OOS 50 - Source Habitat Quality and Metapopulation Dynamics in Aquatic Ecosystems

Friday, August 12, 2011: 8:00 AM-11:30 AM
14, Austin Convention Center
Organizer: Benjamin Walther
Co-organizer: Pablo Munguia
Moderator: Benjamin Walther
Many marine and freshwater species inhabit a patchy world, where populations are connected to one another through the migration and dispersal of individuals at particular life history stages. A large amount of research has focused on the connectivity of metapopulations, both theoretically and empirically, in an attempt to address applied management issues such as the design of spatially explicit reserves. Much of this work has focused on quantifying the strength and direction of dispersal pathways. This research has included the use of radiotelemetry, chemical tagging, genetic assignment and coupled bio-physical modeling to identify origins and trajectories of individuals. In parallel, management strategies have focused on preserving spatial arrangement of habitats that will maximize population resilience. In order to identify those habitats that are of maximal importance, the influence of habitat quality on population dynamics of mobile species must be understood. This session will bring together scientists from both applied and basic research lines in an attempt to generate a synthetic approach that may inform management strategies that seek to preserve ecosystem services. The present proposal contributes to ecological understanding by incorporating variability of source populations in population dynamics and then extrapolating these advances into policy and management. Presentations will include case studies from marine and freshwater ecosystems including broad taxonomic groups (vertebrates and invertebrates) with mobile phases at different life histories (larval, juvenile, and adult). Source habitats may include those that serve as nurseries, refuges, or spawning grounds. We begin the session with theoretical approaches that highlight variation in quality of source habitats. Next, case studies from various taxonomic groups, including vertebrates and invertebrates, will be used as examples. These presentations will also address a range of different management perspectives. The last talk will summarize the objectives of the session and synthesize the knowledge gained and future challenges for studying spatially structured populations. While presentations will be diverse in terms of systems or approaches, all will address the central theme: how does the quality of the source affect population dynamics of mobile species?
8:00 AM
Structural heterogeneity in source-sink marine communities
Pablo Munguia, The University of Texas at Austin
8:20 AM
Identifying the factors controlling the persistence of endangered freshwater mussel populations in hydrologically altered systems:  A case study on the Upper Delaware River, USA
Kelly O. Maloney, USGS - Leetown Science Center; Randy M. Bennett, USGS - Leetown Science Center; William A. Lellis, USGS - Leetown Science Center
8:40 AM
Legacies of natal sources and dispersal histories: Implications for connectivity in a reef fish metapopulation
Jeffrey S. Shima, Victoria University of Wellington; Stephen E. Swearer, University of Melbourne
9:00 AM
Nearshore retention and population connectivity in upwelling regions: Estimating source strength and settlement in rocky shore metapopulations
Steven G. Morgan, University of California Davis; J. Wilson White, University of North Carolina, Wilmington; Sarah O. Hameed, University of California Davis; Seth H. Miller, University of California, Davis
9:20 AM
Going with the flow or staying close ot home? Linking habitat quality and population dynamics of Olympia oysters in San Francisco Bay
Andrew L. Chang, Smithsonian Environmental Research Center; Anna Deck, University of California Davis; Preston D. Malm, Sonoma State University; Karissa Willits, University of California Davis; Sarikka Attoe, Oregon State University; Jennifer L. Fisher, Oregon State University; Steven G. Morgan, University of California Davis
9:40 AM
9:50 AM
10:10 AM
Temporal and spatial variation of macroinvertebrate communities in a central Texas spring-fed river
Mara L. Alexander, U.S. Fish and Wildlife Service; Peter H. Diaz, U.S. Fish and Wildlife Service
10:30 AM
Detection and occupancy of anuran adults and tadpoles in wetland restorations
Michelle L. Hellman, Nebraska Fish and Wildlife Cooperative Research Unit, University of Nebraska-Lincoln; Craig R. Allen, University of Nebraska-Lincoln; Martin P. Simon, Benedictine College
11:10 AM
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