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United States Department of Agriculture (USDA) 2013

Invasive Species Assessment and Control to Enhance Sustainability of Great Basin Rangelands

Invasive Species Great Basin

United States Department of Agriculture (USDA) Research, Education & Economics Information System (REEIS)

Titre : Invasive Species Assessment and Control to Enhance Sustainability of Great Basin Rangelands

Identification : 2060-13610-001-00

Pays : Etats Unis

Durée : Jun 03, 2013 à Jun 02, 2018

The Great Basin is the largest North American desert covering more than 50 million hectares. Major vegetation types in the Great Basin include : salt desert shadscale/greasewood, sagebrush/bunchgrass and mountain shrublands, pinyon/juniper woodlands, subalpine forests, and alpine tundra. The region has extremely variable climate both spatially and temporally and a complex mixture of public and private land ownership. Ranching, mining, and recreation form the basis of rural economies. Over 20% of Great Basin ecosystems have been significantly altered by invasive plants. This land conversion has resulted in dramatic reductions in forage availability, wildlife habitat, and biodiversity, has increased wildfire frequency and intensity, and altered the hydrologic cycle.
Critical research needs addressed in this project are : (1) ecology and control of invasive weeds, (2) rehabilitation of degraded rangelands, (3) maintaining/enhancing healthy rangelands, and (4) quantifying the impact of management practices. Objective 1. Assess and quantify ecological conditions and biotic processes that maintain healthy rangelands, improve forage production, and enhance recovery of degraded sagebrush, and pinyon/juniper woodlands under uncertain climatic conditions in the Great Basin. • Sub-objective 1.1 : Expand the ‘genetic toolbox’ to allow us to determine how the reproductive ecology of invasive annuals affects the structure and function of selected Great Basin ecosystems. • Sub-objective 1.2 : Determine mechanisms underlying the expansion of native western juniper (Juniperus occidentalis) woodlands. • Sub-objective 1.3 : Determine how cheatgrass invasion and climate change interact with one another to affect the structure and long-term persistence of sagebrush (Artemisia tridentata ssp.) populations. Objective 2. Assess and quantify interactions between annual grasses and fire on watershed processes and ecosystem services under uncertain climatic conditions. Objective 3. Develop and transfer innovative management approaches and technology for conserving and rehabilitating sagebrush, pinyon/juniper woodlands, and salt desert shrublands to meet natural resource and agricultural production goals. • Sub-objective 3.1 : Mechanistically understand how intact perennial grass communities resist invasion by annual grasses, especially cheatgrass. • Sub-objective 3.2 : Provide management guidelines and transferable technologies to our stakeholders for establishing and enhancing native and introduced grasses, forbs, and shrubs in Great Basin ecosystems. Objective 4. Develop decision support tools for USDA to assess impact of type, location and number of management practices required to meet conservation and agricultural production goals nationwide. • Sub-objective 4.1 : Enhance RHEM, KINEROS2, APEX, and SWAT models for assessing hydrology and erosion responses associated with management of disturbed vegetation states and transitions occurring on sagebrush-steppe ecological sites. • Sub-objective 4.2 : As part of a national assessment, quantify soil loss on western rangelands.

Présentation : USDA

Page publiée le 3 novembre 2015, mise à jour le 21 novembre 2017