Growth-irradiance relationships in phytoplankton
Journal Article
·
· Limnol. Oceanogr.; (United States)
The steady state growth rates of three species of marine phytoplankton, Thalassiosira weisflogii, Isochrysis galbana, and Prorocentrum micans, were followed in turbidostat culture. At each growth irradiance, photosynthesis and respiration were measured by following changes in oxygen. Together with measurements of optical absorption cross sections, cellular chlorophyll, carbon and nitrogen, and excretion rates as well as knowledge of the quantum flux, the quantum requirement for growth and photosynthesis were calculated. Our results suggest that variations in growth rate caused by changes in irradiance may be related to changes in respiration rates relative to growth as well as changes in optical absorption cross sections for a given species. Interspecific differences in growth rate at a given irradiance are not related to changes in respiration however, but are primarily attributable to differences in optical absorption cross sections normalized to chlorophyll and differences in chlorophyll:carbon ratios.
- Research Organization:
- Brookhaven National Lab., Upton, NY
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5609558
- Journal Information:
- Limnol. Oceanogr.; (United States), Journal Name: Limnol. Oceanogr.; (United States) Vol. 30:2; ISSN LIOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
551000* -- Physiological Systems
59 BASIC BIOLOGICAL SCIENCES
AQUATIC ORGANISMS
BIOLOGICAL EFFECTS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHLOROPHYLL
DIAGRAMS
DOSE-RESPONSE RELATIONSHIPS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUORESCENT LAMPS
GROWTH
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LIGHT BULBS
NONMETALS
OPTICAL DEPTH CURVE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHYTOCHROMES
PHYTOPLANKTON
PIGMENTS
PLANKTON
PLANT GROWTH
PORPHYRINS
RADIATIONS
RESPIRATION
SPECTROSCOPIC CURVE OF GROWTH
SYNTHESIS
VISIBLE RADIATION
59 BASIC BIOLOGICAL SCIENCES
AQUATIC ORGANISMS
BIOLOGICAL EFFECTS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHLOROPHYLL
DIAGRAMS
DOSE-RESPONSE RELATIONSHIPS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUORESCENT LAMPS
GROWTH
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LIGHT BULBS
NONMETALS
OPTICAL DEPTH CURVE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHYTOCHROMES
PHYTOPLANKTON
PIGMENTS
PLANKTON
PLANT GROWTH
PORPHYRINS
RADIATIONS
RESPIRATION
SPECTROSCOPIC CURVE OF GROWTH
SYNTHESIS
VISIBLE RADIATION