Los ostrácodos como indicadores ambientalesla 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 Departamento de Geodinámica y Paleontología, Universidad de Huelva
- 2 Faculté des Sciences, Université Mohammed VI, Rabat, Marruecos.
ISSN: 1576-5172
Año de publicación: 2004
Título del ejemplar: IV Congreso Geológico de España
Número: 6
Páginas: 307-310
Tipo: Artículo
Otras publicaciones en: Geotemas (Madrid)
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.