OOS 38
Seeds of Evolution: Using Resurrection Ecology and the Project Baseline Collection to Understand Responses to Anthropogenic and Natural Change

Wednesday, August 12, 2015: 8:00 AM-11:30 AM
315, Baltimore Convention Center
Julie R. Etterson, University of Minnesota-Duluth
Steven J. Franks, Fordham University; and Susan Mazer, University of California, Santa Barbara
Mike Sorenson, University of Minnesota
In this session, we will discuss an experimental approach called “resurrection ecology” that provides a rare glimpse into temporal and spatial dimensions of evolution in the wild in response to natural and anthropogenic change. Evolutionary change can be directly observed if ancestors are recoverable or fortuitously available in storage such that they can be revived and compared side-by-side with their contemporary descendants in a common environment. This “resurrection approach” is a powerful way to study evolution and has been applied to propagules that have been recovered naturally (e.g. seeds preserved in frozen tundra soils, dormant eggs in lake sediments) and fortuitously stored by investigators (e.g. seed banks, bacteria). Here we present resurrections studies and introduce a new research seed bank, Project Baseline, that will greatly expand opportunities to conduct resurrection studies in the future. In this first section of this organized session, presenters will discuss the development of resurrection ecology and provide case studies of how this approach has been used to document evolution in action for flowering phenology, competitive ability against an invasive species, and adaptation to a novel environment. Presenters will describe how combining the resurrection approach with quantitative and molecular genetic techniques allows unambiguous documentation of evolutionary change, while also facilitating efforts to dissect underlying mechanisms. In the second section, will focus on current and future studies based on a new seed collection that will accessible to the scientific community, called Project Baseline. This collection provides a well-designed time capsule of seeds that will enable future investigators to document microevolution during a period of rapid environmental change. Project Baseline collections are particularly valuable because they span latitudinal, longitudinal, and elevation gradients for diverse species that occur in different habitats and differ in life history. Collections have also been made from multiple species at the same site to permit future studies of coevolutionary dynamics among community members. We expect that this resource will foster collaborations elucidating evolution in natural populations. The session is conclude with a fundamental problem with resurrection studies which is that surviving propagules are not likely to represent an unbiased sample of the ancestral gene pool. This problem can be minimized if propagules are systematically collected and stored using best practices rather than fortuitously recovered from nature. We will discuss the potential consequences of this issue as it pertains to wild-collected material and how we are studying these effects in the Project Baseline seed bank.
8:00 AM
 Using resurrection experiments to illuminate multiple dimensions of evolution
Steven J. Franks, Fordham University; Jennifer J. Weber, Fordham University; Niamh B. O'Hara, Fordham University
8:20 AM
 Evolution in action under global warming: Revisiting Israeli wild cereal populations after 28 years
Fu Yong-Bi, Government of Canada; Eviatar Nevo, Institute of Evolution; Tomas Pavlcek, Institute of Evolution; Avigdor Beiles, Institute of Evolution; Souad Khalifa, Institute of Evolution; Mordechai Tavassi, Institute of Evolution
8:40 AM
 Eutrophication increases cladoceran dormant egg production and sexual activity: Implications for geospatial dispersal and hybridization
W. Charles Kerfoot, Michigan Technological University; John Robbins, NOAA Great Lakes Environmental Research Laboratory
9:00 AM
 A resurrection experiment reveals rapid evolution in an experimentally introduced population of Brassica rapa
Michael R. Sekor, Fordham University; Steven J. Franks, Fordham University
9:20 AM
 Project Baseline: A new research seed bank for the scientific community that greatly expands opportunities to use the resurrection approach
Julie R. Etterson, University of Minnesota-Duluth; Steve Franks, Fordham University; Susan Mazer, University of California, Santa Barbara; Nicole Soper Gorden, University of Minnesota Duluth; Heather Schneider, University of California, Santa Barbara; Jennifer J. Weber, Fordham University; Katharine J. Winkler, University of Minnesota; Arthur Weis, University of Toronto
9:40 AM
9:50 AM
 Geographic variation as a proxy for climate change: Forecasting evolutionary trajectories from species differentiation and genetic covariance
Susan Mazer, University of California, Santa Barbara; Heather Schneider, University of California, Santa Barbara
10:10 AM
 The role of ex situ seed banks in studies of temporal variation in natural populations
Christina Walters, USDA-ARS; Christopher Richards, USDA-ARS