Nearshore benthic blooms of filamentous green algae in Lake Baikal

Nearshore benthic blooms of filamentous green algae in Lake Baikal

For the first time, species of the genus Spirogyra, non-typical of the open nearshore waters of Lake Baikal, formed algal mats with Ulothrix zonata, Ulothrix tenerrima, and Ulothrix tenuissima near the village of Listvyanka, Russia. Normally widely distributed in the 0- to 1.5-m depth range, the gro...

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Bibliographic Details
Published in:Journal of Great Lakes research Vol. 40; no. 2; pp. 441 - 448
Main Authors: Kravtsova, Lyubov S., Izhboldina, Lyudmila A., Khanaev, Igor V., Pomazkina, Galina V., Rodionova, Elena V., Domysheva, Valentina M., Sakirko, Mariya V., Tomberg, Irina V., Kostornova, Tatyana Ya, Kravchenko, Olga S., Kupchinsky, Aleksander B.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-06-2014
Subjects:
Didymosphenia geminata
Eutrophication
Filamentous green algae
Fragilaria
Fragilaria capucina
Lake Baikal
Nearshore
Nutrients
Spirogyra
Tetraspora cylindrica
Ulothrix tenerrima
Ulothrix tenuissima
Ulothrix zonata
UNESCO heritage site
Russia, Siberia, Baykal L
Nutrients
Lake Baikal
UNESCO heritage site
Filamentous green algae
Nearshore
Eutrophication
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Summary:For the first time, species of the genus Spirogyra, non-typical of the open nearshore waters of Lake Baikal, formed algal mats with Ulothrix zonata, Ulothrix tenerrima, and Ulothrix tenuissima near the village of Listvyanka, Russia. Normally widely distributed in the 0- to 1.5-m depth range, the growth of U. zonata was now evident and dominant (63% of the biomass) in the 2- to 5-m depth range. The overgrowth of the lake bottom by filamentous green algae, changes in distributional boundaries, the emergence and mass development of species of the genus Spirogyra, the presence of the eutrophic diatom indicator Fragilaria capucina var. vaucheriae, elevated abundances of coliform bacteria, and elevated levels of nutrients suggest an early stage of cultural eutrophication in the nearshore of Lake Baikal near Listvyanka, a popular tourist destination. The unusual abundance of Fragilaria associated with the filamentous green algae consisted of long-ribbon colonies of F. capucina var. vaucheriae, a eutrophic species, wound around the filamentous green algae, enhancing the dense algae mats. Historically dominant species, such as Didymosphenia geminata, Tetraspora cylindrica var. bullosa, and Draparnaldioides baicalensis typically observed at deeper depths of Lake Baikal, are now subdominants or minor species in the nearshore along the shoreline near Listvyanka. [Display omitted] •Disturbance of near shore green algae vertical zoning of Lake Baikal was revealed.•For the first time Ulothrix and Spirogyra mats were found at depths up to 10m.•Overgrowing the bottom is due to increased recreational load.
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ISSN:0380-1330
DOI:10.1016/j.jglr.2014.02.019