• Login
    View Item 
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Sources, distribution and preservation of organic matter in a tropical estuary (Godavari, India)

    Thumbnail
    View/Open
    Estuar_Coast_38_1032a.pdf (624.6Kb)
    Date
    2015
    Author
    Krishna, M.S.
    Naidu, S.A.
    Subbaiah, Ch.V.
    Gawade, L.
    Sarma, V.V.S.S.
    Reddy, N.P.C.
    Metadata
    Show full item record
    Abstract
    Major sources and distribution of organic matter (OM) were examined in a tropical monsoonal estuary, the Godavari, using content and isotopic signatures in suspended particulate matter and surface sediments during no-discharge period. The lower (<10 km from the mouth) and upper (>10 km) estuaries have shown remarkably different features with reference to the sources, distribution and preservation of OM. The upper estuary is characterized by relatively high content of particulate organic carbon (POC) and chlorophyll-a (Chl-a) and low suspended matter and sediment OC. In contrast, the lower estuary is characterized by relatively low content of particulate OC and Chl-a and high suspended matter and sediment OC. Our data and model results showed that suspended particulate OM is derived predominantly from freshwater phytoplankton in the upper (~85 %) and lower (~60 %) estuaries, with a minor contribution from estuarine phytoplankton (~25 %) and terrestrial C<sub>3</sub> plants (~10 %) in the lower estuary, during the study period. On the other hand, sediment OM in the upper and lower estuaries derived from both autochthonous and allochthonous sources with nearly equal contributions. Although relatively high in situ production was observed in the upper than the lower estuary, relatively low sediment OC was found in the former than the latter region, suggesting that strong influence of preservation conditions rather than surface biological production on OC accumulation in sediments. This is attributed to intense transformation of OM by heterotrophs in the upper than the lower estuary because of prevailing conducive conditions for degradation of OM in the upper estuary during the study period.
    URI
    http://drs.nio.org/drs/handle/2264/4742
    Collections
    • Scholarly literature [8673]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV