Yüksek dozlarda Cd ve Cu'nun Lemna minor üzerindeki kombine toksik etkilerinin modellenmesi

Öz

Yapılan bu çalışmada; kadmiyum (Cd) ve bakırın (Cu), sucul bir makrofit olan Lemna minor üzerinde göstermiş olduğu toksik etkiler belirlenmeye çalışılmıştır. Büyüme inhibisyon değerleri tespit edilerek, bu iki kontaminant varlığındaki inhibisyon modellemelerinin oluşturulması amaçlanmıştır. Test grupları sadece Cd, sadece Cu ve Cd+Cu içerecek şekilde oluşturulmuş olup, bu metallerin test organizması üzerinde kombine toksik etkileri de belirlenmeye çalışılmıştır. 7 gün sürdürülen deney, Cd ve Cu'nun 4 farklı konsantrasyonu (0.2, 0.8, 1.6 ve 3.2 mg L-1) ile yürütülmüştür. Modellemeler için regresyon tahmin analizi kullanılmış olup; lineer, kübik ve kuadratik olmak üzere üç farklı denklem kullanılmıştır. Tüm test gruplarının modelleri incelendiğinde, genel bir inhibisyon trendinden bahsetmek (Cd' nin 0.2 ve 1.6 mg L'lik konsantrasyonları hariç) mümkündür. Oluşturulan modellerin R2 değerleri incelendiğinde; kübik modellerin, lineer ve kuadratik modellere göre daha iyi sonuçlar verdiği ve genel olarak gerçek inhibisyon değerlerine en yakın modelleri oluşturduğu belirlenmiştir.

Anahtar Kelimeler

• kontaminant
• regresyon
• makrofit

Kaynakça

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