Invasive Species in the Hudson Valley

Science & Management Forum
Hosted: March 21, 2015

Learn from experts...

  • How invasive species alter the way ecosystems function
  • Why natives are preferable for wildlife and pollinator habitat, forest regeneration, soil health, and other services
  • Where and how stewards should focus their removal efforts
  • What new invaders you should be on the lookout for
  • Current policies regulating invasive species and action that is needed

Hosted by the Cary Institute of Ecosystem Studies and Dutchess Land Conservancy.

Speakers & Videos

Causes and Ecosystem Impacts of Invasive Species: Spotlight on Forest Pests and Pathogens
Gary Lovett, Forest Ecologist, Cary Institute of Ecosystem Studies

Gary Lovett is a forest ecologist at the Cary Institute of Ecosystem Studies. He received his Ph.D. from Dartmouth College. Gary’s work investigates how air pollution and invasive pests and pathogens shape forest ecosystems, with a focus on productivity, water quality, and nutrient dynamics. He is currently leading a team of scientists writing a journal article on the ecological and economic impact of forest pests and pathogens, including policy options for preventing future invasions.

View video and presentation >

Aliens in Our Uplands: Managing Past Mistakes, Preventing New Recruits
Linda Rohleder, Director of Land Stewardship at the NY/NJ Trail Conference and Coordinator for Lower Hudson PRISM

Linda Rohleder is the land stewardship director with the New York-New Jersey Trail Conference. She also serves as the director of the Lower Hudson Partnership for Regional Invasive Species Management (PRISM). Linda received her Ph.D. from Rutgers University. Her work explores strategies for addressing exotic species invasions, with the goal of preserving trail habitat and restoring protected areas. This includes managing an invasive species strike team.

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Freshwater Invasions in the Hudson Valley: Causes, Impacts, and Management
David Strayer, Freshwater Ecologist, Cary Institute of Ecosystem Studies

David Strayer is a freshwater ecologist at the Cary Institute of Ecosystem Studies. He received his Ph.D. from Cornell University. For three decades, Dave has been investigating freshwater invasive species, with a focus on how zebra mussels have altered the ecology of the Hudson River. He is also an expert on native pearly mussels and is working with New York State Department of Environmental Conservation colleagues to restore Hudson River shorelines.

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Utilizing a Terrestrial Invasive Species Rapid Response Team in the Adirondacks: Results and Lessons Learned
Brendan Quirion, Program Coordinator, Adirondack Park Invasive Plant Program

Brendan Quirion coordinates the Adirondack Park Invasive Plant Program for the Nature Conservancy. He received his B.T. from the State University of New York at Cobleskill. Brendan’s work strives to protect the ecological integrity of the six million acre Adirondack Park through the prevention and management of invasive species. This includes strategic partnerships with community groups and landowners.

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Resources for Landowners and Stewards
Carri Marschner, Invasive Species Specialist, Cornell Cooperative Extension

Carri Marschner is an invasive species specialist with Cornell Cooperative Extension’s statewide Invasive Species Program. She received her M.S. from Miami University’s Institute of Environmental Science. Carri’s expertise includes invasive species that impact aquatic systems, natural areas, and agricultural crops. Her current work focuses on providing outreach and education support to the New York’s eight regional invasive species management groups (PRISMs), Cornell Cooperative Extension’s county programs, and state projects.

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Roundtable Discussion: Pulling Together to Stop the Spread
Julie Hart, Senior Manager of Stewardship and Education, Dutchess Land Conservancy; Gary Lovett; Carri Marschner; Brendan Quirion; Linda Rohleder; David Strayer

Julie Hart manages stewardship and education programs at the Dutchess Land Conservancy. She received her B.A. degree from Bard College. Julie is responsible for the stewardship of conservation easement-protected properties and for developing the Conservancy’s education programs.

Becky Thornton is the President of the Dutchess Land Conservancy, an organization that has protected over 39,000 acres of open land since its inception in 1985. She received her M.S. from Northeastern University. She is responsible for the successful management of the Conservancy’s operations so that it may succeed in its mission to preserve and steward the scenic, agricultural and important environmental resources in Dutchess County.

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The emerald ash borer is an Asian beetle that infests and kills North American ash species (Fraxinus sp.) including green, white, black, and blue ash. All native ash trees are vulnerable. Photo credit: Virginia Polytechnic Institute.

Additional Resources

Web sites

New York Invasive Species Clearinghouse

Online tool for recording and identifying species

Invasive Plant Management Decision Analysis Tool


Citizen science opportunity. iMapInvasives is an online mapping tool that supports efforts to protect New York State from invasive species.

You can learn about the program and become trained to contribute data by attending an iMapInvasives training session. There will be a session on May 18, 2015 at the Farm & Home Center in Millbrook, NY. Check online for other scheduled locations and dates.

basic training packet >
advanced training packet >
overview of program >
flyer >


Cary lecture videos

Bringing Nature Home

Drawing from his bestselling book, Bringing Nature Home, Douglas Tallamy discusses how using native plants in the home landscape can help protect and preserve North American wildlife.

Setting a Process in Motion: The Self-Proliferating Landscape

Well-known landscape designer Larry Weaner discusses principles and protocols for creating dynamic, ecologically rich landscapes where nature does much of the “planting.”

Cary Institute of Ecosystem Studies | Millbrook, New York 12545 | Tel (845) 677-5343

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