Nitrogen fixation by cyanobacteria stimulates production in Baltic food webs
Number of Authors: 13
2015 (English)In: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 44, 413-426 p.Article in journal (Refereed) Published
Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N-2 allows cyanobacteria to circumvent the general summer nitrogen limitation, while also generating a supply of novel bioavailable nitrogen for the food web. However, the fate of the nitrogen fixed by cyanobacteria remains unresolved, as does its importance for secondary production in the Baltic Sea. Here, we synthesize recent experimental and field studies providing strong empirical evidence that cyanobacterial nitrogen is efficiently assimilated and transferred in Baltic food webs via two major pathways: directly by grazing on fresh or decaying cyanobacteria and indirectly through the uptake by other phytoplankton and microbes of bioavailable nitrogen exuded from cyanobacterial cells. This information is an essential step toward guiding nutrient management to minimize noxious blooms without overly reducing secondary production, and ultimately most probably fish production in the Baltic Sea.
Place, publisher, year, edition, pages
2015. Vol. 44, 413-426 p.
Diazotrophic cyanobacteria, Food webs, Zooplankton grazing, Secondary production, Fish
Environmental Engineering Earth and Related Environmental Sciences
Research subject Marine Ecology
IdentifiersURN: urn:nbn:se:su:diva-122130DOI: 10.1007/s13280-015-0660-xISI: 000362290800009OAI: oai:DiVA.org:su-122130DiVA: diva2:864333