The effect of organic material and inorganic ions on the photosynthetic rate of the red algaBostrychia binderifrom a Florida estuary
✍ Scribed by C. J. Dawes; R. P. McIntosh
- Publisher
- Springer-Verlag
- Year
- 1981
- Tongue
- English
- Weight
- 573 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0025-3162
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✦ Synopsis
Various constituents of spring water (calcium, bicarbonate, nitrate, phosphate, total organic material) influence the response of photosynthetic rate ofBostrychia binderi Harvey to changes in salinity. The rate of photosynthesis increased with a decrease in salinity. The rate of photosynthesis in low salinities was greater in seawater diluted with spring Water than in seawater diluted with distilled water. Elevation of photosynthetic rates in the lower salinities (0 and 5 ppt) was partially due to increased levels of bicarbonate and various nutrients present in natural spring water. The higher calcium levels in spring water resulted in higher photosynthetic rates in plants held for 3 to 7 d in the lower salinities (0 to 5 ppt). Increased levels of calcium in salinities of 5 ppt or higher increased the photosynthetic rate only during the first 7 d of exposure, since acclimation occurred equally in individuals held for 2 to 8 wk in seawater diluted with distilled or spring water. This study suggests that the diverse algal floras, characteristic of estuaries on the west coast of Florida are in part the result of natural spring water mixing with seawater, sustaining the algae over short periods of low salinities.