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Browsing by Author "Rodríguez Vidal, Joaquín"

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  • El contraste micropaleontológico de la Historia: el Lacus Ligustinus romano
    Publication . Guerra, Liliana; C. Veiga-Pires, C.; González-Regalado, María Luz; Abad, Manuel; Toscano, Antonio; Muñoz, Juan Manuel; Ruiz, Francisco; Rodríguez Vidal, Joaquín; Cáceres, Luis Miguel; Izquierdo, Tatiana; Carretero, María Isabel; Pozo, Manuel; Monge, Guadalupe; Tosquella, Josep; Gómez, Paula; Romero, Verónica; Arroyo, Marta; Gómez, Gabrlel
    During the Roman period (3rd century BC-5th century AD), the areas located near the present-day mouth of the Guadalquivir River were occupied by a lagoon with marine connection, according to the paleoenvironmental interpretation of benthic foraminiferal assemblages obtained in a core extracted in the Donana National Park. The inner zones of this lagoon were occupied by clayey tidal flats, which suffered the effects of a storm towards the end of the 1st century A.D. The comparison with the ostracod assemblages of the same core confirms this reconstruction and the paleogeographic data provided by various chroniclers, although these microcrustaceans better record the paleoenvironmental changes in these coastal sectors.
    2020Journal article Open access Show more
  • Relationship between substrate, physico-chemical parameters and foraminiferal tests in the Doñana National Park, a Biosphere Reserve in SW Spain
    Publication . Guerra, Liliana; C. Veiga-Pires, C.; González Regalado, María Luz; Abad, Manuel; Toscano, Antonio; Muñoz, Juan Manuel; Ruiz, Francisco; Rodríguez Vidal, Joaquín; Cáceres, Luis Miguel; Izquierdo, Tatiana; Carretero, María Isabel; Pozo, Manuel; Monge, Guadalupe; Tosquella, Josep; Prudencio, María Isabel; Dias, María Isabel; Marques, Rosa; Gómez, Paula; Romero, Verónica
    A multidisciplinar analysis of sediments collected in diferent environments of the Doñana National Park (Guadalquivir estuary, SW Spain) provides an overview of the textural, mineralogical and physico-chemical parameters that control the distribution of benthic foraminiferal tests in this Biosphere Reserve. These microorganisms are absent in the fne quartzitic sands that constitute the substrate of temporary ponds with brief hydroperiods located in the dune systems and spits, as well as in other ponds with low conductivities or hypersaline conditions located in the inner marshlands or near the Guadalquivir river banks. Dead benthic foraminifera are mainly found on phyllosilicate-rich, silty-clayey substrates. The taphonomic analysis of the main species (Ammonia tepida, Haynesina germanica, Trochammina infata, Entzia macrescens) points to its deposit in situ. Cluster analysis permits to delimitate six foraminiferal assemblages. Cluster II (A. tepida+H. germanica) is the dominant assemblage in the central ponds and the margins of the main channels, while cluster IV (T. infata+E. macrescens) is restricted to some ponds located on the high marsh and cluster VI (Ammonia beccarii+Quinqueloculina spp.) is abundant on external beaches. Tidal fuxes cause the transport of these last marine benthic species and some plaktonic forms both to the inner areas of the estuary and to these beaches.
    2019Journal article Restricted access Show more