Greg Richard Spyreas

Greg Richard Spyreas holds dual roles as Associate Research Scientist in Botany at the Illinois Natural History Survey and Research Assistant Professor in Natural Resources and Environmental Sciences at the University of Illinois Urbana-Champaign. His work focuses on plant community ecology with emphasis on invasive species dynamics, wetland conservation, and human impacts on ecosystems. He contributes to ecological database development and policy-relevant research on mitigation banking and urban wildlife management.

Research interests include:

• Invasive species' effects on mutualistic relationships
• Wetland restoration and mitigation banking efficacy
• Urban deer management strategies
• Human impact assessment methodologies

Recent work demonstrates how invasive species disrupt ecological functions and evaluates wetland mitigation success. He collaborates widely on projects addressing biodiversity conservation and land-use impacts. His SPCIS database provides critical tools for tracking invasive species distributions.

Research outputs have been cited in multiple peer-reviewed journals and cited in news outlets, with significant academic engagement tracked via Mendeley readership metrics.