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- W1996060865 abstract "Processes governing the stability of marshes in Louisiana's Mississippi River delta plain were examined. An accretionary budget was developed for Barataria Basin fresh, brackish-intermediate and salt marshes located along a salinity gradient extending inland from the coast. The marshes represent a thin veneer overlying sediment stratum deposited by the Mississippi River and it's ancestors. At many locations rates of vertical marsh accretion were not sufficiently rapid to keep pace with increased water depth accompanying rapid subsidence due to compaction. The life span of salt marshes of the Mississippi River deltaic plain are estimated to be approximately 100 years. The mineral sediment and organic carbon requirement of individual marsh units in response to water level increase is presented. Organic matter is an important component of accretionary processes and helps the marsh surface to keep pace with water level increase. We estimated that at least 600–700 g of C m−2yr−1 must be supplied to maintain marsh accretion to balance soil oxidation-decomposition losses and organic carbon accretion (peat formation). Even though subsidence is the primary factor in marsh deterioration, accompanying factors (salt water intrusion, excess waterlogging) stress vegetation and thus reduce the organic carbon source below minimum aggradation requirements. Inorganic sediment input is also necessary for maintenance of viable marshes. Many of the marshes within the basin are not receiving sufficient nutrients from sediment source to maintain significant plant growth necessary for organic matter production. Barataria Basin marsh will likely continue disappearing unless means are implemented for reintroducing sediment from the Mississippi River." @default.
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- W1996060865 date "1990-06-01" @default.
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- W1996060865 title "Processes governing marsh formation in a rapidly subsiding coastal environment" @default.
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- W1996060865 doi "https://doi.org/10.1016/0341-8162(90)90021-5" @default.
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