Science Serving Maryland's Coasts
My research is focused on the biogeochemical cycles of nutrients,
especially Si, and the linkages between land and aquatic
ecosystems. Massive amount of amorphous silica accumulates on
land in soils from deposition of plant phytoliths and in marshes
delaying the export of weathering products from the landscape to
aquatic ecosystems. I am interested in long-term trends driven by
climate and nutrients and how ecosystems respond to changes in
the drivers. I use paleoecological techniques and analysis of long-
term monitoring data to help manage aquatic ecosystems.
Recently, my research has focused on thresholds in aquatic
ecosystems where ecosystems undergo a regime shift to an
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