Seasonal variations in the sediment biogenic properties of a tropical mangrove environment,southwest coast of India |
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| Authors: | M Nair J Jacob P A Nisha G D Martin K Srinivas P Sheeba C M Laluraj T Joseph K K Balachandran |
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| Institution: | (1) National Institute of Oceanography, Regional Centre, Council of Scientific and Industrial Research, Kochi, 682018, India;(2) National Centre for Antarctic and Ocean Research, Goa, 403804, India |
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| Abstract: | Temporal and spatial changes in the sediment properties of a mangrove ecosystem (Cochin, southwest coast India) are presented.
The region was freshwater dominated during monsoon (June–September) and seawater dominated during other two seasons. The system
remained eutrophic due to the high inputs of organic matter (OM) during most part of the year. The organic-rich sediments
accumulated high amount of carbohydrates (22% of OM) and proteins (11% of OM) during non-monsoon months as compared to coastal
environments. Principal component analysis showed that the biochemical properties are uniformly influenced by seasonal and
spatial variations. Higher concentrations of sediment protein over carbohydrate indicate an efficient mineralization leading
to the non-availability of aged OM in the system. The dominance of these labile components is generally indicative of the
eutrophic condition of the system. |
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