Abstract
During the past three decades, the Guanabara Bay suffered continuous degradation, leading to severe changes in the surrounding area and environmental damages. Besides significant loss of its natural landscape, the quality of its water decreased with continuous disposal of non-treated domestic organic sewage and industrial effluents. The present study aimed to survey the algal flora of Boa Viagem beach (Niteroi, RJ) and to compare it with information gathered three decades ago. Results showed a decrease of 30 taxa (49%) of the algal species and an increase of 14 species (23%) in comparison with algal flora recorded three decades ago. The actual algal flora is dominated by Ulva fasciata Delile and Enteromorpha compressa (L.) Nees, species indicative of organic pollution. These results elucidate the environmental impacts caused upon the macroalgae community of the Guanabara Bay during throughout the period.
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