FN Archimer Export Format PT J TI Release of available nitrogen from river-discharged dissolved organic matter by heterotrophic bacteria associated with the cyanobacterium Microcystis aeruginosa BT AF Purvina, S Béchemin, Christian Balode, M Verite, Celine ARNAUD, Christophe MAESTRINI, Serge Y AS 1:1;2:2;3:1;4:2;5:2;6:2; FF 1:;2:;3:;4:;5:;6:; C1 Latvian Institute of Aquatic Ecology, Daugavgrivas Str. 8, LV-1048 Riga, Latvia Centre de Recherche en Ecologie Marine et Aquaculture de L.Houmeau (CNRS-IFREMER), B.P. 5, F-17137 L.Houmeau, France C2 LHEI, LATVIA IFREMER, FRANCE SI LA ROCHELLE TC 0 UR https://archimer.ifremer.fr/doc/00353/46408/46122.pdf LA English DT Article DE ;Microcystis aeruginosa;Heterotrophic bacteria;DOM;DON;Nitrates;Ammonia AB 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. PY 2010 SO Estonian Journal of Ecology SN 1736-602X PU Estonian Academy Publishers VL 59 IS 3 BP 184 EP 196 DI 10.3176/eco.2010.3.02 ID 46408 ER EF