Her iki ilde ki tür ve habitat kalitelerinin yanı sıra, önemli (P < 0.05) bir fark ortalama yükseklik ve su sıcaklıkları arasında da bulunmuştur.Öğe Determination of ostracoda (Crustacea) fauna of some freshwater caves in the western Black Sea region of Turkey(Bolu Abant İzzet Baysal Üniversitesi, 2011) Yavuzatmaca, Mehmet; Külköylüoğlu, OkanBu çalışmada Cypridoidea üst familyasına ait 9 taksa, Batı Karadeniz Bölgesindeki 11 mağarada örneklenen 17 istasyondan tespit edilmiştir. Bu taksalar arasında 8 tanesi (Ilyocypris bradyi, I. inermis, Candona neglecta, Ilyocypris sp., Candona sp., Psychrodromus sp. Pseudocandona sp., ve Heterocypris sp.) mağara içlerinde ve girişlerinde, bir takson ise (Psychrodromus olivaceus) sadece Çayırköyü mağarasının dışında kaydedilmiştir. Ağırlıksız Çiftli Grup Ortalama Analizi, örneklenen istasyonları fiziksel ve ekolojik karakterlerine göre ve % 85 benzerlik oranı ile üç ana gruba ayırmıştır. Buna göre birbirine bölgesel olarak yakın olan istasyonların benzerliği görülmüştür. Bu çalışmada rapor edilen türler (I. bradyi, I. inermis ve C. neglecta) kozmopolitan dağılım göstermektedir. Bu nedenle, bu türler kapalı ortamlara ve sel gibi dış olaylarla değişen ekolojik değişmelere adapte olma ve bu değişimleri tolere etme şanslarına sahiptirler. Bu dokuz taksa arasında I. bradyiI. inermis ve C. neglecta türlerinin canlı ve ergin bireyleri mağara ve ortamlarından ilk kez bu çalışmada bildirilmiştir. Bunlara ek olarak, diğer dört takson (Ilyocypris sp., Candona sp., Heterocypris sp., ve Pseudocandona sp.)'da Türkiye'nin mağara Ostrakoda faunası için yeni kayıttır.Kelimeler: Ostrakoda, mağara, kozmopolitan, dağılım, ekolojiÖğe Determining diagnostic characteristics of the nonmarine Ostracoda (Crustacea) and their habitat selection with unique functional traits in the Kastamonu province (Türkiye)(Elsevier GmbH, 2024) Külköylüoğlu, Okan; Yavuzatmaca, Mehmet; Tunoğlu, Cemal; Tunçkol, BilgeNonmarine ostracods are widely distributed in a variety of aquatic habitats, from mountain lakes to underground waters, where each species tends to show species-specific habitat preferences with unique functional traits to increase their survival chances. To understand the patterns of such a relationship between habitat preferences and functional traits of the species, 101 different aquatic sites in the Kastamonu province (Türkiye) were randomly sampled during August 2023. A total of 39 ostracods (20 species, 19 unnamed taxa) were encountered from 49 sites. Seventeen species are new reports for the province. Among them, six species are the most common species with cosmopolitan (or cosmoecious) characteristics. The contribution of these species to the diversity of alpha species (p < 0.05) was more than 90 %. The species with relatively high ecological tolerances generally unveiled low-optimum estimates. Canonical correspondence analysis explained 62.5 % of the correlation between environmental variables and species in which redox potential, electrical conductivity, calcium, and pH were found to be the most related variables to the species (p < 0.05). Fundiversity analysis showed that the presence of swimming setae was correlated with high values of functional diversity, functional richness, and functional distribution of species among five elevation ranges. The results of the habitat selection index and the standardized selection index coincided with the functional traits of the most common species. The species characterized by their habitat selection can be considered as diagnostic species of those specific habitats. Among them, Neglecandona neglecta, reported primarily from dams, springs, and troughs, is considered a typical diagnostic species of these habitats, while Cypridopsis vidua found in lakes and dams can be used as an indicator species for these types of lentic habitats. Similarly, three species (Heterocypris incongruens, Ilyocypris bradyi, Psychrodromus olivaceus) can play a critical role as diagnostic species in troughs but reporting them from different habitats such as ditches and rivers / lakes (I. bradyi) and dams (P. olivaceus and H. salina) indicated their wide range of habitat preferences. Hence, the results suggest that the occurrence of diagnostic species seems to correspond to certain habitat types and their functional traits. © 2024 Elsevier GmbH
