Estimating the Organic Carbon Content of Phytoplankton From Cell Volume or Plasma Volume1

Strathmann, Richard R.

doi:10.4319/lo.1967.12.3.0411

Cited by 1,232 publications

(619 citation statements)

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“…!lm-3) e; ciliados (0,14 pg. !lm-3) (Strathmann, 1967;Edlei;Putt & Stoecker, 1989). Amostras de plâncton total (50 ml) foram preservadas com formaldeído neutralizado (concentração final de 0,4%) para observação e enumeração de espécies mais fi"ágeis de dinoflagelados atecados e grupos numericamente abundantes do nanoplâncton em microscópio invertido (Hasle, 1978).…”

Section: Methodsunclassified

Comunidades microplanctônicas no Oceano Atlântico Sul Ocidental: biomassa e distribuição em novembro de 1992

Fernandes

Brandini

1999

Rev. Bras. Oceanogr.

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A distribuição quantitativa e a biomassa do microplâncton (1O-200J.lffi) foram investigadas ao longo de um transecto entre 8ão Paulo (25º30'8) e a Península Antártica (62º05'8) em novembro de 1992. Aumentos de biomassa fitoplanctônica ocorreram na Frente Polar (FP) e Zona de Confluência Brasil-Malvinas (ZCBM) (0,84-1,23J.1g Chl.a/l). A biomassa foi menor nas massas de água adjacentes, com valores médios semelhantes de clorofila-a para a Água 8ubtropical (0,27J.1g/1), onde ocorreu florescimento de Trichodesmium erythraeum, e Água de 8uperficie Antártica (O, 18J.1g11). A área central oceânica na Água 8ubantártica ao largo da plataforma patagônica (46º8-54º8) constituiu notável exceção, com florescimentos significativos do fitoplâncton (até 2,46J.1g Chl.a/1). As diatomáceas dominaram as áreas de crescimento intensivo nas duas fTentes, onde os valores de abundância e biomassa do fitoplâncton foram semelhantes, indicando que ambientes com características hidrográficas e biológicas distintas suportam florescimentos de mesma magnitude. Ao norte da ZCBM dominaram espécies com menor quantidade de sílica, refletindo concentrações menores deste nutriente naquelas águas. Em contrapartida, espécies com paredes celulares espessadas dominaram a comunidade durante o florescimento na FP. Estes representantes parecem ser recorrentes e com distribuição circumpolar na FP em diferentes longitudes. Ciliados e dinoflagelados dominaram na Água 8ubtropical e norte da Confluência, parecendo responder rapidamente às elevações de densidade do fitoplâncton. A Prymnesiophyceae Phaeocystis aft: globosa foi abundante em algumas estações.

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Section: Methodsunclassified

Comunidades microplanctônicas no Oceano Atlântico Sul Ocidental: biomassa e distribuição em novembro de 1992

Fernandes

Brandini

1999

Rev. Bras. Oceanogr.

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“…Phytoplankton biovolume was obtained as the product of cell abundance and the cell volume. Autotrophic carbon was calculated from biovolume estimates using the equations provided by Strathmann (1967).…”

Section: Methodsmentioning

confidence: 99%

Experimental induction of a large phytoplankton bloom in Antarctic coastal waters

Agustı́¹,

Duarte²

2000

Mar. Ecol. Prog. Ser.

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The experimental enclosure of an Antarctic planktonic community in a large (35 m 3 ) mesocosm moored in Johnson's Dock (62°39.576' S, 60°22.408' W, Livingston Island, Bransfield Sector, Antarctica) was followed by a large phytoplankton bloom. This bloom, dominated by the large diatom Thalassiosira antarctica, reached a biomass 1000-fold greater than in the ambient waters. The net growth rate of T. antarctica averaged 0.53 ± 0.17 d -1 , with maximum net growth rates close to 1.0 d -1 , exceeding the predicted maximal population growth rates by 60 to 200%. The gross primary production in the mesocosm (49 mmol C m -3 d -1 ) was about 30 times greater than the concurrent gross production in the ambient waters, while sedimentation losses removed only between 2.1 to 13% of the biomass d -1 and cell mortality was negligible. The bloom development led to a decline of dissolved inorganic nutrient concentrations to values several times lower than those in the ambient waters, indicating that the ambient nutrients were both available and sufficient to allow the development of the massive algal bloom observed. Light-limitation of the phytoplankton community was likely the factor responsible for the low biomass and production in ambient waters relative to the mesocosm, as indicated by: (1) limited water transparency of about 1 m, which increased up to 6 m as a result of the sedimentation of the glacial flour in the mesocosm; (2) dense pigment packaging (14.7 ± 3 pg chl a µm -3 ) inside the phytoplankton cells of the community in the ambient waters compared to much lower values (4.2 ± 0.8 pg chl a µm -3 ) in the mesocosm community; (3) a specific light absorption of the phytoplankton community in the ambient waters 10 times higher (average specific PAR absorption ± SE = 0.018 ± 0.0038 m -1 mg chl a -1 ) than in the mesocosm community (0.0087 ± 0.002 m -2 mg -1 chl a); and (4)

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“…Cell volumes for all taxa were determined by measuring the cellular dimensions of at least 10 cells on two dates. These estimates were converted to carbon based on either Strathmann (1967) equations for nano-and microplankton or on Laws et al (1984) conversion factor of 0.15 g C ml-l for picoplankton. Cell size for each taxon was back-calculated from cell volume estimates and expressed as equivalent spherical diameter (Fm).…”

Section: Methodsmentioning

confidence: 99%

Have we overlooked the importance of small phytoplankton in productive waters?

Carrick

Schelske

1997

Limnology & Oceanography

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The idea that phytoplankton size structure increases with elevated nutrient content in lakes may be inaccurate because phototrophic picoplankton (Ppico) abundance was not accounted for in studies that originally described this phenomenon. The biomass, composition, and production of an entire phytoplankton community was evaluated in hypereutrophic Lake Apopka, Florida (avg chlorophyll = 105 pg liter-', y1 = 20) for 1 yr. Ppico cell abundances commonly exceed 10' cells ml -I, and size-fractionated chlorophyll (<5 pm) and algal enumeration (cells <2 pm in size) indicate that pica-size cyanobacteria contribute significantly to phytoplankton biomass throughout the year (avg 30%, n = 15), even though clogging of small pore-sized filters used in chlorophyll fractionation studies led to underestimation of Ppico biomass estimates. Ppico production contributed nearly 30% (n = 8) to total phytoplankton production. The quantitative importance of Ppico in Lake Apopka and eight other hypereutrophic systems in Florida (avg 50% Chl <5 pm) indicates that Ppico can be important in waters of high nutrient content. The importance of small phytoplankton in productive waters may have been overlooked because (1) most studies focus on relatively pristine ecosystems, (2) some methodological constraints may impede studies in eutrophic environments (filtration artifacts), and (3) routine assessment of phytoplankton abundance rarely censuses all components of the community, including small algae.

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Estimating the Organic Carbon Content of Phytoplankton From Cell Volume or Plasma Volume1

Cited by 1,232 publications

References 3 publications

Comunidades microplanctônicas no Oceano Atlântico Sul Ocidental: biomassa e distribuição em novembro de 1992

Comunidades microplanctônicas no Oceano Atlântico Sul Ocidental: biomassa e distribuição em novembro de 1992

Experimental induction of a large phytoplankton bloom in Antarctic coastal waters

Have we overlooked the importance of small phytoplankton in productive waters?

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