A bloom of a brown phototrophic sulfur bacterium in lake kinneret: Hydrochemical aspects.

During a bloom of the brown phototrophic sulfur bacteriumChlorobium phaeobacteroides in Lake Kinneret the decisive hydrochemical parameters, pH, pH2S and pe (p=-log activity) were monitored in situ and related to the phototrophic bacterial bloom. The measured data in dicate a strong influence of the phototrophic bacteria on the metalimnic sulfide concentration and on the prevailing redox conditions. The intensity of theC. phaeobacteroides bloom, which appeared in two distinct peaks, could be related to vertical changes of the thermocline.