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Öğe A Contribution on the Diet of the Warty Crab, Eriphia verrucosa (Forskal, 1775) by Informative Bayesian Stable Isotope Mixing Models(Maik Nauka/Interperiodica/Springer, 2022) Acar, Seçil; Ertürk Gürkan, Selin; Ateş, A. Suat; Yalçın Özdilek, ŞükranThe present study aims to determine the diet composition of Eriphia verrucosa using an informative and uninformative approach in which the stomach content results were assigned as prior based on this model. A stable isotope mixing model and stomach content analysis were used together to determine the diet and prey-predator relationships of E. verrucosa. A total of 24 crabs and benthic material were collected from depths between 1.5 and 2 m in the Strait of canakkale in July, 2020. The contribution of two different diets was assessed both by prior assignment (informative) and uninformative. According to the stomach content analyses, among the prey, Echinodermata contributed 37% to the diet, followed by Mollusca, especially Gastropoda (18%). In the uninformative model without prior assignment and in the informative model (prior assignment), Gastropoda contributed the most to the diet (57, 66%, respectively).Öğe Assessment of physical carrying capacity of a mariculture zone designated in the Aegean Sea(Springer, 2024) Yiğit, Murat; Ergün, Sebahattin; Büyükateş, Yeşim; Ateş, Abdullah Suat; Özdilek, H. Göksel; Acar, SeçilThe present study was conducted to evaluate the physical carrying capacity in a mariculture zone designated for cage aquaculture in the Aegean Sea (Mersin Bay, Izmir, Turkiye). Rapid assessment of carrying capacity for the approval of new investments or capacity increase requests environment-regulated timely management procedures for the sustainable development of the drastically growing cage aquaculture industry in the Mediterranean. Hence, the mathematical estimations earlier developed for the Mediterranean area have been applied for the carrying capacity assessment using the data gathered from eight fish farms operating in the area. The data collected from the farms comprised the information such as current granted production level, surface area, location depth, current speed, shore distance, and coordinates of the farm sites. The results obtained showed an estimated carrying capacity for the investigated mariculture zone as 252,852 tons which is about 18 times the current production level of 13,500 tons that was granted in total for the sum of eight cage farms in the region with a total of 50.89-ha surface area. It can be concluded that, with the condition of periodic environmental monitoring to keep the marine ecosystem below eutrophication risk, the production capacity of farms in the designated mariculture zone, comprising a surface area of 50.89 ha, could be increased by 18-fold over the present production level, which is far below the risk threshold. The findings of this study provide important support for decision-makers in the management of intensive cage aquaculture operations in the Mediterranean region.Öğe Çardak Lagünü (Çanakkale)'nde bulunan yeşil yengeç, Carcinus aestuarii Nardo, 1847'nin populasyon yapısı ve bazı biyo-ekolojik özellikleri(Çanakkale Onsekiz Mart Üniversitesi, Lisansüstü Eğitim Enstitüsü, 2018) Acar, Seçil; Ateş, SuatÇardak Lagünü'nde (Çanakkale Boğazı) yapılan mevcut çalışmanın amacı lagün alanında dağılım gösteren portunid yengeç, Carcinus aestuarii'nin populasyon yapısı ve biyo-ekolojik özelliklerini belirlemektir. Çalışmada yengeç bireyleri Nisan 2015-Mart 2016 arasında pinter avcılığıyla 6 farklı istasyondan örneklenmiştir. Toplamda 2458 birey (686 dişi, 1755 erkek ve 17 juvenil) toplanmıştır. Ortalama karapas boyu dişilerde 38,85±0,17 mm, erkeklerde 47,65±0,16 mm olarak ölçülmüştür. En fazla bireye Kasım ayı'nda (239 birey) ve en az bireye (125 birey) ise Şubat ayı'nda rastlanmıştır. Yakalanan bireylerde üreme dönemi Kasım-Şubat arasında olup, yumurtalı dişiler Kasım, Şubat ve Mart ayları'nda bulunmuştur. Dişilerde ortalama yumurta sayısı 61390±8,48 ve yumurta çapı 345µm olarak hesaplanmıştır. Dişi: erkek oranı ise 0,39:1'dir. C. aestuarii bireylerine ait toplam 533 mide incelenmiş ve 240 mide (%45) en az bir besin maddesi içerirken, 293 mide (%55) boş olarak bulunmuştur. Mide içeriklerinde en fazla yer alan besin grupları balık omuru, balık pulu, fotofil alg, yengeç (keliped, ekstremite ve yumurta), midye parçaları ve detritus'tur.Öğe Çardak Lagünü’nde pinter ile avlanan yeşil yengeç, Carcinus aestuarii’nin Nardo, 1847 birim çabadaki av miktarı(2020) Acar, Seçil; Ateş, A. SuatÇardak Lagünü’nde (Çanakkale Boğazı) yapılan bu çalışmanın amacı pinterle avlanan Yeşil Yengeç, Carcinus aestuarii ’in aylık birim çabadaki av miktarını (BÇAM) belirlemektir. Bu çalışmadayengeç örnekleri Nisan 2015-Mart 2016 arasında pinter aracılığı ile aylık olarak 6 farklı istasyondan toplanmıştır. Çalışma sonucunda toplam 686 dişi, 1755 erkek ve 17 immature birey toplamda2458 yengeç bireyi örneklenmiştir. En yüksek av verimi Ekim ayında (12.74 birey/gün), en düşükav verimi ise Şubat ayında (2.43 birey/gün) elde edilmiştir. En yüksek BÇAM değeri (10.02 birey/gün) 1. Istasyon için, en düşük (7.02 birey/gün) 6. istasyon için hesaplanmıştır.Öğe Çardak Lagün’ü Balıkçılığının Genel Durumunun Değerlendirilmesi(Mersin University Mersin Üniversitesi, 2025) İşcan, Samet; Daban, İsmail Burak; Şen, Yusuf; Öztekin, Alkan; Arslan İhsanoğlu, Mukadder; Acar, Seçil; İşmen, AliÇardak lagünü ve çevresindeki balıkçılık faaliyetlerinin genel durumunun değerlendirmesi ve lagünün ticari av kompozisyonu hakkında bilgi sahibi olmak için, lagün içi ve yakın çevresinde balıkçılık faaliyetleri ger-çekleştiren balıkçılar ile Mayıs 2024 ile Mayıs 2025 tarihleri arasında anket yöntemiyle araştırma gerçekleşti-rilmiştir. Ruhsatlı ve ruhsatsız 23 tekne sahibi ve 2 amatör balıkçı ile yüz yüze gerçekleştirilen görüşmeler so-nucunda oluşturulan anketlerde, balıkçıların sosyoekonomik yapısı ve av gücü ile lagünün ticari av kompo-zisyonu ve yönetimsel sorunlar değerlendirilmiştir. Balıkçıların sosyo-ekonomik açıdan %80’nin evli olduğu, yaşlarının ortalamasının 53,7 ± 2,3 (32 ile 81 yaş arası) olduğu, %52’sinin ortaokul mezunu olduğu, %72’sinin sosyal güvencesinin bulunduğu, tekne sahiplerinden %65’inin ek gelir için farklı işlerde çalıştığı, %70’inin 20 yıldan fazla balıkçılık tecrübesine sahip olduğu ve %74’ünün 2 çocuk sahibi olduğu belirlenmiş-tir.Av gücü değerlendirildiğinde, balıkçıların sahip oldukları teknelerin %74’ünün 6,9 m ve daha küçük boyda, %61’inin 15 hp motor gücünden düşük güçte ve %60,8’inin 20 yaşından büyük olduğu tespit edilmiş-tir. Balıkçıların %73,9’unun tayfa çalıştırmadığı, %52,2’sinin sadece uzatma ağları ile avlandığı, %47,8’inin 12 ay balıkçılık yaptığı ve %65’inin lagün dışında avlandığı belirlenmiştir. Ticari av kompozisyonu değerlen-dirildiğinde 13 farklı kemikli ve 3 farklı kıkırdaklı balık türünün lagün içerisinde bulunduğu ve yıllık ortalama kişi başı av miktarının 250 kg’dan az olduğu, en fazla yakalanan türlerin kefal türleri (Mugilidae spp.), levrek (Dicentrarchus labrax) ve lüfer (Pomatomus saltatrix) olduğu belirlenmiştir. Son 10 yılda lagün içerisindeki bolluğu azalan ve/veya tamamen yok olan türlerin durumu sorulduğunda, balıkçılar kefal türleri, kalkan (Scophthalmus maximus), uskumru (Scomber scombrus), levrek ve lüfer gibi türlerin bolluğunda ciddi azal-malar olduğunu ifade etmişlerdir. Yönetimsel sorunlar değerlendirildiğinde, lagün içi av baskısının azaltılması açısından dönem içi belirli bir aralıkta kapalı sezon uygulanmasının faydalı olacağı, balıkçılar tarafından bil-dirilmiştir. Lagünde sığlaşmanın ve bataklık alanların en büyük sorunlarından olduğu ve lagün içerisinde ya-sadışı balıkçılık faaliyetlerinin de görüldüğü bildirilmiştir. Sonuç olarak, balıkçıların beyanlarına göre aşırı av-cılık, kirlilik, sığlaşma gibi olumsuz etkenlerin Çardak Lagünü balıkçılığını olumsuz etkilediği anlaşılmaktadır. Mevcut sorunların daha iyi anlaşılabilmesi için bilimsel örneklemelere dayalı tespitlerin gerçekleştirilmesi, çö-züm önerilerinin geliştirilmesi için ise balıkçıların da paydaş olarak katılacağı kurumlar arası işbirliklerinin hayata geçirilmesi önerilmektedir.Öğe Composition of Bivalve Community in the Coastal Waters (0–4 m) of the Çanakkale Strait Along With Various Environmental Variables(2024) Yazıcı, Hazal; Ateş, Abdullah Suat; Acar, SeçilThe present study focused on the soft bottom of the coastal waters (0-4 m) in the Çanakkale Strait. The objective was to determine the composition of bivalve species in the area. Sediment samples were collected using a 30×30 cm quadrat system by a SCUBA diver at eight sites between July 2008 and April 2009. The study recorded a total of 2299 individuals belonging to 55 species. The most abundant species in the study area was Lucinoma borealis. A significant positive correlation was found between seawater salinity and species diversity (rs = 0.59; p<0.05). The highest similarity in species diversity between seasons occurred between autumn and summer.Öğe Epibionts of mediterranean green crab, Carcinus aestuarii Nardo, 1847 in Canakkale Strait: Based on seasonal, sexual and color variation(Springer, 2024) Acar, SeçilCarcinus aestuarii is representative of lagoons and is currently defined as a cosmopolitan species across different geographical regions. The objective of this study was to ascertain the species composition, prevalence, density, sex, and seasonal distribution of epibionts hosted by C. aestuarii in the Canakkale Strait. Samples of C. aestuarii were collected seasonally in Cardak Lagoon (Canakkale Strait) summer, autumn, winter, and spring using a static traditional eel trap. It was observed that the crabs were extensively colonized with bivalves, barnacles, polychaetes, and amphipods, and carried epibionts in the carapace and abdominal region. Additionally, it was observed that males exhibited a greater prevalence of epibionts than females, and that the epibiont load on the crab increased during the winter season. This study reports the first recorded instance of Anomia sp. and Sacculina carcini on C. aestuarii. The study on the invasion of the green crab is of significant importance to gain insight into the behavior, dispersal patterns, and impacts of the species. The knowledge presented here may then be utilized in the development of strategies for the management and control of invasive species, thereby contributing to the conservation of ecosystems and the maintenance of biodiversity.Öğe Evaluation of isotopic signature of mucilage in the benthic food web in the Çanakkale Strait(Universitatea din Oradea, 2022) Gürkan, Selin Ertürk; Acar, Seçil; Gürkan, Mert; Özdilek, Şükran YalçinThe mucilage formation, which emerged in the Marmara Sea in November 2020, was soon seen in the Çanakkale Strait and became effective in different locations of the strait in a short time. In this study, the place of mucilage in the food web as a food source and the percentage of mucilage in the food web of warty crab (Eriphia verrucosa), which is a benthic species, was determined by the stable isotope method. For this purpose, E. verrucosa was sampled from a mucilage-affected area of the Çanakkale Strait in July 2021. In addition, sediment samples were collected to sort out macrophyte samples and macroinvertebrate samples, which could be possible food sources of the species. Finally, the pelagic and benthic mucilage samples were also taken and brought to the laboratory in the cold chain. The stable isotope analyses of all samples were made and evaluated. The results showed that mucilage from both layers joined the food web and that benthic mucilage, in particular, contributed to the diet of a benthic species, E. verrucosa. The possible contribution of mucilage, which has been determined to be included in the diet of benthic organisms with its high bacterial density, is also a concern for the diet of fish species that are consumed more frequently by humans. © 2022 Universitatea din Oradea. All rights reserved.Öğe Evaluation of the health of Mediterranean mussels ( Mytilus galloprovincialis Lamarck, 1819) distributed in the Çanakkale strait, Turkey(Elsevier Sci Ltd, 2024) Gürkan, Mert; Ertürk Gürkan, Selin; Künili, İbrahim Ender; Acar, Seçil; Özel, Osman Tolga; Düzgüneş, Zehra Duygu; Türe, MustafaThe observation of mortality in Mediterranean mussels ( Mytilus galloprovincialis ) distributed in the Çanakkale Strait in recent years was influential in developing the research question for this study. In this study, the presence of bacteria ( Vibrio spp.) and parasites ( Marteilia spp. and Haplosporidium spp.) in mussels collected from Kumkale, Kepez, and Umurbey stations in the Çanakkale Strait was investigated seasonally. Microbiological findings, histopathology, oxidative stress enzymes and their gene expressions, lipid peroxidation, lysosomal membrane stability, and changes in haemolymph were examined. In summer samples, both the defence system and the extent of damage were higher in gill tissue. In winter samples, enzyme activities and lipid peroxidation were found to be predominantly higher in digestive gland tissues. Histological examinations and Hemacolor staining revealed the presence of protozoan cysts, and for bacterial examination, molecular analysis performed after culturing revealed the presence of 7 Vibrio species. While the total numbers of heterotrophic bacteria detected in all samples were at acceptable levels, the predominance of Vibrio spp. numbers among the total heterotrophic bacteria detected in almost all samples were noteworthy. The total hemocyte count was calculated as 5.810(4) +/- 0.58 (cells/mm 3 ) in winter and 7.210(4) +/- 1.03 (cells/mm 3 ) in summer. These factors are considered to be possible causes of mussel mortality.Öğe Exotic Polychaetes of a Sewage Pollution Influenced Lagoon (cardak Lagoon, Turkish Straits)(MDPI, 2023) Dağlı, Ertan; Ateş, Abdullah Suat; Acar, Seçil; Büyükateş, Yeşim; Dogan, Alper; Bakır, Ahmet KeremThis paper includes three exotic polychaeta species, Hydroides dianthus (Verrill, 1873), Polydora cornuta Bosc, 1802, and Pseudopolydora paucibranchiata (Okuda, 1937), found during benthic samplings in Çardak Lagoon (Turkish Straits). The sampling was collected from the sandy and silty bottoms known to be polluted by sewage discharges. A total of 45 specimens of exotic polychaetes (H. dianthus: 1; P. cornuta: 4; P. paucibranchiata: 40) were found. The correlation values between the annual average values of the nutrients and the polychaeta abundance showed that the highest positive relationships with the abundance were between sand content, total phosphate, and pH. P. cornuta was the most observed species with a frequency index value of 75%, while H. dianthus was represented with a single species in the study area. Albeit the previous studies, P. paucibranchiata was observed most abundantly in the sampling station having low organic matter amounts. The study showed that opportunistic polychaetes observed in Çardak Lagoon mostly preferred organically poor sediments.Öğe Feeding ecology of portunid crab, Carcinus aestuarii Nardo, 1847 in Cardak Lagoon (The Turkish Straits System)(Ege University Faculty of Fisheries, 2021) Acar, Seçil; Ateş, A. SuatThe aim of the present study was to determine the feeding ecology of portunid crab, Carcinus aestuarii in Çardak Lagoon. For this purpose, a total of 533 crab stomachs were analyzed. Stomach contents were examined under a binocular stereomicroscope and 240 (45%) of the stomach samples were recorded as full (containing at least one food item) and 293 (55%) were recorded as empty. The occupancy rates were 25% in 127 stomachs, 50% in 69, and 100% of 44. The main diet of crab individuals was composed of fragments of fish species. Diatoms were the least consumed food by crabs. A total of 8494 diet fragments were found in the stomachs. Total stomach content was 26.39 g of fish vertebrates having the highest weight (3.58 g).Öğe First observation of the zebra mussel (Dreissena polymorpha (Pallas, 1771)) on the narrow-clawed crayfish inhabiting in some water sources of Turkey(Ege Üniversitesi, 2018) Berber, Selçuk; Ateş, Abdullah Suat; Acar, SeçilThe zebra mussel, Dreissena polymorpha (Pallas, 1771) is considered as a harmful invasive epibiont species for hydroelectric and nuclear power plants as it reduces or blocks water flow in the plant systems. Although D. polymorpha is reported that it cleans the water, increases water visibility, and filters out pollutants, it has likewise negative impacts on the population and size of some fish and aquatic species. In the present study, zebra mussels were observed for the first time. On the narrow-clawed crayfish living in some water sources in Turkey. Specimens were collected from two natural lakes (Cildir Lake, Egirdir Lake) and five ponds (Altinyazi Dam Lake, Keban Dam Lake, Kucukcekmece Lake, Karpuzlu Dam Lake, Kadikoy Dam Lake) in Turkey. Attachments of the zebra mussel to the different body parts of the narrow-clawed crayfish were documented in the present study. Cochran's Q test results showed that the numbers of mussels clinging to the different parts of the crayfish varied (P=0.000) (P < 0.001). The difference between the holding regions of zebra mussels on crayfish specimens may cause some adverse effects on the host. Particularly the intensive grip on the carapace partially obstruct the movement, feeding, mating, avoiding predators, and shelter. mussel individuals in the pleopodal region may have difficulty holding and transporting eggs. This study is the first report about the occurrence of D. polymorpha on Astacus leptodactylus in Turkish waters.Öğe First Record of the Epizoic Octolasmis angulata (Cirripedia) on Maja squinado (Herbst, 1788) (Majoidea, Crustacea) from Çanakkale, Türkiye(Çanakkale Onsekiz Mart Üniversitesi, 2022) Acar, Seçil; Şen, YusufSome morphometric and biological characteristics of a European spider crab, Maja squinado (Herbst, 1788) caught off Aksaz region, (Biga, Çanakkale, Türkiye) were investigated. In addition, an epizoic species infesting this M. squinado specimen has been identified. The crab specimen was caught by a commercial fisherman using trammel nets. Carapace length, carapace width and weight of the crab were 15.9 cm, 14.5 cm, and 1109 g respectively. The specimen was an ovigerous female with a calculated fecundity of 3.48x104 eggs. Eggs were in stage 4th of development and covered the whole carapace region. Additionaly, it was observed that the specimen was infested with the epixoic barnacle Octolasmis angulata (Aurivillius, 1894). A total of 46 O. angulata individuals were observed; 32 from the gill lamellae, and 14 from the carapace. This study reports the existence of the epizoic O. angulata on Maja squinado for the first time in Türkiye.Öğe New species of freshwater molluscs from Gokceada (northeastern Aegean Sea), Turkey (Gastropoda: Hydrobiidae, Bythinellidae)(E Schweizerbartsche Verlagsbuchhandlung, 2019) Odabaşı, Serpil; Odabaşı, Deniz Anıl; Acar, SeçilFor centuries, scientists have been inspired by island ecosystems in terms of their biodiversity and physical environment. Because freshwater and terrestrial ecosystems of the Aegean Islands have undergone processes of formation and geographical isolation differentiating them from the adjacent mainland, they have attracted many scientists. Although several papers describing the freshwater molluscs of these islands have been published, there is no such study about the Turkish islands of Gokceada and Bozcaada located in the northern Aegean Sea. This study describes the diversity of the freshwater mollusc fauna of Gokceada. Sampling of freshwater snails by kick-net and hand-collection was carried out throughout the island, covering diverse habitats including fountains, streams, and artificial ponds. The findings include the first records of Dreissena polymorpha and Pisidium subtruncatum from Gokceada and the invasive gastropod Physella acuta. Furthermore, we present descriptions of the anatomy and shells of four new species of freshwater snails: Pseudamnicola cirikorum sp. n., Pseudamnicola radeae sp. n., Grossuana kayrae sp. n., and Bythinella gokceadaensis sp. n. We compare these new species (except G. kayrae sp. n.) with previously described congeners from the Sporades, mainland Greece, and western Turkey. Because Grossuana had previously not been recorded from Turkey, G. kayrae is compared with Greek and Balkan (southwestern Thrace) Grossuana species.Öğe Occurrence of the Scavenger Crustaceans Natatolana neglecta (Hansen, 1890) (Isopoda: Cirolanidae) and Scopelocheirus hopei (Costa in Hope, 1851) (Amphipoda: Scopelocheiridae) on Bento-pelagic Fish Species in the Turkish Straits System(Inst Zoology, Bas, 2022) Mülayim, Ayşegül; Ateş, Abdullah Suat; Şen, Yusuf; Özekinci, Uğur; Acar, SeçilThe scavenger crustaceans Natatolana neglecta (Hansen, 1890) (Isopoda: Cirolanidae) and Scopelocheirus hopei (Costa in Hope, 1851) (Amphipoda: Scopelocheiridae), along with several other peracarid crustaceans, were recorded on demersal fish species in the Turkish Straits System. Samples were collected on (in) Raja clavata, Chelidonichthys lucerna, Trachurus sp., Scorpaena scrofa, Merluccius sp., Solea solea and Squalus acanthias captured by trammel nets at depth of 50 m on 26(th) January 2021. Natatolana neglecta, Scopelocheirus hopei and Nebalia abyssicola Ledoyer, 1997 are new for the fauna of the Turkish Straits System.Öğe Population structure, growth and reproduction characteristics of the portunid crab, Carcinus aestuarii Nardo, 1847 (Decapoda, Carcinidae) in Çardak Lagoon, Turkish Straits System(Brill, 2020) Acar, Seçil; Ateş, Abdullah SuatThe aim of the present study was to determine the population structure and bioecological characteristics of the portunid crab, Carcinus aestuarii in Cardak Lagoon. In this study, the crabs were sampled by means of fyke-nets at 6 different stations between April 2015 and March 2016. A total of 2458 individuals (686 females, 1755 males, and 17 juveniles) were captured. The average carapace length was measured as 38.85 +/- 0.17 mm in females, and 47.65 +/- 0.16 mm in males. The highest number of specimens was observed in November with 239 individuals, while the lowest number (125 specimens) was observed in February. The reproductive period in both sexes was between November and February and females with eggs were found in November, February and March. An average number of eggs in a female was 61 390 +/- 8.48 and the egg diameter was 345 mu m. The female : male ratio was 0.39 : 1. This paper includes the first published data on population structure, growth, and reproduction characteristics of C. aestuarii in a protected lagoon in the Turkish Straits System.Öğe Presence of microplastics in the stomachs of Carcinus aestuarii Nardo, 1857 in Çardak Lagoon, Çanakkale Strait, Turkey(Cahiers De Biologie Marine, 2018) Acar, Seçil; Ateş, Abdullah SuatThis paper reports the presence of microplastic in the stomachs of the Mediterranean green crab, Carcinus aestuarii Nardo, 1857. The crabs were collected from six sites chosen in the Cardak Lagoon (Canakkale Strait). Plastic fibers were observed in the stomach contents of three male individuals. Since C. aestuarii is an important food for fish and birds in estuarine and lagoon areas, microplastics can go up to the trophic levels by entering the food chain.Öğe Presence of the Mesopodopsis slabberi (Van Beneden, 1861) (Crustacea: Mysida) from the Mediterranean Sea coast of Turkey(Ege Üniversitesi, 2019) Özcan, Tahir; Ateş, Abdullah Suat; Acar, SeçilMysid, Mesopodopsis slabberi (Van Beneden, 1861) was for the first time recorded in Iskenderun Bay (eastern Mediterranean). A total of 10 specimens belong to M. slabberi was collected at the depths between 0 and 2 m. This paper is on the first record of M. slabberi from the Levantine coast of Turkey.Öğe Relationships between environmental variables and abundance of Cnidaria and Echinodermata in Çardak Lagoon, Çanakkale Strait(Ege Üniversitesi, 2023) Acar, Seçil; Ateş, Abdullah Suat; Dağlı, Ertan; Doğan, AlperThis study is on the relationships between the abundances, of cnidarians and echinoderms found in Cardak Lagoon and environmental variables. The benthos samples were collected in three replicates in October 2018, February, April, and June 2019, using a metal framed quadrat system of 100 x 100 cm and 393 cm(3) sediment core by a SCUBA diver. Sediment material was collected at 7 sampling points of Cardak Lagoon in Canakkale Strait. A total of 259 individuals belonging to phylum, Cnidaria and Echinodermata were found in the study area. Cnidarian, Actinia sp. and echinoderm, Asterina gibbosa were the most dominant species. The highest positive correlation value was between Cnidaria species number and organic matter (OM%) content in the sediment. The highest negative correlation value was between Echinodermata species number and NO2+NO3 in lagoon system.Öğe Restricted effects of climate change on annual streamflow of Sarıçay stream (Çanakkale, Turkey)(2016) Kale, Semih; Ejder, Tuba; Acar, Seçil; Hisar, Olcay; Mutlu, FatihThe global warming and the associated climate change lead to significant problems related to sustainability of natural resources. The observations and research on this issue have shown that most of the water resources have been affected by this phenomenon. These effects of global warming on water resources can be listed as decreased amount of water and droughts in mid-latitude belt. In the current study the changes in the flows of Sarıçay stream in Çanakkale and the time series of the climate parameters related to the region were determined and trends of these variations were estimated. A 34-years data set regarding the river flows between 1978 and 2011 as well as some annual climate parameters such as temperature, evaporation and precipitation have been collected by three meteorological observation stations (Bozcaada, Gökçeada, Çanakkale) for 43 years were used. Pettitt change-point analysis was used to determine the change points for streamflow and climatic parameters. Box-Jenkins method and the ARIMA model were used for trend analyses. Results showed that there was a decrease in precipitation and streamflow on the contrary an increase in evaporation and temperature. However, these changes were statistically insignificant (P > 0.05). In conclusion, climate change effects on river streamflow could be unstable and many factors such as latitudinal location, anthropogenic effects, agricultural activities, population density and residential areas could affect the streamflow.
