NITROGEN-SOURCE FOR UPTAKE BY GYRODINIUM CF AUREOLUM IN A TIDAL FRONT

Autor: LeCorre, P, L'Helguen, Stéphane, Wafar, M
Přispěvatelé: Université de Brest (UBO), CSIR National Institute of Oceanography [India] (NIO)
Jazyk: angličtina
Rok vydání: 1993
Předmět:
Zdroj: Limnology and Oceanography
Limnology and Oceanography, Association for the Sciences of Limnology and Oceanography, 1993, 38 (2), pp.446-451. ⟨10.4319/lo.1993.38.2.0446⟩
ISSN: 0024-3590
1939-5590
DOI: 10.4319/lo.1993.38.2.0446⟩
Popis: International audience; Measurements of ammonium and nitrate uptake by a Gyrodinium bloom in the Ushant frontal region showed that ammonium is the preferred form and its assimilation provides 90% of the N required. Uptake (3.75 mmol m-2 h-1) and regeneration (3.41 mmol m-2 h-1) of ammonium were tightly coupled. Regenerative flux of ammonium was through a microbial loop of bacteria, nanoflagellates, and ciliates in the size fraction < 30 mum. Comparison of the conditions before and after the bloom formation, and a mass balance of N, shows that the G. aureolum bloom in the frontal region can be maintained almost exclusively by in situ remineralization of remnants of previous diatom blooms.
Databáze: OpenAIRE
Externí odkaz: