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A bloom of Prymnesium parvum Carter and fish mortality occurred in June 1990 in a coastal inlet in Dragsfjärd, southwestern Finland. The highest concentrations of P. parvum exceeded 50,000 cells/mL. Chemical analyses done in early July during the decline of the bloom showed total phosphorus values of 30–36, total nitrogen values of 710–810, and chlorophyll a concentrations below 10μg/L. The levels were about 50% lower in the archipelago outside the inlet where low numbers of P. parvum occurred. Flagella of living P. parvum cells showed an autofluorescence, which may be of diagnostic value.

Online communities have become popular among geographically distributed users of the Internet. However, there is a growing interest to use online communities to support social interaction also in geography-based communities. In this paper, we study the value of online sociability and the possibilities to support local networking by online communities in two different online communities. We present the results of a survey carried out among Finnish users of Facebook, and complement the with user interviews of a local community service of Helsinki city surroundings. The results show that Facebook is used mainly for nourishing existing friendships online and less for organizing local activities and meeting new people. However, the results can be utilized as implications for designing sociability in locationoriented online communities.

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