An experimentally determined carbon : volume ratio for marine “oligotrichous” ciliates from estuarine and coastal waters

Putt, Mary; Stoecker, Diane K.

doi:10.4319/lo.1989.34.6.1097

Cited by 975 publications

(540 citation statements)

References 20 publications

Supporting

Mentioning

524

Contrasting

Unclassified

Order By: Relevance

“…!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.

View full text Add to dashboard Cite

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.

show abstract

Section: Methodsunclassified

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

Fernandes

Brandini

1999

Rev. Bras. Oceanogr.

View full text Add to dashboard Cite

show abstract

“…For each sample, cell dimensions of 50-100 protists were measured using the image analysis software described above. Ciliate cell volumes were calculated using the equation for ellipsoids and converted to carbon content according to the formula of Putt and Stoecker [25]:…”

Section: Determination Of Abundance and Cell Volumementioning

confidence: 99%

Size Selective Feeding in Cyclidium glaucoma (Ciliophora, Scuticociliatida) and Its Effects on Bacterial Community Structure: A Study from a Continuous Cultivation System

et al. 2001

View full text Add to dashboard Cite

A B S T R A C TThree aspects of size selective feeding by the scuticociliate Cyclidium glaucoma were studied in continuous cultivation systems. Firstly, grazing-induced changes in abundance, biomass, and size structure of a bacterial community were investigated. Secondly, we studied possible grazingprotection mechanisms of bacteria as a response to permanent presence of the predator. And finally, we were looking for potential feedback mechanisms within this predator-prey relationship, i.e., how the ciliate population reacted to a changed, more grazing-protected bacterial community. The first stage of the cultivation system consisted of the alga Cryptomonas sp. and the accompanying mixed bacterial community. These organisms were transferred to two second stage vessels, a control stage without ciliates and a second one inoculated with C. glaucoma. After the first week, the abundance of bacteria in the latter decreased by 60% and remained stable until the end of the experiment (65 d), whereas bacterial biomass was less affected (393 µg C L −1 during days 0-7, 281 µg C L −1 afterwards). The mean bacterial cell volume doubled from 0.089 µm 3 to 0.167 µm 3 , which was mainly due to increasing cell widths. During the whole investigation period formation of colonies or filaments was not observed, but we found a clear feedback of ciliates on bacterial size. An increase in bacterial cell volume was always followed by a decline of the predator population, resulting in a yet undescribed type of microbial predator-prey relation. Literature and our own data on the optimal food size range grazed by C. glaucoma showed that bacterial cell width rather than length was responsible for that observed phenomenon. Finally, we suggest that uptake rates of spherical latex beads give only limited information on truly ingestible prey volumes and that prey geometry should be considered in future studies on size selective feeding of protists.

show abstract

“…Non-diatom phytoplankton and ciliates (preserved with 1% acid Lugols iodine) were counted in settling chambers under a Wild phase-contrast inverted microscope (125-500×). Bacterial, picoplanktonic algal, and protozan biovolumes were converted to carbon, based on studies of Norland (1993), Montagnes et al (1994), and Putt and Stoecker (1989), respectively.…”

Section: Analyticalmentioning

confidence: 99%

Particle Transport, Nutrient Cycling, and Algal Community Structure Associated with a Major Winter-Spring Sediment Resuspension Event in Southern Lake Michigan

Eadie¹,

Schwab²,

Johengen³

et al. 2002

Journal of Great Lakes Research

View full text Add to dashboard Cite

show abstract

An experimentally determined carbon : volume ratio for marine “oligotrichous” ciliates from estuarine and coastal waters

Cited by 975 publications

References 20 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

Size Selective Feeding in Cyclidium glaucoma (Ciliophora, Scuticociliatida) and Its Effects on Bacterial Community Structure: A Study from a Continuous Cultivation System

Particle Transport, Nutrient Cycling, and Algal Community Structure Associated with a Major Winter-Spring Sediment Resuspension Event in Southern Lake Michigan

Contact Info

Product

Resources

About