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Experimental measurements of nitrogen remineralization in coastal waters

Journal Article · · Limnol. Oceanogr.; (United States)
Ammonium remineralization was measured in the euphotic zone of two coastal areas using a /sup 15/N isotope dilution technique. Remineralization fluxes were high in both areas and often exceeded assimilation fluxes. A strong positive correlation between ammonium remineralization and ammonium and carbon dioxide assimilation suggests a close coupling of photosynthesis and nitrogen recycling. Regenerative fluxes decreased with depth and with distance offshore, but to a relatively lesser extent than did assimilative fluxes. Turnover times for remineralization of utilizable organic nitrogen were estimated to be from 3 to 16 days. Size fractionation experiments and estimates from the literature suggest that microplankton (less than 183 ..mu..m) may have been the primary nitrogen remineralizers.
Research Organization:
Univ. of California, San Diego
OSTI ID:
6661871
Journal Information:
Limnol. Oceanogr.; (United States), Journal Name: Limnol. Oceanogr.; (United States) Vol. 23:4; ISSN LIOCA
Country of Publication:
United States
Language:
English

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Related Subjects

520300* -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1989)
520302 -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- Aquatic Ecosystems & Food Chains-- (-1987)
54 ENVIRONMENTAL SCIENCES
AMMONIUM COMPOUNDS
AQUATIC ECOSYSTEMS
AQUATIC ORGANISMS
BRITISH COLUMBIA
CALIFORNIA
CANADA
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COASTAL REGIONS
CRYOGENIC FLUIDS
ECOSYSTEMS
ELEMENTS
FLUIDS
GROWTH
ISOTOPE APPLICATIONS
ISOTOPE DILUTION
ISOTOPES
LIGHT NUCLEI
MINERAL CYCLING
MINERALIZATION
NITROGEN
NITROGEN 15
NITROGEN ISOTOPES
NONMETALS
NORTH AMERICA
NUCLEI
NUTRIENTS
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANKTON
POPULATION DYNAMICS
SHORES
STABLE ISOTOPES
SYNTHESIS
TRACER TECHNIQUES
USA
WESTERN REGION