HR: 1340h
AN: H53B-1234    [Abstracts]
TI: The relative importance of headwater streams, tributary junctions, and floodplains to salmonid productivity and diversity
AU: * Pess, G R
EM: george.pess@noaa.gov
AF: NOAA Fisheries, NWFSC 2725 Montlake Blvd East, Seattle, WA 98112, United States
AU: Beechie, T J
EM: tim.beechie@noaa.gov
AF: NOAA Fisheries, NWFSC 2725 Montlake Blvd East, Seattle, WA 98112, United States
AB: Recent literature has focused on the ecological importance of headwater streams, tributary junctions, and large river floodplains as dynamic and important hot spots of aquatic ecosystem productivity and diversity. Yet few studies attempt to address the relative importance of such network components at the watershed scale (>103 km2) to biological productivity and diversity. We examine the relative importance of each of these attributes to salmonid productivity and diversity. Specifically we compare and contrast the role of headwater streams, tributary junctions, and floodplains to salmonid life-history diversity and multiple species productivity. Preliminary results suggest that all three attributes are critical to specific life-histories and species. Aggregate life-history and species diversity increases with increasing drainage area. Lastly, evidence from several Pacific Northwest regions also suggest that life-history diversity and productivity is sustained by asynchronous cycles of high and low productivity among populations, and by migration across multiple, adjacent watersheds.
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 1813 Eco-hydrology
DE: 1820 Floodplain dynamics
DE: 1825 Geomorphology: fluvial (1625)
SC: Hydrology [H]
MN: 2007 Fall Meeting