CTAP Science and Policy Papers

Ecosystem Conservation and Management in an Era of Global Climate Change

Forest Conservation and Management

Grassland Conservation and Management

Wetland Conservation and Management (In progress)

Emerging Issues: Invasive Species (In progress)


Peer-reviewed Publications

Brandon, A., G. Spyreas, B. Molano-Flores, C. Carroll, J. Ellis. 2003. Can volunteers provide reliable data for forest vegetation surveys? Natural Areas Journal 23:254–262.

Cao, Y., R. E. DeWalt, J. L. Robinson, T. Tweddale, L. Hinz, M. Pessino. 2013. Using Maxent to model the historic distributions of stonefly species in Illinois streams and rivers: the effects of regularization and threshold selections. Ecological Modelling, 259: 30–39.

Chen, H., H. Qian, G. Spyreas, M. Crossland. 2010. Native-exotic species richness relationships across spatial scales and biotic homogenization in wetland plant communities of Illinois, USA. Diversity and Distributions 16:737–743.

DeWalt, R. E., Y. Cao, L. Hinz, T. Tweddale. 2009. Modeling of historical stonefly distributions using museum specimens. pp. 253-267. In:  Staniczek, A. H. (ed.) International Perspectives in Mayfly and Stonefly Research.  Proceedings of the 12th International Conference on Ephemeroptera and the 16th International Symposium on Plecoptera, Stuttgart 2008.  Aquatic Insects (31), Supplement 1: 747pp.  Taylor & Francis.

DeWalt, R.E., C. Favret, D.W. Webb. 2005. Just how imperiled are aquatic insects? A case study of stoneflies (Plecoptera) in Illinois. Annals of the Entomological Society of America 98:941–950.

DeWalt, R. E., S. A. Grubbs. 2011. Updates to the Stonefly Fauna of Illinois and Indiana. Illiesia, 7(3):31-50.

DeWalt, R. E., T. Tweddale, L. Fennema. 2008. Extirpation, range loss, and recolonization of stoneflies in Illinois. Proceedings of the 12th Symposium on the Natural History of Lower Tennessee and Cumberland River Valleys. The Center for Excellence for Field Biology, Austin Peay State University, Tennessee, 12: 23-38.

Favret, C., R. E. DeWalt. 2002. Comparing the Ephemeroptera and Plecoptera specimen databases at the Illinois Natural History Survey and using them to document changes in the Illinois fauna. Annals of the Entomological Society of America 95: 35-40.

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

Matthews, J.W., G. Spyreas, A. Endress. 2009. Trajectories of vegetation-based indicators used to assess wetland restoration progress. Ecological Applications 19:2093–2107.

Matthews, J.W., G. Spyreas. 2010. Convergence and divergence in wetland restoration trajectories as a framework for monitoring restoration progress. Journal of Applied Ecology 47:1128–1136.

Matthews, J.W., G. Spyreas, C.M. Long. 2015. A null model test of Floristic Quality Assessment: Are plant species' Coefficients of Conservatism valid? Ecological Indicators 52:1-7.

 T. Chabot, R. Giordano, R. E. DeWalt. 2014. Refugia and postglacial expansion of Acroneuria frisoni Stark & Brown (Plecoptera∶ Perlidae) in North America. Freshwater Science 33: 232-249.

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 24:290–299.

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

Spyreas, G., B.W. Wilm, A.E. Plocher, D.M. Ketzner, J.W. Matthews, J. Ellis, E.J. Heske. 2010. Biological consequences of invasion by reed canary grass (Phalaris arundinacea). Biological Invasions 12:1253–1267.

Webb, J. M., L. M. Jacobus, D. H. Funk, X. Zhou, B. Kondratieff, C. J. Geraci, R. E. DeWalt, D. J. Baird, B. Richard, I. Phillips, P. D. N. Hebert. 2012. A DNA Barcode Library for North American Ephemeroptera: Progress and Prospects. PLoS ONE 7(5): e38063. doi:10.1371/journal.pone.0038063/

Zhou, X., L. M. Jacobus, R. E. DeWalt, S. J. Adamowicz , P. D. N. Hebert. 2010. Ephemeroptera, Plecoptera, and Trichoptera fauna of Churchill (Manitoba, Canada): insights into biodiversity patterns from DNA barcoding. Journal of the North American Benthological Society, 29: 814-837. DOI: 10.1899/09-121.

Zhou, X., J. L. Robinson, C. J. Geraci, C. R. Parker, O. S. Flint, Jr, D. A. Etnier, D. Ruiter, R. E. DeWalt, L. M. Jacobus, P. D. N. Hebert. 2011. Accelerated construction of a regional DNA-barcode reference library: caddisflies (Trichoptera) in the Great Smoky Mountains National Park. Journal of the North American Benthological Society, 30(1):131-162.


Technical Reports, Theses, and Dissertations

Baty, J., D.N. Zaya, G. Spyreas, B. Molano-Flores, T.J. Benson.  2015. Conservation of the Illinois flora: A climate change vulnerability assessment of 73 plant species. INHS Technical Report 2015 (32). Illinois Natural History Survey. Champaign. 211 pp. 

Bol, L., A. M. Holtrop, L. C. Hinz Jr., J. Epifanio.  2007.  Evaluating streams in Illinois based on biodiversity.  Project Completion Report to the Illinois Department of Natural Resources.  Illinois Natural History Survey Technical Report 2007/57.  

DeWalt, R. E., C. A. Taylor, J. S. Tiemann, K. S. Cummings. 2009. Aquatic macroinvertebrate assemblages in Illinois: diversity, changes, and prospects for the future, pp. 163-176 In: C. A. Taylor, J. B. Taft, and C. E. Warwick (eds.). Canaries in the Catbird Seat, The Past, Present, and Future of Biological Resources in a Changing Environment. Illinois Natural History Survey Special Publication 30. 306 pp.

Ellis, J., J. Forrest, T. Rye. 2010. A Botanical Assessment of Conservation Reserve Enhancement Program (CREP) Sites in Illinois. INHS Technical Report 2010 (09). Illinois Natural History Survey. Champaign. 74 pp.

Ellis, J., J. Forrest. 2010. Additional Botanical Assessment of Conservation Reserve Enhancement Program (CREP) Sites in Illinois. INHS Technical Report 2010 (47). Illinois Natural History Survey. Champaign. 51 pp.

Mountjoy, N.J.  2014. Community-based natural resource management: Group capacity, resource management planning and assessing success.  PhD Dissertation, Southern Illinois University Carbondale. 

Sangunett, B.M. 2005. Reference conditions for streams in the Grand Prairie natural division of Illinois. M. S. Thesis, University of Illinois, Urbana-Champaign.

Spyreas, G., M.P. Ward. 2011. An Index of Biological Integrity (IBI) to monitor and assess Illinois’ wetlands.  Final Report CD 00E50901 to U.S. EPA. Illinois Natural History Survey, University of Illinois, Urbana-Champaign.

Spyreas, G. 2014. An examination of temporal trends, regional variation, and habitat-type differences in site-level Floristic Quality, and their implications for the use of Floristic Quality Assessment. PhD Dissertation, University of Illinois Urbana-Champaign.

Wallace, M.P. 2001. A floristic comparison of dry-mesic upland forest communities in Illinois. M. S. Thesis, University of Illinois, Urbana-Champaign.

Wallner, A. 2010. Evaluating North American tallgrass prairiequality using the Auchenorrhyncha quality index.  PhD Dissertation, University of Illinois Urbana-Champaign.

Wallner, A, Dietrich. 2003.  Importance of monitoring terrestrial arthropod biodiversity in Illinois ecosystems, with special reference to Auchenorrhyncha. Critical Trends Assessment Program 2003-2004 Arthropod Report. Illinois Natural History Survey, Urbana-Champaign.