Research Archive: Plankton Ecology

Using plankton nets, a dissecting microscope, a video-microscope, and standard plankton preservation and study techniques, interns at The River Project have collected and identified some of the hundreds of species of local zooplankton and correlated results with temperature and salinity in an effort to characterize environmental conditions that predict the occurrence of various species. In 2003, the first year of this study, data was collected from July through August as part of a summer study. It was determined that copepods are found throughout the Hudson River Estuary in all water conditions, in salinities ranging from 10.6 to 20.6 ppt (parts per thousand). Acartia tonsa was the most common species, found in every tow, while fish eggs, polychaete worms, crab larvae (zoea), jellyfish and ctenophores were also frequently observed.


Dr. Michael Levandowsky, Professor of Microbiology, Haskins Laboratory, Pace University