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    Environmental gradient favours functionally diverse macrobenthic community in a placer rich tropical bay

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    Sci_World_J_2013_12.pdf (1.124Mb)
    Date
    2013
    Author
    Sivadas, S.K.
    Ingole, B.S.
    Fernandes, C.E.G.
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    Abstract
    The present paper examines the functional diversity-environment relation in a placer rich tropical bay. The geographic location of Kalbadevi Bay along the west coast of India provides an opportunity to study the functional diversity pattern of macrofauna along an environmental gradient. Additionally, the area is also a potential placer mining site. Seasonal sampling was carried out for macrofauna and environmental variables. Macrofaunal functional diversity showed significant temporal variation related to the environmental parameters. The most important environmental variables were organic matter and sediment texture. Filter feeders dominated during postmonsoon which is a period when the water column is enriched with sinking detritus. The deposit feeders which rapidly ingest the settled detritus and also transport it to deeper sediment for the subsurface deposit feeders dominated during premonsoon. Abundance of carnivores was high during premonsoon, a response to increase in food in terms of deposit feeders. The result thus indicates that the temporal environmental variation influenced the macrofaunal functional diversity pattern in the Kalbadevi Bay.
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    http://drs.nio.org/drs/handle/2264/4330
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