 | Christopher (Kit) O’Connor | Forest management, effects of natural and anthropogenic disturbances on forest ecosystems, changing regimes of fire, insect outbreaks, and pathogens in response to climate, insects as indicators of forest health, forest ecology, integrated pest management, forest entomology. |
 | Geoffrey H. Palmer | Mammalian ecology, endangered species, and the impact of invasive species |
 | Gregory Pederson | Climate Change Impacts, Paleoclimate, Dendroclimatology, Dendroglaciology, Snow and Avalanche Reconstructions using Dendrogeomorphology, Mountain Ecosystems |
 | Karla Pelz Serrano | Wildlife conservation, conservation genetics and ecological restoration |
 | Mike Proctor | Practical aspects of environmental law and policy. |
 | David Quanrud | Water chemistry, water reuse/reclamation, wastewater treatment, emerging contaminants, artificial recharge, constructed wetlands, smart irrigation technology |
 | Adrian Quijada-Mascareñas | Biogeography, conservation genetics, molecular systematics, herpetology |
 | Sarah E. Rinkevich | Threatened and endangered species conservation, natural resource management on tribal lands |
| David L. Rogowski | Population and community ecology, conservation and management of aquatic resources, ecological statistics |
 | Alyssa Rosemartin | Avian conservation, science communication |
 | Alyssa Rosemartin | Web development, project management, avian conservation |
 | Philip C. Rosen | Herpetology, desert and aquatic vertebrate conservation biology, invasive species, amphibian epidemiology, urban ecology, roadway effects, ecological monitoring, natural history collections, biomes and landscapes, life history and evolutionary ecology, sociobiology, modern history. |
 | Patrick D. Royer | Ecohydrological dynamics in semi-arid woodlands, assessing spatial heterogeneity in piñon juniper and ponderosa ecosystems, land surface-atmosphere feedbacks in response to disturbance, near-ground solar radiation regimes and related effects on microclimate. |
 | George B. Ruyle | Rangeland ecology and management, Public Land Grazing, sustainable rangeland livestock production systems, conservation ranching |
 | Cecil R. Schwalbe | Herpetology, conservation biology of amphibians and reptiles, community and restoration ecology, ecology and control of invasive species, reptile and amphibian diseases, monitoring amphibian and reptile populations |
 | William Shaw | Wildlife conservation, conservation biology, human dimensions of natural resources |
| Matt Skroch | Terrestrial archipelagos, conservation policy and planning, climate change |
 | Steven E. Smith | Plant genetics and improvement, evolutionary ecology |
 | Gaspar Soria | Small-scale shell fisheries and aquaculture of marine bivalves; use of GIS tools for shellfish studies |
 | Adam Springer | Social-ecological systems, community-based resource management, watershed management, network analysis and spatial analysis |
 | Sonya Steckler | Avian ecology, avian conservation, behavioral ecology |
| Robert J. Steidl | Human impacts on wildlife populations, conservation biology, quantitative ecology |
 | Tyson Swetnam | Fire ecology, dendroecology, remote sensing, geographic information systems |
 | Tom Swetnam | Forestry, dendrochronology |
 | Joe Tabor | Epidemiology and ecology of valley fever (coccidioidomycosis), ethnopedology, water-harvesting |
