Sadayappan K, Keen R, Jarecke KM, et al. Drier streams despite a wetter climate in woody-encroached grasslands. Journal of Hydrology. 2023;627:130388. doi:10.1016/j.jhydrol.2023.130388.

Nippert JB, McCulloh K, Wilcox K, O'Keefe K, Keen R, Chen A. Using root and soil traits to forecast woody encroachment dynamics in mesic grassland.; 2023. doi:10.2172/2248061.

O'Keefe K, Bachle S, Keen R, E. Tooley G, Nippert JB. Root traits reveal safety and efficiency differences in grasses and shrubs exposed to different fire regimes. Functional Ecology. 2022;36(2):368 - 379. doi:10.1111/fec.v36.210.1111/1365-2435.13972.