Aquatic ecotoxicology with emphasis on endocrine disrupting pesticides, UV-mediated toxicant behavior, contaminated sediment toxicology, reproductive toxicology and teratogenesis, and meiobenthic ecology/aquaculture; environmental risk assessment of sediment-associated xenobiotics in estuarine ecosystems, trophic transfer of lipophilic pesticides, metals and organometals, microcosm modelling of meiobenthic communities under pollution stress, population level effects of endocrine disrupting chemicals. (2) Sediment microhabitat effects on stable isotopic and trace metal compositions of microcosm cultured deep-sea benthic foraminifera (Uvigerina, Cibicidoides, et al.); foraminiferal ecology/behavior, meiofaunal effects on mobilization of porewater trace metals