Poluição das águas marítimas: estragos na flora e fauna do Rio de Janeiro

Oliveira, Lejeune P. H. de

doi:10.1590/s0074-02761958000100004

Cited by 9 publications

(3 citation statements)

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“…The bottom sediments are soft, ranging from sand in the outer sector to muddy in the intermediate and inner sectors; there is a strong influence of marine intrusion from the central channel (Mayr et al , 1989). Human impacts including river canalization and landfills, inputs of untreated domestic sewage and industrial residues, ship-source oil pollution, and urban wastes were related to the disappearance of some species, mainly echinoderms, and reduction in crab abundance (Oliveira, 1958). In general, sediments are toxic, with high levels of heavy metals, mainly wastes from industries and oil refineries, organic pollution, petroleum derivatives and pathogenic organisms (Pereira et al , 2007).…”

Section: Methodsmentioning

confidence: 99%

Factors influencing spatial patterns of molluscs in a eutrophic tropical bay

et al. 2012

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Samples were collected from 10 stations distributed through three sectors in Guanabara Bay during two consecutive years, in order to determine factors that influence the spatial pattern of molluscs and to describe the structure and composition of this community in a eutrophic estuarine system on the Brazilian coast. Although only one species, the gastropodHeleobia australis, comprised 77% of mollusc abundance, 59 species were identified in the bay. In addition toH. australis, three other species were dominant: the gastropodAnachis isabelleiand the bivalvesAmericuna besnardiandErvilia concentrica. The mollusc communities were significantly influenced by the spatial gradient; the outermost sector has marine conditions, and the other sectors are typically estuarine, leading to differences in the composition and abundance of molluscs. The outermost sector showed the highest diversity, which gradually decreased towards the innermost sector where the dominance of a few opportunistic species is favoured by highly organic mud sediments. Sediment type was strongly correlated with mollusc occurrence in the bay. Guanabara Bay showed two indicator species: the bivalveE. concentricaof the outer sector, and the gastropodH. australisof the intermediate sector. Our results suggest that benthic molluscs in Guanabara Bay show characteristics related to levels of environmental impact. A monitoring programme based on this community is needed to evaluate the effects of human impacts on this community and to monitor changes in its biodiversity in Guanabara Bay.

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Section: Methodsmentioning

confidence: 99%

Factors influencing spatial patterns of molluscs in a eutrophic tropical bay

et al. 2012

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“…Until recently, studies of macrozoobenthos conducted in Guanabara Bay have focused mainly on biotopes along its shorelines, such as beaches, mangrove forests and islands (OLIVEIRA, 1958;OLIVEIRA;KRAU, 1976;MACIEL, 1979;SILVA et al, 1980;VERGARA FILHO et al, 1997). Only one study has examined the spatial distribution and function of sublittoral macroinfauna throughout the bay (FLORES JR. et al, 1979).…”

Section: Introductionmentioning

confidence: 99%

Polychaete assemblage of an impacted estuary, Guanabara Bay, Rio de Janeiro, Brazil

Santi

Tavares

2009

Braz. j. oceanogr.

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(Avenida Nazaré, 481, São Paulo, SP, Brasil) mdst@usp.br A B S T R A C T Thirty-eight stations were sampled in Guanabara Bay, Rio de Janeiro, Brazil, to assess the spatio-temporal diversity and biomass of sublittoral polychaetes. Samples were collected during the dry (September 2000) and rainy season (May 2001) in shallow sublittoral sediments. The polychaete spatial composition showed a heterogeneous distribution throughout the bay. A negative gradient of diversity and biomass was observed towards the inner parts of the bay and sheltered areas. A wide azoic area was found inside the bay. Some high-biomass and low-diversity spots were found near a sewage-discharge point. In these areas, the polychaete biomass increased after the rainy season. A diversified polychaete community was identified around the bay mouth, with no dramatic changes of this pattern between the two sampling periods. Deposit-feeders were dominant in the entire study area. The relative importance of carnivores and omnivores increased towards the outer sector, at stations with coarse sediment fractions. Guanabara Bay can be divided into three main zones with respect to environmental conditions and polychaete diversity and biomass patterns: A) High polychaete diversity, hydrodynamically exposed areas composed of sandy, oxidized or moderately reduced sediments with normoxic conditions in the water column. B) Low diversity and high biomass of deposit and suspension-feeding polychaete species in the middle part of the bay near continental inflows, comprising stations sharing similar proportions of silt, clay and fine sands. C) Azoic area or an impoverished polychaete community in hydrodynamically low-energy areas of silt and clay with extremely reduced sediments, high total organic matter content and hypoxic conditions in the water column, located essentially from the mid-bay towards the north sector. High total organic matter content and hypoxic conditions combined with slow water renewal in the inner bay seemed to play a key role in the polychaete diversity and biomass. Sedimentation processes and organic load coming from untreated sewage into the bay may have negatively affected the survivorship of the fauna. R E S U M OTrinta e oito estações foram amostradas na Baía de Guanabara, Rio de Janeiro, Brasil, no intuito de descrever a diversidade e biomassa de poliquetas sublitorais. As coletas foram realizadas em dois períodos distintos do ano: seco (Setembro 2000) e chuvoso (Maio de 2001). A distribuição espacial dos poliquetas sublitorais demonstrou ser nitidamente heterogênea na Baía de Guanabara. Um gradiente negativo de diversidade e biomassa foi observado em direção as partes internas e protegidas da baía. Foi encontrada uma grande área azóica dentro da baía. Por outro lado, algumas áreas com alta biomassa e baixa diversidade foram encontradas nas proximidades de locais com despejo de esgoto urbano não tratado. Nestas áreas foi observado aumento da biomassa de poliquetas no período chuvoso. Uma comunidade diversificada foi identificada na...

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“…As A. heterochaelis has been the most commonly cited species in Brazil (e.g., Smith, 1871;Rathbun, 1900b;Moreira, 1901;Luederwaldt, 1919Luederwaldt, , 1929Oliveira, 1940Oliveira, , 1948Oliveira, , 1958Holthuis, 1956;Gerlach, 1958;Coelho, 1965Coelho, , 1966Coelho, , 1967aCoelho, , 1967bCoelho, , 1971Coelho, Koening & Ramos. 1970;Ramos 1971;Coelho & Ramos, 1972;Correa, 1972;Ramos-Porto, Ferreira-Correia & Souza, 1978), I began to reexamine some of the previous identifications under this name and to irarch for this species along the Brazilian coast.…”

Section: Introductionmentioning

confidence: 99%

The Western Atlantic Snapping Shrimps related to Alpheus Heterochaelis Say (Crustacea, Caridea), with the description of a new species

Christoffersen

1983

Pap. Avulsos Zool.

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Four closely related species of the Edwardsi group of Alpheus, living exclusively within estuarine environments, are recognized in the Western Atlantic region. A. heterochaelis Say was collected in North Carolina, Para and Paraiba, not having been found in southern Brazil. A. pontederiae Rochebrune, previously known only from West Africa, is recorded along the Brazilian coast between Para and Parana. A. estuariensis, sp. n., is common from Florida to Parana, while A. chacei Carvacho, with which A. maxilliplanus Christoffersen is synonymized, is known from Guadeloupe to Sao Paulo. A key for the recognition of these species, notes on their ecological distribution and remarks on their relationships with other species of Alpheus are provided.

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Poluição das águas marítimas: estragos na flora e fauna do Rio de Janeiro

Cited by 9 publications

References 0 publications

Factors influencing spatial patterns of molluscs in a eutrophic tropical bay

Factors influencing spatial patterns of molluscs in a eutrophic tropical bay

Polychaete assemblage of an impacted estuary, Guanabara Bay, Rio de Janeiro, Brazil

The Western Atlantic Snapping Shrimps related to Alpheus Heterochaelis Say (Crustacea, Caridea), with the description of a new species

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