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General Technical Reports

Presence of the introduced genus Tamarix has been a perplexing problem for decades along rivers of the southwestern States. It is clearly an invasive species occurring along most perennial, ephemeral, and intermittent drainages of the Southwest including rivers, small streams, and normally dry washes.
Sustainability science “transcends the concerns of its foundational disciplines and focuses instead on understanding the complex dynamics that arise from interactions between human and environmental systems” (Clark 2007: 1737).
This chapter explores the historical use and application of the term “outdoor recreation” as an organizing theme for sustainable public land management planning. We suggest that agencies need a more encompassing concept and approach to management involving people—one that recognizes the variety of connections that people have with natural and cultural landscapes, whether for leisure, lifestyle, livelihood, or health.
Multiple research and management partners collaboratively developed a multiscale approach for assessing the geomorphic sensitivity of streams and ecological resilience of riparian and meadow ecosystems in upland watersheds of the Great Basin to disturbances and management actions. The approach builds on long-term work by the partners on the responses of these systems to disturbances and management actions.
The 2020 RPA Assessment includes climate change as a driver affecting natural resources on forests and rangelands in the United States. This publication describes the process used to select the scenarios, climate models, and climate projections that will be used to project renewable resource conditions 50 years into the future.
The photoload technique provides a quick and accurate means of estimating the loadings of six wildland fuel components including 1 hr, 10 hr, 100 hr, and 1,000 hr downed dead woody, shrub, and herbaceous fuels.
The Resources Planning Act (RPA) Assessment uses a combination of land use and land cover data to evaluate trends in the United States land base and project future changes. This publication describes how the RPA Assessment uses the National Resources Inventory, National Land Cover Database, and Forest Inventory and Analysis to support analyses of forest trends.
Burn severity is the ecological change resulting from wildland fires. It is often mapped by using prefire and postfire satellite imagery and classified as low, moderate, or high. Areas burned with high severity are of particular concern to land managers and others because postfire vegetation, soil, and other important ecosystem components can be highly altered.
To inform future restoration efforts, we reviewed the known effects of fire and habitat management and restoration on hummingbirds in four key habitat types in North America.
The density of mesquite (Prosopis spp.) and other woody species has increased on desert and semidesert grasslands in the southwestern United States. This increase in woody species has been associated with the decline of native herbaceous plants and a loss of biological diversity and productivity. There have been numerous attempts to reverse this situation.

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