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Sessile ciliates on artificial substrata submerged in a polluted estuary (Santos, SP, Brazil)

Abstract

Primary growth was analysed on artificial substrata submerged at three sites of the Santos estuary (State of São Paulo, Brazil). Research on sessile ciliates was emphasized because they were the most conspicuous organisms of the primary growth developed along this estuary. Zoothamnium commune, dominated near the headwaters of the estuary, where the greatest amount of suspended matter in the water was found. Ephelota gemmipara dominated downstream. Although short time variability was observed in the colonization of substrata submerged on subsequent days, seasonal patterns could be determined. These patterns were characterized by a greater number of rare species of sessile ciliates, and a higher density of the most frequent ones, during spring and summer.

Periphyton; Artificial substrata; Estuaries; Pollution; Sessile ciliates; Ciliata; Santos; Southern Brazilian coast; Santos


ARTIGOS

Sessile ciliates on artificial substrata submerged in a polluted estuary (Santos, SP, Brazil)

Verena Rapp de Eston

Instituto Oceanográfico da Universidade de São Paulo

SYNOPSIS

Primary growth was analysed on artificial substrata submerged at three sites of the Santos estuary (State of São Paulo, Brazil). Research on sessile ciliates was emphasized because they were the most conspicuous organisms of the primary growth developed along this estuary. Zoothamnium commune, dominated near the headwaters of the estuary, where the greatest amount of suspended matter in the water was found. Ephelota gemmipara dominated downstream. Although short time variability was observed in the colonization of substrata submerged on subsequent days, seasonal patterns could be determined. These patterns were characterized by a greater number of rare species of sessile ciliates, and a higher density of the most frequent ones, during spring and summer.

Descriptors: Periphyton, Artificial substrata, Estuaries, Pollution, Sessile ciliates, Ciliata, Santos-SP, Southern Brazilian coast.

Descritores: Perifiton, Substratos artificiais, Estuários, Poluição, Ciliados sésseis, Ciliata, Santos-SP, Costa sul-Brasil.

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

Acknowledgements

This paper is based on a thesis submitted in partial fulfilment of the requirements for the Degree of Master in Biological Oceanography at the "Instituto Oceanográfico" of the University of São Paulo. I wish to acknowledge Luiz A. Zavala-Camin who provided laboratory space and facilities in Santos at the "Divisão de Pesca Maritima" of the "Instituto de Pesca da Secretaria da Agricultura do Estado de São Paulo" as well as the Fire-Brigade of Santos, for boat facilities. This research was possible thanks to FAPESP (Proc. nº 1118/77) and CAPES fellowships.

(Received 03-Jul-1984; accepted 07-May-1985)

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Publication Dates

  • Publication in this collection
    01 June 2012
  • Date of issue
    1985

History

  • Accepted
    07 May 1985
  • Received
    03 July 1984
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