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- Title
THE FOOD PRODUCTION IN THE SEA AND THE ANNUAL CYCLE OF FAEROESE MARINE BIRDS.
- Authors
Salomonsen, Finn
- Abstract
The article cites a study on the food production in the sea and the annual cycle of faeroese marine birds. The considerable length of the period in which phytoplankton production takes place is due to the fact that in these waters a pronounced mixing of the surface water with deepsea water, rich in nitrates and phosphates, takes place during the whole summer. In areas with stabilized water-masses, without any up welling of bottom-water, the phytoplankton production will cover one month only. The phytoplankton constitutes the main food of the zooplankton. Very little is known about the correlation between phytoplankton and zooplankton, but all investigations tend to show that the production of zooplankton reaches a peak in the same places as that of phytoplankton. During the plankton maximum in summer, when the food is temporarily superabundant, competition among the sea-birds must be inconsiderable. In spring and autumn, however, competition for food is very vigorous and has resulted in a pronounced specialization in the food requirement, to the effect that all available food units are utilized.
- Subjects
PHYTOPLANKTON; ZOOPLANKTON; BIRDS; NITRATES; FOOD; PLANKTON; AQUATIC biology
- Publication
Oikos, 1955, Vol 6, Issue 1, p92
- ISSN
0030-1299
- Publication type
Article
- DOI
10.2307/3564828