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

被引:43
作者
LECORRE, P [1 ]
LHELGUEN, S [1 ]
WAFAR, M [1 ]
机构
[1] NATL INST OCEANOG,PANAJI 403004,GOA,INDIA
关键词
D O I
10.4319/lo.1993.38.2.0446
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
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.
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收藏
页码:446 / 451
页数:6
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