IGN 17
Ecology and Management of Source-Sink Dynamics

Friday, August 14, 2015: 10:00 AM-11:30 AM
345, Baltimore Convention Center
Elizabeth E. Crone, Tufts University
Erica Fleishman, University of California, Davis
John Hall, Strategic Environmental Research and Development Program
Thirty years ago, the introduction of source-sink theory changed the way ecologists think about species distributions: Specifically, source-sink theory means that species occur in unsuitable habitat types (sinks) due to movement from suitable habitat patches (sources). In principle, inferences about the ecology and management of populations should be informed by an understanding of the extent to which interacting populations function as sources or sinks. Nonetheless, ecologists still routinely infer habitat suitability from species occurrence and/or abundance, without considering the landscape context. In part, this discrepancy reflects the difficulty of measuring the joint effects of movement and demography in practice. This session will address novel and integrated applications of ecological theory, modeling, and empirical research to inform our understanding of source-sink dynamics at local, intermediate, and regional extents. We will showcase empirical studies investigating the source-sink status of populations of three major taxonomic groups – birds, amphibians, and butterflies – in major ecosystems throughout the United States, and discuss the implications of source-sink dynamics for management of these species. These case studies reveal a number of contrasting ways in which the general theory has been interpreted, and complementary ways in which different studies have related models to data for populations of species of management concern.
 How do sinks affect population persistence? Let me count the ways
Julie A. Heinrichs, University of Washington; Joshua J. Lawler, University of Washington; Nathan H. Schumaker, Oregon State University; Chad B. Wilsey, University of Washington; Darren J. Bender, University of Calgary
 An endangered songbird in central Texas: Source-sink population dynamics of the black-capped vireo
Lauren Walker, University of Washington; John Marzluff, University of Washington
 Thinking outside the black box: Novel approaches to measuring recruitment and source-sink dynamics in migratory species
Brandt Ryder, Smithsonian Conservation Biology Institute; Clark S. Rushing, Smithsonian Conservation Biology Institute; Tammy Wilbert, Smithsonian Conservation Biology Institute; Scott Sillett, Smithsonian Conservation Biology Institute; Peter Marra, Smithsonian Conservation Biology Institute
 Of beavers and salamanders
Raymond D. Semlitsch, University of Missouri; Brittany H. Ousterhout, University of Arkansas; Thomas L. Anderson, University of Missouri; William E. Peterman, University of Missouri
 Implementing source-sink models for management recommendations
William E. Peterman, University of Illinois; Raymond D. Semlitsch, University of Missouri; Thomas L. Anderson, University of Missouri; Brittany H. Ousterhout, University of Missouri; Dana Drake, University of Connecticut
 Sink to source to back again: Temporal dynamics of habitat quality for disturbance dependent species
Cheryl B. Schultz, Washington State University Vancouver; Joseph L. Smokey, Washington State University Vancouver; Norah Warchola, Washington State University Vancouver; Elizabeth E. Crone, Tufts University
 Was Icarus a rare butterfly?
Nick Haddad, North Carolina State University
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