Seasonal Dynamics of Phytoplankton Assemblages across Nutrient Gradients in Shallow Hypertrophic Lake Manyas, Turkey

Abstract

AbstractÇelik, K. and T. Ongun. 2006. Seasonal dynamics of phytoplankton assemblages across nutrient gradients in shallow hypertrophic Lake Manyas, Turkey. Lake and Reserv. Manage. 22(3):250-260.Species composition, abundance and size distribution (the average measure of the longest cell dimension and surface area to volume ratio) of phytoplankton in the shallow hypertrophic Lake Manyas, Turkey were studied between January 2003 and December 2004. A total of 165 species were recorded during the study. Diatoms and Cyanobacteria were the dominant taxa at most stations. Nitrate and phosphate values showed a decreasing gradient with the distance from Sigirci Inlet to Karadere Outlet. Bacillariophyta dominated the phytoplankton in spring, while Cyanobacteria prevailed in summer. Each summer, a peak of Euglenophyta was also observed at Sigirci Inlet. Nutrient gradients seemed to have a greater control over overall density than of species composition. The size distribution of the Cyanobacteria showed positive correlations with nutrient levels, while green algae and diatoms did not. There was a negative correlation between the average cell dimension of the phytoplankton cells and the surface area to volume ratio in general. The objective of this study was to determine the seasonal dynamics of species composition, abundance and size distribution of phytoplankton assemblages across nutrient gradients along a distance in the shallow hypertrophic Lake Manyas, Turkey.

Limno‐assessment of phytoplankton composition in relation to environmental conditions of lakes in Antalya River Basin

“…The integrated chlorophytes species prefer relatively high nutrients and shallow ecosystems like Lake E gri during the summer, in agreement with previous studies in an artificial pond (Çelekli et al, 2014), hypertrophic Lake Manyas in Turkey (Çelik & Ongun, 2006), and the eutrophic water bodies of Kerala in South India (Ray et al, 2021). present study, Mediterranean shallow lakes contained higher nutrient concentrations.…”

“…Another factor is the excessive evaporation in the summer and fall seasons, which decreases the lake's water level. The integrated chlorophytes species prefer relatively high nutrients and shallow ecosystems like Lake Eğri during the summer, in agreement with previous studies in an artificial pond (Çelekli et al., 2014), hypertrophic Lake Manyas in Turkey (Çelik & Ongun, 2006), and the eutrophic water bodies of Kerala in South India (Ray et al., 2021). Chlorophytes co‐occurred with species of Cyanobacteria like A. circularis in Lake Eğri which is a hypereutrophic ecosystem with regard to the trophic state of TP.…”

Microzooplankton grazing before, during and after a cyanobacterial bloom in Vancouver Lake, Washington, USA

“…Typically, excessive nitrogen and phosphorus (e.g. Elser 1999), low nitrogen-to-phosphorus ratios (Smith 1983, Elser 1999, Oliver & Ganf 2000, and temperatures around 20 to 25°C (Celik & Ongun 2006, de Figueiredo et al 2006, Yamamoto 2009) will favor cyanobacterial blooms.…”

Molecular detection of hepatotoxic cyanobacteria in inland water bodies of the Marmara Region, Turkey

“…The other studied area, Küçükçekmece Lagoon (Istanbul, Turkey), has a connection to the Marmara Sea via a narrow channel. The lagoon is in hypereutrophic conditions and Microcystis aeruginosa (Kützing) Kützing blooms were observed from late spring to mid-autumn (Albay et al, 2005) Manyas Lake is a eutrophic lake which is an important bird sanctuary, and in 1998 it was listed in the Ramsar Convention (Çelik and Ongun, 2006).…”