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Ecological Characteristics Of Forested Watersheds Along The Central Oregon Coast
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Book Synopsis Ecological Characteristics of Forested Watersheds Along the Central Oregon Coast by : Matthew Sidney Kimble
Download or read book Ecological Characteristics of Forested Watersheds Along the Central Oregon Coast written by Matthew Sidney Kimble and published by . This book was released on 1995 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forest and Stream Management in the Oregon Coast Range by : Stephen D. Hobbs
Download or read book Forest and Stream Management in the Oregon Coast Range written by Stephen D. Hobbs and published by . This book was released on 2002 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Watershed-scale Vegetation Patterns in a Late-successional Forest Landscape in the Oregon Coast Range by : Michael C. Wimberly
Download or read book Watershed-scale Vegetation Patterns in a Late-successional Forest Landscape in the Oregon Coast Range written by Michael C. Wimberly and published by . This book was released on 1999 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge about vegetation patterns and ecological processes in unmanaged, late-successional watersheds is needed to provide a foundation for forest management strategies aimed at conserving native biodiversity. I examined influences of environmental variability and disturbance history on forest structure and composition in the Cummins Creek Wilderness, located on the central Oregon coast. Climatic and topographic variables explained the majority of hillslope community composition, while fire history explained most of the variability in hillslope forest structure. Forest structure and composition in riparian areas was related to a climatic gradient as well as position in the stream network. The abundance of two fire-sensitive species, Tsuga heterophylla (western hemlock) and Picea sitchensis (Sitka spruce), decreased with distance from old-growth patches, possibly reflecting a seed dispersal gradient that occurred following fires 80 to 140 years ago. I developed predictive maps of understory conifer patterns using remote sensing, aerial photographs, digital elevation models and stream maps. I predicted P. sitchensis regeneration based on distance from the coast and topography, and T. heterophylla regeneration based on crown size, percent hardwood composition, topography, and distance from old-growth patches. Although I found statistically significant relationships between understory patterns and GIS predictor variables, the models explained only low to moderate amounts of the overall variability. Landscape-scale simulations of T. heterophylla showed that population expansion through gap-phase recruitment was limited by short seed dispersal distances in closed-canopy forests, the requirement for canopy gap disturbances to facilitate overstory recruitment, and the lag between recruitment and reproduction. Although fine-scale habitat features can influence the amount of regeneration in a gap when seed sources are present, the fire regime may ultimately control the abundance of T. heterophylla at the landscape scale through dispersal limitations. Brief increases in fire frequency can cause a sustained decrease in the amount of T. heterophylla on the landscape once fire frequency is reduced below a threshold value. Our results emphasize the complexity and diversity of forest vegetation at the watershed scale. Environmental variability, disturbance history, and dispersal limitations have all played a role in creating the current landscape patterns in the Cummins Creek Wilderness.
Book Synopsis The Importance of Wood in Headwater Streams of the Oregon Coast Range by : Christine May
Download or read book The Importance of Wood in Headwater Streams of the Oregon Coast Range written by Christine May and published by . This book was released on 2004 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Contextual Systems Description of an Oregon Coastal Watershed by : Brigitte Goetze
Download or read book Contextual Systems Description of an Oregon Coastal Watershed written by Brigitte Goetze and published by . This book was released on 1988 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many resource management controversies indicate disagreement about the possible intended and unintended effects of management actions on ecosystems. Researchers have documented a variety of negative effects on specific ecosystems, e. g. the degradation of salmonid habitat due to mass wasting (Hagans et al. 1986). While the effects of some management actions are reversible, others change systems capacities and are therefore irreversible, e.g. the poisoning of Kesterson Wildlife Refuge with selenium due to agricultural practices (Schuler 1987). The difference between reversible and irreversible management effects is often a matter of scale. Management actions that are out of concordance with the properties of a system have the potential to irreversibly change a system if applied over large spatial and temporal scales. Using the method of contextual watershed classification (Warren 1979) the concordance of forest management with the properties of the Yaquina drainage (an Oregon coastal watershed of 220 sq. mi. size) and its environmental class (the North-central Coast Range) are evaluated. For this purpose, the watershed and its environment are classified according to five components: climate, substrate, biota, water, and culture. Properties are selected that are rather invariant and general, and therefore reflect the potential capacities of system and environment. The climatic, geologic, geomorphic, and hydrologic characteristics are compared to trophic relationships and life history traits of selected tree species in an attempt to understand the biophysical relationships in the forest environment that dominates the watershed. It is found that commonly applied harvest regimes are out of concordance with the biophysical environment and thus have the potential to lead to resource loss. Alternative management practices that would be more concordant with resource properties are proposed. The influence of dominant world views (namely mechanism, realism, rationalism, individualism, utilitarianism, and elitism) on the forest planning process and on the opinions of community leaders is evaluated. It is found that forest management practices, although they are out of concordance with the biophysical environment, are in concordance with the larger cultural environment and the perceptions and opinions of local community leaders. Hence, adopting new practices that are more concordant with the biophysical environment will be difficult. The major hindrance is located in the economic sphere. Concerns relating to the economical sphere are discussed and a probable route to more concordant resource use is proposed.
Book Synopsis Debris Flow Characteristics Associated with Forest Practices in the Central Oregon Coast Range by : Christine L. May
Download or read book Debris Flow Characteristics Associated with Forest Practices in the Central Oregon Coast Range written by Christine L. May and published by . This book was released on 1998 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Debris flows in the Pacific Northwest play a major role in routing wood and sediment stored on hillslopes and in first- through third-order channels to higher order channels and valley floors. Forest practices on steep, unstable slopes and removal of riparian trees along low-order streams can affect the frequency, magnitude, and composition of debris flows. The quantity and quality of debris flow deposits provides sediment and wood fundamental to the development of the receiving channel. Field surveys document characteristics of the initiation site, runout zone, and deposit of 53 debris flows in the Siuslaw Basin of the central Oregon Coast Range, during the winter of 1996. Landslides that initiated debris flows in clearcuts had a higher frequency, larger average volume, and runout zones that affected a greater length of stream channel than landslides from forested slopes. This difference resulted in an increase in the total volume of sediment mobilized by the debris flow, and a greater proportion of this sediment came from hillslope sources. Debris flows initiated at roads had an order of magnitude greater volume of sediment compared to non-road-related failures. Debris flows of equivalent size that traveled through a forested channel delivered only a slightly greater volume of large wood, than those through clearcuts. Size-class distributions of wood in the deposit and trees on the hillslope were not well correlated. The average diameter of wood in the deposit was greater than the diameter of trees currently present on the surrounding hillslopes. This difference reflects the legacy of large woody debris stored in low-order channels and valley floors. Large trees along the edge of the runout zone is also an important component in the recovery of these low-order channels, which were transformed into a bedrock state. Large trees along the edges of forested slopes are already supplying wood to these channels, and were the only mechanism observed for trapping large volumes of sediment. This mechanism for retaining sediment in high gradient, low-roughness channels is not available in clearcuts, which now contain the greatest proportion of bedrock channels. Forest practices, by altering the frequency, magnitude, and composition of the debris flow, may alter the long-term potential for developing complex channel morphology and high-quality aquatic habitat.
Book Synopsis An Ecological Characterization of the Pacific Northwest Coastal Region: Characterization atlas-watershed unit descriptions by :
Download or read book An Ecological Characterization of the Pacific Northwest Coastal Region: Characterization atlas-watershed unit descriptions written by and published by . This book was released on 1980 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis USDA Forest Service Research Paper PNW. by :
Download or read book USDA Forest Service Research Paper PNW. written by and published by . This book was released on 1969 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecological Characterization of the Central and Northern California Coastal Region: pt.1. Regional characterization. pt.2. Species by :
Download or read book Ecological Characterization of the Central and Northern California Coastal Region: pt.1. Regional characterization. pt.2. Species written by and published by . This book was released on 1981 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper NE written by and published by . This book was released on 1987 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research and Cumulative Watershed Effects by : Leslie M. Reid
Download or read book Research and Cumulative Watershed Effects written by Leslie M. Reid and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Compatible Forest Management by : Robert A. Monserud
Download or read book Compatible Forest Management written by Robert A. Monserud and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Public debate has stimulated interest in finding greater compatibility among forest management regimes. The debate has often portrayed management choices as tradeoffs between biophysical and socioeconomic components of ecosystems. Here we focus on specific management strategies and emphasize broad goals such as biodiversity, wood production and habitat conservation while maintaining other values from forestlands desired by the public. We examine the following proposition: Commodity production (timber, nontimber forest products) and the other forest values (biodiversity, fish and wildlife habitat) can be simultaneously produced from the same area in a socially acceptable manner. Based on recent research in the Pacific Northwest, we show there are alternatives for managing forest ecosystems that avoid the divisive arena of 'either-or' choices. Much of the work discussed in this book addresses two aspects of the compatibility issue. First, how are various forest management practices related to an array of associated goods and services? Second, how do different approaches to forest management affect relatively large and complex ecosystems?
Download or read book General Technical Report PSW. written by and published by . This book was released on 1978 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatise on Geomorphology written by and published by Academic Press. This book was released on 2013-02-27 with total page 6392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changing focus and approach of geomorphic research suggests that the time is opportune for a summary of the state of discipline. The number of peer-reviewed papers published in geomorphic journals has grown steadily for more than two decades and, more importantly, the diversity of authors with respect to geographic location and disciplinary background (geography, geology, ecology, civil engineering, computer science, geographic information science, and others) has expanded dramatically. As more good minds are drawn to geomorphology, and the breadth of the peer-reviewed literature grows, an effective summary of contemporary geomorphic knowledge becomes increasingly difficult. The fourteen volumes of this Treatise on Geomorphology will provide an important reference for users from undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic. Information on the historical development of diverse topics within geomorphology provides context for ongoing research; discussion of research strategies, equipment, and field methods, laboratory experiments, and numerical simulations reflect the multiple approaches to understanding Earth’s surfaces; and summaries of outstanding research questions highlight future challenges and suggest productive new avenues for research. Our future ability to adapt to geomorphic changes in the critical zone very much hinges upon how well landform scientists comprehend the dynamics of Earth’s diverse surfaces. This Treatise on Geomorphology provides a useful synthesis of the state of the discipline, as well as highlighting productive research directions, that Educators and students/researchers will find useful. Geomorphology has advanced greatly in the last 10 years to become a very interdisciplinary field. Undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic will find the answers they need in this broad reference work which has been designed and written to accommodate their diverse backgrounds and levels of understanding Editor-in-Chief, Prof. J. F. Shroder of the University of Nebraska at Omaha, is past president of the QG&G section of the Geological Society of America and present Trustee of the GSA Foundation, while being well respected in the geomorphology research community and having won numerous awards in the field. A host of noted international geomorphologists have contributed state-of-the-art chapters to the work. Readers can be guaranteed that every chapter in this extensive work has been critically reviewed for consistency and accuracy by the World expert Volume Editors and by the Editor-in-Chief himself No other reference work exists in the area of Geomorphology that offers the breadth and depth of information contained in this 14-volume masterpiece. From the foundations and history of geomorphology through to geomorphological innovations and computer modelling, and the past and future states of landform science, no "stone" has been left unturned!
Book Synopsis Hydrologic and Related Characteristics of Three Small Watersheds in the Oregon Cascades by : Jack Rothacher
Download or read book Hydrologic and Related Characteristics of Three Small Watersheds in the Oregon Cascades written by Jack Rothacher and published by . This book was released on 1967 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CWE written by and published by . This book was released on 1998 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sustainable Forest Management by : Klaus von Gadow
Download or read book Sustainable Forest Management written by Klaus von Gadow and published by Springer Science & Business Media. This book was released on 2001-11-30 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: During its 200-year history the concept of sustainable forest ecosystem management has been the object of scientific and political discussion, with varying degrees of intensity - promoted with vehement fervour during periods of social or economic crisis, and less intensely during periods of stability. This volume, which forms part of the book series Managing Forest Ecosystems, presents state-of-the-art contributions presented by 9 leading authors from North America, Europe, Australia, and Southern Africa. If technical knowledge is a constraint to the implementation of sustainable management, this book contains a wealth of information which may be useful to students and practitioners alike. The specific target readership includes company management, the legal and policy environment, and forestry administrators. This book's unique feature is its holistic approach which includes ecological, socio-political, and timber supply issues.
