Driving factors affecting the phytoplankton functional groups in a deep alkaline lake

Abstract

This study evaluated the phytoplankton communities based on functional groups to obtain information about the water quality of Lake İznik, Turkey. The phytoplankton consisted of 103 taxa, classified in 12 phytoplankton functional groups (PFGs), with dominancy of 5 species, Chrysosporum ovalisporum, Dolichospermum mendotae, Planktothrix rubescens, Fragilaria capucina, and Mougeotia sp. The Shannon-Wiener diversity index (H') was calculated and results ranged between 0.41 and 2.47. The redundancy analysis (RDA) and Spearman's correlation analysis were used to assess the relationships between the PFGs and environmental variables. According to the multiple comparisons of the data, the main efficient factors that determined the seasonal distribution of the PFGs were TP, DO, SiO 2 , SD, and pH. The ecological requirements of the dominant PFGs (

Cyanobacterial Diversity and the Presence of Microcystins in the Küçük Menderes River Basin, Turkey

“…As a result of changing environmental conditions, the increasing presence of harmful algal blooms is an emerging issue (Akcaalan et al 2009;Albay et al 2003;Mariani et al 2015;Wan et al 2020). Several species of Microcystis, Anabaena, Dolichospermum, Cylindrospermopsis, Aphanizomenon, and Nodularia are known to dominate blooms in Turkiye (Albay et al 2005(Albay et al , 2009Koker et al 2021;Oğuz et al 2020). As regards the health risks associated with these groups, the guidelines for cyanobacterial toxins were prepared for drinking and recreational waters (Anonim 2019a;2019b).…”