HR: 1340h
AN: A23C-1468    [Abstracts]
TI: Herbivory As A Driver For Biogenic Methanol Flux From North American Temperate Tree Species
AU: * Oikawa, P
EM: pyo6n@virginia.edu
AF: University of Virginia, Department of Biology P.O. Box 400328, Charlottesville, VA 22904, United States
AU: Lerdau, M
EM: mlerdau@virginia.edu
AF: University of Virginia, Department of Biology P.O. Box 400328, Charlottesville, VA 22904, United States
AU: Mak, J
EM: jemak@notes.cc.sunysb.edu
AF: SUNY at Stony Brook, Marine and atmospheric sciences Stony Brook University, Stony Brook, NY 11794, United States
AB: Ecological relationships of plants and herbivores have implications for biosphere-atmosphere interactions. For instance, plant monoterpene emission response to herbivory can significantly impact air quality /(Litvak et al. /(1999/) Ecol. Appl. 9/(4/):1147-1159/). Studies on biogenic methanol emission response to herbivory have observed significant methanol emissions directly following herbivore attack and even larger emissions 24hrs later /(Penuelas et al. /(2005/) New Phytol. 167:851-857/). We investigated gypsy moth defoliation impacts on methanol emissions in the abundant North American temperate tree species big tooth aspen Populus grandidentata. Specifically, we measured methanol emission response to herbivory on both short and long time scales at a field site in northern Michigan. Our results suggest herbivory can significantly increase methanol emissions on both short and long time scales. Unlike previous investigations, we did not observe methanol emissions 24hrs post-attack to be significantly higher than emissions detected directly following attack. When compared to mechanical wounding, herbivory did not elicit a quantitatively different methanol emission response in this species. These results suggest that herbivory in temperate forests may be an important driver for biogenic methanol flux and may therefore be helpful in improving models of methanol dynamics.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 0476 Plant ecology (1851)
DE: 0490 Trace gases
DE: 3322 Land/atmosphere interactions (1218, 1631, 1843)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting