Seasonal succession and diversity of phytoplankton in a eutrophic lagoon (Liman lake).
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Date
2010-09
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Abstract
The seasonal succession, composition and diversity of phytoplankton in a eutrophic lagoon (Liman lake) were studied between
January 2002 and November 2003. Samples were collected from surface water and deeper (1m depth) at stations and species diversity
(Shannon-Weaver, H) and evenness were calculated. Shannon Diversty was similar at Station 1 and Station 2. Minimum and maximum
diversity values (0.101 and 0.765 bits.mm-3) were recorded in June and July 2003 at Station 2. Cluster analysis and NMDS (Non metric
multidimensial scaling) were applied to the phytoplankton community. The lagoon exhibits high conductivity (7211-10757 1Scm-1), mean
temperature of 17.7oC, varying concentrations of dissolved oxygen (3.3-8.4 mgl–l). Light, temperature, rainfall, turbidity and salinity were
expected to be the main factors affecting the seasonal succession. The seasonal succession of phytoplankton were similar at surface
water and 1m depth. A total of 130 taxa belonging to Bacillariophyta, Chlorophyta, Euglenophyta, Cyanophyta, Dinophyta, Xantophyta,
Chrysophyta and Cryptophyta divisions were identified. Pseudanabaena limnetica, Kirchneriella obesa, Kirchneriella lunaris, Ankistrodesmus
falcatus and Ankistrodesmus spiralis were highly represented.
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Keywords
Phytoplankton, Lagoon, Seasonal succession, Liman lake, Kizilirmak Delta, Salinity
Citation
Soylu Elif Neyran, Gonulol Arif. Seasonal succession and diversity of phytoplankton in a eutrophic lagoon (Liman lake). Journal of Environmental Biology. 2010 Sept; 31(5): 629-636.