Her research program is aimed at understanding what drives biological diversification, particularly at the level of populations and species. She uses islands of known age and isolation to assess the combined temporal and spatial dimension of biogeography and determine patterns of diversification, adaptive radiation, and associated community assembly with a focus on spiders and insects. Most of her work has been in the Hawaiian Islands, though she has also worked in French Polynesia, Fiji, Pohnpei, and Kosrae. Themes include adaptive radiation and community assembly on islands with emphasis on patterns of repeated evolution of similar forms, the rate of species accumulation and approach to equilibrium within an island system, and mechanisms of dispersal to the islands. Most of her work has been on spiders, in particular species in the genus Tetragnatha. She also works on the evolution of diversity within species, with the primary focus here on color polymorphism in the Hawaiian Happy face spider which has evolved the same color polymorphism independently on different islands, and the research aims to uncover the molecular basis for the modification. She currently has a large program examining the importance of priority, sequence, abundance, and interaction strengths in determining how biological communities develop, and how this might render them resilient to intrusion by non native species.
Science communication
She led "Exploring California Biodiversity", a National Science Foundation -funded museum and field-based outreach program focused on graduate fellows and high-school/middle-school students in minority-dominated urban schools in the Bay Area. The project forged connections between the university and the surrounding community, enriching K-12 science education, and training graduate students to be better communicators of science. Prior to moving to UC Berkeley she was part of an effort for Using Hawaii’s Unique Biota for Biology Education, an NSF program that worked with underrepresented Pacific Island students. She also led or co-led several programs to encourage participation of underrepresented minorities in higher education, including an NSF-funded Undergraduate Mentoring in Environmental Biology program that encouraged Pacific Islander undergraduates to undertake field and laboratory research in biology. She was awarded NSF’s Presidential Award for Excellence in Science, Mathematics, and Engineering Mentoring in Nov 2005.