Evaluation Of Management Alternatives For An Undeveloped Forested Area In Oregons Coast Range PDF Download
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Author | : K. Norman Johnson |
Publisher | : |
Total Pages | : 374 |
Release | : 1973 |
Genre | : Forest management |
ISBN | : |
Download Evaluation of Management Alternatives for an Undeveloped, Forested Area in Oregon's Coast Range Book in PDF, ePub and Kindle
One of the most vexing problems facing the United States Forest Service in Western Oregon concerns its management of undeveloped forested lands. Many of these areas contain highly productive timberland, and restriction of timber harvesting to preserve the land's primitive character can be very costly. Also there are conflicting pressures over recreation development. This study examines possible uses of a 12,500 acre, largely undeveloped tract on the Siuslaw National Forest. The tract, centered on an unroaded stretch of a stream called Drift Creek, contains productive timberland and a scenic, wild stream. After selection of the Study Area, alternatives are developed to reflect a range of choice for the Forest Service in timber and recreation management. The new Forest Service visual management system is used to describe the visual quality standards for the Study Area under each alternative. Also, a number of measures of objective attainment are developed to enable measurement of the benefits and costs associated with each alternative. A large portion of the study is devoted to estimating the cost of restricting timber harvests to preserve the primitive character of the Study Area. These costs are estimated, for a number of stumpage demand patterns, under current Forest Service procedures for determining harvest levels, and also when demand is expressly used as the driving force in setting harvest levels.
Author | : United States. Forest Service |
Publisher | : |
Total Pages | : 420 |
Release | : 1976 |
Genre | : Lumbering |
ISBN | : |
Download Timber Harvest Scheduling Issues Study Book in PDF, ePub and Kindle
Author | : Stephen D. Hobbs |
Publisher | : |
Total Pages | : 336 |
Release | : 2002 |
Genre | : Nature |
ISBN | : |
Download Forest and Stream Management in the Oregon Coast Range Book in PDF, ePub and Kindle
This major volume presents a wealth of fundamental and applied research on managing Coast Range forest and stream ecosystems. Written primarily for managers and resource specialists, the book will also appeal to policymakers, resource scientists, forest landowners, the conservation community, and students interested in forestry, fisheries, and wildlife sciences.
Author | : |
Publisher | : |
Total Pages | : 334 |
Release | : 1969 |
Genre | : Forests and forestry |
ISBN | : |
Download Forest Science Book in PDF, ePub and Kindle
Author | : United States. Congress. House. Committee on Agriculture. Subcommittee on Forests, Family Farms, and Energy |
Publisher | : |
Total Pages | : 290 |
Release | : 1993 |
Genre | : Business & Economics |
ISBN | : |
Download Review of the Report "Alternatives for Management of Late-successional Forests of the Pacific Northwest" by the Scientific Panel on Late-Successional Forest Ecosystems Book in PDF, ePub and Kindle
Author | : Etsuko Nonaka |
Publisher | : |
Total Pages | : 298 |
Release | : 2003 |
Genre | : Forest management |
ISBN | : |
Download Disturbance and Landscape History as a Reference for Evaluating Forest Management Effects at a Regional Scale Book in PDF, ePub and Kindle
History is an invaluable source of information to understand and evaluate management influences on contemporary ecosystems and landscapes. The first two chapters (Chapters 2 and 3) explored the concept of historical range of variability (HRV) in landscape structure and stand structure using a stochastic fire simulation model to simulate presettlement (before 1850) landscapes of the Oregon Coast Range. HRV has been defined as the bounded variability of a system within constraints imposed by larger-scale phenomena (e.g. climate, topography) and without significant modern human influence. HRV of landscapes has been proposed as a guide for biodiversity conservation in the past decade. In Chapter 2, I estimated HRV of a regional landscape and evaluated the similarity of current and alternative future landscapes under two land management scenarios to the conditions within the HRV. The simulation results indicated that historical landscapes of the region were dynamic, composed of patches of various sizes and age classes ranging from 0 to> 800 years as well as numerous small unburned island patches. The current landscape was outside the HRV. The landscape did not return to the HRV in 100 years under either scenario largely because of lack of old-growth forests and overabundance of young forests. This study showed that the HRV can provide a reference condition for concrete, quantitative evaluations of landscape conditions and alternative management scenarios if sufficient data exist for estimating HRV. Departure from HRV can serve as an indicator of landscape conditions, but results depend on scale and quantification of landscape heterogeneity. In Chapter 3, I investigated the HRV in live and dead biomass and examined variability in disturbance history and forest stand development. I calculated biomass as a function of disturbance history. The HRV of live and dead wood biomass distributions revealed that the majority of the landscape historically contained> 500 Mg/ha of live wood and 50-200 Mg/ha of dead wood. The current dead wood condition is outside HRV. There was a wide variation in dead wood biomass because of variations in disturbance history. This study suggests that natural disturbance regimes and stand development are characterized by much larger variation than is typically portrayed or appreciated. The HRV approaches to evaluating landscape conditions need to include both landscape and stand characteristics to better represent ecological differences between managed and unmanaged landscapes. In Chapter 4, I used remotely sensed data and historical vegetation data in a GIS to examine changes occurred in vegetation cover since settlement in two major valleys, the Coquille and Tillamook, in the region. I used existing historical vegetation maps of the two valleys and collected historical vegetation data from the General Land Office (GLO) survey records. I characterized current vegetation conditions using an unsupervised classification of satellite images. Historically, the Coquille Valley was dominated by hardwood trees and the Tillamook was by conifers. Valley bottoms in both areas differed in vegetation from nearby uplands. Tree-covered areas have declined substantially in both valleys as a result of agriculture and development. The historical data offered reference conditions for assessment of changes in biodiversity that have occurred in these unique habitats. This thesis illustrates the benefit of using historical landscape information for better understanding of human influence on the landscape. Historical data often have many assumptions and limitations, but ecological impacts of landscape changes on native biota can be better understood by comparisons with historical conditions.
Author | : John Meadows |
Publisher | : |
Total Pages | : 484 |
Release | : 1975 |
Genre | : Forest management |
ISBN | : |
Download Systems Analysis and Forest Resource Management Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 1086 |
Release | : 1984 |
Genre | : Dissertations, Academic |
ISBN | : |
Download Comprehensive Dissertation Index Book in PDF, ePub and Kindle
Vols. for 1973- include the following subject areas: Biological sciences, Agriculture, Chemistry, Environmental sciences, Health sciences, Engineering, Mathematics and statistics, Earth sciences, Physics, Education, Psychology, Sociology, Anthropology, History, Law & political science, Business & economics, Geography & regional planning, Language & literature, Fine arts, Library & information science, Mass communications, Music, Philosophy and Religion.
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1998 |
Genre | : Ecosystem management |
ISBN | : |
Download Late-successional Reserve Assessment for Oregon's North Coast Range Adaptive Management Area Book in PDF, ePub and Kindle
Author | : United States. Forest Service |
Publisher | : |
Total Pages | : 214 |
Release | : 1979 |
Genre | : Environmental impact analysis |
ISBN | : |
Download Alsea Planning Unit Book in PDF, ePub and Kindle