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Distributional pattern of benthic foraminiferal morpho-groups in the shelf region off Mangalore: Environmental implications

DRS at CSIR-National Institute of Oceanography

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Title Distributional pattern of benthic foraminiferal morpho-groups in the shelf region off Mangalore: Environmental implications
 
Creator Khare, N.
Sinha, R.
Rai, A.K.
Nigam, R.
 
Subject foraminifera
benthic environment
geographical distribution
sediment samples
palaeoenvironments
 
Description The foraminiferal population in 45 surface sediment samples (20-86 m water depth) off Mangalore, Karnataka, India, was divided into benthic and planktonic assemblages. Within the benthic community based on the external test morphology, the population was further placed into two broad morpho-groups namely, angular-asymmetrical and rounded-symmetrical. The surficial distribution of these groups revealed that angular-asymmetrical forms are abundant in relatively deeper region whereas rounded-symmetrical forms flourish in nearshore regions. Such distinct distribution may be ascribed due to river borne turbulence. It further suggests that rounded-symmetrical forms favour high turbulence associated with increased fresh water river discharge in shallow regions. However, since fresh water river discharge is linked with precipitation over the catchment area, the results may show high potential in generating proxy data for the reconstruction of paleomonsoonal history through the study of morpho-groups in subsurface sediments of coastal regions. An anomaly in the distribution pattern is noticed off New Mangalore Port which is attributed to dredging for the navigational channel
 
Date 2009-01-25T06:05:36Z
2009-01-25T06:05:36Z
1995
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, Vol.24; 162-165p.
http://drs.nio.org/drs/handle/2264/2368
 
Language en
 
Rights Copyright [1995]. 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 NISCAIR, CSIR