Year: 1985
Type: article
Abstract: 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 (1/ϕµ) and photosynthesis (1/ϕp) 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 a and differences in chlorophyll: carbon ratios.
Source: Limnology and Oceanography
Authors: Paul G. Falkowski, Zvy Dubinsky, Kevin Wyman
Institutions: Brookhaven National Laboratory, Bar-Ilan University
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: bronze
Funder: U.S. Department of Energy
Award: G969889393
OpenAlex ID: W2002951050