Marine meiobenthos as indicators of environmental change: Pollution to paleoclimatology
G. Thomas Chandler, Ph.D.
University of South Carolina
Wednesday, April 20, 2005
Pacific Forum – 3:00 p.m.
The meiobenthic ecotoxicology laboratory at the University of South Carolina has developed a number of new approaches for addressing questions ranging from fate and effects of pesticides in coastal systems, to the fidelity of microfossils as recorders of paleochemical signals in ancient oceans. Our most recent toxicological research has focused on assessing the chronic impacts of environmentally-relevant concentrations of endocrine-disrupting chemicals (EDCs) and reproductively-active chemicals of “emerging” importance to estuarine health (e.g., the phenylpyrazole GABA-disruptor, fipronil). This work uses sediment and microplate cultures of individual meiobenthic copepods to produce population-level models of multigenerational risk. Our micropaleo work has focused on a unique record of success for chemostat lab culture of deep-ocean benthic foraminifera under trace-element and stable-isotope controlled seawater conditions. Individuals are reared from schizont to adult with their shell chemistries analyzed as a function of manipulations of their culture environments using high resolution ICP-MS, laser ablation, and Raman IR spectroscopy.