Alkaline phosphatase activity of Skeletonema costatum populations in the Trondheimsfjord
Myklestad, S., Sverre; Sakshaug, E. (1983). Alkaline phosphatase activity of Skeletonema costatum populations in the Trondheimsfjord. J. Plankton Res. 5(4): 557-564. https://dx.doi.org/10.1093/plankt/5.4.557
In: Journal of Plankton Research. Oxford University Press: New York,. ISSN 0142-7873; e-ISSN 1464-3774, more
|  |
| Keywords |
Algal blooms
Biology > Physiology > Ecophysiology
Chemical elements > Nonmetals > Phosphorus
Enzymatic activity
Population dynamics > Population change > Population growth
Population growth
Population growth
Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Fjords
Skeletonema costatum (Greville) Cleve, 1873 [WoRMS]
ANE, Norway, Trondheimsfjord [Marine Regions]
Brackish water |
| Authors | | Top |
- Myklestad, S.
- Sakshaug, E.
|
|
|
| Abstract |
During May and June of 1975 and 1976, unialgal blooms of the marine diatom S. Costatum in the Trondheimsfjord exhibited significant alkaline phosphatase activity, as measured by a fluorometric method. The fairly high activities of some populations correlated well with clear indications of P-limitation obtained by measurement of N/P, beta -1,3-glucan/P and protein/ beta -1,3-glucan ratios. Very few significant activities were measured in populations with a cellular N/P ratio below 14, which agrees well with an N to P "balance point" of 11-12 for S. Costatum. The activity was detected in brackish water with S ppt <30 and was found to be closely related with the cellular phosphorus content, low content leading to high phosphatase activity. The ratio of phosphatase activity to cellular phosphorus is proposed as a sensitive parameter for phosphorus-limited growth. No enzyme activity could be detected in coastal waters outside the fjord. |
|
