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Role of environmental heterogeneity in structuring the macrobenthic community in a tropical sandy beach, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Role of environmental heterogeneity in structuring the macrobenthic community in a tropical sandy beach, west coast of India
 
Creator Sivadas, S.
Ingole, B.S.
Ganesan, P.
Sautya, S.
Nanajkar, M.
 
Subject benthos
zoobenthos
species diversity
spatial variations
temporal variations
 
Description In most ecosystems, community structure emerges as a result of the complex interaction between biotic and environmental variables. Sandy beaches connected to adjacent ecosystem like estuaries/creeks provide an opportunity to understand the role of the environment on the community. Kalbadevi beach along the central west coast of India, invaded by creeks at the northern and southern ends, provides an opportunity to investigate the role of environmental heterogeneity in structuring the intertidal macrofaunal communities. Further, the annual tropical rainfall brings about drastic changes in the environmental parameters. Seasonal survey was carried out at 10 transects covering the entire beach of Kalbadevi for environmental and macrofaunal studies. We quantified the abundance, biomass, assemblage structure and distribution of macrofauna at different spatio-temporal scales. The univariate and multivariate analyses showed significant spatio-temporal variability in the biotic and abiotic variables. BIOENV analyses showed the best correlation with OC, phaeopigment and grain size. High abundance of macrofauna in the north and south was due to food availability, influenced by the creek. The low abundance during monsoon and subsequent increase in the post-monsoon can be attributed to annual spawning and recruitment of tropical fauna. Therefore, the present research suggests that the other environmental variables also play an important role in structuring the macrofauna of sandy beach. This supports our hypothesis that environmental heterogeneity influences the structuring of macrofaunal community.
 
Date 2012-04-04T12:10:24Z
2012-04-04T12:10:24Z
2012
 
Type Journal Article
 
Identifier Journal of Oceanography vol.68; 2012; 295-305
no
http://drs.nio.org/drs/handle/2264/4040
 
Language en
 
Relation J_Oceanogr_68_295.jpg
 
Rights An edited version of this paper was published by Springer. This paper is for R & D purpose and ? The Oceanographic Society of Japan and Springer 2012
 
Publisher Springer