The study was concerned with lodgepole pine, Pinus contorta Douglas and Engelmann spruce, Picea engelmannii Parry, particularly in the southern interior of British Columbia. Classifications of the forests of the Province as well as distribution, silvics, effects of fire upon succession, forest associations, and productivity classes of the two species were described. Sample plots were located in the Interior Douglas-fir and Engelmann Spruce - Alpine Fir Biogeoclimatic Zones. Hohenadl's form factor was used to compute volume growth by individual decades from stem analyses. On 124 plots, 137 trees were collected for stem analyses, 108 saplings were used for height - age studies, 100 point samples were made for determining basal area and stand volume and several hundred heights as well as diameters and borings at breast height, were taken. Thirty-four stand variables were subjected to multiple correlation analyses, particularly in regard to forest associations and growth of height, diameter at breast height and volume of the two species. Simple regressions were used to estimate height growth of several species on similar sites, and to compare several methods of volume calculation. Trees of the same diameter at breast height grown in different competitive positions (open, moderate to dense, and suppressed), contained different volumes. The largest volume of individual trees was found with trees grown in moderate to dense competitive position. Individual young lodgepole pines had a faster increment of height, diameter at breast height, and volume, than Engelmann spruces. This trend remained the same in yield tables based on individual tree studies and constructed for stands of good (average site index 100 ft. at 100 years), medium (average site index 70 ft. at 100 years), and poor (average site index 50 ft. at 100 years) productivity classes. The mean annual increment of volume of stands culminated earlier in lodgepole pine than in Engelmann spruce. The periods required were (in brackets are shown attained average diameters at breast height, total heights and volumes per acre). In the good productivity class in lodgepole pine 40 years (8.3 in., 58 ft., 6,700 cu.ft.) and in Engelmann spruce 75 years (10.0 in., 80 ft., 6,000 cu.ft.); in the medium productivity class in lodgepole pine 60 years (6.5 in., 50 ft., 4,600 cu.ft.) and in Engelmann spruce 130 years (9.0 in., 84 ft., 5,100 cu.ft.); in the poor productivity class in lodgepole pine 85 years (5.3 in., 45 ft., 3,100 cu.ft.) and in Engelmann spruce 150 years (6.3 in., 66 ft., 3,400 cu.ft.). Yield table volumes per acre in lodgepole pine were larger than those of Engelmann spruce, in the good productivity class, to the age of 120 years, in the medium productivity class to 150 years, and in the poor productivity class for an undetermined period. Present and suggested future trends of utilization and management of stands of the two species were reviewed. Generally, forest management in British Columbia shows a trend toward more intensive forest utilization, due to the increasing demand for wood. Smaller diameter trees and "smallwood" stands will be more and more frequently utilized. Utilization of whole trees, highly mechanized "harvesting" and transportation as well as intensified management of forest stands will compensate for increasing costs due to utilization of smaller diameters. Under intensive management, lodgepole pine deserves special consideration. It is as well-suited for artificial establishment of stands by planting as Engelmann spruce, but should cost less. Its value for the woodworking industry is similar to that of Engelmann spruce. However, on a rotation of maximal mean annual increment, its volume yield per acre unit will be higher than that of Engelmann spruce, and it should yield a higher rate of return on invested capital. / Forestry, Faculty of / Graduate

The patterns and rates of forest regeneration on a critical wildlife winter range on the floor of the trench, known locally as Premier Ridge were examined in this study. A nearby western wall of the trench was also investigated to ascertain the effect of elevation on forest regeneration and understory productivity. Forest regeneration in a community which has remained unforested for several as years has pronounced effects on the floristic dynamics and productivity of the understory. On Premier Ridge the greatest floristic change was a rapid increase in pinegrass and a. corresponding decrease in the abundance of all other grass species as the forest regeneration progressed. Forbs varied widely in abundance while shrubs were slower to react to changes in the overstory. Similar trends were observed on Estella Mountain. Productivity of the grass component on the unforested sites was four times that of the forested sites. The production of forbs and some species of shrubs also declined as forest regrowth began. One species, bearberry, increased under light forest canopies. The reduction in productivity and the changes in species composition of-the understory which occur in regenerating forest communities, appear to be detrimental to foraging populations of wild and domestic ungulates. Cattle seem to prefer to graze the open, unforested areas, and as regeneration proceeds, the acreage which they will readily use diminishes. Since there have been few reductions in stock numbers to compensate for this range shrinkage, local overgrazing has become more widespread. The regrowth of the forest reduces the grass, both in terms of quality and quantity. This is the most important component in the diet of cattle and most of the wildlife species using the Premier Ridge area. In addition, bitterbrush, used in the summer by cattle and during the winter by big game species, is quickly eliminated by forest regeneration. Bearberry, which may be used by wildlife to some extent, increases under forest cover. This component does not approach in value or usefulness, the losses that the other components represent to grazing animals. The trees of the south and southwestern aspects are characterized by relatively slow growth rates. Forage production on these slopes is modest; if grazing animals are deemed desirable in the future economy of the East Kootenay, these areas should remain treeless. Growth rates are more favourable on the north and northeast aspects, which are less frequently used as foraging areas by winter wildlife, but may be used as shelter or bedding areas. / Land and Food Systems, Faculty of / Graduate

I offer some tentative thoughts on Sto:lo relations with the forest and, in turn, suggest how those relations may inform Sto:lo views on identity and culture. While highlighting the variety and complexity of Sto:lo attitudes toward the forest, I pay particular attention to those that appear contradictory. In so doing, I suggest that such "contradictions" are instead necessary antagonisms that spring from the constantly changing pressures to which the Sto:lo have been subjected, as well as from the ways in which they have struggled to cope with such pressures. More specifically, in pointing to Sto:lo attitudes towards forest work and forest conservation, I suggest that the Sto:lo have been forced and even encouraged to make claims to their identity that do not, and need not, conform with what is considered "traditional." In this way, my discussion is structured around the relationship between a sense of Sto:lo identity and the notion of cultural continuity, while aimed at highlighting the material as well as the intellectual realities behind that relationship. In a broader context, my discussion is aimed at reinforcing the need for more flexible examinations of Native identity; those that will highlight what it means to live in a modern Native culture, and what it means to be vulnerable to power. / Arts, Faculty of / Geography, Department of / Graduate

Increasing demands for the natural resources of British Columbia coastal forests have led to conflicts between resource users. In addition recent demand for intangible "non-economic" resources, such as outdoor recreation is creating added pressure upon the wildland resource base. The British Columbia Forest Service, although restricted to some extent by a narrowly-worded "wood production" statute, has attempted to resolve forest resource conflicts by administrative action such as the development of new contract provisions and logging guidelines. These alternatives can be effectively enforced against Crown licensees due to Crown control of most timber resources, but they are largely ineffective for the regulation of private timberland operations. Although private lands are not extensive, their harvest is substantial and they comprise a significant acreage in the rich coastal forest areas. The common law offers several potential causes of action which might be employed by the Forest Service to regulate logging operations on private timberlands, particularly with respect to impact upon fishery resources in coastal forest streams. The Forest Act could also be interpreted to authorize regulation of private logging operations. Litigation, whether civil or criminal, however, is not an optimum method of environmental management. It is expensive, time-consuming, extremely technical and remedies are generally post facto in character. / Law, Peter A. Allard School of / Graduate

Forest disturbances significantly affect snowmelt dominated watersheds. Given that snowmelt from mountain regions provides up to 80% of the annual stream ow in the North American west, disturbances in these watersheds will impact water availability for downstream users. This study used eld data from stand-scale studies to represent forest disturbances in a hydrological model in order to quantify the potential snow hydrology response to varying spatial extent of disturbance. The sensitivity of snow accumulation and ablation response increased with disturbance severity and extent of disturbance. Results may provide water resource management with a greater understanding of the potential impact on post-disturbance snowmelt runo ff. / xii, 135 leaves : ill. ; 29 cm

The forest industry is the most important economic activity in the Province of British Columbia, with half the families in the province depending directly or indirectly on the industry's $400 million annual payroll. Predictions of $1 billion worth of new capital investment materializing within the next five years provide a firm indication that the industry will retain this position of economic importance throughout the forseeable future. The growth of the forest industry has had a profound effect upon the settlement pattern of British Columbia, characterized principally by an extreme concentration of productive facilities, and hence of population, in the south-west of the province, and a thin diffusion of employment and population throughout the remainder. In this large hinterland the population is scattered throughout a myriad of camps, company towns and isolated settlements which are able to provide for their residents a minimum level of goods and services and a narrow range of opportunities for personal development and self-realization. Thus, for many thousands of workers and their families, employment in the forest industry involves denial of the opportunity to participate fully in the prosperous and variegated way of life which the industry has so materially assisted to create within the province. The Provincial Government has, to some extent, indicated an awareness of this condition, for the two declared objectives of its forest policies are the assurance of a perpetual yield of timber, and the establishment of prosperous permanent communities. Policies to ensure the fulfillment of the first objective have been thoroughly prepared, and conscientiously and competently applied. Policies to ensure the fulfillment of the second objective, on the other hand, are still lacking. The anticipated wave of new investment in the industry will produce significant changes in provincial settlement patterns, in the form of several new towns in hitherto undeveloped areas and of a re-structuring of communities in already established areas. If controlled by firm government policy, these changes could be directed toward the creation of a settlement pattern which would make available to the citizens of the province the highest level of goods, services and urban amenities which the province is capable of providing. In order to achieve this objective the developmental activities of the forest industry would have to be coordinated with those of all other agencies, both public and private, which are engendering urbanization within the province. Such coordination could only be achieved by the creation of a framework for developmental planning which would be province wide in scope, comprehensive enough to embrace all developmental action, and capable of accounting for regional variations. By establishing a Provincial Development Department at Cabinet level, with the portfolio being held by the Provincial Premier, a means would be provided for effectively initiating and controlling development on a comprehensive province wide basis. By establishing regional branch offices of the Provincial Development Department a means would be provided for the achievement of regional accountability. It would, be the responsibility of the Regional Development Offices to prepare regional development plans for the areas under their jurisdiction. Coordination of activity at the regional level would be assured through the establishment of a Regional Inter-departmental Committee consisting of the regional representatives of all government departments functioning within the region. By bringing the regional representative of the British Columbia Forest Service into the Regional Inter-departmental Committee, and by making all forestry development subject to the Regional Development Plans, developments within, the forest industry could be directed and controlled so as to make the maximum possible contribution to the realization of an optimum settlement pattern within each region. / Applied Science, Faculty of / Community and Regional Planning (SCARP), School of / Graduate

Industrial private forest landowners in British Columbia have traditionally viewed their forest lands as a raw material supply for their wood processing facilities. However, they are now experiencing social and political changes which are restricting the way their forests are managed. These changes have enormous implications for large forestry firms, such as Canadian Pacific Forest Products. A portion of their lands, the focus of this study, has been examined to assess the impact of these restrictions on traditional land use. In addition, non-timber values have been examined for their revenue generating potential. A study area was delineated near the community of Sooke, B.C. Fishing, hunting, deer farming and camping were assessed. In order to complete the analysis, the costs in terms of foregone timber values, were calculated under a number of different assumptions. The impact of changes in bare land values on decisions with respect to the non-timber values were also examined. A number of policy changes, both by the landowner and the various levels of government involved, are required to promote forestry with a renewed emphasis on recreation. Initiating these changes is the next stage in the preparation of a recreation management plan for the area under study in this thesis. / Forestry, Faculty of / Graduate

Extensive areas of Sitka spruce plantations established during the last 15 years on the CH-phase of the salal-moss ecosystem association on northern Vancouver Island are presently exhibiting symptoms of severe chlorosis and growth check. Investigations into the poor performance of these plantations are described in this thesis. Comparisons of the soil nutrient levels between this poorly productive CH-phase and the adjacent highly productive HA-phase were made. In addition, fertilization screening trials were established in order to identify possible limiting nutrients and determine the potential responsiveness of Sitka spruce to fertilization. Soil samples were collected over an age sequence of cutovers from both phases in order to compare differences in the soil nutrient status and to determine the effects of time since harvesting on N mineralization rates. Significantly greater amounts of total and available P and total, KC1 extractable, and mineralizable N (p=.01) were found in the mineral soil and humus of the HA-phase. The mineral soil of the HA-phase also had significantly higher (p=.05) concentrations of exchangeable K. In addition, this phase had a significantly lower (p=.01) C/N ratio. Although significant differences were noted in the mineral nutrient composition of the two phases, in all cases (with the possible exception of mineralizable N), the absolute differences between the two phases did not appear large enough to account for the dramatic differences in productivity. Harvesting plus slashburning appears to have had little effect on the rates of N mineralization in the humus or mineral soil of the HA-phase. However, in the CH-phase harvesting plus slashburning has had a significant influence on the mineralization rates of the humus but not of the mineral soil. Harvesting initially resulted in a significant (p=.05) increase in the mineralization rates, however, within five years they returned to levels comparable to that of the control. Fertilization screening trials were established in five Sitka spruce plantations ranging in age from 8 to 14 years. All plantations were growing on the CH-phase and were exhibiting symptoms of chlorosis and growth check. Changes in the first-year needle dry-weight, needle nutrient composition, and leader growth were monitored. Treatments for these trials consisted of a N, P, K factorial experiment, and one separate treatment of a complete nutrient mixture. Each treatment was replicated seven times in each of the five plantations. N or N plus K fertilization resulted in a 10% increase in needle dry-weight and a 25 to 30% increase in first-year leader growth response over that of the control. P fertilization had a strong synergistic effect and when added in combination with N or N plus K resulted in a needle dry-weight increase of 40 to 41% and a leader growth increase of 78 to 83%. A limited sample of naturally occurring hemlock in some of the plots exhibited similar trends, although leader growth increases were somewhat greater. Fertilization with P and K, alone or together, had no effect on leader growth or needle weight despite the severe deficiencies of these two elements. However, P had a positive influence on the uptake of N, K, Ca and Mg, whereas K positively affected Ca and depressed Mg. After N fertilization, foliar N concentrations increased dramatically, ranging from a mean of 3.2% for the lowest (200 kg N/ha) application rate to 4.1% for the highest (400 kg N/ha) application rate. The high foliar N concentrations had a significant negative influence on foliar K concentrations. This decline in K concentrations could only partially be attributed to a growth dilution effect and occurred whether or not K was added. A similar effect on P, Ca or Mg was not noted. The high N concentrations also appeared to have had a negative influence on both needle weight and leader growth as there was a tendency for the response of both to decline as N concentrations increased. There were significant differences in both leader growth and needle weight responses between some of the plantations, but treatments receiving both N and P fertilizers consistently gave the greatest responses. The individual treatment, however, which gave the greatest and most consistent overall response was that containing all macro- and micro-nutrients. Results from this study indicate that the poor performance of Sitka spruce plantations established on the CH-phase of the salal-moss ecosystem is partially due to a severe N and P deficiency. These deficiencies are associated with the complete invasion of these cutovers by salal. It has also been shown that the Sitka spruce in these plantations would be highly responsive to N and P fertilization. Although K does not appear to limit growth and no apparent benefits were gained from K fertilization, a severe N induced K deficiency is likely. / Forestry, Faculty of / Graduate

Western hemlock seedlings were grown for 8 months in a greenhouse with fertilizer amendments of N, P, N+P, and lime. Humus material was used as a growth medium. It was collected from low-productive sites identified by Lewis (1985) as the cedar-hemlock phase of the Thuja plicata - Tsuga heterophylla - Gautheria shallon - Rhytidiadelphusloreus ecosystem association unit designated as S1CH , on his ecosystem maps of Tree Farm Licences 6 and 25, which are located on northern Vancouver Island. A combination of 100 kg/ha N and 150 kg/ha P produced the most favourable seedling growth and foliar nutrient status. N or P added separately at these rates also gave superior seedling growth compared to the control. Neither lime, nor high rates of N (at 300 kg/ha with or without P) increased seedling growth. High N additions also restricted root development. N fertilization reduced foliar P concentrations, and P addition decreased foliar N concentrations. Foliar Mg concentrations increased when P fertilizers were added. N and/or P additions caused a decrease in foliar B concentrations. A combination of N and P increased foliar Zn concentrations and S, but reduced Mn absorption. Foliar R was inversely related to seedling productivity. Management recommendations for the S1CH sites include fertilizing with P, and increasing available N either by cultivation to increase mineralization or by low rates of N fertilization / Land and Food Systems, Faculty of / Graduate

There are very few published studies that have investigated in detail the economic impact of the forest industry at a subprovincial level in British Columbia. The reason most often cited is that the techniques of analysis viewed as most appropriate for handling such an undertaking require more economic data than are easily obtainable. It is the hypothesis of this study that sufficient data do exist to allow a close examination of the economic impact of the forest industry at a regional or local scale and that such an analysis can be conducted with some widely utilized and relatively simple techniques of measurement. The central interior of B.C. has been chosen as the study region because of its heavy dependence upon the forest industry for its economic well-being. The thesis begins with a discussion of the historical development of the forest industry in the central interior. It concentrates upon the economic factors that have affected the industry's direction and rate of growth and the impact that this has had on overall regional development. Analysis of the present relationship between the forest industry and the regional economy is in part accomplished using two forms of Economic Base Analysis - the Location Quotient method and the Minimum Requirements technique. Both of these forms of measurement are reviewed, highlighting the major theoretical and empirical research involving their application, particularly in regards to the forest industry in other regions of North America. Using Statistics Canada labour force data, the analysis has concluded that an employment multiplier of 2.13 is justifiable for the central interior of B.C. The latter portion of the thesis attempts a dynamic approach to tracing the linkages between the forest industry and the rest of the regional economy. Applying statistical analysis to three types of data - employment, earnings, and unemployment - the study reveals the complexity of the interindustrial linkages within the regional economic system. Several of the more significant findings are that the nonbasic sector of the economy exhibits surprising resilience to short-term employment fluctuations and that the unemployment rate is an often overlooked effect that must be carefully considered in determining the actual rate of development within a region. / Arts, Faculty of / Geography, Department of / Graduate