Record Details

Respiratory enzyme activities in the oxygen-deficient waters of the Arabian Sea

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Respiratory enzyme activities in the oxygen-deficient waters of the Arabian Sea
 
Creator Shailaja, M.S.
 
Subject Arabian Sea
denitrification activities
transparent exopolymer particles
secondary nitrite maximum
 
Description Denitrification in the oxygen-poor waters at intermediate depths in the Arabian Sea is very intense. Depth profiles of nitrite and the activities of the electron transport system (ETS) and dissimilatory enzymes such as nitrate reductase and nitrite reductase within the nitrite-bearing waters, display depth-mismatched maxima. There are indications of contribution by both dissimilatory nitrate reduction and nitrification to the nitrite enrichment of the secondary nitrite maximum (SNM) between 150 and 350 m. The waters below the SNM, not bearing nitrite but within the oxygen minimum zone, are also potentially denitrifying. Analyses of the relationships between various parameters indicate the existence of a layered ecosystem in which nitrification and denitrification activities are present in several closely-spaced layers. This is probably caused by the inflow of different water masses into this hypoxic region, as suggested by the strong maxima and minima in enzyme activities at equivalent depths.
 
Date 2006-08-28T07:47:10Z
2006-08-28T07:47:10Z
2001
 
Type Journal Article
 
Identifier Current Science, vol.81(6), 684-689pp.
http://drs.nio.org/drs/handle/2264/272
 
Language en
 
Format 117760 bytes
application/pdf
 
Publisher Indian Academy of Sciences