ISSN:
1573-5117
Keywords:
bioassay
;
nitrogen
;
nitrogen fixation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The significance of nitrogen for algal growth was studied in Lake Vesijärvi in 1979 and 1980 by algal bioassay, using Selenastrum capricornutum and Anabaena cylindrica as test organisms. Nitrogen limited the growth of Selenastrum for the major part of the investigation period, while phosphorus seemed to be the most limiting factor for Anabaena. This difference was reflected in the in situ succession of phytoplankton. As the ratio of inorganic nitrogen to phosphate phosphorus became smaller, nitrogen-fixing blue-green algae became dominant. Nitrogen fixation was greatest at the beginning of July, coinciding with maximum heterocyst numbers.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00005791
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