p^*"*^
r usas
EPA/600/C-05/005
THE SOUTHWEST REGIONAL GAP PROJECT:
PLANT COMMUNITIES OF NEVADA
William G. Kepner1, Todd D. Sajwaj2, Daniel T. Heggem1, and David F. Bradford1
HJ.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory,
Environmental Sciences Division, Las Vegas, Nevada 89119, University of Idaho, College of Natural Resources, Moscow, Idaho 83844
«,"*»•
OREGON
IDAHO
-
&ttZ3CL3R
^pM^antspfimsvnnvsenximm
V>
„!„„
Ecological Systems of Nevada
1 he Southwest
Regional Gap
Analysis Project used
contemporary (1999-
2001) Landsat 7 Enhanced
Thematic Mapper satellite im-
agery from three seasons, i.e.,
spring (leaf-on), summer (peak
greenness), and fall (leaf-off). The in-
* formation comprised 63 triplicate scenes
for the state of Nevada and they were com-
posited into biogeographically unique map-
ping units that span political boundaries of the
adjacent states. Vegetation mapping was conducted
at the "ecological systems" level of the National Veg-
etation Classification provided by NatureServe. The data
* set used to "train" the imagery contains over 17,500
ground-truth sites collected across the state, and it includes 73 ' .Panrui
natural and seminatural ecological systems. The funding to un-
A. dertake this project was provided by the national Gap Analysis Pro-
gram of the USGS-Biological Resources Discipline and the Landscape
Ecology Branch of the U.S. Environmental Protection Agency. Invalu-
able assistance was received from the U.S. Bureau of Land
Management/Nevada State Office and the Eastern Nevada Landscape Coali-
tion. This land cover map and other geospatial data for Nevada can be found
online at: http://www.epa.gov/nerlesdl/land-sci/gap.htm
5
.
------- |