Nutrient limitation of cyanobacterial blooms: an enclosure experiment from the coastal zone of the NW Baltic properстатья из журнала
Аннотация: MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 239:31-36 (2002) - doi:10.3354/meps239031 Nutrient limitation of cyanobacterial blooms: an enclosure experiment from the coastal zone of the NW Baltic proper Emil Rydin*, Per Hyenstrand, Malin Gunnerhed, Peter Blomqvist Uppsala University, Institute of Evolutionary Biology, Department of Limnology, Norbyv. 20, 752 36 Uppsala, Sweden *E-mail: emil.rydin@ebc.uu.se ABSTRACT: In an enclosure experiment with nutrient additions performed in a western archipelago of the brackish Baltic Sea, cyanobacterial development was stimulated by phosphate additions. Large increases in particulate nitrogen, corresponding to 2.3 g nitrogen m-2 over the 25 d experiment, occurred in 2 enclosures receiving phosphorus but not nitrogen, which indicates a high capacity of nitrogen-fixing cyanobacteria to use molecular (N2) rather than inorganic nitrogen as a source for growth in brackish waters. The amount of nitrogen fixed during the experimental period exceeded values reported from freshwater systems. At the end of the experiment, the phytoplankton community in enclosures receiving phosphate but not nitrate was dominated by filamentous nitrogen-fixing cyanobacteria. Enclosures receiving both phosphate and nitrate reached about the same concentration of phytoplankton biomass but had a lower abundance of nitrogen-fixing cyanobacteria than in bags to which phosphate but not nitrate was added. We hypothesize that the strong response of nitrogen-fixing cyanobacteria to additions of phosphate might be explained by the presence of a high concentration of bioavailable iron (20 µg l-1), as well as favorable weather conditions. KEY WORDS: Nitrogen fixation · Phosphorus limitation · Iron · Baltic Sea Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 239. Online publication date: August 23, 2002 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2002 Inter-Research.
Год издания: 2002
Авторы: Emil Rydin, Per Hyenstrand, Malin Gunnerhed, Peter Blomqvist
Издательство: Inter-Research
Источник: Marine Ecology Progress Series
Ключевые слова: Marine and coastal ecosystems, Aquatic Ecosystems and Phytoplankton Dynamics, Marine Biology and Ecology Research
Открытый доступ: bronze
Том: 239
Страницы: 31–36