Reef Ecosystem
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Abundance of the reef-building Petaloconchus varians (Gastropoda: Vermetidae) on intertidal rocky shores at Ilha Grande Bay, southeastern Brazil
ABSTRACT The reef-building vermetid Petaloconchus varians occurs in the western Atlantic Ocean, from the Caribbean Sea to the southern coast of Brazil. The present study evaluated the abundance of P. varians on intertidal rocky shores in Ilha Grande Bay (Rio de Janeiro State), and characterized their reefs, describing the species density, besides the weight
An. Acad. Bras. Ciênc.. Publicado em: 2017-06
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2. Polyplacophora (Mollusca) from reef ecosystems and associations with macroalgae on the Coast of Alagoas, Northeastern Brazil
ABSTRACT Brazilian marine molluscs, especially Gastropoda and Bivalvia, are relatively well studied. However, information on the class Polyplacophora is more scarce, particularly on reef-dwelling forms. This study aimed to qualitatively and quantitatively analyze aspects of polyplacophorans from reef ecosystems and their associations with macroalgae on the c
Zoologia (Curitiba). Publicado em: 2015-08
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3. Produtividade fitoplactÃnica e hidrologia no ecossistema recifal de Porto de Galinhas (Pernambuco- Brasil)
The Porto de Galinhas beach, located in the south coast of Pernambuco, Brazil, about 50 kilometers from Recife, has coral reef formations that form natural pools of extreme beauty, and thus, actually is undergoing an intense tourist activity, as one of the most visited beaches of Northeastern Brazil. The phytoplankton productivity and biomass and some hydrol
Publicado em: 2009
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4. Ecologia trÃfica das anÃmonas-do-mar Anthopleura cascaia e Anthopleura krebsi (cnidaria: anthozoa) em duas praias de Pernambuco, Brasil
Studies of trophic ecology are fundamental to understanding the role that the species play in the ecosystem. Sea anemones are important components of reef environments, but few studies address the relationship anemone and its prey. So, it was developed a study on the species Anthopleura cascaia and Anthopleura krebsi on Piedade and Carneiros beach, in Pernam
Publicado em: 2009
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5. Caracterização dos sedimentos superficiais de fundo do complexo recifal de Maracajaú
The study carried out in the environment of Maracajaú reef an São Roque channel, had as main objective to analyze the characteristics of sediments active locally expressed in the grains, through collections of sediments in the field, technical processing and data analyzes of sediments. Data processing were made on three main aspects: biotic composition, co
Publicado em: 2008
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6. ReproduÃÃo, idade e crecimento da carÃna-azul Acanthurus coeruleus (Actinopterygii: Acanthuridae) em Pernambuco
Acanthurus coeruleus plays a very important role in the reef environment of the Tropical Atlantic Ocean because it is one of the main herbivorous forager in this ecosystem. In Pernambuco, its exploration has happened indiscriminately in the trap-fisheries, however, this species has not been much studied, which explains the lack of knowledge about most aspect
Publicado em: 2008
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7. Comunidade de CrustÃceos DecÃpodos InfralitorÃneos dos Recifes da Praia de Porto de Galinhas (PE)
Northeastern Brazilian coral reefs, as found in Porto de Galinhas beach â PE, are known as areas of complex and diverse biological interactions and high biological productivity (primary productivity). In addition, they represent a reproductive zone, and serve as nursery, shelter and alimentation source for a major part of the marine fauna. Porto de Galinhas
Publicado em: 2007
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8. DistribuiÃÃo espaÃo-temporal da meiofauna e da nematofauna no ecossistema recifal de Porto de Galinhas, Ipojuca, Pernambuco, Brasil
From all the beaches on Pernambuco coast âPorto de Galinhasâ is the one which receives the largest tourist flow. The aims of this research were to evaluate the meiofauna and nematofauna spatial and temporal distributions in tidal ponds as well as in the inner part of the reef ecosystem. To evaluate the vertical distribution of meiofauna and Nematoda genera
Publicado em: 2003
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9. Application of image of the satelite Landsat TMS and of vertical aÃrias photographs for the mapping of coastal reefs and analysis of the littoral physical processes related - TAMANDARÃ, PE, BRAZIL / AplicaÃÃo de imagem do satelite Landsat TMS e de fotografias aÃrias verticais para o mapeamento dos recifes costeiros e anÃlise dos processos fÃsicos litorÃneos relacionados - TAMANDARÃ, PE, BRASIL
The coastal area is one of the most complex and sensitive environments of nature, presenting great ecosystem diversity, coral reefs among them, and is widely recognized to be approaching a critical situation. The modern expressive urban occupation of coastal areas all over the world causes great pressure and marked alterations to these environments. The pres
Publicado em: 2003
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10. Predator diversity hotspots in the blue ocean
Concentrations of biodiversity, or hotspots, represent conservation priorities in terrestrial ecosystems but remain largely unexplored in marine habitats. In the open ocean, many large predators such as tunas, sharks, billfishes, and sea turtles are of current conservation concern because of their vulnerability to overfishing and ecosystem role. Here we
National Academy of Sciences.
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11. What was natural in the coastal oceans?
Humans transformed Western Atlantic coastal marine ecosystems before modern ecological investigations began. Paleoecological, archeological, and historical reconstructions demonstrate incredible losses of large vertebrates and oysters from the entire Atlantic coast. Untold millions of large fishes, sharks, sea turtles, and manatees were removed from the
The National Academy of Sciences.