The Great Lakes Hydrilla Collaborative webinar series focuses on sharing information related to the management and monitoring of monoecious hydrilla. Webinar content has been developed based on topics of interest identified by stakeholders.
Please use the list of previous webinars below to access webinar recordings and associated files.
Introductory Webinar (December 12, 2017)
Presented by Mike Greer, USACE Buffalo, and Katie Evans, Ecology and Environment, Inc.
The webinar provides an introduction to the Great Lakes Hydrilla Collaborative, including information about the purpose of and need for the Collaborative, background information on hydrilla, and the importance of the needs assessment survey to identify issues of greatest need and to inform the content of the website and webinar series.
Management of Monoecious Hydrilla with Aquatic Herbicides: Technical Considerations and Future Outlook (February 12, 2018)
Presented by Dr. Mark Heilman, SePRO Corporation
This webinar provides an overview of aquatic herbicides used for management of monoecious hydrilla, including those used for short-term and long-term control, along with associated project examples. The webinar also includes a summary of hydrilla management strategies based on site characteristics, and conclusions related to the future outlook for the management of this species.
Monoecious Hydrilla Biology and Implications for Management (June 12, 2018)
Presented by Dr. Rob Richardson, North Carolina State University
This webinar provides an overview of the biology of monoecious hydrilla, including differences in biological features between monoecious and dioecious hydrilla. Additionally, the webinar also includes a summary of a series of research questions that influence hydrilla management decisions.
A Hydrilla Project in Ohio’s Lake Erie Basin: Detection, Control, and Prevention (September 25, 2018)
Presented by Mark Warman, Cleveland Metroparks
This webinar provides a case study on Cleveland Metroparks’ early detection, control, and prevention efforts at several sites in Northeast Ohio. The webinar also includes a discussion of herbicide treatment in hydrologically-dynamic waterbodies, evidence to halt treatment and monitoring, and the effort to build a regional surveillance network.
Monitoring and Detecting Hydrilla: Three Case Studies in New York and New Jersey (December 11, 2018)
Presented by Chris Doyle, SOLitude Lake Management
This webinar provides a discussion of the general approach to hydrilla monitoring, and also provides details on the specific approaches developed for three distinct sites: the Hudson River and New Croton Reservoir in New York, and the Delaware and Raritan Canal in New Jersey.
Hydrilla Stakeholder Outreach/Education for Pymatuning State Park in Pennsylvania and the Croton River in New York (March 5, 2019)
Presented by Stacie Hall, Assistant Manager for Pymatuning State Park with the Pennsylvania Department of Conservation and Natural Resources, and Cathy McGlynn, Aquatic Invasive Species Coordinator with the New York Department of Environmental Conservation
This webinar provides a discussion of invasive species check stations targeting boater outreach at Pymatuning State Park and other hydrilla outreach efforts for the reservoir, and the comprehensive communication strategy developed to communicate with stakeholders for the Croton River Hydrilla Control Project.
Great Lakes Hydrilla Risk Assessment (June 11, 2019)
Presented by Kris Erickson, Ecology and Environment; Dr. Matt Barnes, Texas Tech University; and Kristen Hebebrand, Chagrin River Watershed Partners
This webinar provides the framework and an overview of the risk assessment, including the distribution modeling used to support determinations of suitable habitat for hydrilla; the dispersal modeling used to understand the pathways by which hydrlla could potentially spread; environmental, economic, and social/cultural impacts; characterization of risk (i.e., where are the most vulnerable areas); and risk management recommendations and BMPs.
Two Case Studies on Hydrilla Rapid Response in the Great Lakes (November 19, 2019)
Presented by Jennifer Dunn, Biologist with the New York State Department of Environmental Conservation, Great Lakes Programs, and Mike Adam, Senior Biologist with the Lake County Health Department and Community Health Center
This webinar presents two case studies of recent hydrilla detections and rapid response efforts. The first focuses on rapid response efforts associated with a hydrilla discovery in Orchard Park, New York, and how those efforts were guided by the Framework for Response in New York. The second case study provides background on the Illinois Hydrilla Rapid Response Plan and the response to a recently documented hydrilla infestation in Libertyville, Illinois.
Potential Biological Control Agents Matched for Invasive Hydrilla Biotypes in the U.S. (May 12, 2020)
Presented by Matthew Purcell, Director of the USDA ARS Australian Biological Control Laboratory
This webinar presents the results of extensive surveys of hydrilla that have been conducted since 2014 in Asia, along with the associated surveys of herbivores found at the same sites as hydrilla. It discusses several insect herbivore species that are being evaluated to determine their potential effectiveness as biological control agents.
Management of Hydrilla on the Pymatuning Reservoir (February 23, 2022)
Presented by Nick Decker, Resource Manager, Pennsylvania Department of Conservation and Natural Resources, Bureau of State Parks
This webinar presents a case study of hydrilla management efforts on the Pymatuning Reservoir, including an overview of the actions taken over the past seven years to track and minimize the spread of hydrilla in this 22-square mile recreational use reservoir. This webinar also includes a discussion of the larger barriers to initial progress and how those were overcome, as well the results and current status.