İzmir körfezi’nde 2008-2010 yılları arasında diyatom tür komposizyonu ve tür çeşitliliğinin mevsimsel değişimi
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Tarih
2011
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info:eu-repo/semantics/openAccess
Özet
Bu araştırmada diyatom tür komposizyonu ve tür çeşitliliği (Shannon-Wiener) değişimleri, iç, orta, dış körfezde yer alan 9 istasyonda (0.5 m, 5.0 m, 10.0 m ve 15.0 m) kalitatif ve kantitatif olarak 2008-2010 yılları arasında mevsimsel olarak (Kasım 2008, Şubat 2009, Nisan 2009, Temmuz 2009, Kasım 2009, Şubat 2010, Mart 2010 ve Temmuz 2010) incelendi. Yapılan çalışmalar sonucunda Bacillariophyceae sınıfına ait toplam 29 cins, 48 tür, 1 varyete ve 3 forma saptanmış, istasyonlara ve örnekleme periyoduna bağlı olarak diyatom yoğunluğunda farklar belirlenmiştir. Aşırı üremeler özellikle iç körfezde bulunan istasyonlarda Şubat 2009 ve 2010 dönemlerinde gözlenmiş ve en yüksek hücre yoğunluğu İstasyon 26’da saptanmıştır, istasyon 22 ve istasyon 24, istasyon 26’yı izlemektedir. Bacillariophyceae türleri hücre yoğunluklarındaki katkılar incelendiğinde Pseudo-nitzschia pungens, Rhizosolenia setigera ve Skeletonema costatum baskınlığı nedeniyle sorumlu türlerdir. Bununla birlikte, Pleurosigma elongatum nisbi bolluğu ve bulunma sıklığı en fazla olan türdür. En yüksek diversite indeks değeri 35 tür ile Şubat 2009 döneminde 4.778 bits hücre-1, en düşük diversite indeks değeri ise 31 tür ile Temmuz 2009 döneminde 0.963 bits hücre-1 olarak saptanmıştır.
In this study, the qualitative and quantitative changes in diatom species composition and species diversity (Shannon-Wiener) were examined seasonal (November 2008, February 2009, April 2009, July 2009, November 2009, February 2010, March 2010 and July 2010) at the 9 stations (0.5 m, 5.0 m, 10.0 m ve 15.0 m) located in the inner, middle and outer Izmir Bay between 2008-2010. A total of 29 species, 48 taxa, 1 variety and 3 forma belonging to the class Bacillariophyceae were determined. the differences in the density of diatom depending on the stations and sampling periods were defined. Excessive growth was observed especially in the the stations located in the inner bay during February 2009 and 2010 and the highest cell density has been identified in station 26, followed by stations 22 and 24. Pseudo-nitzschia pungens, Rhizosolenia setigera and Skeletonema costatum were the dominant species which provided the greatest contributions to the density of species of Bacillariophyceae. However, Pleurosigma elongatum was the species which has the highest relative abundance and frequency. the highest and the lowest diversity index values have been identified in February 2009 with 35 species as 4.778 bits cell-1 and in July 2009 with 31 species as 0.963 bits cell-1 respectively.
In this study, the qualitative and quantitative changes in diatom species composition and species diversity (Shannon-Wiener) were examined seasonal (November 2008, February 2009, April 2009, July 2009, November 2009, February 2010, March 2010 and July 2010) at the 9 stations (0.5 m, 5.0 m, 10.0 m ve 15.0 m) located in the inner, middle and outer Izmir Bay between 2008-2010. A total of 29 species, 48 taxa, 1 variety and 3 forma belonging to the class Bacillariophyceae were determined. the differences in the density of diatom depending on the stations and sampling periods were defined. Excessive growth was observed especially in the the stations located in the inner bay during February 2009 and 2010 and the highest cell density has been identified in station 26, followed by stations 22 and 24. Pseudo-nitzschia pungens, Rhizosolenia setigera and Skeletonema costatum were the dominant species which provided the greatest contributions to the density of species of Bacillariophyceae. However, Pleurosigma elongatum was the species which has the highest relative abundance and frequency. the highest and the lowest diversity index values have been identified in February 2009 with 35 species as 4.778 bits cell-1 and in July 2009 with 31 species as 0.963 bits cell-1 respectively.
Açıklama
Anahtar Kelimeler
Balıkçılık, Zooloji
Kaynak
Su Ürünleri Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
28
Sayı
2
