Researchers

My research interest lies broadly in the processes by which biodiversity is maintained, and how invasive species change the balance of species in a community. One question I am investigating is the role of small mammals in driving – or mitigating – the impact of invasive buffelgrass (Pennisetum ciliare) on native Sonoran perennials. This drought tolerant, perennial African bunchgrass was planted extensively in the Sonoran Desert and other arid and semi-arid regions worldwide for cattle grazing and erosion control. It has since colonized native shrub land, leading to declines in native diversity and abundance of perennial vegetation. Small mammals foraging on seeds and vulnerable seedlings prefer stay under cover to avoid the owls that prey on them. If this dense invasive grass attracts them as a shelter, the rodents could reduce recruitment of new saguaros, palo verde, and other iconic perennial species.