Illinois Natural History Survey - University of Illinois

Greg Spyreas
Title: Research Scientist: Plant Ecology & Botany
Mailing address:
1816 S. Oak Street
Champaign, IL 61820
Office address:
Address mailcode: 652
Office room:
Location: Forbes Building (I-BLDG)
Phone: 217 300-4023

Ecological work and research that aims to bring about better conservation, restoration, management, monitoring, and understanding of natural areas and their floras/faunas-- mainly in human dominated landscapes.
Applied ecology in the Midwestern U.S., mainly related to:
---Conservation of Biodiversity;
---Non-native plant invasions;
---Restoration Ecology;
---Natural areas management;
---Urban Ecology;
---Fire Ecology;
---Human disturbance in natural areas;
---Floristic Quality Assessment;
---Oak-hickory forest regeneration;
---Vegetation monitoring
Message to students:

Please send me an email to discuss potential opportunities

Professional affiliations:
Selected publications:
SELECT GENERAL AUDIENCE                                                      
SELECT SCIENTIFIC                                      
Spyreas, G. 2019. Floristic Quality Assessment: a critique, a defense, and a primer. Ecosphere. (PDF) (ESA).
Pearse, I., H. Sofaer, D. Zaya, and G. Spyreas. 2019. Non-native plants have greater impacts because of differing per-capita effects and non-linear abundance-impact curves. Ecology Letters. (PDF(JSTOR).
Price, E., Spyreas, G., and J.W. Matthews. 2019.Wetland compensation and its impacts on ß-diversity. Ecological Applications 29(1) 1-11. (PDF(JSTOR) 
Price, E., Spyreas, G., Matthews, J.W. 2017. Biotic homogenization of regional wetland plant communities within short time-scales in the presence of an aggressive invader. Journal of Ecology: 1-11 (PDF) (British Ecological Society
Zaya*, D.N., Pearse*, I., and Spyreas*, G. 2017. Long-term trends in midwestern milkweed abundance and their relevance to monarch butterfly declines. BioScience 67(4): 343-356 (PDF) (Oxford Press)
Spyreas, G. 2016. Scale and Sampling effects on Floristic Quality. PLoS One 11(8) (download)
Baty, J.H., Zaya, D.N., Spyreas, G., Molano-Flores, B., Benson, T.J. 2015. Conservation of the Illinois flora: A climate change vulnerability assessment of 73 plant species. Illinois Natural History Survey, Technical Report (32) (PDF)
Matthews, J.W., Spyreas, G. and Long, C.M. 2015. A null model test of Floristic Quality Assessment: Are plant species’ Coefficients of Conservatism valid? Ecological Indicators. 52: 1–7 (PDF) (Science Direct)
Spyreas, G., Meiners, S., Matthews, J.W., and Molano-Flores, B. 2012. Successional trends in Floristic Quality. Journal of Applied Ecology 49(2): 339-348 (PDF) (WIley)

McClain, W. E., T. L. Esker, B. R. Edgin, G. Spyreas, and J. E. Ebinger. 2010. Fire History of a post oak (Quercus stellata Wang.) woodland in Hamilton County, Illinois U.S.A. Castanea 75(4) 461-474.(PDF) (BioOne)

Lankau, R., V. Nuzzo, G. Spyreas, and A. S. Davis. 2009. New evolutionary limits ameliorate the negative impact of an invasive plant. Proceedings of the National Academy of Sciences 106(36): 15362-15367.(PDF) (National Academy of Sciences) (PubMed)

Spyreas, G. and J.W. Matthews. 2006. Floristic conservation value, nested understory floras, and the development of second-growth forest. Ecological Applications 16(4): 1351-1366.(PDF) (JSTOR)

Spyreas, G., J. Ellis, C. Carroll, B. Molano-Flores. 2004. Non-native plant commonness and dominance in the forests, wetlands, and grasslands of Illinois, USA. Natural Areas Journal 24(4):290-299.(PDF) (NAA Journal)

All publications available here
INHS Publink:
Program affiliates:
Adjunct Assistant Professor, Department of Natural Resources and Environmental Sciences, University of Illinois Champaign-Urbana
Professional society involvement and activities:
Editorial Board, Ecological Restoration
Editorial Board, Erigenia

PHD, Natural Resources and Environmental Sciences, University of Illinois Champaign-Urbana, 2014

MS, Plant Biology, Southern Illinois University-Carbondale, 2000

BA, Environmental Studies, Denison University, 1997

Lab name: Lab research: Lab publications: Lab current projects:

Illinois Natural History Survey

1816 South Oak Street, MC 652
Champaign, IL 61820

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