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Communities and coexistence of benthos in northern limb of Cochin Backwaters

DRS at CSIR-National Institute of Oceanography

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Title Communities and coexistence of benthos in northern limb of Cochin Backwaters
 
Creator Devi, K.S.
Jayalakshmy, K.V.
Venugopal, P.
 
Subject benthos
species
geographical distribution
environmental factors
 
Description Occurrence and coexistence of benthic communities of 9 stations in the northern limb of Cochin Backwaters (Kerala, India) where an industrial belt (mostly chemical industries) is located are studied. Polychaetes with 30 species are the most common among groups present at all the stations. Capitella capitata which showed high density near the effluent discharge site is proposed as an indicator of pollution. Dendronereis aestuarina present at all stations and in high densities at sts 5, 6 and 8, can be considered as a pollution resistant species. Lycastis indica, Paraheteromastus tenuis, Telehspia annandalei, chironimid larvae and Pendora flexousa present at st 8, even though in very low numbers, can be treated as pollution tolerant species. The number and the size of the clusters show a steady decline from sts 1 to 8. Maximum affinity is for adjacent stations and never exceeded 60%. Negative affinity indices obtained are deemed indicative of the varied environmental conditions. Results indicate limited spatial migration and possible niche separation
 
Date 2009-05-12T10:15:22Z
2009-05-12T10:15:22Z
1991
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, Vol.20(4); 249-254p.
http://drs.nio.org/drs/handle/2264/3185
 
Language en
 
Rights Copyright [1991]. 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, New Delhi