Seasonal variation in light- and temperature-dependent growth of marine planktonic diatoms in in situ dialysis cultures in the Trondheimsfjord, Norway (63°N)
Hegseth, E.N.; Sakshaug, E. (1983). Seasonal variation in light- and temperature-dependent growth of marine planktonic diatoms in in situ dialysis cultures in the Trondheimsfjord, Norway (63°N). J. Exp. Mar. Biol. Ecol. 67(3): 199-220. https://dx.doi.org/10.1016/0022-0981(83)90039-4
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981; e-ISSN 1879-1697, more
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| Keywords |
Aquatic organisms > Cultured organisms
Composition > Biochemical composition
Composition > Chemical composition
Environmental effects > Light effects
Environmental effects > Temperature effects
Light
Population functions > Growth
Properties > Physical properties > Thermodynamic properties > Temperature
Temporal variations > Periodic variations > Seasonal variations
Skeletonema costatum (Greville) Cleve, 1873 [WoRMS]; Thalassiosira gravida Cleve, 1896 [WoRMS]; Thalassiosira pseudonana Hasle & Heimdal, 1970 [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Hegseth, E.N.
- Sakshaug, E.
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| Abstract |
Three species of diatoms, Skeletonema costatum (Grev.) Cleve, Thalassiosira gravida Cleve, and T. pseudonana (Hustedt) Hasle et Heimdal, were grown in in situ dialysis culture in the Trondheimsfjord at depths of 0.5 and 4 m. The rates of growth and the chemical composition of exponentially growing cells were monitored and related to seasonal changes in illumination and temperature. Functions correlating growth rate with temperature were deduced. Growth took place from February to November. During this period temperature ranged from -1 to 16° C, the average photon flux density (I) )per 24h) from 9 to 570 mu E less than or equal to m-2-1 (0.5 m depth), and the length of the days (I > 1 mu E less than or equal to m-2 ° s-1) from 6 to 24 h. Light-limited growth was evident when the product of the average daily light and the chlorophyll/N ratio was < 10; this occurred mostly in early spring and late autumn. Peak densities (> 800 for the Thalassiosira spp. and > 1300-1400 mu E less than or equal to m-2 less than or equal to s-1 for Skeletonema ) seem to inhibit growth. The highest rates recorded were approximately equals 1.6 doubl. less than or equal to day-1 (July, 15-16° C). The three species also exhibited different ecological behaviour. |
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