2004 UC Proceedings Abstract

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Mapping Fish Habitats in Lake Tahoe for Planning and Management
Track: Forestry, Wildlife, and Fisheries Management
Author(s): Josh Metz, Martin Herold, J. Romsos

High-spatial resolution multi-spectral imagery was used to map near-shore submerged substrate in Lake Tahoe. The goals of this project included determining the capability of IKONOS imagery for effectively discriminating different submerged substrate types around the lake near-shore zone, producing digital substrate maps and correlating them with observed fish habitat use data to derive fish habitat maps, improving the spatial extent and detail of existing fish habitat data using a consistent and repeatable method, and considering how best to incorporate new data into the planning and management process of the Tahoe Regional Planning Agency (TRPA). Four substrate types (boulder, mixed, sand, aquatic plants) and two fish habitat types (feed/cover, marginal) could be inferred in sufficient accuracy. A consistent method for future mapping efforts was developed for use in environmental monitoring. Finally, potential fish density distributions based on the substrate map and water depth/bathymetry information were derived by linking the remote sensing measurements with in-situ fish observations.

Josh Metz
Donald Bren School of Environmental Science and Management
2400 Bren Hall
UC Santa Barbara
Santa Barbara , CA 93106
US
Phone: 8058937044
E-mail: jmetz@bren.ucsb.edu

Martin Herold
University of California, Santa Barbara
Geography
1629 Ellison Hall
UC Santa Barbara
Santa Barbara , CA 93106
US
Phone: 8058934196
E-mail: martin@geog.ucsb.edu

J. Romsos
US Forest Service - Lake Tahoe Basin Management Unit
Ecosystem Conservation
35 College Dr.
South Lake Tahoe , CA 96150
US
Phone: 5305432745
E-mail: sromsos@fs.fed.us