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Author: F.A. Andersson
Publisher: Elsevier
ISBN: 9780444816276
Category : Nature
Languages : en
Pages : 654
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Book Description
Starting with an account of the history and distribution of the conifers, this volume describes the most important areas in Asia, Europe, North and South America with conifer forests. The last in the "Ecosystem of the World" series, it deals with the functional aspects of the conifer forests, such as physiology, production, biomass, and more.
Author: F.A. Andersson
Publisher: Elsevier
ISBN: 9780444816276
Category : Nature
Languages : en
Pages : 654
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Book Description
Starting with an account of the history and distribution of the conifers, this volume describes the most important areas in Asia, Europe, North and South America with conifer forests. The last in the "Ecosystem of the World" series, it deals with the functional aspects of the conifer forests, such as physiology, production, biomass, and more.
Author: William K. Smith
Publisher: Academic Press
ISBN: 0080925936
Category : Technology & Engineering
Languages : en
Pages : 352
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Book Description
Conifers--pine, fir, and spruce trees--are dominant species in forests around the world. This book focuses on the physiology of conifers and how these physiological systems operate. Special consideration is devoted to the means by which ecophysiological processes influence organismal function and distribution. Chapters focus on the genetics of conifers, their geographic distribution and the factors that influence this distribution, the impact of insect herbivory on ecophysiological parameters, the effects of air pollution, and the potential impact that global climatic changes will have upon conifers. Because of the growing realization that forests have a crucial role to play in global environmental health, this book will appeal to a developing union of ecologists, physiologists and more theoretically minded foresters.
Author: Roland McMillan Harper
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 40
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Book Description
Author:
Publisher:
ISBN:
Category : Roots (Botany)
Languages : en
Pages : 40
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Book Description
After nearly 100 years of fire exclusion, introduced pests, and selective harvesting, a change in forest composition has occurred in many Inland West forests of North America. This change in forest structure has frequently been accompanied by increases in root diseases and/or an unprecedented buildup of fuels. Consequently, many forest managers are implementing plans for fuels treatments to lower the risk of severe wildfires. Impacts on root disease should be considered before selecting appropriate fuels treatments. Complex interactions exist among conifer root diseases, fuels treatments, forest structure, species composition, stand history, and other environmental factors. As forest managers prescribe fuels treatments, their success in lowering the risk of severe wildfire will depend in part on the impacts of these treatments on root disease. Root diseases are one of many factors to be considered when developing plans for fuels treatments. Choices must be made on a site-by-site basis, with knowledge of the diseases that are present. This paper provides examples of how fuels treatments may increase or reduce specific diseases and demonstrates their importance as considerations in the fuels management planning process. Several root diseases prevalent within Inland West of North America are addressed: Armillaria root disease, annosus root disease, laminated root rot, black stain root disease, Schweinitzii root and butt rot, Tomentosus root disease, Rhizina root rot, and stringy butt rot. For each disease, general information is provided on disease identification, management options, and potential effects of fuels treatments. However, many long-term studies are needed to assess effects of specific interactions among fuels treatments, root diseases, and host trees.
Author: Hudson G. Reynolds
Publisher:
ISBN:
Category : Aspen
Languages : en
Pages : 4
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Book Description
Author: David S. Pilliod
Publisher:
ISBN:
Category : Forest animals
Languages : en
Pages : 44
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Book Description
This paper synthesizes available information on the effects of hazardous fuel reduction treatments on terrestrial wildlife and invertebrates in dry coniferous forest types in the West. We focused on thinning and/or prescribed fire studies in ponderosa pine (Pinus ponderosa) and dry-type Douglas-fir (Pseudotsuga menziesii), lodgepole pine (Pinus contorta), and mixed coniferous forests. Overall, there are tremendous gaps in information needed to evaluate the effects of fuel reduction on the majority of species found in our focal area. Differences among studies in location, fuel treatment type and size, and pre- and post-treatment habitat conditions resulted in variability in species responses. In other words, a species may respond positively to fuel reduction in one situation and negatively in another. Despite these issues, a few patterns did emerge from this synthesis. In general, fire-dependent species, species preferring open habitats, and species that are associated with early successional vegetation or that consume seeds and fruit appear to benefit from fuel reduction activities. In contrast, species that prefer closed-canopy forests or dense understory, and species that are closely associated with those habitat elements that may be removed or consumed by fuel reductions, will likely be negatively affected by fuel reductions. Some habitat loss may persist for only a few months or a few years, such as understory vegetation and litter that recover quickly. The loss of large-diameter snags and down wood, which are important habitat elements for many wildlife and invertebrate species, may take decades to recover and thus represent some of the most important habitat elements to conserve during fuel reduction treatments. Management activities that consider the retention of habitat structures (such as snags, down wood, and refugia of untreated stands) may increase habitat heterogeneity and may benefit the greatest number of species in the long run.
Author: Julius Valentine Hofmann
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 60
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Book Description
Author: Helena Curtis
Publisher: Macmillan
ISBN: 9780879016791
Category : Science
Languages : en
Pages : 968
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Book Description
This clearly written, accurate, and well-illustrated introduction to biology seamlessly integrates the theme of evolution while offering expanded, up-to-date coverage of genetic engineering, the immune response, embryological development, and ecological concerns.
Author: A. I. Breymeyer
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 496
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Book Description
This volume critically assesses the present state of our knowledge, reviews extant forest and grasslands models, and develops foundations for the design of diagnostic and predictive models, as well as identifying plans for future research on ecosystem response to global change. Carbon flow and storage are emphasised, although the flow and storage of key nutrients such as nitrogen, sulphur and phosphorus are also considered when deemed necessary to understand changes in the carbon budget of coniferous forests and grasslands.
Author: Virgil E. Scott
Publisher:
ISBN:
Category : Aspen
Languages : en
Pages : 24
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Book Description
