Robert J. Warren II, Assistant Professor
My research program focuses on how species interactions, including those involving exotic invaders, shift with environmental conditions and in the context of a changing global climate. Some big questions are: (1) How do positive and negative multi-trophic interactions shape niche requirements along environmental gradients? (2) How might co-evolved interactions, such as those between seed-dispersing ants and herbaceous plants, shift with climate change? (3) How often does the correspondence between a species' niche and its realized distribution become a mismatch?
Primary Organization: SUNY Buffalo State
Dr. Robert J. Warren II
123 Science and Mathematics Complex
1300 Elmwood Avenue
Buffalo, NY 14222
CWT Data Sets:
1205 (Gleditsia triacanthos (honey locust) field experiments in Southern Appalachian Mountains region)
1206 (Gleditsia triacanthos (honey locust) greenhouse experiment)
1204 (Gleditsia triacanthos (honey locust) survey in Southern Appalachian Mountains region)
1203 (Tipularia discolor plant demography 1999-2004)
1202 (Hexastylis arifolia (Asarum canadensis) plant demography 1999-2006 at the Coweeta Hydrologic Laboratory, Chattahoochee National Forest, and Whitehall Forest)
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CWT Publications and Presentations: (custom bibliography)
Warren, R. J., II, S. M. Pearson, S. Henry, K. Rossouw, J. P. Love, M. J. Olejniczak, K. J. Elliott, and M. A. Bradford. 2015. Cryptic indirect effects of exurban edges on a woodland community. Ecosphere 6(11):218. http://dx.doi.org/10.1890/ES15-00318.1
Bradford, Mark A., Robert J.Warren II, Petr Baldrian, Thomas W. Crowther, Daniel S. Maynard, Emily E. Oldfield,William R.Wieder, Stephen A.Wood and Joshua R. King, 2014. Climate Fails to Predict Wood Decomposition at Regional Scales. In Nature Climate Change, Letters, advanced online publication at www.nature.com/natureclimatechange
Fraterrigo, J.M., Wagner, S. and Warren, R.J. II. 2014. Local-scale biotic interactions embedded in macroscale climate drivers suggest Eltonian noise hypothesis distribution patterns for an invasive grass. Ecology Letters. 17:1447-1454.
Kramer, Timothy D., Robert J. Warren II, Yaya Tang and Mark Bradford (2012) Grass Invasions Across a Regional Gradient are Associated with Declines in Belowground Carbon Pools (online document: http://www.springerlink.com/content/x70400184h168455/)
Jones, J.A., Creed, I.F., Hatcher, K.L., Warren, R.J., Adams, M.B., Benson, M.H. Boose, E., Brown, W.A. Campbell, J.L., Covich, A., Clow, D.W., Dahm , C.N., Elder, K., Ford, C.R., Grimm , N.B., Henshaw, D.L., Larson, K.L., Miles, E.S., Miles, K.M., Sebestyen, S.D., Spargo, A.T., Stone, A.B., Vose, J.M., Williams, M.W., 2012. Ecosystem Processes and Human Influences Regulate Streamflow Response to Climate Change at LTER Sites. BioScience. Vol. 62:4, April 2012
Tang Yaya, Robert Warren III, Timothy Kramer, and Mark Bradford (2012) Plant invasion impacts on arthropod abundance, diversity and feeding consistent across environmental and geographic gradients. Biological Invasions:1-13. Online Version DOI: http://dx.doi.org/10.1007/s10530-012-0258-1.
Warren, R.J, Giladi, I., Bradford, M.A. (2012) Environmental heterogeneity and interspecific interactions influence nest colonization by key seed-dispersing ants. Environmental Entomology, 41, 463-468.
Warren II, R. J., V. Bahn, T. D. Kramer, Y. Tang, and M. A. Bradford. 2011. Performance and reproduction of an exotic invader across temperate forest gradients. Ecosphere 2(2):art14. doi:10.1890/ES10-00181.1
Warren, R. J. II, V. Bahn, and M. A. Bradford. 2011. Temperature cues phenological synchrony in ant-mediated seed dispersal. Global Change Biology (Online First). doi: 10.1111/j.1365-2486.2010.02386.x.
Warren, Robert J., II, Bahn, V., and Bradford, M.A., 2011, The interaction between propagule pressure, habitat suitability and density-dependent reproduction in species invasion, Oikos: Synthesizing Ecology, November 2011, http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0706.2011.20174.x/abstract
Warren, R. J. and M. A. Bradford. 2010. The shape of things to come: woodland herb niche contraction begins during recruitment in mesic forest microhabitat. Proceedings of the Royal Society B, doi:10.1098/rspb.2010.1886.
Warren, R.J, and M.A. Bradford. 2010. Seasonal climate trends, the North Atlantic Oscillation and salamander abundance in the southern Appalachian mountain region. Journal of Applied Meteorology and Climatology. 49:1597-1603.
Theses and Dissertations
Warren, Robert J.. 2007. Linking Understory Evergreen Herbaceous Distributions and Niche Differentiation Using Habitat-Specific Demography and Experimental Common Gardens. Ph.D. Dissertation. Athens, GA: University of Georgia