Protected Freshwater Ecosystem with Incessant Cyanobacterial Blooming Awaiting a Resolution

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Nada Tokodi, Damjana Drobac Backović, Jelena Lujić, Ilija Šćekić, Snežana Simić, Nevena Đorđević, Tamara Dulić, Branko Miljanović, Nevena Kitanović, Zoran Marinović, Henna Savela, Jussi Meriluoto, Zorica Svirčev
Publisher: MDPI
Publication year: 2020
Journal: Water
Volume number: 12


Abstract

For 50 years persistent cyanobacterial blooms have been observed in Lake Ludoš (Serbia),
a wetland area of international significance listed as a Ramsar site. Cyanobacteria and cyanotoxins
can affect many organisms, including valuable flora and fauna, such as rare and endangered bird
species living or visiting the lake. The aim was to carry out monitoring, estimate the current status
of the lake, and discuss potential resolutions. Results obtained showed: (a) the poor chemical state
of the lake; (b) the presence of potentially toxic (genera Dolichospermum, Microcystis, Planktothrix,
Chroococcus, Oscillatoria, Woronichinia and dominant species Limnothrix redekei and Pseudanabaena
limnetica) and invasive cyanobacterial species Raphidiopsis raciborskii; (c) the detection of microcystin
(MC) and saxitoxin (STX) coding genes in biomass samples; (d) the detection of several microcystin
variants (MC-LR, MC-dmLR, MC-RR, MC-dmRR, MC-LF) in water samples; (e) histopathological
alterations in fish liver, kidney and gills. The potential health risk to all organisms in the ecosystem
and the ecosystem itself is thus still real and present. Although there is still no resolution in sight,
urgent remediation measures are needed to alleviate the incessant cyanobacterial problem in Lake
Ludoš to break this ecosystem out of the perpetual state of limbo in which it has been trapped for
quite some time.


Keywords

cyanobacteria, Cyanotoxins, harmful algal blooms, microcystin, plankton blooms


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Last updated on 2020-16-02 at 05:13