Utilization of inorganic and organic nitrogen by bacteria in marine systems1
Reads0
Chats0
TLDR
In this paper, the NSF grants OCE 83-08753 (to P. A. Wheeler) and OCE 8 1-17834 (to R. E. Hodson) were used to support the research of women in academia.Abstract:
Professorships for Women Program (grant RTI-83 10369) and by NSF grants OCE 83-08753 (to P. A. Wheeler) and OCE 8 1-17834 (to R. E. Hodson).read more
Citations
More filters
Journal ArticleDOI
The interaction between ammonium and nitrate uptake in phytoplankton
TL;DR: To simplify quantification of the interaction between nitrate and ammonium uptake, it is proposed that it be divided into an indirect interaction, preference, and a direct effect, inhibition.
Book ChapterDOI
Oceanic Bacterial Production
Hugh W. Ducklow,Craig A. Carlson +1 more
TL;DR: There has been an explosion of research on marine microbial foodweb processes in the past decade as mentioned in this paper, and it is widely accepted that about 50% of the primary production in marine and fresh water is processed by bacteria each day.
Journal ArticleDOI
Primary production, sinking fluxes and the microbial food web
TL;DR: The model indicates that generalist grazers, zooplankton that consume a broad size spectrum of prey (including pico-and nanoplankton), play a critical role in exporting particles, which could control the average, long-term exports from surface oceanic communities.
Journal ArticleDOI
Regulation of gross growth efficiency and ammonium regeneration in bacteria by substrate C: N ratio1
TL;DR: Natural assemblages of marine bacteria were cultured on combinations of C and N sources (amino acids, glucose, and NH,‘) to span a range of substrate C: N ratios to speculate that C : Ns of available substrates in marine waters is > 10 : 1.
References
More filters
UseofNuclepore Filters forCounting Bacteria by Fluorescence Microscopy
TL;DR: Polycarbonate Nuclepore filters are better than cellulose filters for the direct counting of bacteria because they have uniform pore size and a flat surface that retains all of the bacteria on top of the filter.
Journal ArticleDOI
Uptake of new and regenerated forms of nitrogen in primary productivity1
TL;DR: The role of zooplankton in regenerating nitrogen as ammonia in the Sargasso Sea is examined theoretically in this article, showing that only about 10% of the daily ammonia uptake by phytoplanton living in the upper 100 m.
Journal ArticleDOI
Leucine incorporation and its potential as a measure of protein synthesis by bacteria in natural aquatic systems.
TL;DR: The results demonstrate that the incorporation rate of [3H]leucine into a hot trichloroacetic acid-insoluble cell fraction can serve as an index of protein synthesis by bacterial assemblages in aquatic systems.
Journal ArticleDOI
Growth rate influence on the chemical composition of phytoplankton in oceanic waters
TL;DR: Growth rates of natural phytoplankton populations in oceanic waters may be near maximal and hence non-nutrient limited, but the uniformly low biomass and residual nutrient levels in such waters does not preclude the possibility of high growth rates because Zooplankon grazing and nutrient regeneration within the euphotic zone may keep this highly dynamic system in a balanced state.