OOS 89
Evolutionary Responses to Directional Climate Change

Friday, August 14, 2015: 8:00 AM-11:30 AM
329, Baltimore Convention Center
Ned Fetcher, Wilkes University
James B. McGraw, West Virginia University
Ned Fetcher, Wilkes University
Faced with rapid, directional climate change, species adapted to a particular zone have to acclimate physiologically, migrate, evolve, or go locally extinct. Although range shifts are an important component of species response to changing climate, adaptive responses may be of equal importance. Locally adapted populations or ecotypes have been identified for many species and may constitute a reserve of genetic variation that will help species persist in the face of rapid climate change. However, genetic specialization is a double-edged sword, as reduced genetic variation within populations may limit in situ adaptive potential. This session will examine the potential and realized consequences of climate change for populations of plants and animals. As the climate changes, many locally adapted populations are likely to experience reduced fitness. For example, one potential consequence of local adaptation is adaptational lag, in which populations under selection due to a changing climate fail to adapt because of insufficient variation within the population or low gene flow from better-adapted populations. Another consequence may be reduced or enhanced gene flow, depending on the presence or absence of pollinators and dispersal agents. This session will present case studies that illustrate evolutionary responses of a diverse group of organisms, including herbaceous species, insects, fish, and birds. The studies encompass a similar variety of ecosystems, including Arctic tundra, eastern deciduous forest, grasslands, montane ecosystems and the ocean.
8:00 AM
 Evolutionary abilities and climate change in the sea
Malin L. Pinsky, Rutgers University; Stephen R. Palumbi, Stanford University; Molly Schumer, Princeton University
8:20 AM
 Plastic and evolutionary responses of butterflies to climate variability and climate change
Sarah E. Diamond, Case Western Reserve University; Joel G. Kingsolver, University of North Carolina at Chapel Hill
8:40 AM
 The double-edged sword of Eriophorum vaginatum ecotypes: Locally adapted, but overspecialized?
James B. McGraw, West Virginia University; Jessica B. Turner, West Virginia University; Cynthia C. Bennington, Stetson University; Milan C. Vavrek, Glenville State College; Gaius R. Shaver, Marine Biological Laboratory; Ned Fetcher, Wilkes University
9:00 AM
 Evolutionary responses to 17 years of simulated climate change in a species-rich grassland ecosystem
Raj Whitlock, University of Liverpool; Catherine H. Ravenscroft, Syracuse University; Andrew P. Askew, Syracuse University; J. Phil Grime, University of Sheffield; Jason D. Fridley, Syracuse University
9:20 AM
 Genetic differentiation and local adaptation of dominant grass along the climate gradient of the Midwest: Implications for climate change
Loretta Johnson, Kansas State University; Miranda M Gray, Cornell University; Paul St Amand, Kansas State University; Mathew Galliart, Kansas State University; Jacob Alsdurf, Kansas State University; Susan J Brown, Kansas State University; Jesse Poland, Kansas State University; Adam B. Smith, Missouri Botanical Garden; Karen A. Garrett, Kansas State University; Eduard Akhunov, Kansas State University; Alina Akhunova, Kansas State University; Nora M. Bello, Kansas State University; Hannah Tetreault, Kansas State University; Sara G. Baer, Southern Illinois University Carbondale; Brian R. Maricle, Fort Hays State University
9:40 AM
9:50 AM
 Hybrid zones: Windows on climate change
Scott A. Taylor, Cornell University; Erica Larson, University of Montana; Richard G. Harrison, Cornell University; Wesley Hochochka, Cornell Lab of Ornithology; Thomas White, Canterbury Christ Church University; Robert L. Curry, Villanova University; Irby J. Lovette, Cornell Laboratory of Ornithology
10:30 AM
 Genotypes of a tallgrass prairie species respond differently to drought, despite high plasticity within populations
Ava M. Hoffman, Colorado State University; Melinda D. Smith, Colorado State University
11:10 AM
 Consequences of local adaptation on extinction risk of American ginseng
Sara Souther, West Virginia Wesleyan College; James B. McGraw, West Virginia University