Effect of crude oil and naphthalene on the evolution of oxygen by three species of marine algae

الملخص EN

The effect of different concentrations of crude oil and naphthalene on oxygen evolution by Ulva fenestrata Postels and Ruprecht, Sargassum crassifolia, J.

Ag., and Galaxaura fasciculata Kjellman, were studied.

Crude oil (200-800 ppb) and/or naphthalene (20-80 ppb) were introduced into pure cultures of the algae in a 4 2 factorial design.

After 5 hours, oxygen evolution of the three algae was greatly inhibited by crude oil and naphthalene, both singly and in combination, except in case of the lowest level of naphthalene treatment applied alone (20 ppb).

Addition of these two pollutants together increased their harmful effects on oxygen evolution.