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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/15893

Title: Coastal urbanization leads to remarkable seaweed species loss and community shifts along the SW Atlantic
Other Titles: Marine Pollution Bulletin
Authors: Scherner, Fernando
Horta, Paulo Antunes
Oliveira, Eurico Cabral de
Simonassi, José Carlos
Hall Spencer, Jason M.
Chow, Fungyi
Nunes, José Marcos de Castro
Pereira, Sônia Maria Barreto
Keywords: Phycogeographycal regions;South-West Atlantic;Marine biodiversity loss;Urbanization metrics;Macroalgae;Calcareous algae
Issue Date: 2013
Abstract: Coastal urbanization is rapidly expanding worldwide while its impacts on seaweed communities remain poorly understood. We assessed the impact of urbanization along an extensive latitudinal gradient encompassing three phycogeographical regions in the SW Atlantic. Human population density, number of dwellings, and terrestrial vegetation cover were determined for each survey area and correlated with diversity indices calculated from seaweed percent cover data. Urban areas had significantly lower calcareous algal cover (−38%), and there was significantly less carbonate in the sediment off urban areas than off reference areas. Seaweed richness averaged 26% less in urban areas than in areas with higher vegetation cover. We observed a remarkable decline in Phaeophyceae and a substantial increase of Chlorophyta in urban areas across a wide latitudinal gradient. Our data show that coastal urbanization is causing substantial loss of seaweed biodiversity in the SW Atlantic, and is considerably changing seaweed assemblages.
Description: Texto completo: acesso restrito. p. 106–115
URI: http://repositorio.ufba.br/ri/handle/ri/15893
ISSN: 0025-326X
Appears in Collections:Artigos Publicados em Periódicos (Biologia)

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