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    Variations in some environmental characteristics including C and N stable isotopic composition of suspended organic matter in the Mandovi estuary

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    Environ_Monit_Assess_175_501a.pdf (479.9Kb)
    Date
    2011
    Author
    Maya, M.V.
    Soares, M.A.
    Agnihotri, R.
    Pratihary, A.K.
    Karapurkar, S.
    Naik, H.
    Naqvi, S.W.A.
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    Abstract
    Chemical and isotopic (delta sup(13)C and delta sup(15)N) investigation of the Mandovi estuary along the Indian west coast affected strongly by the seasonal monsoon cycle was carried out. The Mandovi estuary is a major waterway for Goa and extensively used for transportation of iron and manganese ore. In addition, with large population centers as well as agricultural fields located on its shores, the estuary is assumed to have been influenced by human activities. Measurements of chemical and isotopic parameters made in the lower part of the estuary during the southwest (SW) monsoon and post-monsoon seasons reveal distinct changes, and it is observed that despite considerable enrichment of macronutrients during the SW monsoon, productivity of the estuary (phytoplankton biomass), as inferred from the chlorophyll-a content, is not as high as expected. This is due to occurrences of high turbidity and cloud cover that limits photosynthetic productivity. The isotopic characterization (C and N isotopes) of suspended organic matter produced/transported during the monsoon and post-monsoon seasons of year 2007 provides a baseline dataset for future isotopic studies in such type of tropical estuaries
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    http://drs.nio.org/drs/handle/2264/3810
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