Life Sciences Seminar: Microplastic pollution in the Lake Ontario basin
Microplastic pollution in the Lake Ontario basin: sources, fate and transport
Dr. Christy Tyler (GSoLS)
Dr. Matt Hoffman (SMS)
Dr. Nathan Eddingsaas (SCMS)
College of Science
Rochester Institute of Technology
Abstract:
A growing body of work encompassing both hydrodynamic models and empirical study indicates that in freshwater ecosystems, microplastic particles are largely deposited in the benthos. However, there remains great uncertainty about transport pathways from entry into the environment until deposition to the sediment or flushing from the system. Further, the transformation of chemical and physical properties and associated changes in biofouling communities, which varies with both polymer type and receiving water body, will significantly influence the rate of particle delivery and the ultimate fate and impact to organisms and processes. Our work aims to provide a holistic view of the life cycle of plastics in freshwater ecosystems in the Lake Ontario basin, with a focus on polymers and processes that influence benthic ecosystem function. We are evaluating the physical, chemical and biological changes that take place as plastic “ages” in five representative receiving water bodies, and how these changes impact potential delivery of particles to the benthos. Then, in a series of microcosm experiments, we assess the cascading impact that these changes have on benthic organisms and ecosystem processes. Our results to date suggest variation in settling velocity, chemical composition and biofouling over time, across ecosystem and among polymer types that leads to shifts in risk and toxicity in the benthos.
Intended Audience:
Beginners, undergraduates, graduates. Those with interest in the topic.
Event Snapshot
When and Where
Who
Open to the Public
Interpreter Requested?
No