Algae Bloom in Algarve Beaches
A significant algae concentration has been observed at various beaches in the Algarve, but officials assure that this is a normal and recurring situation that does not compromise water quality. According to a source from the Agência Portuguesa do Ambiente (APA), this phenomenon is becoming increasingly common due to climate change, prevailing winds, and warming sea temperatures, yet it poses no danger to bathers.
The accumulation of algae has been particularly noticeable in rocky beaches around the western Algarve, including Praia de Olhos d'Água, Lagoa, Portimão, and Lagos. The algae consist of both native and some invasive species, which do not affect public health or water quality. However, their presence can cause discomfort for beachgoers.
The APA monitors this situation closely, conducting daily analyses of water quality and reporting no contamination linked to the algae thus far. José Carlos Rolo, the mayor of Albufeira, noted that these marine organisms frequently appear during periods of eastern winds and that the municipality actively removes them to prevent unpleasant odors resulting from their drying.
Despite these efforts, Rolo mentioned that it can be a thankless task, as algae may reappear quickly after removal. He emphasized that the natural processes of the sea, including tidal movements, typically manage the situation, and decomposition on the beaches is a natural occurrence without public health impacts.
The APA also highlighted that brown and red algae are more common in the western Algarve, while green algae are predominant in the eastern regions.
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