Madra Çayı (Türkiye)’nın Epilitik Diyatom Kompozisyonu

Abstract

Türkiye’nin Kuzey Ege Nehir Havzası’nda yer alan Madra Çayı, Madra Dağı (1343 m.)’nın Güneybatı yamaçlarından doğar ve Balıkesir ili sınırları içerisinden Ege Denizine dökülür. Bu çalışmada, Su Çerçeve Direktifi (SÇD) yöntemleri kullanılarak Madra Çayı’nın epilitik diyatom kompozisyonu incelenerek, Türkiye tatlısu alg florasının belirlenmesine katkılar sağlamak amaçlanmıştır. Bu amaçla, 2015 ve 2016 yılları arasında, araştırma sahamızda seçilen 7 istasyondan mevsimsel diyatom örneklemeleri yapılmıştır. Örnekleme periyodu süresince, Madra Çayı’nda 48 cinse ait toplamda 100 epilitik diyatom türü teşhis edilmiştir. Çalışma sonucunda, Navicula (13 tür), Nitzschia (5 tür), Cymbella, Gomphonema, Pinnularia ve Surirella (4’er tür) görece en fazla türle temsil edilen cinsler olmuştur. Bu çalışma ile Madara Çayı’nın epilitik diyatom toplulukları ilk kez ayrıntılı olarak incelenmiştir. Epilitik diyatomların varlık-yokluk verisi baz alınarak yapılan hiyerarşik kümelenme analizine (Bray-Curtis) göre, seçilen istasyonlar arasındaki tür kompozisyonu benzerliği %50’nin üzerinde bulunmuştur. Madra Çayı’nın epilitik diyatom kompozisyonunun, çoğunlukla ötrofik ve kısmen de oligo-mezotrofik ortamlara uyumlu türlerden oluştuğu değerlendirilmiştir.

Keywords

• Biyoçeşitlilik
• Alg florası
• Epilitik
• Diyatomlar
• Madra Çayı
• SÇD

Epilithic Diatom Composition of Madra Stream (Türkiye)

Abstract

Madra Stream, located in the Northern Aegean River Basin of Türkiye, rises from the southwestern slopes of Madra Mountain (1343 m.) and flows into the Aegean Sea within the borders of Balıkesir province. In this study, we aimed to contribute to the determination of the freshwater algal flora of Türkiye by investigating the epilithic diatom composition of Madra Stream using Water Framework Directive (WFD) methods. For this purpose, seasonal diatom sampling was conducted at seven stations selected within the study area between 2015 and 2016. During the sampling period, a total of 100 epilithic diatom species belonging to 48 genera were identified in Madra Stream. The results of the study revealed that Navicula (13 species), Nitzschia (5 species), Cymbella, Gomphonema, Pinnularia and Surirella (4 species of each) were the genera with the highest number of species. The epilithic diatom communities of the Madara Stream were examined in detail for the first time with this study. According to the hierarchical cluster analysis (Bray-Curtis) based on the presence-absence data of epilithic diatoms, the species composition similarity between the selected stations was found to be over 50%. It was concluded that the epilithic diatom composition of Madra Stream primarily consists of species adapted to eutrophic and, to a lesser extent, oligo-mesotrophic running water environments.

Keywords

• Biodiversity
• Algal flora
• Epilithic
• Diatoms
• Madra Stream
• WFD

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