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Öğe Amathillina cristata Sars 1894, a Ponto-Caspian amphipod genus newly recorded from Turkey (Amphipoda: Gammaridae)(Max Kasparek Verlag, 2010) Ozbek, Murat; Ozkan, Nurcan[Abstract Not Available]Öğe Analysis of Benthic Macroinvertebrates in Relation to Environmental Variables of Lake Gala, a National Park of Turkey(Central Fisheries Research Inst, 2010) Camur-Elipek, Belgin; Arslan, Naime; Kirgiz, Timur; Oterler, Burak; Guher, Huseyin; Ozkan, NurcanIn order to determine the relationships between the dynamics of benthic macroinvertebrates (both species number and individual number) and environmental variables, sampling was made at four different stations at monthly intervals during a year between March 2004 and January 2005 of Lake Gala which is a part of an important wetland and a national park in European part of Turkey (Enez/Edirne). Altogether, a total of 49 zoobenthic taxa which were grouped as Oligochaeta, Chironomidae, and Varia, comprised of 1,628 individuals in per m(2) at average were recognised in the sampling stations of the Lake. The present study showed that larval chironomids comprising 57% abundance of the total specimens are the biggest part of benthic macroinvertebrates. It is followed by oligochaetes and the group varia comprising 34% and 9% abundance, respectively. Also, it was seen changing that the composition of zoobenthic group dominancy in the Lake as time passes. Furthermore, according to Shannon-Wcaner index, species diversity for zoobenthic macroinvertebrate fauna of the lake was found as H'=1.21 at average. Also, similarities of the sampling stations and months, both the dynamics of benthic macroinvertebrates and physicochemical features were evaluated by using Bray-Curtis similarity index. According to Spearman correlation index, relationship between the number of individuals and some physicochemical variables such as temperature, turbidity (light permeability), and depth of the lake was determined statistically significant.Öğe Chironomidae (Diptera) and Gammaridae (Amphipoda) Fauna in Dupnisa Cave (Sarpdere Village, Demirkoy, Kirklareli)(Ege Univ, 2009) Ozkan, NurcanTwo different field surveys were carried out in Dupnisa cave on the twentieth of August, 2001 and on the sixth of July, 2004. Specimens from Chironomidae (Diptera) and Gammaridae (Amphipoda) families were sampled from four different localities. The samples were then brought to laboratory and their identifications were done with microscopy. While no larvae from Chironomidae was found in the first locality, those of Paratrissocladius excerptus (Walker, 1806); Epoicocladius ephemerae (Kieffer, 1924) and Polypedilum (Tripodura) scalaenum (Schrank, 1803) were found in the second of Macropelopia nebulosa (Meigen, 1804); Telmatopelopia nemorum Goetghebuer, 1921; Paratrichocladius rufiventris (Meigen, 1830); Rheotanytarsus sp. and Micropsectra praecox Wiedemann, 1918 in the third and of Heleniella orniaticollis Edwards, 1929; Chaetocladius piger Goetghebuer, 1913; Psectrocladius barbimans Edwards, 1929; Polypedilum (Tripodura) scalaenum (Schrank, 1803) and Micropsectra praecox Wiedemann, 1918 were found in the fourth locality. On the other hand, Gammaridae was found to be represented in each of four localities with a single species, Gammarus arduus G. S. Karaman, 1973.Öğe COLONIZATION OF FRESH WATER LEECH ERPOBDELLA OCTOCULATA LINNAEUS, 1758 (ANNELIDA: HIRUDINIDA) IN DIFFERENT HABITATS IN TUNCA RIVER, EDIRNE(Parlar Scientific Publications (P S P), 2018) Ozkan, NurcanIn this study, it was aimed to investigate the colonization of Erpobdella octoculata Linnaeus, 1758 fauna in Tunca River (Edirne) at 3 stations and 5 different leaf packages. In this respect, 5 sampling were performed and some water parameters were recorded in June - October 2012. The distribution of Erpobdella octoculata belonging to Erpobdellidae family according to leaf package types, months and stations were given. In addition, this species was recorded for the first time in Tunca River of Trakya region.Öğe The Detection of Larval Chironomidae (Diptera) Fauna in Marmara Island and Their Distribution(Ege Univ, 2010) Ozkan, NurcanDuring the field study which has been carried out on 24-26.08.2010 to Marmara Island, samples of mud have been collected from 24 localities from running waters and lenthic habitats waters. After cleaning organisms in laboratory, chironomid larvae species have been identified under microscope. In the island 24 species belonging to 3 subfamilies have been found. Among these, 17 species belong to Chironominae subfamily, 1 species belongs to Orthocladiinae subfamily and 6 species belong to Tanypodinae subfamily. All of the species are new records for the Marmara Island; Einfeldia carbonaria (Meigen, 1804) species is new records for Marmara Region.Öğe Development of a macroinvertebrate-based multimetric index for biological assessment of streams in the Sakarya River Basin, Turkey(Springer, 2022) Odabasi, Deniz Anil; Odabasi, Serpil; Ergul, Halim Aytekin; Ozkan, Nurcan; Boyaci, Yunus Omer; Baykose, Ahmet; Kayal, MelihThe present study aimed to develop a multimetric index as a biological indication method of water quality using benthic macroinvertebrates for Turkey. A total of 207 operational taxa units were identified from 26 sampling sites through the employment of the multi-habitat method. Water was simultaneously sampled for both in-situ measurements and laboratory analysis in order to obtain the data on water chemistry. Ineligible metrics were excluded from the calculation process together with box-whisker plots and Kruskal-Wallis test (p < 0.05), considering the degree of overlap in the quartile limits (1 degrees-3 degrees). Among ten candidate metrics, four were considered suitable to form a multimetric index through Spearman correlation analysis. The core metrics were standardized with the 3(rd) quartile to obtain the index value. The index responded to a set of environmental variables, and split the ecological conditions into four categories as high, moderate, poor, and bad for the study area. Our results indicate that the multimetric index of the Sakarya River (MMIS) is an effective biological monitoring tool employing macroinvertebrates for biological monitoring in Turkey.Öğe Dikerogammarus istanbulensis sp. n., a new amphipod species (Amphipoda: Gammaridae) from Turkey with a key for the genus(Magnolia Press, 2011) Ozbek, Murat; Ozkan, NurcanA new amphipod species, Dikerogammarus istanbulensis sp. nov., is described. Specimens were collected from a reservoir, near Silivri district, Istanbul province, Turkey. The new species is similar to Dikerogammarus bispinosus Martynov, 1925 except for the presence of setae on inner surface of basal segment of pereopod 7 in both sexes and absence of long setae on the ventral side of second peduncle segment of antenna 1. In addition, epimeral plate 2 has many setae along the ventral margin in both sexes. A detailed morphological description and illustrations of the new species are given. Differences between the new species and related species are discussed. An identification key for the genus Dikerogammarus is presented.Öğe Ecological Analysis of Chironomid Larvae (Diptera, Chironomidae) in Ergene River Basin (Turkish Thrace)(Central Fisheries Research Inst, 2010) Ozkan, Nurcan; Moubayed-Breil, Joel; Camur-Elipek, BelginIn the present study, chironomid larvae were sampled periodically between the years 1995-96 during the one year at eight different localities of Ergene River Basin. A total of 60 chironomid taxa (325 individuals/m(2)) were recorded in the River and its tributaries (Ergene River Basin) during the sampling period. Also, it evaulated the larval chironomid assemblages in Meric-Ergene River Basin which is amongst the most important wetland area in European part of Turkey. Furthermore, it determined the physicochemical properties of the water to analyse the relationships between species composition of chironomid communities and environmental parameters. Structure of sediment at each sampling station of Ergene River Basin was revealed to determine the substratum preference of the larvae. It was that found sediment nutrient enrichment strongly influenced chironomid assemblage structure. Furthermore, main results due to species diversity, density of populations, similarities for the sampling stations and the substratum types were discussed. According to Shannon index, species diversity of the Basin was found as H'=1.41 at average. Also, Spearman index has indicated that significant correlations were found between chironomid larval densities and some environmental variables such as conductivity (r=-0.708), dissolved oxygen (r=+0.810), biological oxygen demand (r=+0.822), and chemical oxygen demand (r=+0.805) for P < 0.05.Öğe Fauna of Chironomid (Chironomidae; Diptera) in Turkish Thrace Region (Kirklareli, Tekirdag, Istanbul and Canakkale)(Ege Univ, 2006) Ozkan, NurcanIn this Study, Chironomidae (Diptera) larvae collected from 171 localities; rivers and stagnant waters in the Turkish Thrace from Kirklareli and Tekirdag provinces, Istanbul and Canakkale between July 2000 - August 2001 are evaluated taxonomically. 56 genus and 102 species from Tanypodinae, Orthocladiinae, Prodiamesinae and Chironominae subfamilies that belongs to Chironomidae family were determined. From these species, 28 of them are new records for Turkey's fauna of Turkish Thrace. Halocladius (Halocladius) millenarius (Santos Abreu), Endochironomus albipennis (Mg.), Glyptotendipes signatus Lenz., Microchironomus tener (K.) and Parachironomus vitiosus M. species are new records for Chironomidae fauna of Turkey.Öğe Freshwater and Brackish Amphipods (Crustacea: Amphipoda) from Turkish Thrace Region (Including Canakkale Province)(Inst Zoology, Bas, 2017) Ozbek, Murat; Ozkan, Nurcan; Camur-Elipek, BelginIn order to determine the fresh and brackish water amphipod species of the Turkish Thrace Region, specimens were sampled from 68 localities in Istanbul, Edirne, Tekirdag, Kirklareli and canakkale Provinces. Totally, 16 amphipod taxa were identified: Gammarus arduus G. Karaman, 1975, G. komareki Schaferna, 1922, G. pulex pulex (L., 1758), G. fossarum Koch, 1836, G. balcanicus Schaferna, 1922, G. aequicauda (Martynov, 1931), G. subtypicus Stock, 1966, G. uludagi Karaman, 1975, G. gonensis Ozbek, 2016, G. kesanensis Ozbek & camur-Elipek, 2010, Dikerogammarus istanbulensis Ozbek & Ozkan, 2011, Amathillina cristata Sars, 1894, Orchestia cavimana Heller, 1865, Synurella ambulans F. MOLLER, 1846, Pontogammarus robustoides Sars, 1894 and Niphargus sp. All the determined species were previously recorded-from Turkey. This is the first record of Gammarus gonensis in Europe. Information about the sampling localities and a distribution map of the species are presented.Öğe The influence of leaf litter on the distribution of aquatic oligochaetes in the Tunca River (Edirne, Turkey)(Springer, 2022) Yunlu, Melek Zeybek; Ozkan, Nurcan; Yildiz, SerayThis study was conducted in a portion of the Tunca River within Turkey's borders. Its aim is to investigate possible differences in Oligochaeta colonization in different leaf packages and to determine the impact of leaf litter on the distribution of aquatic oligochaetes. Simultaneously, the reasons for differences in Oligochaeta species colonization were investigated, and it was concluded that these differences were linked to the mesohabitat structure. Three stations were selected on the river for the study. Leaves from five different trees in the vicinity of these stations were gathered, packaged, and thrown into the water. When packing leaves, a 20 kg sack of potatoes was used, and a total of 25 packs were placed in localities. In addition, Oligochaeta samples were collected between May and October 2012 using a hand net. A total of 79 samples were obtained in areas of six different mesohabitats: Platanus orientalis leaf litter, Ulmus leavis leaf litter, Morus alba leaf litter, Juglans regia leaf litter, Buxus sp. leaf litter, and hand net samples. In the mesohabitats sampled, 751 specimens were identified, among them of 17 taxa and nine genera belonging to the family Naididae. Principal components analysis revealed the first two axes explained 89.3% of the total variance of the data. Limnodrilus hoffmeisteri was associated with the J. regia leaf litter, and Psammoryctides albicola was associated with the P. orientalis leaf litter. Most species determined demonstrated apparent affinity with the Buxus sp. leaf litter mesohabitats.Öğe INVESTIGATION OF COLONY FORMATION IN DIFFERENT LEAF PACKS OF CHIRONOMIDAE LARVAE IN EDIRNE TUNCA RIVER(Parlar Scientific Publications (P S P), 2018) Ozkan, NurcanThis research was carried out between May and October 2012 at three different stations in the vicinity of Tunca River in the province of Edirne. In the study, walnut, mulberry and elm leaf types gathered from the surrounding trees and artificial boxwood and leaf leaves made of dry plane leaf which was spilled in the previous year were prepared. These packages were aimed for determining which leaf packs, stations and months in which Chironomidae larvae preferred and colony in the following months, how the leaf packs might have preferred them, and species diversity at stations in the following months. The largest colonization was in artificial boxwood leaf packaging; the least colonization was found in the mulberry leaves. This suggested that leaf packets are used for accommodation rather than feeding. Also the number of larvae was found high in August. Fifty different species of Chironomid larvae were found in the river.Öğe THE INVESTIGATION OF LEAF PACKS ON THE DISTRIBUTION OF ODONATA AND ISOPODA FAUNA IN TUNCA RIVER, EDIRNE(Parlar Scientific Publications (P S P), 2022) Ozkan, NurcanThis study was carried out to compare the abundance rates, species, and the number of individuals in colony formation of Odonata and Isopoda benthic fauna in different leaf packs. The study was carried out in Tunca River (Edirne). Three stations were selected in the river and 5 different leaf species were used for sampling. Odonata and Isopoda samples were collected from leaf packs between June 2012 and October 2012. The collected samples were brought to the laboratory by placing them in 70% ethyl alcohol and examined under a stereomicroscope. Then, the ANOVA test was used for the analysis of Odonata and Isopoda fauna according to leaf packs, station, and months, and 0.05 a statistical significance was taken as basis in all tests. When the difference was found significant, the reason was revealed by the Tukey test. Variance analysis test results revealed that the number of individuals in both Odonata and Isopoda differed only by leaf type (artificial boxwood). There was no difference according to station and months. Shannon Weaver indices was applied to leaf varieties and stations. A total of 8 taxa were found, 7 from Odonata and 1 from Isopoda. Species Gomphus flavipes (Charpentier, 1825), Gomphus vulgatissimus (Linnaeus, 1758), Ischnura elegans (Vander Linden, 1820), Orthetrum albistylum (Selys, 1848) and Platycnemis pennipes (Pallas, 1771) (Odonata) are new records for the Tunca River. In addition, some water parameters have been studied.Öğe The Larval Chironomidae (Diptera) Fauna of Bozcaada (Tenedos)(Gazi Univ, 2006) Ozkan, NurcanIn this study, Chironomidae (Diptera) larvae, which were collected from 6 localities were evaluated taxonomically at the end of the field work in Bozcaada on 14-15/08/1999, 28/02/2001 and 24/05/2002. The two species (Macropelopia nebulosa (Mg.) and Telmatopelopia nemorum (G.)) belong to the two genus from the subfamily of Tanypodinae of Chironomidae, the four species (Cricotopus sylvestris (Fabr.), C. intersectus (Staeg.), Halocladius fucicola P (Edw.) and Paratrichocladius rufiventris (Mg.)) belong to the three genus from the subfamily of Orthocladiinae and the eight species belong to four genus from the subfamily of Chironominae (Chironomus salinarius K., C. thummi K., C. anthracinus (Zett.), C. viridicollis K., Einfeldia pagana (Mg.), Polypedilum aberrans Tsch., P. convictum (Walk.), Micropsectra praecox (Mg.). Totally fourteen species have been determined and recognition keys have been given. All these species are new records for Bozcaada. Also, the species of Chironomus salinarius K. is the new record for the fauna of Chironomidae in Turkey.Öğe The Larval Chironomidae (Diptera) Fauna of Gokceada (Imbroz)(Gazi Univ, 2006) Ozkan, NurcanBenthos specimens were collected by hand mud scoop from 21 localities in Gokceada during each field work, between 06-28.07.1991 and 06-10.08.1999. Specimens were collected from every kind of habitat as possible (e.g. lakes, ponds, dams, streams and troughs). As a result of this study 53 species of 34 genuses were determined from subfamilies Tanypodinae, Orthocladiinae and Chironominae (Chironomini and Tanytarsini) of Chironomidae family. 35 of the 53 species that were determined are new records for the larval Chironomidae fauna of Gokceada. 25, the species number described in previous studies in Gokceada, has increased to 60 with this study.Öğe Mapping the tobacco retailers in Edirne, Turkey [Meeting Abstract(European Respiratory Soc Journals Ltd, 2012) Karlikaya, Celal; Ince, Huseyin; Ozkan, Nurcan[Abstract Not Available]Öğe A new larval record of Demicryptochironomus Lenz, 1941 (Diptera, Chironomidae) for the Turkish fauna(Tubitak Scientific & Technological Research Council Turkey, 2017) Ozkan, Nurcan; Akiska, SeyhanDemicryptochironomus (Demicryptochironomus) vulneratus (Zetterstedt, 1838) was collected as a total of 4 individuals from the Garzan Brook, Batman Brook (Beseri), and Tigris River (Hasankeyf) and recorded as a new chironomid larva species for the Turkish potamofauna. The species was identified morphologically under light microscope and photographed with a photomicroscope. In addition, the taxonomic features of the species were illustrated schematically with a scale.
