Epilithic diatom-based ecological assessment in Taşmanlı pond (Sinop, Turkey)

The common goal of the Water Framework Directive (WFD) published by The European Parliament and European Council and the Regulation on the Management of Surface Water Quality Directive (RMSWQ) published by the Republic of Turkey, Ministry of Forestry and Water Affairs, is to provide all water bodies to achieve a fine ecological status. These directives require the use of relevant biological quality elements and diatoms constitute an important group within these elements. The use of diatom based indices for assessing ecological conditions in inland water systems is increasing day by day. The current study was performed with the aim of determination of the ecological status of the Taşmanlı Pond based on epilithic diatoms, physico-chemical parameters and to estimate pond water quality using diatom indices. For this purpose, epilithic diatom and water samples were collected from 3 stations in the pond in monthly intervals from March 2008 to March 2009. The identifications of the sampled revealed presence of a total of 46 taxa in the sampled stations. Achnanthidium minutissimum (Kützing) Czarnecki, Nitzschia acicularis (Kützing) W. Smith, Navicula cincta (Ehrenberg) Ralfs in Pritchard and Navicula cryptocephala Kützing were the dominant taxa in all stations. According to Regulation on the Management of Surface Water Quality directive, the pond water was classified as III-IV quality class and trophic status changed from mesotrophic to eutrophic. Significant correlation was determined between LTDI (Lake Trophic Diatom Index) and EQR (Ecological Quality Ratio). The values of LTDI and EQR indicate that, pond water has class III (poor, moderately polluted site) water quality.Avrupa Parlementosu ve Avrupa Birliği tarafından yayınlanan Su Çerçeve Direktifi (WFD) ve Türkiye’de “Orman ve Su İşleri Bakanlığı, Su Yönetimi Genel Müdürlüğü” tarafından yayınlanan “Yüzey Suları Su Kalite Yönetmeliği”nin ortak hedefi, tüm su kütlelerinin iyi bir ekolojik statüye ulaşmasıdır. Bu yönetmelikler, amaca uygun biyolojik kalite öğelerini kullanmayı gerektirmektedir ve diyatomeler bu öğeler içerisinde oldukça önemli bir grubu oluşturmaktadır. Diyatome temelli indislerin içsu kütlelerinde ekolojik parametrelerin belirlenmesi amacı ile kullanımı günden güne artış göstermektedir. Bu çalışmada, Taşmanlı Göleti’nin ekolojik durumunun değerlendirilmesinde epilitik diyatomelerin, fizikokimyasal parametrelerin ve diyatome indislerinin ekolojik kalitenin belirlenmesinde, bir araç olarak test edilmesi amaçlanmıştır. Bu nedenle, Mart 2008 - Mart 2009 tarihleri arasında göletten alınan diyatome ve su örnekleri analizleri sonucunda, toplam 46 takson gözlenmiştir. Bunlardan Achnanthidium minutissimum (Kützing) Czarnecki, Nitzschia acicularis (Kützing) W.Smith., Navicula cincta (Ehrenberg.) Ralfs in Pritchard, Navicula cryptocephala Kützing tüm istasyonlardaki baskın türlerdir. Yapılan fizikokimyasal testler sonucu gölet suyu “Yüzeysel Su Kalitesi Yönetmeliği” ne göre III-IV kalite sınıfı olarak sınıflandırılmış ve trofik durumu mezotrofiden ötrofiye doğru değişmiştir. LTDI (Göl Trofik Diatom İndeksi) ve EQR (Ekolojik Kalite Oranı) değerleri gölet suyunun sınıf III (tamamen kirli alan) su kalitesine sahip olduğunu göstermektedir

Yedikır Baraj Gölü fitoplanktonu’nun kompozisyonu, fonksiyonel sınıflandırılması ve trofik yapısı

Bu çalışma, 25-28 Ağustos 2014 tarihleri ​​arasında Bursa Türkiye'de düzenlenen “6. Ulusal Limnoloji Sempozyumu” nda sunulmuştur.Functional classification, Trophic Status and composition of phytoplankton in Yedikır Dam Lake were studied between October 2004 and April 2006. Although Chlorophyta and Bacillariophyta were dominant in respect to species numbers, Cyanophyta and Chlorophyta type phytoplankton were registered in terms of population density in Yedikır Dam Lake. According to an average chlorophyll a concentration of 16 μg L-1 , Dam Lake belongs to the eutrophic level of the trophic scale. A total of 126 phytoplankton species were identified in the study period, belonging to 18 functional groups. The seasonal succession of dominant functional groups followed this sequence of coda: B (Cyclotella), F (Kirchneriella), J (Crucigenia), H1 (Anabaena, Aphanizomenon), LO (Merismopedia), and W2 (Trachelomonas). Trophic state indices derived from chlorophyll a and transparency, were close together, but both were above the phosphorous index. Values of trophic state indices rank the Yedikır Dam Lake as being eutrophic. According to the some functional groups and indices the phytoplankton biomass in Dam Lake is probably limited by low phosphorus, low light and low nutrients.Yedikır Baraj Gölü fitoplanktonu’nun kompozisyonu, fonksiyonel sınıflandırılması ve trofik yapısı Kasım 2004–Nisan 2006 tarihleri arasında incelenmiştir. Baraj gölünde tür sayısı bakımından Chlorophyta ve Bacillariophyta üyeleri yoğun iken, tür yoğunluğu bakımından Cyanophyta ve Chlorophyta tipi fitoplanktona rastlanmıştır. 16 μg L-1 olan ortalama klorofil konsantrasyonuna göre baraj gölünün trofik derecesi ötrofik düzeyi göstermektedir. Çalışma alanımızda 18 farklı fonksiyonel gruba ait toplam 126 fitoplankton türü tespit edilmiştir. Mevsimsel artışa bağlı dominant fonksiyonel grupların kodon sıralanışı şu şekildedir: B (Cyclotella), F (Kirchneriella), J (Crucigenia), H1 (Anabaena, Aphanizomenon), LO (Merismopedia), and W2 (Trachelomonas). Klorofil a ve seki diski derinliği bağlı gölün trofik yapı indis değerleri birbirine yakın olup toplam fosfat indis değerinden yüksek olmuştur. Trofik yapı indis değerlerine göre Yedikır Baraj Gölü ötrofik kategoridedir. Gerek bazı fonksiyonel gruplar gerekse indis değerlerine göre göl suyundaki ışığın, besinlerin ve fosfatın azlığı baraj gölündeki fitoplankton yapısını sınırlamaktadır

Morphological and 18S rRNA analysis of coccoid green algae isolated from lakes of Kizilirmak Delta

WOS: 000304071800002Molecular techniques are used today in many areas and have increased the confidence level of studies. The aim of the study was to compare the classical morphological characters of coccoid green algae under field and culture conditions by using modern molecular analysis. To achieve this aim, we first isolated the coccoid green algae from Liman and Cernek lakes. The morphological variations of green algae were observed under culture conditions and the phylogenetic relationships of these strains were defined according to the 18S rRNA gene sequences. According to sequence analysis, 2 of the isolated species had high similarity to Scenedesmus subspicatus (98%) and Desmodesmus sp. (100%).Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [2214]; Leibniz Institute of Freshwater Ecology and Inland Fisheries, Stechlin, GermanyWe are grateful to Lothar Krienitz for his kind help and useful guidance throughout the course of this study in Germany. This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under the International Research Fellowship Program (2214). Additional support was provided by the Leibniz Institute of Freshwater Ecology and Inland Fisheries, Stechlin, Germany

Kızılırmak Deltası’ndaki göllerden izole edilen küresel yeşil alglerin morfolojik ve 18S rRNA analizi

Molecular techniques are used today in many areas and have increased the confi dence level of studies. Th e aim of the study was to compare the classical morphological characters of coccoid green algae under fi eld and culture conditions by using modern molecular analysis. To achieve this aim, we fi rst isolated the coccoid green algae from Liman and Cernek lakes. Th e morphological variations of green algae were observed under culture conditions and the phylogenetic relationships of these strains were defi ned according to the 18S rRNA gene sequences. According to sequence analysis, 2 of the isolated species had high similarity to Scenedesmus subspicatus (98%) and Desmodesmus sp. (100%).Günümüzde moleküler teknikler pek çok alanda kullanılmakta ve yapılan çalışmaların güvenilirliğini artırmaktadır. Araştırmanın genel amacı, küresel yeşil alglerin klasik morfolojik karakterlerini arazi ve kültür şartları altında modern moleküler analizleri kullanarak karşılaştırmaktır. Bu amacı gerçekleştirebilmek için öncelikle Liman ve Cernek göllerinden (Samsun, Türkiye) alınan küresel yeşil alglerin farklı klon kültürlerinin izolasyonu gerçekleştirilmiştir. Kültür şartları altında yeşil alglerin morfolojik çeşitliliği gözlemlenerek, bu suşların 18S rRNA gen dizilerine göre fi logenetik ilişkileri belirlenmiştir. DNA dizi analizine göre 2 izolatın Scenedesmus subspicatus (98%) ve Desmodesmus sp. (100%) türlerine çok benzeklik gösterdikleri tespit edilmiştir

Seasonal succession and diversity of phytoplankton in a eutrophic lagoon (Liman lake)

The seasonal succession, composition and diversity of phytoplankton in a eutrophic lagoon (Liman lake) were studied between January 2002 and November 2003. Samples were collected from surface water and deeper (1m depth) at stations and species diversity (Shannon-Weaver, H) and evenness were calculated. Shannon Diversty was similar at Station 1 and Station 2. Minimum and maximum diversity values (0.101 and 0.765 bits.mm-3) were recorded in June and July 2003 at Station 2. Cluster analysis and NMDS (Non metric multidimensial scaling) were applied to the phytoplankton community. The lagoon exhibits high conductivity (7211-10757 µScm-1), mean temperature of 17.7oC, varying concentrations of dissolved oxygen (3.3-8.4 mgl–l). Light, temperature, rainfall, turbidity and salinity were expected to be the main factors affecting the seasonal succession. The seasonal succession of phytoplankton were similar at surface water and 1m depth. A total of 130 taxa belonging to Bacillariophyta, Chlorophyta, Euglenophyta, Cyanophyta, Dinophyta, Xantophyta, Chrysophyta and Cryptophyta divisions were identified. Pseudanabaena limnetica, Kirchneriella obesa, Kirchneriella lunaris, Ankistrodesmus falcatus and Ankistrodesmus spiralis were highly represented

New records for marine phytoplankton of Turkish seas from southern Black Sea coasts

Six new records for Turkish Marine Phytoplankton are reported first time from southern Black Sea coastal waters. One of these taxa was from Zygnematophyceae, four were from Bacillariophyceae and one was from Fragilariophyecae.Güney Karadeniz kıyısal sularında Türkiye denizleri fitoplanktonu için 6 yeni kayıt ilk kez rapor edilmiştir. Tanımlanan taksonlardan biri Zygnematophyceae, dördü Bacillariophyceae ve biri Fragilariophyecae sınıflarına aittir

Taxonomical and numerical comparison of epipelic algae from balik and uzun lagoon, Turkey

The epipelic algae of Balik lagoon and Uzun lagoon were investigated from May 2003 to December 2004. A total of 106 taxa were identified. Of these, 85 were found in Balik lagoon and 78 were found in Uzun lagoon. Water temperature of the lagoons ranged from 6.5 to 24.5oC during the sampling period. Conductivity, hardness, dissolved oxygen an pH values varied between 0.70 and 8.00 mS, 26.00 and 86.60 of, 3.50 and 9.00 mg l -1 and 7.82 and 8.70 respectively. Nitrite nitrogen, nitrate nitrogen, chloride, phosphate phosphorus and sulphate concentrations in the water were also measured and ranged from 0.01 to 0.14, 0.01 to 0.24, 2.41 to 48.70, 0.01 to 0.12 and 54.00 to 104.40 mg l -1 respectively. Species richness (d), diversity (Shannon – Weaver, H’) and evennes ( J’) were calculated for epipelic algae and the findings showed similar oscillations throughout the research period. Cluster analyses and multidimensional scaling (MDS) revealed a similar distribution pattern of epipelic algal flora in both lagoons