A Diel Periodicity in the Optimum Light Intensity for Maximum Photosynthesis in Natural Phytoplankton Populations
Diurnally the optimum light intensity for maximum photosynthesis (I max ) of arctic pond phytoplankton was found to change from a high of approximately 0.15 ly/min during the brightest portion of the day to a low of approximately 0.03 ly/min of photosynthetically available illumination when light wa...
| Published in: | Journal of the Fisheries Research Board of Canada |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Canadian Science Publishing
1969
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/f69-047 http://www.nrcresearchpress.com/doi/pdf/10.1139/f69-047 |
| Summary: | Diurnally the optimum light intensity for maximum photosynthesis (I max ) of arctic pond phytoplankton was found to change from a high of approximately 0.15 ly/min during the brightest portion of the day to a low of approximately 0.03 ly/min of photosynthetically available illumination when light was minimal. It is suggested that a similarity in the I max need not indicate a similarity in species composition. A maximum efficiency of light utilization (maximum carbon fixed/ly) was found at approximately 0.03 ly/min. A balance between light intensity and efficiency of light utilization determined the I max . |
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