Timber Resource Statistics of South-central Alaska, 2003 PDF Download

Author: Willem W. S. Van Hees
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 36

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Author: Sally J. Campbell
Publisher:
ISBN:
Category : Forest surveys
Languages : en
Pages : 36

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Book Description
This publication presents highlights of a recent south-central Alaska inventory conducted by the Pacific Northwest Research Station Forest Inventory and Analysis Program (USDA Forest Service). South-central Alaska has about 18.5 million acres, of which one-fifth (4 million acres) is forested. Species diversity is greatest in closed and open Sitka spruce forests, spruce woodlands, closed tall alder shrub type, and low shrub willow type. Of the forest land, 1.9 million acres are classified as timberland (unreserved productive forest land). About 1.3 million acres of forest land are reserved from harvest; these reserved forest acres are primarily on the Kenai National Wildlife Refuge, national parks, and the Chugach National Forest. The volume of timber on timberland was estimated at 5,087 million cubic feet; the plurality of volume44 percentis on state and local government lands with the remaining volume primarily on private lands (28 percent) and national forests (23 percent). Fifty-seven percent of timberland acres and 93 percent of the growing-stock volume is in sawtimber stands, with Sitka spruce forest type predominating. Most timberland in south-central Alaska is of relatively low productivity, producing less than 50 cubic feet per acre per year. For timberland acres on state and private lands, average annual mortality and harvest exceeded average annual growth.

Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 704

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Author:
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 430

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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 136

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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1050

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Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 470

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Author: John A. Wiens
Publisher: John Wiley & Sons
ISBN: 1444337939
Category : Science
Languages : en
Pages : 360

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In North America, concepts of Historical Range of Variability are being employed in land-management planning for properties of private organizations and multiple government agencies. The National Park Service, U.S. Fish & Wildlife Service, Bureau of Land Management, U.S. Forest Service, and The Nature Conservancy all include elements of historical ecology in their planning processes. Similar approaches are part of land management and conservation in Europe and Australia. Each of these user groups must struggle with the added complication of rapid climate change, rapid land-use change, and technical issues in order to employ historical ecology effectively. Historical Environmental Variation in Conservation and Natural Resource Management explores the utility of historical ecology in a management and conservation context and the development of concepts related to understanding future ranges of variability. It provides guidance and insights to all those entrusted with managing and conserving natural resources: land-use planners, ecologists, fire scientists, natural resource policy makers, conservation biologists, refuge and preserve managers, and field practitioners. The book will be particularly timely as science-based management is once again emphasized in United States federal land management and as an understanding of the potential effects of climate change becomes more widespread among resource managers. Additional resources for this book can be found at: www.wiley.com/go/wiens/historicalenvironmentalvariation.

Author: Glenn R. Guntenspergen
Publisher: Springer Science & Business Media
ISBN: 1489980415
Category : Technology & Engineering
Languages : en
Pages : 324

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Natural resource managers face a complex decision-making environment characterized by the potential occurrence of rapid and abrupt ecological change. These abrupt changes are poorly accommodated by traditional natural resource planning and decision-making processes. As recognition of threshold processes has increased, contemporary models of ecological systems have been modified to better represent a broader range of ecological system dynamics. Key conceptual advances associated with the ideas of non-linear responses, the existence of multiple ecological stable states and critical thresholds are more likely the rule than the exception in ecological systems. Once an ecological threshold is crossed, the ecosystem in question is not likely to return to its previous state. There are many examples and a general consensus that climatic disruptions will drive now stable systems across ecological thresholds. This book provides professional resource managers with a broad general decision framework that illustrates the utility of including ecological threshold concepts in natural resource management. It gives an entry into the literature in this rapidly evolving concept, with descriptions and discussion of the promising statistical approaches for threshold detection and demonstrations of the utility of the threshold framework via a series of case studies.

Author: Bernan Press
Publisher:
ISBN: 9781598880793
Category : Reference
Languages : en
Pages : 1032

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Book Description
The Statistical Abstract of the United States is one of the most reliable and popular statistical references in existence. The Bernan Press Library Edition presents the complete, official content of the Statistical Abstract in an easily readable format - with 25 percent larger type than in the U.S. government edition - and with a sturdy binding designed to withstand heavy use in libraries.