Values of net compensation irradiation and their dependence on photosynthetic efficiency and respiration in marine unicellular algae
✍ Scribed by L. A. Hobson; K. P. Guest
- Publisher
- Springer-Verlag
- Year
- 1983
- Tongue
- English
- Weight
- 624 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0025-3162
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✦ Synopsis
Daily compensation irradiation for net photosynthetic rates (~'Icomp) of Skeletonema costatum (Greville) Cleve, Chaetoceros ceratosporum Ostenfeld, Nitzschia sp., Thalassiosira nordenskiOldii Cleve, and Chroomonas salina (Wislouch) Butcher were measured during 1979 to obtain values for use in ecological models describing compensation and critical depths of marine phytoplankton. Batch cultures of these unicellular algae were exposed to temperatures and photoperiods varying from 6 ~ to 15 ~ and 8.4 to 16.0 h, conditions typical of surface water in Saanich Inlet, a fjord in Vancouver Island, British Columbia, Canada. Results obtained with S. costatum and T. nor-denskiOldii provided estimates of ~Icomp varying between cluded in this paper, by measuring daily rates of lightlimited net photosynthesis. Measurements were made for 5 species of marine unicellular algae, grown in batch culture and exposed to temperatures and photoperiods approximating normal seasonal conditions in surface waters of Saanich Inlet.