Abstract


MONITORING A NEWLY RE-BORN PATIENT: PHYTOPLANKTON BASED WATER QUALITY AND CYANOTOXIN OCCURRENCE IN A RECONSTRUCTED SHALLOW MEDITERRANEAN LAKE

Lake Karla (Central Greece) is a unique example – at European scale - of a shallow lake ecosystem that was dried in the 1960s and was restored in 2009. Although the lake is listed in the network of the Greek protected areas as it is considered a vital aquatic ecosystem, in terms of biodiversity it has already been adversely affected by both agricultural and industrial land uses in the surrounding area, leading to eutrophication and shifting algal community towards bloom-forming toxic cyanobacterial species. After repeated heavy-blooms, cyanotoxin occurrence and mass fish kills, local water management authorities have implemented a water quality monitoring program to assess environmental pressures and the response of aquatic biota in the lake. In this study, results of one year (July 2013 - June 2014) monitoring of phytoplankton and cyanotoxin occurrence are presented. Microscopic, immunological, and molecular techniques combined with physico-chemical parameters were used to monitor cyanobacteria blooms and the associated cyanotoxin production from three different sites in Lake Karla and from the adjacent Kalamaki reservoir. Cyanobacteria were the main phytoplankton component, representing more than 60% of the total phytoplankton abundance; dominant taxa belonged to Microcystis spp., Limnothrix redekei, Anabaenopsis elenkinii, and Cylindrospermopsis raciborskii. Euglenophytes (Euglena), diatoms (Nitzschia), and chlorophytes (Scenedesmus) were also important phytoplankton constituents. The occurrence of cyanotoxins in relation to the persistent and dominant cyanobacteria and the impact of CyanoHABs in the newly constructed lake are discussed.

Authors

Gkelis, S., Aristotle University of Thessaloniki, Greece, sgkelis@bio.auth.gr

Chronis, I., Aristotle University of Thessaloniki, Greece, ichronis@auth.gr

Kagalou, I., Management Body of Ecod evelopment Area of Karla , Mavrovouni , Kefalovriso , Velestino, Greece, ifikagalou@gmail.com

Details

Oral presentation

Session #:034
Date: 2/23/2015
Time: 15:45
Location: Room D (Floor -3)

Presentation is given by student: No