Effects of salinity and source of inocula on germination of Anabaena akinetes from a tidally influenced lake
2006 (English)In: Freshwater Biology, ISSN 0046-5070, E-ISSN 1365-2427, Vol. 51, no 4, 705-716 p.Article in journal (Refereed) Published
1. Sedimentary akinetes (resting stages) may represent significant potential inocula for nuisance blooms of cyanobacteria. We studied the effects of salinity and sediment source on the germination and subsequent growth of Anabaena flos-aquae akinetes from a shallow, tidally influenced lake.
2. Surface sediments collected from littoral and open-water sites were used as inocula to culture A. flos-aquae akinetes in four salinities (0.1, 2.2, 4.4 and 6.5) over 22 days. Akinete germination and development was followed by counting developmental stages every second day.
3. Filament growth, but not akinete germination, was inhibited by salinity and there were significantly fewer filaments at 6.5 than at 0.1 and 2.2. Cultures inoculated with littoral sediment had more akinetes, germlings and filaments than those inoculated with open-water sediment.
4. Sediment is a potential source of inocula for Anabaena blooms in the lake, which potentially could develop solely from this source because germination and subsequent filament growth do not depend on the existence of an initial pelagic Anabaena population.
Place, publisher, year, edition, pages
Blackwell Publishing, 2006. Vol. 51, no 4, 705-716 p.
cyanobacteria, filament growth, resting stage, salinity tolerance, shallow lake
Research subject Limnology
IdentifiersURN: urn:nbn:se:umu:diva-80535DOI: 10.1111/j.1365-2427.2006.01524.xOAI: oai:DiVA.org:umu-80535DiVA: diva2:650226