Ulugöl’de (Ulugöl Tabiat Parkı, Ordu) hidrofitlerin artışı üzerine bir ön inceleme

Öz Ordu ilinde Ulugöl Tabiat Parkı (1194-1240 m, 26.56 ha) içinde bulunan Ulugöl’de su bitkilerinin aşırı çoğalması üzerine 2017 yılı sonbahar başlangıcında bir ön inceleme yapılmıştır. Ulugöl, heyelan enkazından kalan boşluk alanın sularla dolması neticesinde oluşmuş küçük bir göldür. Gölde yaz aylarından itibaren kıyısal (littoral) bölgede yoğun bir su bitkisi gelişimi gözlenmiştir. Yapılan kalitatif ve kantitatif gözlemlerde özellikle submers su bitkilerinden Myriophyllum spicatum L. (başaklı sucivanperçemi) türü gölde belirgin bir yoğunluk oluşturmuştur. Bu türün dışında Potamogeton natans L. (su sümbülü) ile Nymphaea alba L. (beyaz nilüfer) türü de kıyısal bölgede yaygındır. M. spicatum L. Ulugöl’ün yüzeyinde yayılmacı bir türdür. Bu türün aşırı çoğalmasının başlıca nedeni, gölde su seviyesinin azalmasıdır. Son yıllarda küresel ısınma nedeniyle içinde bulunduğumuz subtropikal bölge göllerinde su seviyesi azalmaktadır. Ulugöl yeraltı kaynak sularıyla beslenmektedir. Gölün littoral bölgesindeki sedimentin organik materyallerce zengin olması hidrofitler için optimum koşullar sağlamaktadır. Ulugöl suyunda fiziksel ve kimyasal analiz bulguları gölde kirlilik olmadığını göstermiştir. Göl ötrofikasyon riski taşımamaktadır. Ulugöl “I. sınıf” su kalitesine sahiptir, bu nedenle “çok iyi su” özelliğine sahiptir. Analizler ve indekslerin sonuçlarına göre Ulugöl’ün littoral bölgesinin trofik yapısı mezotrofik/ötrofik karakterdedir.

Anahtar Kelimeler:

Çevresel faktörler, ekolojik kalite, su bitkileri, iklim değişikliği, yayılmacı bitkiler

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