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Ontogenetic isotopic variation in foraminifera - Implications for palaeo proxy

DSpace at IIT Bombay

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Title Ontogenetic isotopic variation in foraminifera - Implications for palaeo proxy
 
Creator SARASWATI, PK
 
Subject benthic foraminifera
larger foraminifera
stable isotopes
paleotemperatures
fractionation
variability
okinawa
akajima
oxygen
carbon
 
Description The oxygen isotopic composition (delta(18)O) of Marginopora kudakajimaensis (Foraminiferida) is found to differ by 0.5parts per thousand among the individuals living under similar physico-chemical conditions. The delta(18)O variation along the growth direction (ontogeny) is much higher, ranging between 1.5,and 2.5parts per thousand. In comparison, the ontogenetic variation in carbon isotopes (delta(13)C) is relatively small. The range and standard deviation of ontogenetic delta(18)O decrease progressively for deeper water species. There is no such systematic change in oft values. The study suggests that as palaeo proxy, the isotopic data not only require correct species discrimination but also a good understanding of the palaeobiology of the species.
 
Publisher CURRENT SCIENCE ASSN
 
Date 2011-07-21T06:58:20Z
2011-12-26T12:51:56Z
2011-12-27T05:38:44Z
2011-07-21T06:58:20Z
2011-12-26T12:51:56Z
2011-12-27T05:38:44Z
2004
 
Type Article
 
Identifier CURRENT SCIENCE, 86(6), 858-860
0011-3891
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5821
http://hdl.handle.net/10054/5821
 
Language en