Treesearch

Invasions of non-native brook trout (Salvelinus fontinalis) have the potential for upstream displacement or elimination of bull trout (Salvelinus confluentus) and other native species already threatened by habitat loss. We summarized the distribution and number of bull trout in samples from 12 streams with and without brook trout in central Idaho and used hierarchical regression analysis to consider whether brook trout have displaced bull trout along gradients of temperature and elevation. Brook trout generally were observed in higher numbers downstream of bull trout. Brook trout presence,...

The Hispanic period of Arizona and New Mexico spans roughly 320 years beginning in the mid-16th century with the arrival of Spanish explorers and culminating with the ratification of the Gadsden Purchase in June 1854. This paper provides an overview of exploration, settlement and land use within and adjacent to the Borderlands during this time. From a review of historic documents, I will provide a general history and present information on Borderland ecology. The earliest descriptions of the environment are often brief and anecdotal, but of sufficient detail, in some instances, to permit...

This proceedings is a compilation of 24 papers that were presented at the regional meetings of the forest and conservation nursery associations in the United States in 2005. The Western Forest and Conservation Nursery Association meeting was held at the Yarrow Resort Hotel and Conference Center in Park City, UT, on July 18 to 20. The meeting was hosted by the Utah Division of Forestry, Fire, and State Land, Lone Peak Nursery. Morning technical sessions were followed by field trips to restoration projects on the middle reach of the Provo River, McAffee Hill, and Dry Canyon, as well as tours...

The development of landscape ecology has stressed out the importance of spatial and sequential relationships as explanations to forest stand dynamics, and for other natural ambiences. This presentation offers a specific design that introduces spatial considerations into forest planning with the idea of regulating fragmentation and connectivity in commercial forest stands when these stands are subject to silvicultural regimes for conversion to a condition similar to pristine. El Llanito, a group of forest tracts privately owned in Atenguillo, Jalisco, Mexico, is under a forest plan that...

There is currently no spatial wildfire spread and growth simulation model used commonly across New Zealand or Australia. Fire management decision-making would be enhanced through the use of spatial fire simulators. Various groups from around the world met in January 2006 to evaluate the applicability of different spatial fire spread applications for common use in both New Zealand and Australia. Developers and researchers from Canada, the United States, and Australia were invited to apply Prometheus, FARSITE, and other similar models to New Zealand and Australian wildfires in grass, scrub,...

Systematic archaeology in the Malpai Borderlands begins with D. D. Gaillard's (1896) map of the elevated Cloverdale Playa beachline in the San Luis Valley. During his involvement with the U.S.-Mexico International Border Survey, Gailard was drawn to this feature by local ranchers' reports of a massive Native American dam. Familiar with the scale of prehistoric irrigation in the Phoenix Basin, he accepted the raised beachline as evidence of a massive water control construction and reported his findings in the American Anthropologist. The dam was almost immediately recognized as a prominent...

The Landscape Fire and Resource Management Planning Tools Prototype Project, or LANDFIRE Prototype Project, originated from a recent mapping project that developed a set of coarse-scale spatial data layers for wildland fire management describing fire hazard and ecological status for the conterminous United States (Hardy and others 2001; Schmidt and others 2002; www. fs.fed.us/fire/fuelman). Schmidt and others (2002) used linear succession transition pathways to estimate vegetation conditions that occurred on historical landscapes represented by combinations of land cover types and structura...

Fuel treatments are being widely implemented on public and private lands across the western U.S. While scientists and managers have an understanding of how fuel treatments can modify potential fire behavior under modeled conditions, there is limited information on how treatments perform under real wildfire conditions in Sierran mixed conifer forests. The Bell Fire started on 9/22/2005 on the Plumas National Forest, CA. This fire burned upslope into a 1-year old, 390-acre mechanical fuel treatment on private land. Prior to impacting the fuel treatment, the main fire ignited spot fires 400...

The Lower Rio Grande Salt Cedar Control Project treated 7,648 acres of monotypic Tamarisk (Salt cedar) in riparian areas along the Rio Grande in Socorro, Sierra, and Dona Ana Counties in New Mexico. We contracted North Star Helicopters, Inc. to do aerial treatment of these Salt cedar stands. The biggest issue in doing this treatment was the presence of the Southwestern Willow Flycatcher, an endangered bird species that is now nesting in Salt cedar. For this project to be undertaken, we had to ensure the USFWS that no treatment would occur within the ¼-mile buffer radius of the Southwestern...

A spatial model is presented to explain the concentration of heavy metals (Fe, Cu, Zn, Ni, Cr, Co and Pb), in the soils around the industrial complex near the Port of Veracruz, Mexico. Unexpected low concentration sites where then tested to detect woody plant species that may have the capability to hiperacumulate these contaminants, hence having a potential for dendroremediation. The study case circumstances are conducive to test this hypothesis because of the radial nature of the industrial sprawl, and the rural surroundings, where low presence of heavy metals is expected. Contaminants...