Growth Irradiance as a Factor Controlling the Dark Respiration Rates of Marine Phytoplankton
- 1 August 1992
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of the Marine Biological Association of the United Kingdom
- Vol. 72 (3) , 723-726
- https://doi.org/10.1017/s0025315400059488
Abstract
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.Keywords
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