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Regeneration and abnormality in benthic foraminifer Rosalina leei: Implications in reconstructing past salinity changes

DRS at CSIR-National Institute of Oceanography

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Title Regeneration and abnormality in benthic foraminifer Rosalina leei: Implications in reconstructing past salinity changes
 
Creator Kurtarkar, S.R.
Nigam, R.
Saraswat, R.
Linshy, V.N.
 
Subject Culture experiment
Rosalina leei
regeneration
foraminifera
 
Description A laboratory culture experiment has been conducted to assess the response of marginal marine benthic foraminifer Rosalina leei to salinity and associated pH changes. Live specimens of Rosalina leei were subjected to a range (10-35 psu) of salinity. It was observed that hyposaline condition leads to dissolution of the calcareous tests. However, if the hyposaline condition persists only for a short period, then even after considerable dissolution, specimens were able to regenerate the dissolved part of the test. Additionally, in all the specimens subjected to lower than normal salinity, the regenerated chambers were abnormal. The abnormalities included smaller or larger chambers and addition of new chambers in planes different than the normal plane of the tests. The regenerated specimens, however, attained a final size almost equal to that of control specimens that were not subjected to hyposaline conditions. The differential response of R. leei was attributed to decreased seawater pH under hyposaline condition. The findings can help understand the increased abundance of abnormal specimens under ecologically stressed environments.
 
Date 2011-05-11T05:11:03Z
2011-05-11T05:11:03Z
2011
 
Type Journal Article
 
Identifier Rivista Italiana di Paleontologia e Stratigrafia, vol.117(1); 2011; 189-196
http://drs.nio.org/drs/handle/2264/3849
 
Language en
 
Rights Copyright [2011]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Universita' degli Studi di Milano