Distribution, fluxes and biological utilization of inorganic nitrogen during a spring bloom in the New York Bight
Journal Article
·
· J. Mar. Res.; (United States)
OSTI ID:5372344
The utilization of ammonium (NH/sub 4/) and nitrate (NO/sub 3/) by natural phytoplankton communities was measured during a Ceratium tripos-dominated spring bloom in the New York Bight. During 6 to 8 hour uptake experiments, the inshore phytoplankton communities that were typically located at depths greater than or equal to 25 m were characterized by NH/sub 4/ and NO/sub 3/ uptake rates that were less light-dependent than those of the more uniformly distributed communities at the shelf break. Measurements of NH/sub 4/ utilization, as a percentage of NH/sub 4/ plus NO/sub 3/ utilization, yielded values of 59% inshore and 70% at the shelf break. High biomass of zooplankton at the shelf break suggested they could account for approx. 62% of the regenerate production (i.e, based on NH/sub 4/), while inshore, estimates of regenerated NH/sub 4/ from zooplankton, benthos and bacterioplankton could account for 38 to 53% of the phytoplankton requirements. In the cross-shelf distribution, the ambient concentrations of NH/sub 4/ and NO/sub 3/ in the surface water were approx. 0.4 and approx. 0.1 ..mu..mol L/sup -1/, respectively; however at depths between 25 and 50 m, concentrations of approx. 2and approx. 4 ..mu..mol L/sup -1/ were observed.
- Research Organization:
- Brookhaven National Lab., Upton, NY
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 5372344
- Journal Information:
- J. Mar. Res.; (United States), Journal Name: J. Mar. Res.; (United States) Vol. 37:4; ISSN JMMRA
- Country of Publication:
- United States
- Language:
- English
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Wed Dec 31 23:00:00 EST 1975
·
OSTI ID:7330281
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Journal Article
·
Sun Dec 31 23:00:00 EST 1961
· Radiobiologiya (U.S.S.R.) For English translation see Radiobiology (Engl. Transl.)
·
OSTI ID:4755829
Related Subjects
520100 -- Environment
Aquatic-- Basic Studies-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550500* -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
AMMONIUM COMPOUNDS
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
BENTHOS
ECOLOGICAL CONCENTRATION
ECOLOGY
ECOSYSTEMS
METABOLISM
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHOTOSENSITIVITY
PHYTOPLANKTON
PLANKTON
SENSITIVITY
UPTAKE
ZOOPLANKTON
Aquatic-- Basic Studies-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550500* -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
AMMONIUM COMPOUNDS
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
BENTHOS
ECOLOGICAL CONCENTRATION
ECOLOGY
ECOSYSTEMS
METABOLISM
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHOTOSENSITIVITY
PHYTOPLANKTON
PLANKTON
SENSITIVITY
UPTAKE
ZOOPLANKTON