Güneydoğu Karadeniz Kıyıları Besin Tuzu Dinamiği

Yıl 2024, Cilt: 9 Sayı: 1, 1 - 12, 31.03.2024

Ertuğrul Ağırbaş , Dilek Fidan

https://doi.org/10.35229/jaes.1345147

Öz

Güney Doğu Karadeniz (Artvin-Giresun) kıyıları boyunca Kasım 2014-Ağustos 2016 tarihleri arasında mevsimsel olarak yürütülen bu çalışmada besim tuzu konsantrasyonlarının zamansal ve alansal değişimleri araştırılmıştır. Çalışma kapsamında 12 farklı istasyonda yüzeyden itibaren 10 m aralıklarla 40 m derinliğe kadar mevsimsel örneklemeler yapılmıştır. Çalışma bölgesinde sonbahar ve kış mevsiminde besin tuzu konsantrasyonları yüksek olup ilkbahar ve yaz mevsiminde fitoplanktonik aktiviteye bağlı olarak düşüş göstermiştir. Örnekleme istasyonlarında SiO2 (0,01-13,625 µM) en yüksek konsantrasyonda okunan besin elementi olup, bunu NO2+NO3 (0,001-3,346 µM) takip etmiştir. Bölgede o-PO4 konsantrasyonları (0,001-0,932 µM) genel anlamda düşük bulunmuştur. Çalışma bölgesinde yüzey suyu besin tuzu konsantrasyonları alansal ve zamansal önemli değişimler göstermiş ve kıyısal bölgenin daha zengin olduğu ve açığa gidildikçe konsantrasyonlarda önemli oranda azalmalar tespit edilmiştir. Çalışmanın ikinci yılında silikat ve fosfat konsantrasyonları 2 kata yakın bir oranda artış eğilimi sergilerken benzer bir artış eğilimi nitrit+nitrat için sadece ilkbahar mevsiminde gözlenmiştir. Bu çalışma, bölgede besin tuzu dinamiğinin biyolojik aktiviteye bağlı mevsimsel ölçekte önemli değişimler gösterdiğini gösterirken bölgenin sürekli olarak izlenmesi gerekliliğini de ortaya koymaktadır.

Anahtar Kelimeler

Güney Doğu Karadeniz, Besin Tuzu, Pigment, Fitoplankton

Destekleyen Kurum

TÜBİTAK

Proje Numarası

113Y189

Teşekkür

Bu çalışma TÜBİTAK 113Y189 numaralı proje ile desteklenmiştir. Deniz çalışmaları esnasında yardımlarından dolayı proje ekibine, “R/V SÜRAT ARAŞTIRMA I” ve “R/V KARADENİZ ARAŞTIRMA” gemilerinin kaptan ve gemi adamlarına teşekkür ederiz.

Nutrient Dynamics in the South-Eastern Black Sea

Öz

In the present study, spatio-temporal variations of nutrients from November 2014 to August 2016 were seasonally investigated along the south-eastern coasts (Giresun-Artvin) of the Black Sea. Along the 12 stations, seasonal samplings were obtained from surface to 40 m depths with 10 m intervals. In the study area, nutrient concentrations were high in autumn and winter, but decreased in spring and summer due to phytoplanktonic activity. SiO2 (0.01-13.625 µM) was characterised with high concentrations at the sampling stations, followed by NO2+NO3 (0.001-3.346 µM). The o-PO4 concentrations (0.001-0.932 µM) were generally low in the region. The surface nutrient concentrations in the study area revealed significant spatial and temporal changes, and the concentrations significantly decreases from coastal regions to offshore stations. In the second year of the study, silicate and phosphate concentrations showed a nearly 2-fold increase trend, while a similar increase trend was observed only in spring for nitrite+nitrate. While this study shows that the nutrient dynamics in the region show significant seasonal changes depending on biological activity, it also reveals the necessity of continuous monitoring of the region.

Anahtar Kelimeler

South-Eastern Black Sea, Nutrient, Phytoplankton

Proje Numarası

113Y189

Kaynakça

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