Treesearch

Spawning and rearing habitat for anadromous fish is the dominant use of Jackson Demonstration State Forest's (JDSF) many miles of streams. Both coho (silver) salmon and steelhead migrate from the ocean up our rivers in the fall and winter to spawn. About 90 miles of the Forest's streams have been classified as habitat for these fish.

Mike Napolitano has written a short paper on this subject as part of his Master's degree work in the Geology Department at Humboldt State University. Mike has produced a "sediment budget" for the North Fork, and took past logging history into account in his work. Francis Jackson is a long-time resident of the Mendocino area and an expert on its history and logging operations. He explained to Mike how the old growth was harvested here.

Coarse woody debris (CWD) contributes to high quality habitat for anadromous fish. CWD volume, species, and input mechanisms was inventoried in North Fork Caspar Creek to assess rates of accumulation and dominant sources of CWD in a 100-year-old second-growth redwood (Sequoia sempervirens) forest. CWD accumulation in the active stream channel and in pools was studied to identify linkages between the forest and fish habitat. CWD accumulates more slowly in the active stream channel than on the surrounding forest floor. Of CWD in the active channel, 59 percent is associated with pools, and 26...

Incubating salmonid eggs in streambeds are often threatened by deposition of fine sediment within the gravel. To relate sedimentation of spawning gravel beds to sediment transport, infiltration of fine sediment (

Vegetation can reduce the cooling loads of buildings in hot arid climates by modifying air temperature, solar heat gain, longwave heat gain, and heat loss by convection. However, savings from reduced mechanical cooling may be offset by increased irrigation water costs. In this study, three similar model buildings were constructed and surrounded with different landscapes: turf, rock mulch with a foundation planting of shrubs, and rock mulch with no plants. Irrigation water use and electricity required to power the three room-sized air conditioners and interior lights were measured for two...

Our purpose is to use certain ecological measures, commonly adopted for understanding natural forest populations, to describe and compare street tree populations. Street trees compose only about 10-20 percent of the urban forest, hut there are sufficient data on these populations to apply certain measures of structure and to interpret the results. We used inventories from 22 U.S. cities to compare patterns in species and age composition, stocking levels, and growth forms. From this we infer trends toward greater species diversity and smaller tree size,· these trends are discussed in terms...

Fire managers across the nation are confronting the rapidly developing problem created by movement of people into wildland areas, increasing what has been termed the wildland-urban interface. The problem is very complex from the standpoint of fire planning and management. To plan and manage more effectively, fire managers should identify three types of interface areas, each with its own unique set of demographic factors, local land use, and fire protection problems. By examining and understanding how future trends will affect fire protection tactics and strategy in each of the interfaces,...

A relatively small number of forest fires are responsible for a very high proportion of the total damage. The proportion due to the fraction p of largest fires, when plotted against p, is a measure of variability of fire sizes that is especially sensitive to the important extreme events. We find the theoretical form of the plot for several commonly used distributions and show how the results can be used in the analysis of empirical plots from actual fire size distributions. Some simple graphical methods are suggested for the fitting of truncated Pareto and lognormal distributions to...

Residential encroachment into wildland areas places an additional burden on fire management activities. Prevention programs, fuel management efforts, and suppression strategies, previously employed in wildland areas, require modification for protection of increased values at risk in this interface area. Knowledge-based computer systems are being investigated as knowledge management tools for the organization, synthesis, and application of information pertinent to fire science utilization. Many such systems contain expertise which has been captured from human experts and symbolically...