Los ostrácodos como indicadores ambientales: la laguna de Nador (NE de Marruecos)

• F. Ruiz ^[1] ; M. Abad ^[1] ; E.X.M. García ^[1] ; N. Hamoumi ^[2] ; M. Labraimi ^[2] ; E.H. Boumaggard ^[2] ; I. Bouamterhane ^[2]
  1. [1] Universidad de Huelva

     Universidad de Huelva

     Huelva, España

     
  2. [2] Centre Hospitalier Universitaire Mohammed VI

     Centre Hospitalier Universitaire Mohammed VI

     Marrakech-Medina, Marruecos

     
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 6, 2, 2004 (Ejemplar dedicado a: IV Congreso Geológico de España), págs. 307-310
• Idioma: español
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• Resumen

  • 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.