Record Details

Living planktonic foraminifera during the late summer monsoon period in the Arabian Sea

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Living planktonic foraminifera during the late summer monsoon period in the Arabian Sea
 
Creator Guptha, M.V.S.
Mohan, R.
Muralinath, A.S.
 
Subject Aquatic Communities
plankton
monsoons
identification
population density
upwelling
Foraminifera
ISW, Arabian Sea
 
Description During the late summer monsoon living planktonic foraminifera were collected in the southeastern Arabian Sea between 3~'N and 15~'N by using six vertical plankton tows. Sixteen species of planktonic foraminifera were identified. Among them, @iGlobigerinoides ruber@@ and @iG. sacculifer@@ are the most abundant species, while the ecologically most important species @iGlobigerina bulloides@@ is very rare. The low abundance of @iG. bulloides@@ can be explained by the warming of the surface water in combination with deepening of the mixed layer, since this species preferentially dwells in nutrient-rich upwelling waters. The population density of planktonic foraminifera ranges between 31 and 185 specimens per 10@u-3@@m@u3@@. The low absolute numbers of planktonic foraminifera are similar to the numbers which were reported before from the non-upwelling areas in the Arabian Sea. The low absolute numbers and the collected foraminiferal assemblages are therefore highly indicative of the Arabian Sea non-upwelling areas. Particularly significant are the low absolute and relative numbers of the non-spinose species @iGloborotalia menardii@@ and @iNeogloboquadrina dutertrei@@. The absence of these species indicate the relatively low nutrient levels in this area at the tail end of the summer monsoon period
 
Date 1994-10-17T10:06:27Z
2017-09-30T01:55:43Z
1994-10-17T10:06:27Z
2017-09-30T01:55:43Z
1994
 
Type Journal Article
 
Identifier Marine Geology, vol.120(3-4); 1994; 365-371
0025-3227
http://drs.nio.org/drs/handle/2264/7389
 
Language en
 
Relation Mar Geol
SCI
 
Publisher Elsevier