Master of Science (MS)
First Advisor's Name
Ronald D. Jones
First Advisor's Committee Title
Second Advisor's Name
Third Advisor's Name
John C. Makemson
Wetland ecology, Florida, Everglades, Methanobacteriaceae, Peat soils, Marl
Date of Defense
Methanogenesis was studied in soils from two sawgrass wetlands of the Florida Everglades. Marl soils exhibited a significantly higher potential rate of methanogenesis than peat soils. In these wetlands, methanogenesis: (1) decreased rapidly with increasing soil depth, (2) increased at higher temperatures and lower Eh, (3) was stimulated by organic compounds (cellulose, glucose and acetate), and (4) remained unaffected by added ammonium. Lowering the Eh in the peat and marl soils with sulfide or sulfate stimulated methanogenesis. In January 1990, phosphate caused a significant increase in methanogenesis. The potential rates of methanogenesis decreased to undetectable levels when water levels dropped below the surface, and peaked one month after the start of the wet season. Methanogenesis appeared to be a relatively important process in carbon cycling in marl soils and these soils do not accumulate peat. Therefore, one possible explanation for peat accumulation in sawgrass wetlands may be their low rates of methanogenesis.
Bachoon, Dave S., "Potential rates of methanogenesis in peat and marl sawgrass wetlands in the Florida Everglades" (1990). FIU Electronic Theses and Dissertations. 1362.
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