Evidence of nitrogen fixation by non-heterocystous cyanobacteria in the Baltic Sea and re-calculation of a budget of nitrogen fixation

Nitrogen fixation rates and related plankton parameters were determined at 8 stations in the Baltic proper and Mecklenburg Bay in 1997 and 1998. Nitrogen fixation was measured with15N-tracer method in unenriched samples. Measurable nitrogen fixation rates were found from July to October, with highes...

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Bibliographic Details
Published in:Marine ecology. Progress series (Halstenbek) 2001-04, Vol.214, p.1-14
Main Authors: Wasmund, Norbert, Voss, Maren, Lochte, Karin
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Aphanizomenon
Baltic Sea
Biological and medical sciences
Biomass
Biomass production
Cruises
Cyanobacteria
Cyanophyta
Fundamental and applied biological sciences. Psychology
Marine
Nitrogen
Nitrogen fixation
Nodularia spumigena
Phytoplankton
Plankton
Primary productivity
Sea water ecosystems
Seas
Synecology
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Summary:Nitrogen fixation rates and related plankton parameters were determined at 8 stations in the Baltic proper and Mecklenburg Bay in 1997 and 1998. Nitrogen fixation was measured with15N-tracer method in unenriched samples. Measurable nitrogen fixation rates were found from July to October, with highest rates in August when heterocystous cyanobacteria formed blooms. Nitrogen fixation rates measured during a moderate bloom in 1998 were related to biomass of heterocystous and coccoid (non-heterocystous) cyanobacteria and primary production. The size fraction
ISSN:0171-8630
1616-1599
DOI:10.3354/meps214001