Treesearch

All people recreate. Most of us read book and/or magazines, take walks, watch television, tend gardens. Some people enjoy high-risk activities, such as bungee jumping, others prefer to participate in karate at the local boys' club or bingo at the local senior center, while others prefer family-oriented leisure adivities such-as miniature golf. Whatever the leisure activity and however the leisure profession delivers that service to the public, it is necessary for leisure professionals to think about who they serve. This chapter focuses on leisure services for ethnic and racial groups. Not...

Abstract: One of the most puzzling aspects of the worldwide decline of amphibians is their disappearance from within protected areas. Because these areas are ostensibly undisturbed, habitat alterations are generally perceived as unlikely causes. The introduction of non-native fishes into protected areas, however, is a common practice throughout the world and may exert an important influence on amphibian distributions. We quantified the role of introduced fishes (several species of trout) in the decline of the mountain yellow-legged-frog (Rana muscosa) in California’s Sierra Nevada through...

In a drainage network, sediment is routed through a linked series of channel/valley segments (alluvial reservoirs) that are distinguished from their neighbors by their capacity to store and transport sediment.

Spending on postfire emergency watershed rehabilitation has increased during the past decade. A west-wide evaluation of USDA Forest Service burned area emergency rehabilitation (BAER) treatment effectiveness was undertaken as a joint project by USDA Forest Service Research and National Forest System staffs. This evaluation covers 470 fires and 321 BAER projects, from 1973 through 1998 in USDA Forest Service Regions 1 through 6. A literature review, interviews with key Regional and Forest BAER specialists, analysis of burned area reports, and review of Forest and District monitoring reports...

The primary purpose of this chapter is to describe aquatic ecosystems within the redwood region and discuss related management and conservation issues. Although scientists from many disciplines have conducted research in the redwood region, few comprehensive interdisciplinary studies exist (but see Ziemer 1998b) and no regionwide overview or synthesis of the aquatic systems in the redwoods has been published. Private ownership of most of the region has limited access and, therefore, scientific study in many areas. Fortunately, a large body of applicable science exists on riparian and...

Mean expected heterozygosity at 33 isozyme loci decreased with latitude from 0.193 near the southern extreme of Coulter pine's range to 0.107 at its northern extreme. This decrease was paralleled by a loss of alleles north of the Peninsular Ranges of southern California. Fiftenn alleles dropped out along the roughly linear range, at points coincident with large gaps in the species' disturbution. The pattern may reflect a cascading series of founder events as Coulter pine nvaded the Transverse Ranges and the South Coast Ranges from Pleistoncen refugia. Alleles were not replaced following...