Bacteria Louisiana

Carman, K.R., Means, J.C., and Pomarico, S.C. (1996) Response to sedimentary bacteria in a Louisiana salt marsh to contamination by diesel fuel. Aquat. Microb. Ecol. 10,... 

Alkanes collected over a 12 months period, offshore from Louisiana and Florida, were characterised by Ledet and Laseter (1974) unexpectedly, methyl branched alkanes ranging in chain length from C15 to C3S and cycloalkanes were frequently the dominant components. Possible explanations for this enrichment may be selective removal by autoxidation, preferential oxidation of n-alkanes by bacteria, adsorption onto particles, a contribution from some crude oils particularly rich in methylalkanes or a contribution from certain plants containing large quantities of 3-methyl branched alkanes (Weete et ed., 1971). 

Figure 5 Effects of hypoxia on fishery resources and the benthic communities that support them. Upper right Dead demersal and bottom-dwelling fishes killed by the encroachment of near-anoxic waters onto a Grand Isle, Louisiana, beach in August 1990. Photo provided by K. M. St. Pe. Lower right dead spider crab family Majidae) at sediment surface. Photo provided by Franklin Viola. Lower left dead polychaete (family Spionidae) and filamentous sulfur bacteria. Photo provided by Franklin Viola.

Sulfate reducing bacteria can deprive gypsum of its oxygen content. Elemental sulfur is thereby formed and can be found, associated with limestone and excess gypsum, in salt-dome caprocks. Large deposits of this type have been found in the Gulf of Mexico, in Louisiana and in Texas, USA. 

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