SPECIES COMPOSITION OF TINTINNIDS İN THE NERITIC WATER OF IZMIR BAY (AEGEAN SEA, TURKEY) AND SEASONAL VARIATIONS

Year 2016, , 20 - 29, 01.01.2016

Fatma Çolak Sabancı , Tufan Koray

https://doi.org/10.3153/JAEFR16003

Abstract

Tintinnid species
composition and abundance were examined seasonal at 9 stations (0.5 m, 5.0 m,
10.0 m and 15.0 m) in Izmir Bay between November 2008 and July 2010. During the
study period, belonging to the class Ciliata, 17 taxa were determined. Stenosemella nivalis, Tintin­nopsis cylindrica and Undella hyalina were the dominant
species observed in almost all the stations. The lowest number of species was
found in April 2009 with 3 species whereas the highest number of species was
determined in March 2010 with 12 species. The minimum and the maximum cell
density of the class Ciliata were observed in April 2009 (0.039x10³ cell lt^-1),
and
July 2010 (152x10³
cell lt^-1) respectively. In this period, the species with respect
to the high cell density were Helicostomella subulata, Salpingella
decurtata and Steenstrupiella ste­enstrupii. These
three species reached their maximum cell densities in the stations located in
the inner bay where the environment was under the influence of domestic and
industrial was­tewaters. The Shannon-Wiener
diversity index values varied between 0.032 (Station 22) and 2.165 (Station
20).  Additionally, a negative relationship was
determined between tintin­nid and phytoplankton abundance. 

Keywords

Tintinnid species composition, abundance, diversity index, Izmir Bay, Aegean Sea

İZMİR KÖRFEZİ (EGE DENİZİ)’NİN NERİTİK SULARINDA DAĞILIM GÖSTEREN TİNTİNNİD’LERİN TÜR KOMPOSİZYONU VE MEVSİMSEL DEĞİŞİMİ

Abstract

İzmir
Körfezi’nde Ciliata tür komposizyonu ve bolluğu Ka­sım 2008 ile Temmuz 2010
tarihleri arasında 9 istasyonda (0.5 m, 5.0 m, 10.0 m
ve 15.0 m) mevsimsel olarak incelenmiştir. Yapı­lan çalışmalar sonucunda Ciliata
sınıfına ait toplam 17 taksa saptanmıştır. Stenosemella
nivalis, Tintinnopsis cylindrica
ve Undella hyalina hemen hemen tüm
istasyonlarda gözlenen baskın türlerdir. 
Çalışmada en düşük tür sayısı 3 tür ile Nisan 2009 döneminde, en yüksek
tür sayısı ise 12 tür ile Mart 2010 döneminde saptanmıştır. Ciliata sınıfındaki en düşük hücre yoğunluğu Nisan 2009
döneminde (0.039x10³ hücre lt^-1), en yüksek hücre yoğunluğu Temmuz 2010 dö­neminde
(152x10³
hücre lt^-1) gözlenmiştir.
Bu dönemde, yüksek hücre yoğunluğuna neden olan türler Helicostomella subulata, Salpingella
decurtata ve Steenstrupiella steen­strupii'
dir. Bu üç tür de evsel ve endüstriyel atıksuların etkisi altında bulunan iç
körfez istasy­onlarında en yüksek hücre yoğunluğuna ulaşmışlardır. Shannon- Wiener çeşitlilik
indeks değeri 0.032-2.165 bits arasında değişmekte, en düşük çeşitlilik indeks
değeri ise 22 nolu ista­syonda, en yüksek çeşitli­lik indeks değeri ise 20 nolu
istasyonda saptanmıştır. Ayrıca yapılan çalışmada tintinnid bollu­ğunun
fitoplankton bolluğu ile negatif yönlü bir ilişki gösterdiği saptanmıştır.

Keywords

Tintinnid tür komposizyonu, bolluk, çeşitlilik indeksi, İzmir körfezi, Ege Denizi

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