Changes in photosynthetic metabolism of sea-ice microalgae during a spring bloom in McMurdo Sound
Microalgae, primarily diatoms, bloom in the lower layers of coarse-grained congelation ice and platelet ice during the austral spring at McMurdo Sound, Antarctica. The purpose in the 1985-1986 field season was to examine changes in photosynthetic metabolism that occur during the development and decline of the spring bloom of sea-ice microalgae. The authors have proposed that sea-ice microalgae may serve as a model system for studying growth phase-related changes in physiology of natural populations of microalgae. Because they are physically trapped within the brine channels and pockets that permeate sea ice, a single community may be repetitively sampled throughout the bloom period. The seasonal study of photosynthetic metabolism included the following parameters: carbon assimilation into crude fractions of protein, lipids, carbohydrates, and small molecular weight metabolites; carbon assimilation into specific lipid fractions: neutral lipids, glycolipids, and phospholipids; identification of key lipid components by gas chromatography/mass spectrometry; photosynthesis/light relationships; release of extracellular organic carbon; and analysis of pigment composition: chlorophylls, carotenoids, and breakdown products.
- Research Organization:
- National Aeronautics and Space Administration, Moffett Field, CA (USA)
- OSTI ID:
- 7177656
- Journal Information:
- Antarct. J. U.S.; (United States), Journal Name: Antarct. J. U.S.; (United States) Vol. 21:5; ISSN AJUSA
- Country of Publication:
- United States
- Language:
- English
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59 BASIC BIOLOGICAL SCIENCES
ALGAE
ANTARCTIC REGIONS
ANTARCTICA
CARBOHYDRATES
CARBON
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
ELECTROMAGNETIC RADIATION
ELEMENTS
ESTERS
GAS CHROMATOGRAPHY
GLYCOLIPIDS
GROWTH
HYDROGEN COMPOUNDS
ICE
LIPIDS
MASS SPECTROSCOPY
METABOLISM
MONITORING
NONMETALS
ORGANIC COMPOUNDS
ORGANIC MATTER
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHOLIPIDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHYSIOLOGY
PLANTS
POLAR REGIONS
PRODUCTIVITY
PROTEINS
RADIATIONS
SACCHARIDES
SEAWATER
SEPARATION PROCESSES
SPECTROSCOPY
SYNTHESIS
VISIBLE RADIATION
WATER