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- W2003105571 abstract "Abstract Water, sediment and interstitial water in nearshore marshes and swamps along a proposed oil pipeline route in the Louisiana coastal zone were analyzed. The primary objectives were to understand the chemical mechanisms involved and to depict the levels of chemical components in natural environments and in environments altered by man's activities. The brackish and fresh marshes showed the highest organic deposition due to low tidal flushing and runoff rate. High nutrient levels were found in waters of these environments due in part to release from the nutrientladen interstitial water which maintained a dynamic equilibrium with biological activities and organic matter in sediments. Sulfides, expressed as ratio of FeS to organic content was much higher in the saline environment than in the low saline system. Low activities of sulfate reducing microorganisms, limited sulfate and organic-S concentrations in the freshwater environment accounted for the low sulfide level. Impairment of water circulation in the salt marsh resulted in drastic fluctuation in dissolved oxygen and concurrent but inverse changes in sulfide level in sediments and in interstitial NH + 4 and PO −3 4 in spite of relatively low sediment organic matter. Drainage of fertilizer from agricultural fields and to stagnation in freshwater swamps resulted in persistently lowest dissolved oxygen in swamp water without raising the sulfide level to a great extent in sediment. Detailed discussion on the interrelationships among various factors is presented." @default.
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- W2003105571 date "1977-12-01" @default.
- W2003105571 modified "2023-09-27" @default.
- W2003105571 title "Chemical environment of coastal marshes and swamps, Louisiana" @default.
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- W2003105571 doi "https://doi.org/10.1016/0341-8162(77)90005-4" @default.
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