Roesler, C. S.. University of Connecticut,
, . S.. ,

Harmful algal species, which comprise red and brown tides, are not taxonomically related but do share an ecology leading to massive monospecific concentrations in surface waters and ultimately to the striking color they impart to the ocean, not always red or brown as the name implies. While blooms are generally found in stratified surface waters, harmful algal species exhibit broad tolerance ranges to high irradiance. Observations suggest two scenarios may exist depending upon specific tolerances to irradiance, either bloom development in the surface waters or in the subsurface waters with eventual migration to the surface. Once a bloom is formed, the resultant high irradiance attenuation in the surface layer would protect all but the most superficial organisms. Time series of ocean color response to both modes of bloom formation was simulated for a range of harmful algal species. Not only is the bloom signature unique for different species, but the time course signature is dependent on the mode of bloom development, both of which are retrievable with an inversion algorithm. Remote identification of harmful algal species and bloom formation mechanisms, obtained from time series of ocean color measurements, will yield an improved ecological understanding of these organisms in their environment.
Day: Friday, Feb. 5
Time: 02:00 - 02:15pm
Location: Eldorado Hotel
Code: SS42FR0200E