Release of available nitrogen from river-discharged dissolved organic matter by heterotrophic bacteria associated with the cyanobacterium Microcystis aeruginosa

Type Article
Date 2010
Language English
Other localization http://www.kirj.ee/public/Ecology/2010/issue_3/ecol-2010-3-184-196.pdf
Author(s) Purvina S1, Béchemin Christian2, Balode M1, Verite Celine2, Arnaud Christophe2, Maestrini Serge Y2
Affiliation(s) 1 : Latvian Institute of Aquatic Ecology, Daugavgrivas Str. 8, LV-1048 Riga, Latvia
2 : Centre de Recherche en Ecologie Marine et Aquaculture de L.Houmeau (CNRS-IFREMER), B.P. 5, F-17137 L.Houmeau, France
Source Estonian Journal of Ecology (1736-602X) (Estonian Academy Publishers), 2010 , Vol. 59 , N. 3 , P. 184-196
DOI 10.3176/eco.2010.3.02
Keyword(s) Microcystis aeruginosa, Heterotrophic bacteria, DOM, DON, Nitrates, Ammonia
Abstract The use of riverine dissolved organic matter by the heterotrophic bacteria associated with a culture of the cyanobacterium Microcystis aeruginosa and release of simple nitrogen compounds were studied in an experimental series. Bacteria reduced the bulk of dissolved organic nitrogen (DON) by half, but when associated with M. aeruginosa, DON was excreted and its concentration rose by 13%. During the stationary growth phase bacteria released ammonium, doubling the concentration of ammonia as well as of nitrates. Bacteria associated with M. aeruginosa consumed riverine DON and joined the ammonification and nitrification process, supplying cyanobacteria with simple nitrogen compounds.
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Purvina S, Béchemin Christian, Balode M, Verite Celine, Arnaud Christophe, Maestrini Serge Y (2010). Release of available nitrogen from river-discharged dissolved organic matter by heterotrophic bacteria associated with the cyanobacterium Microcystis aeruginosa. Estonian Journal of Ecology, 59(3), 184-196. Publisher's official version : https://doi.org/10.3176/eco.2010.3.02 , Open Access version : https://archimer.ifremer.fr/doc/00353/46408/