Journal cover Journal topic
Biogeosciences An interactive open-access journal of the European Geosciences Union
Journal topic
Preprints
https://doi.org/10.5194/bgd-7-6243-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bgd-7-6243-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  19 Aug 2010

19 Aug 2010

Review status
This preprint was under review for the journal BG but the revision was not accepted.

Assessing the ecological status of plankton in Anjos Bay: a flow cytometry approach

G. C. Pereira1, A. R. de Figuiredo1, P. M. Jabor2, and N. F. F. Ebecken1 G. C. Pereira et al.
  • 1Federal University of Rio de Janeiro – COPPE/UFRJ, Centro de Tecnologia, Cidade Universitária, Ilha do Fundão, Bloco B, Cx. Postal 68506 Rio de Janeiro, RJ, Brazil
  • 2Admiral Paulo Moreira Institute of Sea Studies – EAPM, Departamento de Oceanografia, rua Kioto 253, Cep.28430-000 Arraial do Cabo, RJ, Brazil

Abstract. This aim of this paper is to assess the use of the heterotrophic/autotrophic ratio as an early indicator of trophic status as a part of development of a real time monitoring program at Anjos Bay, Rio de Janeiro, Brazil. An in-situ flow cytometer was used to quantify the abundances of phytoplankton and cyanobacteria, which were identified by chlorophyll and phycoerythrin autofluorescence, respectively. Heterotrophic prokaryotes and viruses were quantified by DNA-binding fluorochromes; merozooplankton larvae were collected by plankton net and quantified by stereomicroscopy. The temporal and spatial distributions of these variables were evaluated on the basis of weekly observations from August 2006 to September 2007. The heterotrophic/autotrophic ratio and the viral abundance were correlated with upwelling events and assume an apparently seasonal pattern. A possible control mechanism and influential factors are discussed, and it is concluded that this ecosystem is bottom-up controlled under eutrophic conditions and top-down controlled under oligotrophic conditions.

G. C. Pereira et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

G. C. Pereira et al.

G. C. Pereira et al.

Viewed

Total article views: 876 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
482 352 42 876 42 31
  • HTML: 482
  • PDF: 352
  • XML: 42
  • Total: 876
  • BibTeX: 42
  • EndNote: 31
Views and downloads (calculated since 01 Feb 2013)
Cumulative views and downloads (calculated since 01 Feb 2013)

Cited

Saved

Discussed

No discussed metrics found.
Latest update: 11 Aug 2020
Publications Copernicus
Download
Citation