Bioassessment of Ecological Status of Three Aegean Reservoirs Based on Phytoplankton Metrics

Year 2018, Volume: 2 Issue: 1, 76 - 99, 24.01.2018

Abuzer Çelekli , Assane Anabi Toudjani Hacı Ömer Lekesiz Seda Kayhan Tolga Çetin

https://doi.org/10.31807/tjwsm.363608

Cited By: 5

Abstract

Avrupa Birliği Su Çerçeve Direktifi’nin uygulanmasıyla
birlikte su kalitesinin değerlendirilmesi büyük önem kazanmıştır. Bu çalışmada,
Türkiye’nin Kuzey Ege Nehir Havzası’nda bulunan üç barajın su kalitesi Akdeniz
Fitoplankton Trofik İndeksi (Med-PTI) ve Fitoplankton Trofik İndeksi (PTI)
kullanılarak değerlendirilmiştir. Veriler üç barajdan 2014 ve 2015 yaz dönemi
arasında mevsimsel olarak toplanmıştır. Üç baraj alkali su özelliği
göstermiştir. En yüksek nutrient değerleri olarak TP (203,5 µg L^-1) Bayramiç Baraj Gölü’nde ve TN (1012,0 µg L^-1) Sevişler Barajı’nde kaydedilmiştir.
Toplamda 120 tür teşhis edilmiş ve türlerin çoğunluğu Bacillariophyta ile
temsil edilmiştir. Fitoplankton türleri ve çevresel değişkenler arasındaki
ilişki multivaryete analizler ile incelenmiştir. Fitoplankton kompozisyonu ve dağılımı
çevresel değişkenler yönetmiştir. Toplam fosfor, ortofosfat, toplam Kjeldahl
azotu, biyolojik oksijen ihtiyacı, toplam organik karbon ve sıcaklık en önemli
faktörler olmuştur. İlk iki CCA ekseni tür verisinin kümülatif yüzde
varyansının %31’ini %97,7 tür-çevre korelasyonu ile açıklamış ve durum Monte
Carlo testi (p= 0,002 ve F = 1,157) ile
doğrulanmıştır. Med-PTI, Ayvacık ve Bayramiç Barajları için iyi su kalitesini gösterirken
Sevişler Barajı’nı orta su kalitesinde indike etmiştir. PTI’ye göre Bayramiç ve
Sevişler Barajları orta ekolojik durumda sınıflandırılmışken Ayvacık Barajı iyi
su kalitesinde indike edilmiştir. Sonuçlara göre, Med-PTI ve PTI’nin Kuzey Ege
Havzası’nda bulunan barajların su kalitesinin değerlendirilmesinde uygun
metrikler olduğu görülmüştür.

Keywords

Water quality, Phytoplankton, Med-PTI, PTI, Reservoir

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