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Full-Text Articles in Physical Sciences and Mathematics
Phosphorus Cycling In Tropical Carbonate Sediment-Seagrass Systems, Zachary Howerton
Phosphorus Cycling In Tropical Carbonate Sediment-Seagrass Systems, Zachary Howerton
OES Theses and Dissertations
This thesis presents two studies focusing on phosphorus cycling in calcium carbonate sediments inhabited by seagrasses. Phosphorus is a major limiting nutrient for primary productivity in these sediments as well as in the overlying waters. In large part this is due to removal of phosphate from solution by adsorption and precipitation reactions.
In chapter II, the relationship between the size of the sedimentary phosphorus pool and the abundance of seagrass on the Great Bahama Bank, as well as the relationship between phosphorus content and grain size in the sediments, were examined to better understand the biogeochemistry of carbonate sediments and …
Response Of Natural Estuarine Algal Communities To Nitrogen Additions, Christopher Schweitzer
Response Of Natural Estuarine Algal Communities To Nitrogen Additions, Christopher Schweitzer
OES Theses and Dissertations
Coastal eutrophication resulting from nutrient over-enrichment plagues coastal waterways worldwide. In addition to dissolved inorganic N, many marine microbes, including phytoplankton, have the capacity to use certain dissolved organic nitrogen (DON) compounds. However, while we know that many specific DON compounds are labile, the bulk of the DON pool in nature is uncharacterized. The bioavailability of DON to estuarine microbes currently remains unclear.
It is becoming evident that natural phytoplankton assemblages in estuarine waters are capable of using both inorganic and organic N compounds for growth, both of which are present in anthropogenic point and non-point source discharges. Methods for …