Sierra Nevada Ecosystem Project (SNEP) is an assessment of the
entire Sierra Nevada ecoregion (California and western Nevada).
The study was requested by Congress in 1992, was completed in
June, 1996, and was funded by Congress and the U.S. Forest Service.
This ecosystem evaluation undertakes, as specifically requested
by Congress, a scientific review of late-successional forests,
key watersheds, and significant natural areas (e.g., areas with
sensitive species) on federal lands of the Sierra Nevada ecoregion,
and also broadly evaluates the entire set of Sierra Nevada ecosystems,
including their social, economic, and ecological components. The
overall goal of the Project is to provide an accurate ecosystem
assessment. This will enable managers to identify, measure and
monitor key structural components, functional processes, and ranges
of variability in order to manage these ecosystems for sustainability.
Biogeography Lab collaborated with SNEP to produce a Sierra Nevada-wide
assessment of the distribution and management status of widespread
terrestrial plant communities and vertebrate species. This analysis,
undertaken as part of the Gap Analysis of California, provided
1) digital distribution maps of plant communities and land management
units; 2) tabular summaries of the ownership and management status
of communities; 3) analyses to identify communities that are potentially
vulnerable based on their current management status; 5) and identification
of potential biodiversity management areas to reduce the vulneraility
FTP site for
UCSB-SNEP GIS Data is ftp://ftp.biogeog.ucsb.edu/pub/org/biogeog/data/snep
Lab produced two of the chapters in the final SNEP report. These
W., and D. M. Stoms, 1996. Sierran vegetation: A gap analysis.
Pages 671-689 in Sierra Nevada Ecosystem Project: Final Report
to Congress, vol. II, Assessments and scientific basis for management
options. Davis: University of California, Centers for Water and
W., D. M. Stoms, R. L. Church, W. J. Okin, and K. N. Johnson,
1996. Selecting biodiversity management areas. Pages 1503-1528
in Sierra Nevada Ecosystem Project: Final Report to Congress,
vol. II, Assessments and scientific basis for management options.
Davis: University of California, Centers for Water and Wildlands
We also presented
a paper on the BMAS model in 1996 which is also on-line:
L., D. M. Stoms, F. W. Davis, and B. J. Okin, 1996. Planning management
activities to protect biodiversity with GIS and an integrated
optimization model, in Proceedings of the Third International
Conference/Workshop on Integrating GIS and Environmental Modeling.
National Center for Geographic Information and Analysis, Santa
Barbara, CD and WWW.
about ordering or viewing the SNEP reports, for access to SNEP
GIS data sets, and to learn more about the project in general,
check at the California Environmental Resources Evaluation