Variations in ammonium enhancement, an indication of nitrogen deficiency in New England coastal phytoplankton populations
Journal Article
·
· J. Mar. Res.; (United States)
OSTI ID:5967159
Phytoplankton populations in the coastal waters of the Gulf of Maine have been tested for cellular nitrogen deficiency by adding ammonium to the dark bottle in a conventional /sup 14/C experiment. In phytoplankton cultures it has been shown that under conditions of nitrogen limitation to growth, accelerated dark fixation after ammonium addition signals the onset of cellular nitrogen deficiency. The field studies show that ammonium enhanced carbon fixation is correlated with bloom growths of phytoplankton. Most enhancement occurs with terminal chlorophyll concentrations indicating that these blooms are limited by nitrogen. It is proposed that in these coastal waters the seasonal sequence is regulated by two sets of kinetics. One is referred to as basal where population size is controlled by the recycling of ammonium. The other is referred to as bloom; these populations arise by the introduction of nitrate into the euphotic zone by vertical mixing.
- Research Organization:
- Bigelow Lab. for Ocean Sciences, West Boothbay Harbor, ME
- OSTI ID:
- 5967159
- Journal Information:
- J. Mar. Res.; (United States), Journal Name: J. Mar. Res.; (United States) Vol. 35:3; ISSN JMMRA
- Country of Publication:
- United States
- Language:
- English
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Tue May 01 00:00:00 EDT 1979
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·
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·
OSTI ID:5951634
Related Subjects
550500* -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
AQUATIC ORGANISMS
ATLANTIC OCEAN
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
CARBON 14
CARBON ISOTOPES
CARBOXYLIC ACIDS
CHLOROPHYLL
COASTAL WATERS
CRYOGENIC FLUIDS
ELEMENTS
EVEN-EVEN NUCLEI
FLUIDS
GULF OF MAINE
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ISOTOPES
LIGHT NUCLEI
NITROGEN
NONMETALS
NUCLEI
NUTRITIONAL DEFICIENCY
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYTOCHROMES
PHYTOPLANKTON
PIGMENTS
PLANKTON
PORPHYRINS
RADIOISOTOPES
SEAS
SURFACE WATERS
YEARS LIVING RADIOISOTOPES
59 BASIC BIOLOGICAL SCIENCES
AQUATIC ORGANISMS
ATLANTIC OCEAN
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL EFFECTS
CARBON 14
CARBON ISOTOPES
CARBOXYLIC ACIDS
CHLOROPHYLL
COASTAL WATERS
CRYOGENIC FLUIDS
ELEMENTS
EVEN-EVEN NUCLEI
FLUIDS
GULF OF MAINE
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ISOTOPES
LIGHT NUCLEI
NITROGEN
NONMETALS
NUCLEI
NUTRITIONAL DEFICIENCY
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYTOCHROMES
PHYTOPLANKTON
PIGMENTS
PLANKTON
PORPHYRINS
RADIOISOTOPES
SEAS
SURFACE WATERS
YEARS LIVING RADIOISOTOPES