Abstract
During the last 20–30 years the flagellate Gonyostomum semen has become more abundant in lakes, especially small humic lakes, in Scandinavia. Mass development of the alga has been reported from areas affected by anthropogenic acid deposition, and reports from bathers of health problems are becoming frequent. Although there is an apparent connection between the appearance of Gonyostomum and acidification, it seems not to be the low pH per se that is the cause, but rather interlinked factors. The present tendency towards a wider distribution of the alga in non-humic lakes, emphasizes the importance of a better understanding of small humic lakes.
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Cronberg, G., Lindmark, G. & Björk, S. Mass development of the flagellate Gonyostomum semen (Raphidophyta) in Swedish forest lakes - an effect of acidification?. Hydrobiologia 161, 217–236 (1988). https://doi.org/10.1007/BF00044113
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DOI: https://doi.org/10.1007/BF00044113