ISSN:
1573-5117
Keywords:
sediment
;
bacteria
;
estuary
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Total oxygen uptake, bacterial oxygen uptake, total bacterial biomass and active bacterial biomass were determined at the sediment-water interface at two stations in the brackish Roskilde Fjord between September and December in 1986 before, during and after sedimentation of a phytoplankton bloom. Bacterial oxygen consumption was separated from total oxygen consumption by addition of cycloheximide. The fractional and the absolute bacterial oxygen uptake were greatest at the most eutrophic station, where total oxygen uptake was 870–1740 mg O2 m−2 d−1 and the bacterial oxygen uptake was 232–870 mg O2 m−2 d−1. At the less eutrophic station, total oxygen uptake was 725–1740 mg O2 m−2 d−1. and bacterial oxygen uptake was 200–550 mg O2 m−2 d−1. Active bacterial biomass was separated from total bacterial biomass by addition of the terminal electron acceptor INT-formazan. The active bacterial biomass was 70–120 µg C mg−1 ww of sediment at the most eutrophic station and 50–90 µg C g−1 ww of sediment at the other station. Differences in capacity of bacterial oxygen uptake between the two stations correlated to the active bacterial biomass. The non-temperature dependent bacterial oxygen uptake correlated with the sedimentation rate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00026220
Permalink
