HR: 08:45h
AN: B41A-02 INVITED     [Abstracts]
TI: The Interdependence of Surface and Subsurface Habitat Diversity
AU: * Poole, G C
EM: gpoole@eco-metrics.com
AF: Eco-metrics, Inc., 2520 Pine Lake Road, Tucker, GA United States
AU: * Poole, G C
EM: gpoole@eco-metrics.com
AF: Institute of Ecology, University of Georgia, Athens, GA United States
AU: O'Daniel, S J
EM: sodaniel@icess.ucsb.edu
AF: Confederated Tribes of the Umatilla Indian Reservation, 72329 Confederated Way, Pendleton, OR United States
AU: O'Daniel, S J
EM: sodaniel@icess.ucsb.edu
AF: Department of Geography & ICESS, University of California at Santa Barbara, Santa Barbara, CA United States
AU: Stanford, J A
EM: jack.stanford@umontana.edu
AF: Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT United States
AU: Woessner, W W
EM: gl_www@selway.umt.edu
AF: Department of Geology, University of Montana, Missoula, MT United States
AU: Boer, B R
EM: brian.boer@umontana.edu
AF: Department of Geology, University of Montana, Missoula, MT United States
AU: Arrigoni, A S
EM: asarrigoni@yahoo.com
AF: Department of Geography & ICESS, University of California at Santa Barbara, Santa Barbara, CA United States
AU: Mertes, L A
EM: leal@geog.ucsb.edu
AF: Department of Geography & ICESS, University of California at Santa Barbara, Santa Barbara, CA United States
AU: Ellis, B K
EM: Bonnie.Ellis@umontana.edu
AF: Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT United States
AU: Hauer, F R
EM: ric.hauer@umontana.edu
AF: Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT United States
AU: Lorang, M S
EM: mark.lorang@umontana.edu
AF: Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT United States
AU: Kimball, J S
EM: johnk@ntsg.umt.edu
AF: Flathead Lake Biological Station, Division of Biological Sciences, University of Montana, Polson, MT United States
AU: Kimball, J S
EM: johnk@ntsg.umt.edu
AF: Numerical Terradynamic Simulation Group, Dept of Ecosystem and Conservation Sciences, University of Montana, Missoula, MT United States
AU: Thomas, S A
EM: sat43@cornell.edu
AF: Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY United States
AB: Geomorphic structures and hydrologic dynamics shape the physical template of lotic ecosystems, both on the surface and within the hyporheic zone. While recent studies have described the importance of surface and subsurface habitat diversity, our ongoing field and modeling research projects are documenting the interdependence of channel and hyporheic habitat diversity along with the role of biological processes in responding and contributing to hydrologic complexity and habitat diversity in fluvial landscapes. Patterns of variation in both hydrologic flow paths and water temperature can be used to illustrate the interdependence of complexity and diversity in lotic and hyporheic environments, both of which are mediated by variation in stream geomorphology and discharge regime. For instance, our data suggest that flood-plain topography interacts with the discharge regime to determine the complexity of surface and hyporheic hydrology, which influences and is influenced by seasonal growth and senescence of vegetation. Flood-plain hydrology, in turn, drives patterns of surface water temperature, in both main-channel and lateral aquatic habitats. These results lead us to conclude that simplification of surface habitat can have substantive effects on subsurface habitat diversity, and vise versa.
DE: 1824 Geomorphology (1625)
DE: 1829 Groundwater hydrology
DE: 1860 Runoff and streamflow
DE: 1890 Wetlands
SC: Biogeosciences [B]
MN: 2005 Joint Assembly