Treesearch

This chapter offers information on the status, distribution by habitat, and basic life history of 94 species of mammals inhabiting the western Sierra Nevada. These data were drawn primarily from the literature, much of which consists of reports of studies conducted in areas outside of the Sierra Nevada. Additional information was provided by the field experience of the professional mammalogists involved with the project.

This chapter offers the most recent information available on the habitat relations of teh 26 speicies of amphibians and 27 species of reptiles know to occur in the west slope of the Sierra Nevada. nomenclature used follows that in the most recent literature for each species. the species are arrange in phylogenetic order and numbered in sequence, with prefix "A" (amphibians) or "R" (reptiles), for purposes of internal cross-referencing and computer access coding.

This chapter offers information on the status, distribution (by habitat type and seral stage), and basic life history for each of 208 species of birds that are found in the western Sierra Nevada. Many of the data came from the literature, altl)ough the professional ornithologists involved with this project drew upon extensive personal experience with birds in the Sierra Nevada. Knowledge of the details of bird life in the western Sierra Nevada is scanty at best. Pertinent data on life histories of many species simply were unavailable, while for a majority of those species for which data...

Estimation of the relative amount and the geographic distribution of genetically controlled variation is a central topic of tree resource management. Biochemical data from the analysis of forest tree enzyme variants provides a direct and precise measure of allele frequencies of tree genes.

The White-throated Sparrow (Zonotrichia albicollis) was thought to be polymorphic in breeding plumage, having distinct white and tan phases that are bimodal in distribution and independent of sex. Vardy (1971), however, submitted evidence that plumage type is determined primarily by age, sex, and molt cycle. We reexamined this question by measuring plumage characteristics on a quantitative scale with the Munsell system of color notation. Using techniques of numerical taxonomy, we examined immature and adult birds before and after prenuptial molt. Winter plumages were basically unimodal and...

A trial of 36 species of Eucalyptus near Concord, California, found species of sufficiently rapid growth and good survival to merit further screening. Species from western Australia and of the subgenus Monocalyprus all failed on the site. E. camaldulensis, E. dalrympleana, E. glaucescens, E. grandis, E. nitens, E. ovata, and E. viminalis were the species with best survival and growth.

Seedlings of 27 sources of western yellow pines, selected in climates typical of the species, were raised in a nursery in the western Sierra Nevada. Seedling top and root growth capacities were periodically assessed during fall and winter, and field survivals of outplanted seedlings were evaluated in different climates with summer drought. In the nursery, four distinct, innate seasonal patterns of root growth capacity were defined in ponderosa pine from within and outside California, and two distinct patterns were defined in Jeffrey pine. Below snow line in the western Sierra Nevada,...

Open-grown, pole-sized white firs defoliated by Modoc budwonn (Choristoneura viridis) in northeastern California in the years 1959-62 and 1973-75 suffered only minor growth reductions and topkilling compared with the effects that more protracted budworm outbreaks have had elsewhere on their conifer hosts. Growth index analysis indicated that the firs averaged a cumulative height growth deficit of 14.5 percent, or 34 cm (1.1 ft), over both outbreaks. Firs heavily defoliated during the 1973-75 outbreak were more frequently topkilled and consequently suffered larger height growth deficits....

A spacing study was started in 1961 to test the effects of four different spacings on the growth and development of saligna eucalyptus (Eucalyptus saligna Smith) trees in Hawaii. Spacings tested were 8 by 8 feet (2.4 m), 10 by 10 feet (3.0 m), 12 by 12 feet (3.7 m), and 14 by 14 feet (4.3 m). Plot trees were measured at ages 1, 2,5, 10, and 15 years. Measurements included d.b.h., total height, height to a 4- and 9-inch (10.2- and 22.9-cm) top (outside bark), and height to live crown. Board feet and cubic foot volumes were determined. After 15 years, trees 140 to 150 feet tall were common...