Excreção de materia orgânica dissolvida por populações fitoplanctônicas da costa leste e sudeste do Brasil

Vieira, Armando Augusto Henriques; Teixeira, Camila Silveira Silva

doi:10.1590/s0373-55241981000100003

“…(1980) published the first information on the potential primary production of phytoplankton in the surface, using the C-14 technique of Steemann-Nielsen (1952) and analysis of chlorophyll-a. During the same period, Vieira & Teixeira (1981) completed the physiological studies by means of excretion of dissolved organic material, and Soares (1983) described the taxonomic structure and the distribution of the dominant phytoplankton groups. The diatoms were abundant in neritic stations and the more significant species were Ske/etonema costatum, Leptocy/indrus danicus, L. mediterranells, Tha/assionema nitzschioides, Bacteriastrom sp, 17!a/assiosira sp, Nitzschia spp and Chaetoceros spp, followed by Proboscia ( = Rhizoso/enia) a/ata, R. ca/caravis, R.robusta, Gllinardia f/accida, Guinardia striata ( = Rhizoso/enia sto/teifothii), Hemiau/lls membranaceus and H. hallckii.…”

Section: Studies In Shelf and Oceanic Areasmentioning

confidence: 99%

Microalgae of the continental shelf off Paraná State, southeastern Brazil: a review of studies

Brandini

¹

,

Fernandes

²

1996

Rev. Bras. Oceanogr.

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The paper reviews the taxonomic and ecological works on marine microalgae (phytoplankton and microphytobenthos) off Paraná State, Southeastern Brazil. Various studies refer to the taxonomy of benthic diatoms. Few descriptive field works in coastal and adjacent shelf waters contribute to the understanding of phytoplankton dynamics in coastal and shelf areas. Patterns of geographic distribution and changes in the phytoplankton community are described in relation to water masses and seasonal variations in the hydrographic regime. During summertime, when warm oligotrophic waters predominate over the shelf, the phytoplankton is nummerically dominated by small phytotlagellates, dinotlagellates, coccolithophorids and filaments of cyanobacteria. During wintertime, the abundance of micro-size diatoms over the shclf increase due to the dominance of cold nutrient-rich waters from the South Atlantic Central Water and wind-driven vertical circulation. The phytoplankton community off Paraná State may be classified into two categorics: the diatom-dominated coastal assemblage, mainly controlled by nutrient inputs from land drainage and ressuspension of bottom sediments, and the tlagellate-dominated shelf assemblage, more affectcd by the seasonality of local hydrographic regime.

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“…(1980) published the first information on the potential primary production of phytoplankton in the surface, using the C-14 technique of Steemann-Nielsen (1952) and analysis of chlorophyll-a. During the same period, Vieira & Teixeira (1981) completed the physiological studies by means of excretion of dissolved organic material, and Soares (1983) and February-March 1984(modifiedfrom Brandini,1990. .…”

Section: Studies In Shelf and Oceanic Areasmentioning

confidence: 99%

Microalgae of the continental shelf off Paraná State, southeastern Brazil: a review of studies

Brandini¹,

Fernandes²

1996

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The paper reviews the taxonomic and ecological works on marine microalgae (phytoplankton and microphytobenthos) off Paraná State, Southeastern Brazil. Various studies refer to the taxonomy of benthic diatoms. Few descriptive field works in coastal and adjacent shelfwaters contribute to the understanding of phytoplankton dynamics in coastal and shc1f areas. Patterns of geographic distribution and changes in the phytoplankton community are described in relation to water masses and seasonal variations in the hydrographic regime. During summertime, when warm oligotrophic waters predominate over the shc1f, the phytoplankton is nummerically dominated by small phytoflagellates, dinoflagellates, coccolithophorids and filaments of cyanobacteria. During wintertime, the abundance of micro-size diatoms over the she1fincrease due to the dominance of cold nutrient-rich waters from the South Atlantic Central Water and wind-driven vertical circulation. The phytoplankton community off Paraná State may be classified into two categorics: the diatom-dominated coastal assemblage, mainly controlled by nutrient inputs from land drainage and ressuspension of bottom sediments, and the flageIlate-dominated shelf assemblage, more affected by the seasonality of local hydrographic regime.. Resumo: O trabalho é uma revisão dos estudos taxonômicos e ecológicos das microalgas (planctônicas e bentônicas) realizados no Estado do Paraná. A maioria dos trabalhos sobre microfitobentos são de caráter taxonômico e, basicamente, referem-se à diatomáceas bênticas sobre macroalgas ou fundos lodosos e consolidados. Poucos trabalhos contribuiram para o estudo da dinâmica espaço-temporal do fitoplâncton em áreas costeiras e de plataforma. São descritos os padrões de distribuição geográfica e as mudanças sazonais na comunidade fitoplanctônica em relação ao regime hidrográfico. No verão, quando águas quentes oligotróficas predominam na superfície, o fitoplâncton é numericamente dominado por nanoflagelados, dinoflagelados, cocolitoforídeos e cianobactérias filamentosas. No inverno, as diatomáceas do microplâncton são em geral mais abundantes devido ao domínio de águas frias ricas em nutrientes. A comunidade fitoplanctônica da plataforma paranaense pode ser classificada em duas categorias: as associações costeira, sujeitas ao aporte de nutrientes pela drenagem continental e ressuspensão do sedimento, e a comunidade da plataforma afastada da costa, mais afetada pela sasonalidade do regime hidrográfico.

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“…cit.). Vieira & Teixeira (1981) reported photosynthetic and excretion rates of phytoplankton on a water volume basis for the eastern Brazil during summer (January) and winter (June) of 1978. According to these authors, 2 to 30% of the carbon assimilated by the phytoplankton is lost through excretion.…”

Section: ) Photosynthesismentioning

confidence: 99%

“…1980a Soares, 1983;Brandini, 1986Brandini, , 1988Brandini & Noraes, 1986). However very little information has been reported about photosynthetic activity in offshore areas (Vieira & Teixeira, 1981).…”

Section: Introductionmentioning

confidence: 99%

Hydrography, phytoplankton biomass and photosynthesis in shelf and oceanic waters off southeastern Brazil during autumn (may/june, 1983)

Brandini

¹

1988

Bol. Inst. Oceanogr.

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Excreção de materia orgânica dissolvida por populações fitoplanctônicas da costa leste e sudeste do Brasil

Cited by 10 publications

References 40 publications

Microalgae of the continental shelf off Paraná State, southeastern Brazil: a review of studies

Microalgae of the continental shelf off Paraná State, southeastern Brazil: a review of studies

Microalgae of the continental shelf off Paraná State, southeastern Brazil: a review of studies

Hydrography, phytoplankton biomass and photosynthesis in shelf and oceanic waters off southeastern Brazil during autumn (may/june, 1983)

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