NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.36 [2007] >
IJMS Vol.36(1) [March 2007] >


Title: Changes in inter-tidal foraminifera following tsunami inundation of Indian coast
Authors: Gadi, Subhadra Devi
Rajashekha, K.P
Keywords: Tsunami
Foraminifera
Sediments
Diversity
Indian Ocean
Issue Date: Mar-2007
Publisher: CSIR
Abstract: To ascertain whether severe Indian Ocean tsunami of 26 December 2004 along the coast of India generated a change in diversity of foraminifera, inter-tidal post- tsunami samples were collected between 3rd and 4th January 2005 and compared with shore samples prior to tsunami, collected during an ongoing survey between 11th and 12th December 2004. A total of 24 sediment samples from different sites were analysed for foraminiferal diversity and also for sediment characteristics. Total foraminiferal number, organic matter and calcium carbonate showed considerable increase in post-tsunami samples. Significant changes in diversity were observed as indicated by Shannon Diversity and Morisita-Horn Similarity indices. As many as 41 species belonging to 20 genera, 14 families and 3 sub-orders were identified from pre-tsunami samples, while 71 species belonging to 34 genera, 17 families and 3 sub-orders were recorded from post-tsunami samples. A marked increase in foraminiferal relicts was observed in post-tsunami samples, suggesting a large-scale transportation of deeper water, offshore sediment to intertidal zone. Thus, geological events may cause abrupt changes in foraminiferal abundance and diversity of sediments.
Page(s): 35-42
ISSN: 0379-5136
Source:IJMS Vol.36(1) [March 2007]

Files in This Item:

File Description SizeFormat
IJMS 36(1) (2007) 35-42.pdf572.08 kBAdobe PDFView/Open
 Current Page Visits: 627 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 556040 since 06-Feb-2009  Last updated on 15-Jul-2014Webmaster: nopr@niscair.res.in