Western Washington University Western CEDAR Biology Faculty and Staff ubP lications Biology 1997 Host Plant Phenology and Dispersal by a Montane Butterfly: Causes and Consequences of Uphill Movement Merrill A. Peterson Western Washington University,
[email protected] Follow this and additional works at: https://cedar.wwu.edu/biology_facpubs Part of the Biology Commons, and the Entomology Commons Recommended Citation Peterson, Merrill A., "Host Plant Phenology and Dispersal by a Montane Butterfly: aC uses and Consequences of Uphill Movement" (1997). Biology Faculty and Staff Publications. 46. https://cedar.wwu.edu/biology_facpubs/46 This Article is brought to you for free and open access by the Biology at Western CEDAR. It has been accepted for inclusion in Biology Faculty and Staff ubP lications by an authorized administrator of Western CEDAR. For more information, please contact
[email protected]. Ecology, 78(1), 1997, pp. 167±180 q 1997 by the Ecological Society of America HOST PLANT PHENOLOGY AND BUTTERFLY DISPERSAL: CAUSES AND CONSEQUENCES OF UPHILL MOVEMENT MERRILL A. PETERSON1 Section of Ecology and Systematics, Corson Hall, Cornell University, Ithaca, New York 14853 USA Abstract. In the Wenatchee Mountains of central Washington State, populations of the lycaenid butter¯y Euphilotes enoptes occur patchily with their sole host plant, Eriogonum compositum (Polygonaceae). Nearly all courtship and adult feeding occur on the in¯ores- cences of this long-lived perennial. Furthermore, because females oviposit on in¯orescences and larvae feed only on ¯owers and developing seeds, the window of opportunity for exploiting this resource is narrow. I demonstrated that in¯orescence phenology varied according to the aspect and elevation of plant patches, and butter¯ies were most likely to occur in patches nearing full bloom.