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Patterns of invasion by the seaweeds Grateloupia turuturu Yamada and Sargassum muticum (Yendo) Fensholt under crossed combinations of the regime (mean intensity and temporal variability) of climate-related mechanical disturbance and constant nutrient enrichment were experimentally examined in rockpools in north Portugal. The cover of both species was larger under high compared to low intensity of...
We compared patterns of abundance and distribution of the sea urchin Paracentrotus lividus between shores subject to commercial harvesting of this species and unexploited reference shores in north Portugal. Harvesting was associated to a significant reduction in total density and abundance of individuals of commercially valuable size (i.e. larger than 40mm in test diameter), with patterns, respectively,...
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