Contribuição ao estudo das correntes de superfície diante da costa leste brasileira (18º30'S - 20º00'S até 38º40'W)

Luedemann, Ellen F.

doi:10.1590/s0373-55241975000100005

Cited by 7 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Guanabara Bay, Rio de Janeiro, southeastern Brazil (22°41' -23°56' S and 43°02' -43°18'W), has been elassified as a coastal estuary with shallow and partially mixed waters. (LUEDEMANN 1975). On account of these observations, and annual similarity with record performed by ROCHA (1985) , it is suggested that P. schmackeri could be a common marine cladoceran species living in Brazilian coastal waters, and its may be recorded in neritic environments in winter, by influence of the Brazil Current displacement.…”

supporting

confidence: 55%

Scientific Communication

Aleixandre-Benavent¹

1998

LaboratoriumsMedizin

View full text Add to dashboard Cite

A frrst record of Pleopis schmackeri (Poppe, 1889) (Branchiopoda, Onychopoda) in the Guanabara Bay, Rio de Janeiro, Brazil is described. This marine cladoceran species occurred in zooplanktonic samples obtained on June 26, 2000, with densities =: 4.0 ind.m-3 Its presence may be related with inflow of coastal waters to the bay. KEY WORDS. Cladocera, Pleopis schmackeri, zooplankton, Guanabara Bay, BrazilCladocerans are small crustaceans that mainly inhabit fresh water, with only eight truly marine species (ONBÉ 1999). As compared with the rest of eladoceran species, the ecological characteristics of Pleopis schmackeri (Poppe, 1889) are

show abstract

supporting

confidence: 55%

Scientific Communication

Aleixandre-Benavent¹

1998

LaboratoriumsMedizin

View full text Add to dashboard Cite

show abstract

“…E-mail: marazzo@biologia.ufrj.br oceanic waters was observed carrying several zooplanktonic species common in open ocean waters. It occurred probably due to approximation of the Brazil Current to the coast, as it is usual in the winter period (LUEDEMANN 1975). On account of these observations, and annual similarity with record performed by ROCHA (1985) , it is suggested that P. schmackeri could be a common marine cladoceran species living in Brazilian coastal waters, and its may be recorded in neritic environments in winter, by influence of the Brazil Current displacement.…”

supporting

confidence: 55%

Record of Pleopis schmackeri (Poppe) (Branchiopoda, Onychopoda) in the Guanabara Bay, Rio de Janeiro, Brazil

Marazzo

2002

Rev. Bras. Zool.

View full text Add to dashboard Cite

ABSTRACT. A frrst record of Pleopis schmackeri (Poppe, 1889) (Branchiopoda, Onychopoda) in the Guanabara Bay, Rio de Janeiro, Brazil is described. This marine cladoceran species occurred in zooplanktonic samples obtained on June 26, 2000, with densities =: 4.0 ind.m-3 Its presence may be related with inflow of coastal waters to the bay. KEY WORDS. Cladocera, Pleopis schmackeri, zooplankton, Guanabara Bay, Brazil Cladocerans are small crustaceans that mainly inhabit fresh water, with only eight truly marine species (ONBÉ 1999). As compared with the rest of eladoceran species, the ecological characteristics of Pleopis schmackeri (Poppe, 1889) are unknown. This is probably due to its very rare presence and low abundance in temperate and tropical waters . Its occurrence has been described mainly in waters from the South China Sea through northern Honshu (Japan); and sporadic records from the Agaba Bay (Red Sea) and Madagascar (lndian Ocean). According to these reports, P. schmackeri may be considered warm water, coastal and oceanic species.ln Brazilian waters, a single record was made by ROCHA (1985) in the coastal waters of São Paulo (24°27'S-47°05 ' W), on 24 th June 1983.The presence of P. schmackeri in the Guanabara Bay is an unexpected fact, because this eladoceran species had never been recorded before in spite of intense investigations in previous decades . This fact suggests that P. schmackeri does not participate in the zooplanktonic community of this bay. Guanabara Bay, Rio de Janeiro, southeastern Brazil (22°41' -23°56' S and 43°02' -43°18'W), has been elassified as a coastal estuary with shallow and partially mixed waters.The occurrence of P. schmackeri was observed during research about the dynamics of planktonic communities of the Guanabara Bay. The zooplanktonic samples were obtained in surface water, at a fixed station on the entrance of the bay. ln a time series of sampling (from February 2 to August 1, 2000 with 3-4 day intervals), P. schmackeri was detected only in the triplicate samples taken on June 26, with mean densities == 4.0 ind.m-3 . Water temperature and salinity were 21 .6°C and 35.2 respectively. Population was composing by parthenogenetic females only. Mean body length and fecundity of individuaIs were 420 Ilm and five embryos.female-1 respectively . On that day, a strong intrusion of clearer and more saline

show abstract

“…Periodic advances of air masses of polar origin change this pattern during the austral winter. Southeasterly waves then lead to a minor NE-directed transport (Luedemann 1975;Dominguez and Barbosa 1994). For mangrove settings with small outlets it could mean that its carbon is retained inside the mangroves.…”

Section: Accumulationmentioning

confidence: 99%

Relevance of mangroves for the production and deposition of organic matter along tropical continental margins

Jennerjahn

Ittekkot

2002

Naturwissenschaften

404

213

View full text Add to dashboard Cite

Mangroves are highly complex ecosystems occupying a major part of tropical coastlines. High primary productivity, efficient biological nutrient recyling and a permanent exchange with terrestrial and marine ecosystems are their common features. Despite the high production and export rates of leaf litter, mangrove detritus has been reported to be of minor importance in sustaining marine food webs. The geographical distribution of mangrove-derived organic matter (OM) in marine sediments is found to be restricted to the vicinity of its source. Dissolved nutrient inputs from mangroves and rivers may fuel the production of marine OM. In this paper we assess the relevance of mangroves for the production and sedimentation of OM in the tropical coastal ocean based on data available from the literature and our own research results. We estimate the rates of carbon accumulation in mangrove sediments and of carbon export to the coastal seas. From the rates of litter fall and export we calculate carbon accumulating in mangrove sediments to be in the order of 23x10(12) g C per year and mangrove carbon introduced into the coastal ocean to be in the order of 46x10(12) g C per year. They account for about 11% of the total input of terrestrial carbon into the ocean and 15% of the total carbon accumulating in modern marine sediments.

show abstract

Contribuição ao estudo das correntes de superfície diante da costa leste brasileira (18º30'S - 20º00'S até 38º40'W)

Cited by 7 publications

References 2 publications

Scientific Communication

Scientific Communication

Record of Pleopis schmackeri (Poppe) (Branchiopoda, Onychopoda) in the Guanabara Bay, Rio de Janeiro, Brazil

Relevance of mangroves for the production and deposition of organic matter along tropical continental margins

Contact Info

Product

Resources

About