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Weekly Variations in Phytoplankton Structure of a Harbour in Mersin Bay north eastern Mediterranean
Date
2000-01-01
Author
Eker Develi, Elif
Kıdeyş, Ahmet Erkan
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Weekly variations in the phytoplankton composition of a harbour in Mersin Bay were studied with two methods: filtration for the assessment of >55 μm phytoplankton from July 1995 to June 1997; and sedimentation for the assessment of all phytoplankton (both>55 μm and <55 μm) between 15 February and 25 May in 1996. With both sampling methods, a total of 175 phytoplankton species were identified. In the filtered samples, the total diatom abundance was much higher than that of dinoflagellates. The highest diatom abundance was detected on 8 February 1996 (11.7x103 cells 1-1) and 19 June 1997 (11.1x103 cells 1-1), represent mainly by the species Asterionella japonica Cleve and Rhizosolenia alata Brightwell respectively. The highest dinoflagellate abundance (737 cell 1-1) in the filtered samples occurred on 4 April 1996. However, on the following day a dinoflagellate (Prorocentrum micans Ehrenberg) bloom was found in great numbers (90.9x106 cells 1-1) in the sedimented samples. When this number was compared with the P. micans abundance of the previous day (3.1x106 cell 1-1) in the sedimented samples, the growth rate of this species was calculated as ~3.37 day-1. In this study, two techniques of phytoplanton analysis (sedimentation and filtration through a 55 μm mesh) were compared, the advantages and disadvantages of both methods were assessed, and it was concluded that both techniques should be applied during the process of phytoplankton enumeration. The contribution of small forms, mostly coccolithophorids and small flagellates (<20 μm), to the total phytoplankton abundance was found to be 37±21%.
Subject Keywords
Mediterranean
,
Nanoplankton
,
Phytoplankton composition
,
Size groups
URI
https://hdl.handle.net/11511/71520
https://www.scopus.com/record/display.uri?eid=2-s2.0-0034101270&origin=resultslist&sort=plf-f&src=s&st1=&st2=&sid=2cd898b4de7fec68f9f3fdc5211ab81e&sot=b&sdt=b&sl=115&s=TITLE-ABS-KEY+%28Weekly+Variations+in+Phytoplankton+Structure+of+a+Harbour+in+Mersin+Bay+north+eastern+Mediterranean%29&relpos=0&citeCnt=32&searchTerm=
Journal
Turkish Journal Of Botany
Collections
Graduate School of Marine Sciences, Article
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E. Eker Develi and A. E. Kıdeyş, “Weekly Variations in Phytoplankton Structure of a Harbour in Mersin Bay north eastern Mediterranean,”
Turkish Journal Of Botany
, pp. 13–24, 2000, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/71520.