Resource and Market Projections for Forest Policy Development

Resource and Market Projections for Forest Policy Development

Author: Darius M. Adams

Publisher: Springer Science & Business Media

Published: 2007-09-18

Total Pages: 599

ISBN-13: 1402063091

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The text provides literature surveys on relevant modeling issues and policy concerns. It demonstrates the application of a modeling system using a "base case" 50-year projection and a small set of scenarios. These illustrate, for example, the effects of changes in public harvest policies, variations in investments in silviculture, and globalization. It is aimed at policy makers, researchers and graduate students who are building or using forest sector models.


Modelling Forest Development

Modelling Forest Development

Author: Klaus von Gadow

Publisher: Springer Science & Business Media

Published: 2001-11-30

Total Pages: 232

ISBN-13: 9781402002762

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The key to successful timber management is a proper understanding of growth processes, and one of the objectives of modelling forest development is to provide the tools that enable foresters to compare alternative silvicultural treatments. In a managed woodland, the most important periodic disturbances are the thinning operations, which are often carried out at regular intervals and which usually have a significant effect on the future evolution of the resource. Thus, a realistic model of forest development includes both natural growth and thinnings. One of the outstanding features of this book is its inclusion of thinning models at varying levels of resolution and consideration of differences in foresters' tree marking behaviour. Other interesting aspects include regional resource forecasting approaches, generalized stem taper functions, generalized diameter-height relations, new ways of describing and reproducing forest spatial structures, crown modelling and iterative competition modelling. Worked examples and code are provided where appropriate. The intended readership is graduate students.


Modelling Options for Disturbance of Areas Outside of the Timber Harvesting Land Base:

Modelling Options for Disturbance of Areas Outside of the Timber Harvesting Land Base:

Author:

Publisher:

Published: 2004

Total Pages: 9

ISBN-13:

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Management objectives for forest values are typically modelled in timber supply analyses. The objectives usually apply to the entire forest area within a particular management emphasis area and/or landscape unit. This forest area includes areas suitable for timber harvesting as well as forested areas assumed to be unavailable for harvest (the non-timber harvesting land base or non-THLB). This paper presents some approaches for modelling the role of natural disturbance such as wildfire & insect infestation within the non-THLB, most of which have been previously employed in timber supply analyses in British Columbia. Modelling details, critical comments, and examples of use of the model are reviewed for the following options: continuous ageing of the non-THLB; maintaining a static age class distribution in the non-THLB; uniform age reset on the entire forested non-THLB; age reset by variant in forested non-THLB; ignoring seral requirements; ignoring the contribution of the non-THLB; age class recycling; and stochastic disturbance modelling.


Forests on the Edge

Forests on the Edge

Author:

Publisher:

Published: 2005

Total Pages: 16

ISBN-13:

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The private working land base of America's forests is being converted to developed uses, with implications for the condition and management of affected private forests and the watersheds in which they occur. The Forests on the Edge project seeks to improve understanding of the processes and thresholds associated with increases in housing density in private forests and likely effects on the contributions of those forests to timber, wildlife, and water resources. This report, the first in a series, displays and describes housing density projections on private forests, by watershed, across the conterminous United States. An interdisciplinary team used geographic information system (GIS) techniques to identify fourth-level watersheds containing private forests that are projected to experience increased housing density by 2030. Results indicate that some 44.2 million acres (over 11 percent) of private forests--particularly in the East, where most private forests occur--are likely to see dramatic increases in housing development in the next three decades, with consequent impacts on ecological, economic, and social services. Although conversion of forest land to other uses over time is inevitable, local jurisdictions and states can target efforts to prevent or reduce conversion of the most valuable forest lands to keep private working forests resilient and productive.