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(Article of periodic en Anglais - 2012)

Document title

Recent foraminiferal assemblages from mixed carbonate-siliciclastic sediments of southern Somalia and eastern Kenya

Authors(s) and Affiliation(s)

PIGNATTI J. ;

Abstract

A total of 256 recent benthic foraminiferal species belonging to 111 genera is identified from 73 carbonate-siliciclastic sediment samples collected along the coast of southern Somalia (Burgao channel) and eastern Kenya (Lamu Archipelago). The sediment samples are representative of different environments (e.g., mangrove flats, tidal channels, restricted shelf, and open shelf), water depths (0-60 m), and salinities (strongly brackish to normal marine conditions). Q-mode Hierarchical Cluster Analysis reveals that 9 assemblages can be distinguished; for each assemblage, faunal composition and distribution, diversity indices and dominance are assessed. Salinity, suspended sediment, nutrient levels, and tidal exposure are the most influential factors in determining benthic foraminiferal distribution patterns. An interesting feature is the nearshore contraction of the depth gradient determining the shallower distribution of several larger foraminiferal species, as evidenced by the depth ranges of 5 species of Amphistegina. - (NF)

Source

Article of periodic

published at : Italian Journal of Geosciences / ISSN 2038-1719

Editor : Società Geologica Italiana, Roma - ITALIE (2009)

Millesime : 2012, vol. 131, no1 [pp. 47-65]

Bibliographic references : 67 ref.

Collation : 7 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 5205

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.3301/IJG.2011.22

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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