(Table 1) Quantitative analysis of mollusk taxa from surface sediment samples in the Golfe d'Arguin


Ecological and taxonomic study of the mollusk-rich fauna of the Golfe d'Arguin, North Mauritania, investigates the various environmental influences affecting this tropical shelf. The upwelling of nutrient-rich waters leads to a highly productive environment under tropical conditions. The resulting mixed carbonate-siliciclastic sediment contains a large portion of calcareous components produced by heterotrophic organisms--e.g., mollusks, foraminifers, worms, barnacles--that are reworked on the open shelf. On the basis of mollusk assemblages, six taphocoenoses are defined, all being characterized by a mixed fauna of tropical (e.g., Tellina densestriata), subtropical (e.g., Macoma cumana) and temperate (e.g., Spisula subtruncata) species. Differences between the assemblages are related to the medium--grain size ranging from mud to gravel--that results from local hydrodynamic conditions and water depth. Among carbonate grains, Donax burnupi shells are very abundant in the swell-exposed, northern part of the Golfe d'Arguin and reflect the tropical to subtropical, high-energy, and high-nutrient waters. Mollusk assemblages are demonstrated to be a sensitive tool for deciphering complex environmental conditions in sedimentary archives.

Supplement to: Michel, Julien; Westphal, Hildegard; von Cosel, Rudo (2011): The mollusk fauna of soft sediments from the tropical, upwelling-influenced shelf of Mauritania (Northwestern Africa). Palaios, 26(7-8), 447-460

DOI https://doi.org/10.1594/PANGAEA.747711
Related Identifier IsSupplementTo https://doi.org/10.2110/palo.2010.p10-148r
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.747711
Creator Michel, Julien; Westphal, Hildegard ORCID logo; von Cosel, Rudo
Publisher PANGAEA
Publication Year 2010
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 720 data points
Discipline Earth System Research
Spatial Coverage (-17.708W, 19.708S, -16.969E, 20.758N); off Mauritania
Temporal Coverage Begin 2007-01-01T12:55:00Z
Temporal Coverage End 2007-01-11T10:50:00Z