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Title: Recent benthic foraminifera from off the coast of Arkattuthurai (near Nagapattinam), south east coast of India
Authors: Elakkiya, P.
Manivannan, V.
Keywords: Foraminifera;Sedimentological parameters;Ecology;Arkattuthurai
Issue Date: Nov-2013
Publisher: NISCAIR-CSIR, India
Abstract: Sediment samples were collected from 12 stations ranging in depth from <1 m to 6m for the study of foraminiferal fauna. In the present study, 41 foraminiferal species belonging to 22 genera have been identified. It consists 4 arenaceous agglutinated, 16 calcareous porcelaneous and the rest 21 calcareous perforate. Shore station is poorly populated while intermediate stations of the traverse (station 6 and 7) have a large population. Among the 41 foraminiferal species, the following species viz., Ammonia beccarii, A. dentata, A. tepida, Asterorotalia inflata, Elphidium crispum, Osangularia venusta, and Quinqueloculina seminulum are found to be widespread and abundantly occurring. Sedimentological parameters such as CaCO3, organic matter determined from all these samples ranging from 11.26 – 12.22%, 0.67 - 0.90%, respectively. Out of the possible 12 sediment types (Trefethen, 1950) only three namely, sand, silty sand and clay sand are represented in this area. Among these three sediment types the most accommodative substrate for foraminiferal species has been found to be clay sand in the present area. Main ecological parameters which govern the distribution of foraminifera are organic matter content, calcium carbonate content and nature of the substrate.
Page(s): 877-887
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.42(7) [November 2013]

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