Environmental conditions of pilón de azúcar beach (guajira, colombia), inferedfrom the foraminifers population of a sediment simple

Foraminifers are organisms, which due to their specific environmental requirements, are used as bio-indicators of marine environments. In this study we evaluated a sample of sediment from the “Pilón de Azúcar” beach (Guajira, Colombia), in order to deduce the physico-chemical conditions of such coastal environment, based on the group of 14 foraminifers found in it. We detect one hundred individuals belonging to 29 species,19 genus, 14 families, 8 super families, and 3 suborders: Rotaliina, Miliolina, Textularina. The more represented species were: Ammonia beccari, sobrina form; Discorbis rosea, Quinqueloculina sp., Amphistegina sp. and Cibicides antilleanus. In relation with the nature of the shell, 69 individuals had calcareohialine, 27 calcareous porcelained and 4 individual shad agglutinated shells. This variety of forms indicate that the predominant organisms found, are exposed to high concentrations of calcium carbonate, normal salinity and a pH not too low for the formation of their shells. 98% of the registered organisms belong to benthonic environments of the continental marine platform or from the transition zone, that generally inhabit in bioclastic sediments. The presence of fossil foraminifers (7%), indicated that there was an active erosive process in the coast that interferes with the accumulation of organic matter. In conclusion, this beach has a diverse and dynamic environment with the normal conditions of open Caribbean marine environment.

• Autores: Ortiz Moreno, Martha Lucía; Acosta, Nelly
• Tipo de recurso: Article of journal
• Fecha de publicación: 2003
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/38712
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/38712; http://bdigital.unal.edu.co/28809/
• Palabra clave: Ciencias Bilógicas; Biología; Medicina; Foraminíferos; Guajira; Colombia; Condiciones Fisicoquímicas; Composición Faunística; Ciencias Bilógicas; Biología; Medicina; Foraminifers; Guajira; Colombia; Fauna Composition; Physico-Chemical Conditions
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional