Nutrient limitation of phytoplankton growth in Georgia nearshore waters
Nutrient enrichment experiments were conducted to investigate the utilization of dissolved organic (DON) and inorganic nitrogen (DIN) by marine phytoplankton in Georgia coastal waters. Natural populations of marine phytoplankton, enriched with different concentrations of ammonium chloride and other plant nutrients, were grown under controlled temperature and irradiance conditions until the populations reached ''stationary phase.'' Results showed that (1) phytoplankton are limited by DIN up to ca. 20 ..mu..M, when another nutrient (phosphate or silicate) becomes limiting, (2) very little naturally-occuring DON is directly utilized for growth, (3) very little DON is indirectly made available for growth over time periods of days to ca. 1 week, and (4) trace metals and vitamins do not significantly limit phytoplankton growth.
- Research Organization:
- Skidaway Institute of Oceanography, Savannah, GA
- DOE Contract Number:
- AS09-76EV00936
- OSTI ID:
- 5751363
- Journal Information:
- Estuaries; (United States), Vol. 7:4B
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
METALS
ENVIRONMENTAL EFFECTS
PHYTOPLANKTON
PRODUCTIVITY
AMMONIUM COMPOUNDS
COASTAL REGIONS
ECOLOGY
GEORGIA
NITROGEN
NUTRIENTS
VITAMINS
AQUATIC ORGANISMS
ELEMENTS
FEDERAL REGION IV
NONMETALS
NORTH AMERICA
PLANKTON
USA
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)