Treesearch

We used the Nutrient Cycling Model (NuCM) to simulate the effects of various sulfur (S) and nitrogen (N) deposition scenarios on wilderness areas in Western North Carolina. Linville Gorge Wilderness (LGW) and Shining Rock Wilderness (SRW) were chosen because they are high elevation acidic cove forests and are located on geologic parent material known to be low in base cations and thus sensitive to acidic deposition. We used five sulfate (SO42-) and nitrate (NO3-) deposition scenarios to compare with the current (base case) deposition: Scenario 1, SO42- at 94 percent and NO3- at 95 percent...

Trabajos IndividualesEstas memorias resumen el resultado de un simposio diseñado para discutir los problemas actuales que confrontan las agencias con responsabilidad para la protección contra incendios forestales a nivel federal y estadual en los EE.UU., al igual que agencias en la comunidad internacional. Los temas discutidos en el simposio incluyen cambio climático e incendios forestales: realidad o ilusión?, teoría y modelos para la planificación estratégica de incendios, análisis económico y el manejo integral del fuego, incendios forestales y manejo sustentable de bosques, políticas...

An analysis of trees in the Chicago region of Illinois reveals that this area has about 157,142,000 trees with tree and shrub canopy that covers 21.0 percent of the region. The most common tree species are European buckthorn, green ash, boxelder, black cherry, and American elm. Trees in the Chicago region currently store about 16.9 million tons of carbon (61.9 million tons CO2) valued at $349 million. In addition, these trees remove about 677,000 tons of carbon per year (2.5 million tons CO2/year) ($14.0 million/year) and about 18,080 tons of air pollution per year ($137 million/year)....

One of the essential elements for a fire to occur is the flammable material. This is defined as the total biomass that has the ability to ignite and burn when exposed to a heat source. Fuel characterization in Mexican forest ecosystems is very scarce. However, this information is very important for estimating flammability and forest fire risk, fire behavior, environmental impact assessment and critical decision making related to fire management practices. The aim of this study was to determine the fuel load in a Eucalyptus sp. plantation, which has not been given any kind of management...

As provided for in the General Law on Sustainable Forestry Development, the Municipality of Villaflores has worked on a continuous basis since 2002 to reduce the damage caused by forest fires as part of its working agenda, in conjunction with Federal and State agencies and NGOs. The work plan has the following phases: a) Inter-agency coordination: participation of governmental agencies and NGOs; b) Pre-suppression: actions enabling the preparedness of resources (human, material and financial), highlighted by the establishment and operation of a Municipal Forest Fire Control Center; c)...

Algerian forest lands cover 4,115,908 hectares (ha), of which 2,413,090 (58%) ha are bush or maquis. Recent work has shown that forest fires are the main factor explaining (90%) degradation of Algeria forest lands at an annual rate of 45,000 to 50,000 ha. From 1985 to 2010 in 40 provinces of northern Algeria, 42,555 forest fires have burned a total of 910,640 ha. On average, 1,636 fires burn 35,024 ha of forest lands annually. The 1985 to 2010 period saw a general increasing trend in annual fire frequency for the area. As in the entire Mediterranean basin, forest fires in Algeria are...

The objective of this research was to characterize the spatial structure patterns of a Pinus hartwegii forest in the Sierra Madre Oriental, affected by a fire in 1998. Sampling was stratified by fire severity. A total of three fire severity classes (low, medium and high) were defined. Three sample plots of 40m x 40m were established for each severity. Variables obtained for all trees with a diameter at breast height (DBH) ≥ 5 cm in each plot were: DBH (cm) to 1.30 m, height (m), special location by recording the azimuth (°) and distance (m) from the center of the plot to each tree. A total...

Rainwater harvesting systems (RHSs) can be used to improve the efficiency of helicopter firefighting operations. To this end, RHSs need to be strategically located in areas with high wildfire occurrence to maximize their usefulness. In this study, spatial analysis was carried out to determine suitable sites for establishing RHSs intended for air attack operations in three municipalities (Chalco, Ixtapaluca and Tlalmanalco) located in the eastern part of the state of Mexico, Mexico. Five variables were used for site selection: wind speed, distance to roads, runoff, evaporation and wildfire...

The culture of fire in the context of climate change has become a complicated relationship between people and natural areas. The interaction between people and fire is not a new issue. The use of fire by humans in most aspects of life, especially in rural areas, together with rapid and haphazard growth of structures in wildfire-prone areas, has led to the owners and residents living there being less involved due to an urban conception of natural and forest areas. At the same time, rural areas have been decreasing and their populations aging due to migration to cities. Although the authoriti...

Urban growth worldwide has generated great concern in the planning of the different environments belonging to the wildland-urban interface. One of the problems that arise is the landscape treatment given to roads, which must not only comply with aesthetic and ecological principles, but also be functional, adding functions relating to forest fire prevention and control. The components for proper road functioning, such as slopes, right of ways, medians, signs, bridges and service stations, need appropriate landscape treatments to not only improve and conserve the site, but also to provide...