Excessive growth of Cladophora laetevirens (Dillwyn) Kutzing and enteric bacteria in mats in the Southwestern Istanbul coast, Sea of Marmara

Year 2013, Volume: 72 Issue: 2, 43 - 50, 12.05.2014

Neslihan Balkıs , Nüket Sivri , Linda Fraim , Muharrem Balcı Turgay Durmuş Atakan Sukatar

Abstract

In the summer of 2010, the excessive growth of

Cladophora laetevirens

along the southwestern shoreline

of Istanbul, which carries great importance for tourism, drew major attention. The aim of this study was

 

 

to investigate the excessive growth of

Cladophora laetevirens

, some ecological parameters, and the

 

number of total coliform bacteria of surface waters in this region during the summer of 2010. During this

period, this species multiplied and mucilage like environment was formed and the total coliform bacteria

values were found to be between 10

5 and 108

MPN/100 mL. Due to the lack of available evidence prior to

the sampling, it is possible that the excessive mucilage formation may have been trigged by

 

 

 

Cladophora

laetevirens

 

 

. Cladophora

samples were collected on different sampling dates during the 2010 summer

(July and August). On these sampling days, the temperature, salinity and dissolved oxygen levels of the

 

seawater ranged between 26.6-28°C, 14-33 ppt, and 8.2-9.7 mg/L, respectively. Nitrate+nitrite-N (0.21-

 

0.26 μg-at/L), Ammonium-N (0.43-0.94 μg-at/L), Phosphate-P (0.53-3.50 μg-at/L), Silicate-Si (9.63-

 

15.30 μg-at/L) and Chlorophyll

 

 

a

(3.68-14.11 μg/L) concentrations were measured.

 

Keywords

Cladophora mats, total coliform bacteria, mucilage growth, Sea of Marmara.

Excessive growth of Cladophora laetevirens (Dillwyn) Kutzing and enteric bacteria in mats in the Southwestern Istanbul coast, Sea of Marmara

Abstract

Turizm için büyük önem taşıyan İstanbul Güneybatı sahilinde, 2010 yılı yazında, Cladophora laetevirens’in aşırı büyümesi oldukça dikkat çekmiştir. Bu çalışmanın amacı, 2010 yılı yaz aylarında gözlenen artışın etkenleri arasında bulunan Cladophora laetevirens türünü, ortamın bazı ekolojik özellikleri ve yüzey sularında total koliform bakteri sayısını araştırmaktır. Örnekleme döneminde, bu tür aşırı çoğalarak musilaj benzeri bir yapı oluşturmuş ve o dönem toplam koliform bakteri değerleri de 10 ve 10 MPN/100 mL olarak tespit edilmiştir. Örnekleme dönemi öncesinde bu yapı ortamda gözlenmediğinden, aşırı musilaj oluşumundan bu türün sorumlu olduğu düşünülmüştür. 2010 yılının yaz aylarında farklı tarihlerde (Temmuz ve Ağustos) Cladophora örnekleri toplanmış ve bu esnada, deniz suyu sıcaklığı, tuzluluk ve çözünmüş oksijen değerleri sırasıyla 26,6-28 °C, 14-33 ppt ve 8,29,7 mg/L olarak ölçülmüştür. Ayrıca, Nitrit + nitrat-N (0,21-0,26 μg-at/L), Amonyum-N (0,43-0,94 μg-at/L), Fosfat-P (0,53-3,50 μg-at/L), Silikat-Si (9,63-15,30 μg-at/L) ve Klorofil a (3,68-14,11 μg/L) konsantrasyonları da belirlenmiştir.

Keywords

Cladophora kitleleri, total koliform bakteri, musilaj olayı, Marmara Denizi.

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