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Title: Influence of fishing and functional group of algae on sea urchin control of algal communities in the eastern Atlantic
Authors: Tuya, Fernando 
Sanchez-Jerez, Pablo
Haroun, Ricardo J. 
UNESCO Clasification: 241705 Biología marina
240119 Zoología marina
510208 Pesca
Keywords: Sea urchins
Diadema antillarum
Functional groups
Ecosystem-level effects, et al
Issue Date: 2005
Publisher: 0171-8630
Journal: Marine Ecology - Progress Series 
Abstract: We address the effect of several factors influencing the depth of interfaces between the shallow photophilic brown algal assemblages and Diadema antillarum urchin-dominated barrens on rocky reefs of the warm-temperate central-eastern Atlantic. By means of a multifactorial observational approach, we hypothesized that it would be locally influenced by (1) the functional structure of the dominant brown algal assemblages (corticated foliose algae versus large frondose coarsely-branched fucoid species), in addition to (2) the fishing status (fished versus unfished sites) and (3) the large-scale topography of the substrate. Our results show that brown algal assemblages reach deeper waters at unfished sites, which is independent of the dominant brown algal functional group. However, monospecific algal facies dominated by large frondose coarsely-branched fucoid species (mainly the genera Cystoseira) reach deeper waters in comparison with corticated foliose algae, at fished sites.
ISSN: 0171-8630
DOI: 10.3354/meps287255
Source: Marine Ecology Progress Series [ISSN 0171-8630], v. 287, p. 255-260
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