Bat-plant pollination interactions in southern Thailand

The overwhelming majority of flowering plant species depend on animals for pollination, and such pollinators are important for the reproductive success of many economically and environmentally important plant species. Yet pollinators in the Old World tropics are relatively understudied, particularly paleotropical nectarivorous bats (Pteropodidae), and much is unknown about their interactions with night-blooming plant species. To better understand these bat-plant pollination interactions, I conducted fieldwork in southern Thailand for a total of 20 months, spread across three years. I examined the foraging times of pteropodid bat species (Chapter 1), and found that strictly nectarivorous species foraged earlier, and for a shorter duration, than primarily frugivorous species. I also studied year-long foraging patterns of pteropodid bats to determine how different species track floral resources across seasons (Chapter 2). Larger species capable of flying long distances switched diets seasonally to forage on the most abundant floral species, while smaller species foraged throughout the year on nearby plant species that were low-rewarding but highly reliable. To determine which pteropodid species are potentially important pollinators, I quantified the frequency and effectiveness of their visits to six common bat-pollinated plant taxa for an entire year (Chapter 3). The three strictly nectarivorous species were responsible for almost all pollination, but pollinator importance of each bat species varied across plant species. I further examined the long-term reliability of these pollinators (Chapter 4), and found that pollinator importance values were consistent across the three study years. Lastly, I explored mechanisms that reduce interspecific pollen transfer among bat-pollinated plants, despite having shared pollinators. Using a flight cage experiment, I demonstrated that these plant species deposit pollen on different areas of the bat’s body (mechanical partitioning), resulting in greater pollen transfer between conspecific flowers than heterospecific flowers (Chapter 5). Additionally, while I observed ecological and phenological overlap among flowering plant species, pollinators exhibited high floral constancy within a night, resulting in strong ethological separation (Chapter 6). Collectively, these findings illustrate the importance of understudied Old World bat pollinators within a mixed agricultural-forest system, and their strong, interdependent interactions with bat-pollinated plant species within a night, across seasons, and across years.

OPERA IN AMERICA: MUSIC OF, BY, AND FOR THE PEOPLE­: A PERFORMANCE DISSERTATION

Opera in America: Music of, by, and for the people is a study of the relationship between American popular culture and opera in the United States. Four performance projects demonstrate the on-going exchange between the operatic community-including its composer, singers, and patrons-and the country's popular entertainment industry with its broad audience base. Numerous examples of artistic cross pollination between lowbrow and highbrow music will illustrate the artistic and social consequences created by this artistic amalgamation. Program #1, By George! By Ira! By Gershwin!, is a retrospective of Gershwin's vocal music representing a blending of popular and serious music in both style and form. The concert includes selections from Porgy and Bess, a work considered by many musicologists as the first American opera. Program #2, Shadowboxer, is a premiere performance of an opera by Frank Proto and John Chenault. For this newly commissioned work, I serve as Assistant Director to Leon Major. Shadowboxer provides a clear example of opera utilizing popular culture both musically and dramatically to tell the true story of American hero and legendary boxer, Joe Louis. Program #3, Just a Song at Twilight, is an original theatrical music piece featuring music, letters, diaries, and journals of the Gilded Age, an era when opera was synonymous with popular entertainment. Special attention is focused on tum-of­ the-century singers who performed in both opera and vaudeville. Program #4 is a presentation of Dominick Argento's Miss Manners on Music and illustrates the strong relationship that can exist between opera and American popular entertainment. Originally conceived as a song cycle, I have staged the work as a one-act opera sung and acted by soprano Carmen Balthrop. This piece is based on the writings of pop icon and newspaper columnist Judith Martin, otherwise known as Miss Manners. All four performances are recorded in audio and video formats.