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Distribution of benthic foraminifera within oxygen minima zone, off central west coast, India

DRS at CSIR-National Institute of Oceanography

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Title Distribution of benthic foraminifera within oxygen minima zone, off central west coast, India
 
Creator Mazumder, A.
Henriques, P.J.
Nigam, R.
 
Subject Arabian Sea
oxygen minima zone
 
Description A total of 128 surface sediment samples (76 grab and 52 core top samples) were analyzed for benthic foraminiferal contents from the region off Goa, India in the eastern Arabian Sea upto a water depth of 3300 m. 195 species of benthic foraminifera were identified. Species belonging to Bolivina, Cassidulina, Lernella, Uvigerina and Eponides were found to be the most abundant within the depth zone of 150 to 1500 m - a zone considered to be Oxygen Minima Zone (OMZ) for Arabian Sea. Comparison of benthic foraminiferal species abundance in OMZ of Arabian Sea with other parts of the world oceans reveals some interesting facts. Bulimina marginata, which has been reported to be present in considerable number within the OMZ in other regions of the world oceans, accounted for only about 2% of the total benthic foraminifera population in the present area. On the contrary, Bulimina costata constituted more than 15% of the total foraminifera, which has not been reported to be abundant from OMZ of any other region of the world. This study confirms the presence of characteristic nature of the oxygen minima zone in the eastern Arabian Sea
 
Date 2006-09-13T06:43:00Z
2006-09-13T06:43:00Z
2003
 
Type Journal Article
 
Identifier Gondwana Geological Magazine, vol.6, 5-10p.
http://drs.nio.org/drs/handle/2264/386
 
Language en
 
Format 106665 bytes
application/pdf
 
Publisher Gondwana Geological Society