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Effect of temperature and salinity on stable isotopic composition of shallow water benthic foraminifera: A laboratory culture study

DRS at CSIR-National Institute of Oceanography

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Title Effect of temperature and salinity on stable isotopic composition of shallow water benthic foraminifera: A laboratory culture study
 
Creator Kurtarkar, S.R.
Linshy, V.N.
Saraswat, R.
Nigam, R.
 
Contributor Malarkodi, N.
Keller, G.
Reddy, A.N.
Jaiprakash, B.C.
 
Subject Chemistry and Biogeochemistry
Chemistry and Biogeochemistry
Composition
Suspended Matter
Benthic Foraminifera
Temperature
Salinity
Sediment
Foraminifera
 
Description Quantitative estimation of past climatic parameters from stable isotopic composition of foraminifera relies on estimating the precise relationship between stable isotopic composition of the species analyzed and the physico-chemical factors of the seawater. This relationship can be established either on species collected from surface sediments or in plankton tows. Another method to establish such relationships is by subjecting the foraminiferal species to known physico-chemical parameters in the laboratory. In the present work, shallow water benthic foraminiferal species, Rosalina sp. and Pararotalia nipponica were subjected to different combinations of seawater temperature (25�C to 35�C) and salinity (25 psu to 37 psu) in the laboratory to assess their stable oxygen isotopic composition and its applicability in determining seawater temperature and salinity. The stable isotopic ratio of the species shows no consistent relationship with salinity. The relationship between ~d18O foraminifera and seawater temperature is more consistent for P. nipponica than for Rosalina sp. Salinity appears to have less control on ~d18O foraminifera as compared to the seawater temperature, within the studied salinity and temperature range. The study shows that the changes in ~d18O of P. nipponica can be used effectively to infer past seawater temperature changes.
 
Date 2014-07-25T10:58:58Z
2017-09-30T03:08:01Z
2014-07-25T10:58:58Z
2017-09-30T03:08:01Z
2013
 
Type Conference Article
 
Identifier Proceedings of XXIII Indian colloquium on micropaleontology and stratigraphy and international symposium on global bioevents in earth's history. vol.1; 2013; 157-163
http://drs.nio.org/drs/handle/2264/7607
 
Language en
 
Relation Special publication of Geological Society of India
XXIII Indian colloquium on micropaleontology and stratigraphy
NON-SCI
 
Publisher Bengaluru: Geological Society of India