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Quantification and classification of the main environmental impacts on a Halodule wrightii seagrass meadow on a tropical island in northeastern Brazil Anais da ABC (AABC)
Pitanga,Maria Elisa; Montes,Manuel J.F.; Magalhães,Karine M.; Reis,Thiago N.V..
Multiple stress mechanisms have caused a worldwide decrease in seagrasses, which are vulnerable to environmental and/or anthropogenic pressure. The loss of seagrass meadows of Halodule wrightii is reported for the littoral of Itamaracá Island (Northeastern Brazil). The present study identified the main anthropogenic factors that negatively influenced over the abundance and distribution of seagrass meadows between July and September 2007 at the Jaguaribe and Pilar Beaches, Eastern littoral of Itamaracá. Anthropogenic impact included the discharge of untreated sewage through fluvial channels, urban and commercial development along the coast, the anchoring of motorized and non-motorized boats, diverse fishing techniques and the dumping of solid waste. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation; Ecological value; Habitat loss; Marine habitat.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100005
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Halophila baillonis Ascherson: first population dynamics data for the Southern Hemisphere Anais da ABC (AABC)
Magalhães,Karine M.; Borges,João C.G.; Pitanga,Maria E..
The present paper presents the first population data for the Southern Hemisphere of the rare seagrass Halophila baillonis. The population studied is located in a calm, reef-protected area at depths ≤ 5 m, covering 12,000 m2 (400 m long by 30 m wide, oriented parallel to the coastline). The population generally demonstrated low shoot density and biomass during the rainy season, with significant differences between seasons, being found only for aboveground biomass. Despite the identification of this new population, the species continues to be considered rare along the Brazilian coast.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vulnerable species; New population; Seagrass; Shoot density.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200861
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