研究领域

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Since 1979 I have been studying interactions between fruit-eating birds and the tropical plants whose seeds they disperse in Monteverde, Costa Rica. That project has expanded to include investigations of sex expression, population genetic structure, phenology, photosynthesis, stable isotopes as markers of seasonal cycles, and lifetime reproduction in a group of tree species in the family Lauraceae. The work of more than 120 biologists working in Monteverde was synthesized in a book published in 2000 by Oxford University Press. In 1986 I began a long-term study of Savannah Sparrows on Kent Island, New Brunswick, Canada, site of the Bowdoin Scientific Station. Our work on sparrows deals with the avoidance of inbreeding, the acquisition of song, incubation rhythms of experienced and inexperienced birds, post-fledging parental care, and mate choice. Most recently, with support from a National Science Foundation OPUS award, I have been collaborating with Erik Postma (Netherlands), Lukas Keller (Switzerland), and Céline Teplitsky (France) on quantitative genetics analyses of phenotypic variation in morphological, behavioral and life history traits across 12 generations. Other long-term research on Kent Island includes the reproductive ecology of insect-pollinated island plants, and the population biology of Tree Swallows.