Aquatic Sciences Meeting, Albuquerque 2001

PC17 Phytoplankton Physiology and Ecology

Date: Thursday, February 15, 2001

Location: Southwest Hall

Eisner, L, B, Oregon State University, Corvallis, USA, leisner@oce.orst.edu

Cowles, T, J, Oregon State University, Corvallis, USA, tjc@oce.orst.edu

PHYTOPLANKTON PIGMENTS AND IN SITU SPECTRAL ABSORPTION OFF THE OREGON COAST

Pigments are commonly used to characterize variations in species and physiology of phytoplankton assemblages. In situ spectral absorption measurements can provide information on phytoplankton pigments on fine vertical and temporal scales. In this study, we compare phytoplankton pigments and in situ spectral absorption during September 1998 off the Oregon coast. Phytoplankton pigment concentrations were determined for discrete water samples using High Performance Liquid Chromatography (HPLC). High-resolution vertical profiles of in situ spectral absorption were obtained with a WET Labs ac-9 (9 wavelength absorption and beam attenuation meter). Pigments and absorption data are compared to physical forcing mechanisms including light, nutrients and density stratification to evaluate the environmental factors driving phytoplankton species composition and physiology in Oregon coastal waters.

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Aquatic Sciences Meeting, Albuquerque 2001

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