Andrew KellerAndy

Lab Member Fall 2005

Currently a Biologist at Southern California Edison
andrew.keller@asu.edu

During his time as an honors student and undergraduate researcher with the Gerber lab, Andy’s independent research focused on the eastern North Pacific gray whale population and how drastic changes in its abundance relate to classification status under Endangered Species Act criteria. Abundance estimates from over twenty years of census counts were applied to a statistical probability model that projects possible growth rates of a given species, which could then be applied to ESA classification criteria for long-lived vertebrates. He also¬†conducted research to determine the effects of multiple cattle grazing regimes on the productivity and diversity of Arizona rangelands and the response of arthropod communities on varying levels of ungulate disturbance. The culmination of this research resulted in the ongoing collaboration between specific interest groups and a continued monitoring program of grazing on the Colorado Plateau.

Andy later completed his master’s degree at ASU in the Sabo ecology lab, studying invasive bullfrog populations and their influence on native frogs such as the Chiracahua Leopard Frog. He hoped to define critical habitat for imperiled frog species, which could be used in future reintroduction programs of amphibian species.