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Geobiology of marine magnetotactic bacteria
(Massachusetts Institute of Technology, 2006)
Magnetotactic bacteria (MTB) biomineralize intracellular membrane-bound crystals of magnetite (Fe3O4) or greigite (Fe3S4), and are abundant in the suboxic to anoxic zones of stratified marine environments worldwide. Their ...
Relating behavioral context to acoustic parameters of bottlenose dolphin (Tursiops truncatus) vocalizations
(Massachusetts Institute of Technology, 2001)
This thesis presents methods to analyze the function of vocalizations of the bottlenose dolphin, Tursiops truncatus. The thesis uses the social interaction as the basic unit of analysis, and maintains a deliberate focus ...
The role of denitrification in the nitrogen cycle of New England salt marshes
(Massachusetts Institute of Technology, 2002)
I used direct measurements of nitrogen gas (N₂ fluxes and a ¹⁵N stable isotope tracer to determine the contribution of denitrification to salt marsh sediment N cycling. Denitrification in salt marsh tidal creekbottoms is ...
The aggregation of clay minerals and marine microalgal cells : physicochemical theory and implications for controlling harmful algal blooms
(Massachusetts Institute of Technology, 2001)
In recent years, the use of clay minerals has emerged as one of the most promising strategies for directly controlling harmful algal blooms (HABs). Its principle is based on the mutual aggregation of algal cells and mineral ...
Trace metals and the ecology of marine cyanobacteria
(Massachusetts Institute of Technology, 2000)
The marine cyanobacteria Synechococcus and Prochlorococcus are important primary producers in oligotrophic oceans. The abundance and cell division rates of these cyanobacteria can be influenced by trace metals such as iron ...