Download or read book Polymorphic Site Index Curves for Black Spruce Picea Mariana Mill B S P in the Nelson River Forest District of Northern Manitoba written by John C. Cole and published by . This book was released on 1996 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Development in Cold Climates written by John Alden and published by Springer Science & Business Media. This book was released on 1993-06-30 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: ''Required reading for forest scientists.'' -Northeastern Naturalist
Download or read book The Autecology of Major Tree Species in the North Central Region of Ontario written by Canada-Ontario Forest Resource Development Agreement and published by [Sault Ste Marie? Ont.] : Canada-Ontario Forest Resource Development Agreement. This book was released on 1990 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permafrost Ecosystems written by Akira Osawa and published by Springer Science & Business Media. This book was released on 2010-01-04 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing from a decade-long collaboration between Japan and Russia, this important volume presents the first major synthesis of current knowledge on the ecophysiology of the coniferous forests growing on permafrost at high latitudes. It presents ecological data for a region long inaccessible to most scientists, and raises important questions about the global carbon balance as these systems are affected by the changing climate. Making up around 20% of the entire boreal forests of the northern hemisphere, these ‘permafrost forest ecosystems’ are subject to particular constraints in terms of temperature, nutrient availability, and root space, creating exceptional ecosystem characteristics not known elsewhere. This authoritative text explores their diversity, structure, dynamics and physiology. It provides a comparison of these forests in relation to boreal forests elsewhere, and concludes with an assessment of the potential responses of this unique biome to climate change. The book will be invaluable to advanced students and researchers interested in boreal vegetation, forest ecology, silviculture and forest soils, as well as to researchers into climate change and the global carbon balance.
Download or read book Silvics of Forest Trees of the United States written by and published by . This book was released on 1965 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mycorrhizal Biotechnology written by Devarajan Thangadurai and published by CRC Press. This book was released on 2010-06-16 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several studies have demonstrated that mycorrhizal associations play vital role in plant nutrition. They greatly increase the efficiency of nutrient and water uptake, enhance resistance to pathogens, and buffer plant species against several environmental stresses and drought resistance. Mycorrhizae also improve plant growth and survival in soils co
Download or read book Field Guide to the Autecology of Selected Crop Trees and Competitor Species in Northeastern Ontario written by R. W. Arnup and published by Timmins, Ont. : Northeast Science & Technology. This book was released on 1995 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual contains information on seven commercially important tree species and on 44 plant species that may compete with these crop tree species in northeastern Ontario. The introduction provides background information for the species comparison tables and species summaries that follow, and explains the format of the manual. The tables give information on each species' autecology in the context of the Forest Ecosystem Classification (FEC) system for northeastern Ontario. In addition, each potential competitor is evaluated with respect to their competitive effects and mechanisms, their response to disturbance and silvicultural treatments, and their potential value for wildlife. The crop tree species are evaluated with respect to their response to competition and their ability to respond to release. Line diagrams are included to aid in field recognition. The appendix contains a glossary and a key to FEC names and descriptions.
Download or read book Assessment and Management of Plant Invasions written by James O. Luken and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological invasion of native plant communities is a high-priority problem in the field of environmental management. Resource managers, biologists, and all those involved in plant communities must consider ecological interactions when assessing both the effects of plant invasion and the long-term effects of management. Sections of the book cover human perceptions of invading plants, assessment of ecological interactions, direct management, and regulation and advocacy. It also includes an appendix with descriptive data for many of the worst weeds.
Download or read book The Woody Plant Seed Manual written by United States. Forest Service and published by Forest Service. This book was released on 2008 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth and Yield of Black Spruce Picea Mariana Mill B S P in Alaska written by Carolyn Rosner and published by . This book was released on 2004 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Black spruce, Picea mariana (Mill.) B.S.P., is largely overlooked in Alaska because of its small size and slow growth. Growth and yield information is therefore limited or nonexistent. Presented here are the first polymorphic site index (height-age) curves and height-diameter functions for predicting height and volume for Alaska black spruce. Models are accurate for trees up to 50 feet in height and 8 inches DBH. Predicted stem volumes range from 0.006 ft3 to 21.8 ft3 for trees between 0.5 and 11.5 inches DBH Sampled tree dimensions range from 5.5 to 78.0 feet tall and from 0.4 to 11.0 inches DBH. Sampled breast-height ages range from 49 to 257 years; average age-to-breast-height is 26 years. This research, although limited, also characterizes general stand-level structure and community composition for Alaska black spruce. 60 Permanent Sample Plots (PSPs) representing 20 stands were established throughout the Tanana Valley, with stand inventory conducted according to a consistent protocol. Stand densities range from 137 to 2,907 trees per acre; stand volumes ranged from 8 to 2,507 ft3 per acre. Stand density index values range from 6 to 453. Periodic remeasurement of PSPs will yield valuable information about stand evolution and community type change"--Leaf iii.
Download or read book Trees of the Great Basin written by Ronald M. Lanner and published by . This book was released on 1984 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the Great Basin is often thought of as a vast and barren desert, the massive mountain ranges that mark its boundaries and interior are home to a diverse group of trees which represent an important and beautiful part of the complex network of living organisms that enrich the Basin environment.
Download or read book Plant Molecular Evolution written by J.J. Doyle and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant molecular biology has produced an ever-increasing flood of data about genes and genomes. Evolutionary biology and systematics provides the context for synthesizing this information. This book brings together contributions from evolutionary biologists, systematists, developmental geneticists, biochemists, and others working on diverse aspects of plant biology whose work touches to varying degrees on plant molecular evolution. The book is organized in three parts, the first of which introduces broad topics in evolutionary biology and summarizes advances in plant molecular phylogenetics, with emphasis on model plant systems. The second segment presents a series of case studies of gene family evolution, while the third gives overviews of the evolution of important plant processes such as disease resistance, nodulation, hybridization, transposable elements and genome evolution, and polyploidy.
Download or read book Washington Soils written by Elton Fulmer and published by . This book was released on 1894 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Ecoregion based Height diameter Models and Reference age Invariant Polymorphic Height and Site Index Curves for Black Spruce and Jack Pine in Manitoba microform written by Wenli Xu and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eight different height-diameter models, five height prediction models with stand variables as predictors and six height and site index models were selected, examined, compared and developed for black spruce (Picea mariana [Mill.] B.S.P.) and jack pine (Pinus banksiana Lamb.) in Manitoba. Eight different height-diameter models were fitted using nonlinear modeling techniques and compared in each of the five ecoregions in Manitoba: Churchill River Upland (Ecoregion 88); Hayes River Upland (Ecoregion 89); Lac Seul Upland (Ecoregion 90); Lake of the Woods (Ecoregion 91); Mid-Boreal Lowland (Ecoregion 148). Results suggested that the Weibull-type and Chapman-Richards models were the most suitable models. Differences of the height-diameter relationship among and between ecoregions were tested. Testing results suggested that height-diameter models significantly differred between ecoregions, indicating ecoregion-based or 'local' height-diameter models are needed for prediction purposes. The ecoregion-based height-diameter models developed in this study may provide more accurate information for developing forest growth and yield models. Five height prediction models were examined with the addition of stand density variables into the base height-diameter model. Adding stand variable resulted in increased prediction accuracy. Six height and site index models were examined and compared for black spruce and jack pine based on the provincial stem analysis data and the most suitable models were selected for Manitoba and the provincial height and site index prediction tables were produced.
Download or read book Hemlock Dwarf Mistletoe written by Paul E. Hennon and published by . This book was released on 2001 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Ecoregion based Height diameter Models and Reference age Invariant Polymorphic Height and Site Index Curves for Black Spruce and Jack Pine in Manitoba written by Wenli Xu and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eight different height-diameter models, five height prediction models with stand variables as predictors and six height and site index models were selected, examined, compared and developed for black spruce (Picea mariana [Mill.] B.S.P.) and jack pine (Pinus banksiana Lamb.) in Manitoba. Eight different height-diameter models were fitted using nonlinear modeling techniques and compared in each of the five ecoregions in Manitoba: Churchill River Upland (Ecoregion 88); Hayes River Upland (Ecoregion 89); Lac Seul Upland (Ecoregion 90); Lake of the Woods (Ecoregion 91); Mid-Boreal Lowland (Ecoregion 148). Results suggested that the Weibull-type and Chapman-Richards models were the most suitable models. Differences of the height-diameter relationship among and between ecoregions were tested. Testing results suggested that height-diameter models significantly differred between ecoregions, indicating ecoregion-based or 'local' height-diameter models are needed for prediction purposes. The ecoregion-based height-diameter models developed in this study may provide more accurate information for developing forest growth and yield models. Five height prediction models were examined with the addition of stand density variables into the base height-diameter model. Adding stand variable resulted in increased prediction accuracy. Six height and site index models were examined and compared for black spruce and jack pine based on the provincial stem analysis data and the most suitable models were selected for Manitoba and the provincial height and site index prediction tables were produced.
Download or read book Two Methods of Preparing Site Index Curves for Black Spruce written by D. Craig Sutherland and published by . This book was released on 1979 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
