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Growth Irradiance as a Factor Controlling the Dark Respiration Rates of Marine Phytoplankton

Published online by Cambridge University Press:  11 May 2009

Giovanni Daneri ,
Arantza Iriarte ,
Virginia M. Garcia ,
Duncan A. Purdie  and
David W. Crawford
Giovanni Daneri
Affiliation:
Marine Microbiology Group, Department of Oceanography, The University, Southampton, SO9 5NH.
Arantza Iriarte
Affiliation:
Marine Microbiology Group, Department of Oceanography, The University, Southampton, SO9 5NH.
Virginia M. Garcia
Affiliation:
Departamento de Oceanografia Fundacao, Universidade do Rio Grande, 9600 Rio Grande-RS, Brazil.
Duncan A. Purdie
Affiliation:
Marine Microbiology Group, Department of Oceanography, The University, Southampton, SO9 5NH.
David W. Crawford
Affiliation:
Marine Biological Station, Millport, Isle of Cumbrae, Scotland, KA28 OEG.
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Extract

Respiration rates normalized to chlorophyll a of laboratory cultures of Brachiomonas sp., Gyrodinium aureolum, Synechococcus sp. (clone WH 7803), Pycnococcus provasolii (clone W48–23) and Phaeocystis sp. showed a positive relationship with growth photon flux density (Ig). It is argued that this constitutes an energy conserving strategy of adaptation to conditions of low irradiance. The ratio of respiration to light-saturated rate of photosynthesis (R/Pmax) also showed a decrease with decreasing I. Algal cell size, within the investigated range (0·2 to 1380 pg C cell-1), showed little influence on biomass-specific respiration rates.

Type
Short Communications
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 72 , Issue 3 , August 1992 , pp. 723 - 726
Copyright
Copyright © Marine Biological Association of the United Kingdom 1992

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