Honorary Presidents. Symposium Chairman. Organizing Committee Chairman. Scientific Committee Chairman

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2 Honorary Presidents Prof.Dr.Veysel EROĞLU, Ministry of Forestry and Water Affairs Prof.Dr.İsrafil KURTCEPHE, Rector of Akdeniz University Prof.Dr.Mustafa SAATÇİ Rector of Mehmet Akif Ersoy University Prof.Dr.Murat TUNCER, Rector of Hacettepe University Symposium Chairman Prof.Dr. İlhami KIZIROĞLU, Hacettepe University Prof.Dr.Lütfi AKCA, Ministry of Forestry and Water Affairs Organizing Committee Chairman Prof. Dr. Ali ERDOĞAN, Akdeniz University Ahmet ÖZYANIK, General Directorate of Nature Conservation and National Parks (co-chairman) Scientific Committee Chairman Prof. Dr. Kani IŞIK, Akdeniz University Symposium Secretary Assoc.Prof.Dr.Tamer ALBAYRAK, Mehmet Akif Ersoy University i

3 Organizing Committee Prof. Dr. Ali ERDOĞAN, Akdeniz Üniversitesi, Antalya Prof. Dr. Kani IŞIK, Akdeniz Üniversitesi, Antalya Prof. Dr. İlhami KİZİROĞLU, Hacettepe Üniversitesi, Ankara Prof. Dr. Levent TURAN, Hacettepe Üniversitesi, Ankara Doç.Dr.Tamer ALBAYRAK, Mehmet Akif Ersoy Üniversitesi, Burdur Yusuf CERAN, Doğa Koruma Daire Başkanı, Ankara Local Organizing Committee Prof.Dr.Mehmet ÖZ, Akdeniz Üniversitesi, Antalya Doç.Dr. Hüseyin ÇETİN, Akdeniz Üniversitesi, Antalya Osman YÖNTEM, Doğa Koruma Milli Parklar Antalya Şube Müdürü, Antalya Doç..Dr. Hacer SERT, Akdeniz Üniversitesi, Antalya Doç.Dr. Hakan SERT, Akdeniz Üniversitesi, Antalya Doç. Dr. Aziz ASLAN, Akdeniz Üniversitesi, Antalya Yrd.Doç.Dr. Özge ÇETİN, Akdeniz Üniversitesi, Antalya Yrd.Doç.Dr. Orhan ÜNAL, Akdeniz Üniversitesi, Antalya Bekir KABASAKAL, Akdeniz Üniversitesi, Antalya Özgür Can SÖNMEZ, Akdeniz Üniversitesi, Antalya Emre ÖZ, Akdeniz Üniversitesi, Antalya ii

4 Scientific Committee (in alphabetical order) Doç.Dr. Özdemir ADIZEL, Yüzüncü Yıl University, Van Prof.Dr. Galip AKAYDIN, Hacettepe University, Ankara Prof. Dr. Triantphyllos AKRIOTIS, Aegean University, Mytilini Doç.Dr.Tamer ALBAYRAK, Mehmet Akif Ersoy University, Burdur Prof. Dr. Yusuf AYVAZ, Süleyman Demirel University, Antalya Prof Dr. Zafer AYVAZ, Ege University, İzmir Prof. Dr. Müfit BAHADIR, Technicai University of Braunschweig, Braunschweig Prof.Dr.Orhan BİNGÖL Ankara University Prof. Dr. Muammer CANEL, Ankara University, Ankara Prof.Dr.Muharrem CERTEL, Akdeniz University Doç.Dr.Hüseyin ÇETİN, Akdeniz University Doç.Dr. Başar CİVELEK, Işık University Prof. Dr. Aziz EKŞİ, Ankara University, Ankara Prof. Dr. Yalçın ELERMAN, Ankara University, Ankara Prof. Dr. Ali ERDOĞAN, Akdeniz University, Antalya Prof. Dr. Yalçın GÖĞÜS, Middle East Technical University, Ankara Prof.Dr. Mustafa GÖKÇEOĞLU, Akdeniz University Prof. Dr. Ümüt HALIK, University Xinjiang, China, Eichstaett, Germany Doç.Dr. Mehmet GÖKOĞLU, Akdeniz University Prof. Dr. Kani IŞIK, Akdeniz University, Antalya Prof. Dr. İlhami KİZİROGLU, Hacettepe University, Ankara Prof. Dr. Vladimir KONDRATIEV, Russian Academy of Sciences Prof. Dr. Dimitris KOTZIAS, Health and Consumer Protection, European Commission, Italy Prof.Dr. Latif KURT, Ankara University Prof.Dr.Mustafa SARI, Akdeniz University Prof.Dr.Bülent TOP KAYA, Akdeniz University Prof. Dr. Mehmet ÖZ, Akdeniz University, Antalya Prof. Dr. Coşkun ÖZGÜNEL, Ankara University, Ankara Prof. Dr. Saim ÖZKAR, Middle East Technicai University, Ankara iii

5 Prof. Dr. Harun PARLAR, Technical University München, Münih Prof.Namık SARIKAVAK, Hacettepe University, Ankara Prof.Dr. Füsun SİPAHİLER, Hacettepe University, Ankara Prof.Dr. Nihat ŞİŞLİ, Hacettepe University Prof. Dr. Levent TURAN, Hacettepe University, Ankara Prof.Dr.Atilla YETİŞEMİYEN, Ankara University Prof.Dr. Fevzi YILMAZ, Muğla University iv

ISEEP_043 ISEEP 2013 Trophic status and threads of Zinav Lake (Tokat / Turkey) Ekrem Buhan *, Hakan Mete Doğan *, Fatih Polat *, Şenol Akın *, Saliha Dirim Buhan **, Halit Turan *, Orhan Mete Kılıç *

com ** Gebze Institute of Technology University, Kocaeli/Turkey, ceddirim@hotmail.

6 ISEEP_043 ISEEP 2013 Trophic status and threads of Zinav Lake (Tokat / Turkey) Ekrem Buhan *, Hakan Mete Doğan *, Fatih Polat *, Şenol Akın *, Saliha Dirim Buhan **, Halit Turan *, Orhan Mete Kılıç * * Gaziosmanpaşa University, Taşlıçiftlik, Tokat/Turkey; ekrem.buhan@gop.edu.tr, hmdogan@hotmail.com, fatihpolat23@yahoo.com, senol.akin@gop.edu.tr, lincol_hatu_baba@hotmail.com, mete600@hotmail.com ** Gebze Institute of Technology University, Kocaeli/Turkey, ceddirim@hotmail.com Aim: This study aimed to determine ecological threats and trophic level of Zinav Lake which is the biggest natural lake of Kelkit Basin in Tokat, Turkey. Methods: The ecological status and threats to the lake were determined by sampling water and biological (fish and macrophyte density) variables. Field samples were collected and measured on monthly basis during June 2011 and July Standard methods were followed to analyze water (15 parameters), sediment, fish and macrophyte variables. Results: Results of water quality, especially chlorophyll-a, nutrients and secchi depth, showed that the lake displayed hypertrophic characteristics. It was observed that the biggest threat is eutrophication and anoxic layer was found quite high levels in the lake. The other threats can be summarized as household, agricultural and domestic wastes, exotic fish, erosion and the construction of hydroelectric power plants (HES) in the area. Conclusion: Zinav Lake is a natural mountain lake that has mesotrof or oligotrof structure. However, the current environmental threats to the lake have been leading to rapid aging process. As a consequence of such threats, Zinav Lake exhibits evidences of extreme hypertrophic characteristics. This study was funded by TUBİTAK (Project No: 1110Y117). Key words: Zinav Lake, eutrofication, trophic status, threads 92

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