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(Most of the) Western Invasives Network sites

Boardman Conservation Area - OR, U.S.A.
The Boardman Conservation Area is located in north-central Oregon south of the Columbia River, and contains seven globally rare plant communities and the only viable population of Washington ground squirrels in Oregon. The greatest threats in the project area are agricultural development, noxious weeds, and wildfire.

Dugout Ranch - UT, U.S.A.
Dugout Ranch is located south of Moab, in San Juan County, Utah. The Ranch has been in agricultural production for over 100 years and continues today as a year-round cattle operation.

Great Sand Dunes - CO, U.S.A.
The Great Sand Dunes (GSD) conservation area is in the southeastern portion of the Closed Basin, a region with no surface water outlet, in the San Luis Valley of Colorado. This area, which is within the Southern Rocky Mountain Ecoregion, is one of the richest spots in Colorado in terms of biodiversity values.
Primary conservation strategies
Conceptual ecological model for the Great Sand Dunes sandsheet.
Alternative ecological model for the Great Sand Dunes.
Criteria for ranking viability of bison.
Criteria for ranking viability of stabilized sandsheet.

Headwaters Ranch - NM, U.S.A.
The Headwaters Ranch covers more than 155,000 acres, much of it within the Mimbres watershed, and an additional 15 river miles. The Conservancy created the ranch with partner Greer & Winston LLC in order to protect and restore watershed and stream condition in the headwaters of the Gila and Mimbres Rivers. The Headwaters Ranch includes portions of two Nature Conservancy portfolio sites, both within the Arizona-New Mexico Mountains Ecoregion: Mimbres River and Gila River.
Primary conservation and management strategies.
Conceptual ecological models: vegetation dynamics in pinyon-juniper, ponderosa pine and mixed conifer, and grassland and ponderosa pine systems.
Map: general overview
Overview of multi-scale monitoring program.
Overview of monitoring and research projects.

Lassen Foothills - CA, U.S.A.
The Lassen Foothills landscape encompasses 900,000 acres in the northeastern corner of California's Great Central Valley Ecoregion. It is dominated by vernal pool grasslands, vast blue oak woodlands, deeply carved canyons, and clear spring-fed creeks. The project area is remote and largely without roads; however, a weak cattle market, invasion of exotic weeds, and development pressure threaten this unique landscape.

Moses Coulee/Beezley Hills - WA, U.S.A.
The Moses Coulee/Beezley Hills landscape encompasses approximately 400,000 acres in north-central Washington, including a 200,000-acre core that protects high quality shrub-steppe and riparian habitats. A majority of the core area consists of native vegetation, although much of it has been significantly degraded. Most existing shrub-steppe and riparian vegetation is currently grazed by beef cattle. The Nature Conservancy owns or has easements on about 33,000 acres in the core area.

Owyhee Canyonlands - ID, U.S.A.
The Owyhee Canyonlands landscape, part of the Columbia Plateau Ecoregion, encompasses portions of southwestern Idaho, eastern Oregon, and northern Nevada. This region is sandwiched between the Great Basin to the south and the Snake River Plain to the north. The landscape covers more than 1.1 million acres.
Conservation and management strategies for three nested spatial scales.
Conceptual ecological model of Wyoming big sage/bluebunch wheatgrass.
Conceptual ecological model of juniper savanna system.
Ecological model of juniper savanna system with cheatgrass.
Map: Land ownership.
Foundation for development of a monitoring plan at multiple spatial scales.

White Sands Missile Range - NM, U.S.A.
White Sands Missile Range (WSMR), established in 1945 and administered by the U.S. Department of Army, comprises the largest single landholding in the United States, approximately 2 million acres. WSMR encompasses three mountain ranges (Organ, San Andres, and Oscura Mountains) and is one of the largest tracts of uninhabited/undeveloped land in the contiguous 48 states and in the Chihuahuan Desert Ecosystem.

Zumwalt Prairie - OR, U.S.A.
Zumwalt Prairie is the largest and highest-quality expanse of fescue bunchgrass prairie left in North America. It covers more than 220 square miles (146,000 acres) on the Joseph-Imnaha Plateau, east of Enterprise, Oregon, at elevations from 4,500 to 5,500 feet.
Primary grazing-related conservation strategies.
Conceptual ecological model for Zumwalt Prairie.
Map: General location.

Information about the WILN Workshops #1-2 and the upcoming Workshop #3 to be held in October 2005 in Grand Junction, Colorado. Information from past Aridlands Grazing Workshops #1-5 are also archived here.

Additional network resources
Web sites and documents related to, produced by, or supporting the WILN.

Updated February 2005
©The Nature Conservancy, 2003