Los ostrácodos como indicadores ambientalesla laguna de Nador (NE de Marruecos)

  1. F. Ruiz 1
  2. M. Abad 1
  3. E.X.M. García 1
  4. N. Hamoumi 2
  5. M. Labraimi 2
  6. E.H. Boumaggard 2
  7. I. Bouamterhane 2
  1. 1 Departamento de Geodinámica y Paleontología, Universidad de Huelva
  2. 2 Faculté des Sciences, Université Mohammed VI, Rabat, Marruecos.
Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2004

Issue Title: IV Congreso Geológico de España

Issue: 6

Pages: 307-310

Type: Article

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Abstract

The analysis of the ostracod faunes collected in two seasonal campaigns carried out In the Nador lagoon (NE Morocco) permits to delimitate four main assemblages: a) Marine, composed by Pontocythere turbida, Urocythereis oblonga or Semicytherura spp and localized near the artificial mouth; b) Inner lagoon, present near the lagoon internal margin with scarce tidal renewal and characterized by high percentages of Loxoconcha rhomboidea and Palmoconcha turbida; c) Phytal, including species (Propontocypris, Xestoleberis) closely related to dense bottom vegetation (Caulerpa); and d) Confined, observed in the southwestern and northeaster regions, being nearly monospecific (Cyprideis torosa) . Stress conditions (pollution, industrial and/or agricultural inputs, high hydrodynamic levels, urban effluents) cause the disappearance of these microcrustaceans or the scarce apparition of reworked instars.

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