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Environmental influences on the species diversity, biomass and population density of soft bottom macrofauna in the estuarine system of Goa, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Environmental influences on the species diversity, biomass and population density of soft bottom macrofauna in the estuarine system of Goa, west coast of India
 
Creator Harkantra, S.N.
Rodrigues, N.R.
 
Subject species abundance
species diversity
species diversity index
population density
 
Description A total of 58 species were recorded belonging to polychaetes, molluscs, crustaceans and other minor groups in order of species abundance. eighteen species are new to the local fauna that were not reported earlier. The maximum mean species diversity index (Shannon-Wiener), total biomass (wet) and total population density recorded were 2.3 (Z1), 6.7 g/m sup(2) (M1) and 703 no./m sup(2) (M2) respectively. Significantly higher species diversity was observed at high salinity, fine sand and high sedimentary biochemical parameters of total organic carbon (TOC), total organic nitrogen (TON) and carbon of biopolymeric fraction (C-BPF) sites. Medium grain size sites supported significant high biomass whereas population density showed no significant difference among the sites. The best multiple linear regression model revealed that all the 13 parameters studied were significant influencing parameters on species diversity, biomass and population density with exception of temperature. Among these salinity and TON were the main significant parameters. The combination of significant influencing environmental parameters, % variation and Mallows' Cp values varied from sites to biotic parameters. This explained 32-72% of the total variance. The regression model derived from this data helps in detection of these biotic parameters and detection of pollution-induced effects.
 
Date 2006-09-20T11:42:19Z
2006-09-20T11:42:19Z
2004
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.33(2), 187-193p.
http://drs.nio.org/drs/handle/2264/416
 
Language en
 
Rights This digital version of the paper hosted with the permission from IJMS/NISCAIR.
http://www.niscair.res.in
 
Format 113200 bytes
application/pdf
 
Publisher NISCAIR, CSIR