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Proloculus size variation in Recent benthic foraminifera: Implications for paleoclimatic studies

DRS at CSIR-National Institute of Oceanography

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Title Proloculus size variation in Recent benthic foraminifera: Implications for paleoclimatic studies
 
Creator Nigam, R.
Rao, A.S.
 
Subject Oceanography and Limnology
size
salinity
temperature
sexual dimorphism
palaeoclimatology
benthos
Foraminifera
ISW, Arabian Sea
ISW, India, West Coast
 
Description Ratios of dimorphic (microspheric/megalospheric) forms of Foraminifera are affected by temperature and hence are useful in paleoclimatic studies. In some cases, however, it is not possible to distinguish between the dimorphic forms and, therefore, mean proloculus size is useful; a higher ratio means more microspheric forms and thus a lower mean size of the proloculus. To test this possibility, the mean proloculus size of Cavarotalia annectens was measured in 14 surface sediment samples from the near-shore region along the west coast of India (Bombay to Kanniyakumari), covering a stretch of 10 degrees latitude. In this region, temperature varies from 27.5 to 29.25 degrees C and salinity from 33.7 to 36.0ppt. The results show that mean proloculus size varies from 0.045 to 0.103mm, and is iversely proportional to temperature (r = - 0.78) and salinity (r = - 0.71) variations. It is proposed, therefore, that this parameter (mean proloculus size of Foraminifera) can be used as an additional tool in paleoclimatic studies
 
Date 1995-06-15T10:01:31Z
2017-09-29T13:48:13Z
1995-06-15T10:01:31Z
2017-09-29T13:48:13Z
1987
 
Type Journal Article
 
Identifier Estuarine, Coastal and Shelf Science, vol.24; 1987; 649-655
0272-7714
http://drs.nio.org/drs/handle/2264/6094
 
Language en
 
Relation Estuar Coast Shelf S
SCI
 
Publisher Elsevier