Benthic foraminifera analysis in two cores from the northeastern area of Guanabara Bay

Authors

  • Raquel Batista Medeiros da Fonseca UFRJ; CCMN; Instituto de Geociências; Departamento de Geologia
  • Kelly Cristine Costa de Abreu UFRJ; CCMN; Instituto de Geociências; Departamento de Geologia
  • Claudia Gutterres Vilela UFRJ; CCMN; Instituto de Geociências; Departamento de Geologia
  • José Antônio Baptista Neto UFF; LAGEMAR

DOI:

https://doi.org/10.11137/2007_1_27-29

Abstract

Guanabara bay receives a large amount of industrial and domestic sewage, which contributes for its environmental degradation. For monitoring those environmental changes, two cores from the northeastern area of the bay were analized. They were subsampled in centimeter intervals and the laboratory treatment followed specific methodology for foraminifera. Foraminifera are much sensitive microorganisms as to environmental changes as to anthropogenic ones, thus they are useful as pollution indicators. The results show low values of diversity, however, a higher diversity in the core T15, between Paquetá island and São Gonçalo than in the core T14, at São Gonçalo south region. Both of them presented Ammonia tepida as a dominant species human pollution bioindicator, and Buliminella elegatissima as bioindicator of high levels of organic matter.

Published

2007-01-01

Issue

Section

Article