Microplanktonic ATP-biomass and GTP-productivity associated with upwelling off Pt. Sur, California

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Author
Bronsink, Sherman Hughes
Date
1980-09Advisor
Traganza, E.D.
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Show full item recordAbstract
Microplanktonic ATP-biomass and GTP-productivity were
studied in upwelling features off Pt. Sur, California. Biomass,
determined by adenosine triphosphate (ATP) and chlorophyll-
a, was found to have a definite preferential location
in the strong gradients of temperature and nutrients on the
equatorward edge of the feature.
Productivity, as sampled using the new method of guanosine
triphosphate (GTP) sampling was found to be high throughout
the thermo-nutrient gradient associated with an upwelling
feature in an early stage of development.
The measurement of productivity and "growth potential"
using GTP and GTP/ATP ratios was found to be a valuable tool
in examining rapidly changing upwelling features. Preliminary
results obtained using the GTP technique suggest a relationship
between the flux of nutrients across ocean fronts and
planktonic productivity associated with frontogenic coastal
upwelling systems.
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