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IJMS Vol.35(3) [September 2006] >


Title: Size variations of planktonic foraminiferal population in the Indian Ocean sector of Southern Ocean
Authors: Khare, N.
Chaturvedi, S.K.
Keywords: Size variation
Planktonic foraminifera
Nutrient
Southern Ocean
Antarctic Circumpolar Current
Fronts
Issue Date: Sep-2006
Publisher: CSIR
Abstract: Twenty five surface sediment samples (comprising Peterson Grab, Piston, Gravity and Spade core top samples) were collected along a north-south transect (between 9.69º N and 55.01º S latitude and 80º E and 40º E longitude). On the basis of overall size, the total planktonic population has been divided into two groups (> 120 μm sized population and <120 μm sized population). The results show an apparent interrelationship between shell size and variations in hydrographic conditions such as food availability/nutrition (phosphate) of ambient water masses. It is apparent that nutrients play a significant role in determining the size of the foraminiferal population and an increase in the nutrient supply is conducive for the growth of the planktonic population.
Page(s): 221-226
ISSN: 0379-5136
Source: IJMS Vol.35(3) [September 2006]

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