Nutrient and plankton dynamics in the James River
Dr. Paul Bukaveckas, associate professor in VCU’s Department of Biology and Center for Environmental Studies, and his graduate students are conducting research focused on understanding nutrient and plankton dynamics in the James River. They are coupling these data with innovative ecosystem modeling to provide river and watershed management strategies.
Dr. Paul Bukaveckas and graduate student Christina Baker measure solar energy below the surface of the James River aboard the Chesapeake, operated by the Chesapeake Bay Foundation. Measurements of solar energy at depth are used to characterize the transparency of the water and to model the timing and location of algal blooms.
Photo by William Portlock, Chesapeake BayFoundation
One ongoing study examines nutrient light constraints on phytoplankton production in the river. As part of that study, data on the optical properties of the river are collected to understand the processes that regulate water transparency. Light attenuation in the water column is measured and water samples are collected to characterize dissolved and particulate matter that contributes to the absorption and scattering of light.
Water clarity is an important determinant of where and when algal blooms may occur as well as habitat conditions for the growth of submerged aquatic vegetation such as eelgrass. Results from these studies will enable the modeling of phytoplankton responses to changes in James River nutrient concentrations, which has economic, aesthetic and biodiversity implications.
Learn more about Bukaveckas’ James River Ecosystem study.
VCU graduate student Amy Macdonald processes samples aboard the Chesapeake. Water samples were collected at various stations along the lower James River to characterize the dissolved and particulate materials that control the absorption and scattering of light within the water column.
Photo by Christina Baker, VCU