EPILITHIC DIATOM-BASED ECOLOGICAL ASSESSMENT IN TAŞMANLI POND (SINOP, TURKEY)

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.

Anahtar Kelimeler:

Epilithic, Diatom, LTDI, EQR, Pond, Taşmanlı, Sinop, Turkey

EPILITHIC DIATOM-BASED ECOLOGICAL ASSESSMENT IN TAŞMANLI 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.

Keywords:

Epilithic, Diatom, LTDI, EQR, Pond, Taşmanlı, Sinop, Turkey,

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