Microbial Loop Populations: Their Abundances and Trophodynamics in the Gulf of Aqaba, Red Sea

Hamed A. EL-SEREHY; Khaled A. AL-RASHEİD; Hesham SHAFİK

Makale detayları

Microbial Loop Populations: Their Abundances and Trophodynamics in the Gulf of Aqaba, Red Sea

Yazarlar:

Hamed A. EL-SEREHY | Khaled A. AL-RASHEİD | Hesham SHAFİK

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 3

Belge Tipi:

Makale

Yayın Tarihi:

5/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000838273

Sıklık:

Üç Aylık

pISSN:

1303-2712

Anahtar kelimeler:

Özet:

 

Population densities of filter feeding ciliates in the water of the three marine protectorates of Ras Mohammed, Nabq and Abu Galoum in the Gulf of Aqaba at the northern Red Sea, were estimated during the period from November 2006 to November 2007. Also, autotrophic nanoflagellates, heterotrophic nanoflagellates and heterotrophic bacteria were characterised in order to gain some indication of the food resources for ciliates. The abundance of ciliates in the waters of the three protectorates were found to vary according to an annual cycle, with the highest ciliate numbers of 2.5x104 cells L-1 occurring in the spring and the lowest numbers of 0.2x104 cells L-1 occurring in the summer. Abundances were at times eightfold higher than those found in comparable studies of nutrient-poor pelagic systems and approached those observed in coastal waters and in more productive open ocean systems. Nanoflagellates that could provide a food supply for the filter feeding ciliates were especially numerous during spring, and it is confirmed that the production of bacteria is an important component at the base of this food chain in the waters of the three marine protectorates. The study explored these food chain relationships by calculating the potential rate of capture of prey and the clearance rate of heterotrophic nanoflagellates and filter feeding  ciliates. The study also compared the filtration rates of heterotrophic flagellates and of filter feeding ciliates. 	 	 		 .

 

Population densities of filter feeding ciliates in the water of the three marine protectorates of Ras Mohammed, Nabq and Abu Galoum in the Gulf of Aqaba at the northern Red Sea, were estimated during the period from November 2006 to November 2007. Also, autotrophic nanoflagellates, heterotrophic nanoflagellates and heterotrophic bacteria were characterised in order to gain some indication of the food resources for ciliates. The abundance of ciliates in the waters of the three protectorates were found to vary according to an annual cycle, with the highest ciliate numbers of 2.5x104 cells L-1 occurring in the spring and the lowest numbers of 0.2x104 cells L-1 occurring in the summer. Abundances were at times eightfold higher than those found in comparable studies of nutrient-poor pelagic systems and approached those observed in coastal waters and in more productive open ocean systems. Nanoflagellates that could provide a food supply for the filter feeding ciliates were especially numerous during spring, and it is confirmed that the production of bacteria is an important component at the base of this food chain in the waters of the three marine protectorates. The study explored these food chain relationships by calculating the potential rate of capture of prey and the clearance rate of heterotrophic nanoflagellates and filter feeding  ciliates. The study also compared the filtration rates of heterotrophic flagellates and of filter feeding ciliates. 	 	 		 .

Makale detayları

Microbial Loop Populations: Their Abundances and Trophodynamics in the Gulf of Aqaba, Red Sea

Yazarlar:

Hamed A. EL-SEREHY | Khaled A. AL-RASHEİD | Hesham SHAFİK

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 3

Belge Tipi:

Makale

Yayın Tarihi:

5/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000838273

Sıklık:

Üç Aylık

pISSN:

1303-2712

Nanoflagellates

ciliates

bacteria

natural protectorates and marine parks

Gulf of Aqaba

Red Sea

Sayı

Makale detayları

Microbial Loop Populations: Their Abundances and Trophodynamics in the Gulf of Aqaba, Red Sea

Yazarlar: Hamed A. EL-SEREHY | Khaled A. AL-RASHEİD | Hesham SHAFİK

Yayıncı: Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi: Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 3

Belge Tipi: Makale

Yayın Tarihi: 5/2012

Belge Dili: Türkçe

Document ID (Org No.): 2000838273

Sıklık: Üç Aylık

pISSN: 1303-2712

Nanoflagellates

ciliates

bacteria

natural protectorates and marine parks

Gulf of Aqaba

Red Sea

Sayı

Yazarlar:

Hamed A. EL-SEREHY | Khaled A. AL-RASHEİD | Hesham SHAFİK

Yayıncı:

Trabzon Su Ürünleri Merkez Araştırma Enstitüsü

Dergi:

Turkish Journal of Fisheries and Aquatic Sciences 2012 Vol.12 Issue 3

Belge Tipi:

Makale

Yayın Tarihi:

5/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000838273

Sıklık:

Üç Aylık

pISSN:

1303-2712