Nitrogen and phosphorus forms in water and the food requirements of algae. [Translation from: Wiadomosci Ekologiczne 19 238-244, 1973. ]

When dissolved in water, compounds of nitrogen and phosphorus ought to contain the basic assimilated food requirements for autotrophic plants and therefore autotrophic algae. This article summarises the occurrence of nitrogen in water, how species of algae utilize nitrogen and phosphorus forms for growth and the capacities of algae to adapt to environments of different nutrient wealth. This topic has unquestionable importance not only for the purpose of survival of a species but also in deciding indirectly about the stability of ecosystems.

New ground rope for 238 ton stern trawlers

The sea bottom of the Wadge and Pedro Banks are covered with hard corals and rocks, which cause frequent damages to the net and sometimes total loss of the gear (Hamuro, 1966). This has been one of the main reasons why trawling had been restricted to a small area of the Wadge Bank until recent years.