Genetic Variation and Seed Zones of Douglas-Fir in the Siskiyou National Forest (Classic Reprint) PDF Download
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Author: Robert K. Campbell
Publisher: Forgotten Books
ISBN: 9780331359800
Category :
Languages : en
Pages : 34
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Book Description
Excerpt from Genetic Variation and Seed Zones of Douglas-Fir in the Siskiyou National Forest Because of the range in elevations and the diversity in climate and vegetation within the region, the Forest has been partitioned into six breeding blocks, each including 460-meter and 305-meter elevational bands. This translates into 22 units that must be considered in breeding plans. There is uncertainty whether this number is justified by adaptational or other constraints, and larger blocks would greatly decrease the costs of breeding and increase the benefits. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Robert K. Campbell
Publisher: Forgotten Books
ISBN: 9780331359800
Category :
Languages : en
Pages : 34
Get Book Here
Book Description
Excerpt from Genetic Variation and Seed Zones of Douglas-Fir in the Siskiyou National Forest Because of the range in elevations and the diversity in climate and vegetation within the region, the Forest has been partitioned into six breeding blocks, each including 460-meter and 305-meter elevational bands. This translates into 22 units that must be considered in breeding plans. There is uncertainty whether this number is justified by adaptational or other constraints, and larger blocks would greatly decrease the costs of breeding and increase the benefits. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Donald F. Flora
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 58
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Book Description
Author: Robert Kenneth Campbell
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 23
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Book Description
Author: Robert K. Campbell
Publisher:
ISBN:
Category :
Languages : en
Pages : 23
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Book Description
Author: Roy R. Silen
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 44
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Book Description
Author: G. E. Rehfeldt
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 8
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Book Description
Author: Anthony Godfrey
Publisher: U.S. Government Printing Office
ISBN:
Category : Nature
Languages : en
Pages : 688
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Book Description
"United States Department of Agriculture, Forest Service, Pacific Southwest Region"
Author: D. C. West
Publisher: Springer Science & Business Media
ISBN: 1461259509
Category : Science
Languages : en
Pages : 530
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Book Description
Succession-nothing in plant, community, or ecosystem ecology has been so elaborated by terminology, so much reviewed, and yet so much the center of controversy. In a general sense, every ecologist uses the concept in teaching and research, but no two ecologists seem to have a unified concept of the details of succession. The word was used by Thoreau to describe, from a naturalist's point of view, the general changes observed during the transition of an old field to a forest. As data accumulated, a lengthy taxonomy of succession developed around early twentieth century ecologists such as Cooper, Clements, and Gleason. Now, nearer the end of the century, and after much discussion concerning the nature of vegetation communities, where do ecologists stand with respect to knowledge of ecological succession? The intent of this book is not to rehash classic philosophies of succession that have emerged through the past several decades of study, but to provide a forum for ecologists to present their current research and present-day interpretation of data. To this end, we brought together a group of scientists currently studying terrestrial plant succession, who represent research experience in a broad spectrum of different ecosystem types. The results of that meeting led to this book, which presents to the reader a unique summary of contemporary research on forest succession.
Author: Brenda C. McComb
Publisher: CRC Press
ISBN: 1420007637
Category : Nature
Languages : en
Pages : 338
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Book Description
In recent years, conflicts between ecological conservation and economic growth forced a reassessment of the motivations and goals of wildlife and forestry management. Focus shifted from game and commodity management to biodiversity conservation and ecological forestry. Previously separate fields such as forestry, biology, botany, and zoology merged
Author: Therese M. Poland
Publisher: Springer Nature
ISBN: 3030453677
Category : Science
Languages : en
Pages : 455
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Book Description
This open access book describes the serious threat of invasive species to native ecosystems. Invasive species have caused and will continue to cause enormous ecological and economic damage with ever increasing world trade. This multi-disciplinary book, written by over 100 national experts, presents the latest research on a wide range of natural science and social science fields that explore the ecology, impacts, and practical tools for management of invasive species. It covers species of all taxonomic groups from insects and pathogens, to plants, vertebrates, and aquatic organisms that impact a diversity of habitats in forests, rangelands and grasslands of the United States. It is well-illustrated, provides summaries of the most important invasive species and issues impacting all regions of the country, and includes a comprehensive primary reference list for each topic. This scientific synthesis provides the cultural, economic, scientific and social context for addressing environmental challenges posed by invasive species and will be a valuable resource for scholars, policy makers, natural resource managers and practitioners.
