Living, dead and fossil benthic foraminifera on a river dominated shelf (northern Gulf of Cadiz) and their use for paleoenvironmental reconstruction.

Mendes, I., Dias, J. A., Schönfeld, Joachim, Ferreira, Ó., Rosa, F. and Lobo, F. J. (2013) Living, dead and fossil benthic foraminifera on a river dominated shelf (northern Gulf of Cadiz) and their use for paleoenvironmental reconstruction. Continental Shelf Research, 68 . pp. 91-111. DOI 10.1016/j.csr.2013.08.013.

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Abstract

Same-area comparison between patterns of Recent (living) and Holocene benthic
foraminiferal
assemblage composition is essential to validate their utility as proxies for paleoenvironmental
reconstructions. Such reconstructions have scarcely been attempted in shelf environments. In this
study, we compared living (stained), dead and Holocene benthic foraminiferal assemblages from the
Gulf of Cadiz continental shelf off the Guadiana River. On average, 99% of the living benthic
foraminiferal species were preserved in the dead assemblage and 95% in the fossil record.
Several common species were assessed as indicators for certain environmental factors, including
river discharge, supply of terrestrial organic matter, heavy metal concentrations, oxygen levels,
substrate properties, hydrodynamic energy levels, sea-level rise and human impact. The
paleoenvironmental reconstruction depicted five stages of Holocene environmental evolution of the
Guadiana shelf over the last 11,500 cal yr BP. The characteristics of the stages, and the
transitions between them, were in particular driven by changes in sea-level, influx
of terrestrial organic matter and limits of productivity.

Document Type: Article
Additional Information: WOS:000327169700009
Keywords: Gulf of Cadiz; Continental shelf; Guadiana River; Holocene; Benthic foraminifera; Paleoenvironmental reconstruction
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.csr.2013.08.013
ISSN: 0278-4343
Projects: CRIDA, IMCA, CIRCO, Future Ocean
Date Deposited: 22 Oct 2013 09:20
Last Modified: 21 Sep 2016 08:36
URI: http://oceanrep.geomar.de/id/eprint/22188

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