Download or read book Comparing Algorithms for Estimating Foliar Biomass of Conifers in the Pacific Northwest written by Crystal Lynn Raymond and published by . This book was released on 2013 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate estimates of foliar biomass (FB) are important for quantifying carbon storage in forest ecosystems, but FB is not always reported in regional or national inventories. Foliar biomass also drives key ecological processes in ecosystem models. Published algorithms for estimating FB in conifer species of the Pacific Northwest can yield signifi cantly different results, but have not been rigorously compared for species other than Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). We compared five algorithms for estimating FB for seven common coniferous species in the Pacific Northwest. Algorithms based on diameter at breast height (DBH), or on DBH and height, consistently yield higher estimates of FB than algorithms based on sapwood area. At the tree level, differences between algorithms increased with increasing DBH for all species, but their order and magnitude differed by species. At the stand level, differences among algorithms were muted by the mix of species and diameter classes that contributed to total FB of stands of different seral stages and species composition. Significant differences among estimates of FB from different algorithms show the need for consistent methods for estimating FB for carbon accounting, tests of the sensitivity of ecosystem models to these differences, and more field observations to compare algorithms.

Download or read book General Technical Report PNW GTR written by and published by . This book was released on 1994 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Note PNW written by and published by . This book was released on 1982 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimating Tree Biomass Regressions and Their Error written by and published by . This book was released on 1987 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop co-sponsored by the USDA Forest Service, the State University of New York, and the Society of American Foresters. Presented were papers on the methodology of sample tree selection, tree biomass measurement, construction of biomass tables and estimation of their error, and combining the error of biomass tables with that of the sample plots or points. Also presented were papers on various aspects of biomass research currently being conducted in the United States, Canada, and abroad.

Download or read book Software for Computing Plant Biomass BIOPAK Users Guide written by and published by . This book was released on 1994 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Leaf Area Determinations for Subalpine Tree Species in the Central Rocky Mountains written by Merrill R. Kaufmann and published by . This book was released on 1982 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Conference on Coastal Watersheds written by and published by . This book was released on 1998 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Autoecology and Ecophysiology of Woody Shrubs and Trees written by Ratikanta Maiti and published by John Wiley & Sons. This book was released on 2016-05-23 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest trees and shrubs play vital ecological roles, reducing the carbon load from the atmosphere by using carbon dioxide in photosynthesis and by the storage of carbon in biomass and wood as a source of energy. Autoecology deals with all aspects of woody plants; the dynamism of populations, physiological traits of trees, light requirements, life history patterns, and physiological and morphological characters. Ecophysiology is defined by various plant growth parameters such as leaf traits, xylem water potential, plant height, basal diameter, and crown architecture which are, in turn, influenced by physiological traits and environmental conditions in the forest ecosystem. In short, this book details research advances in various aspects of woody plants to help forest scientists and foresters manage and protect forest trees and plan their future research. Autoecology and Ecophysiology of Woody Shrubs and Trees is intended to be a guide for students of woody plant autoecology and ecophysiology, as well as for researchers in this field. It is also an invaluable resource for foresters to assist in effective management of forest resources.

Download or read book Predicting Crown Weight and Bole Volume of Five Western Hardwoods written by J. A. Kendall Snell and published by . This book was released on 1983 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wildlife Habitats in Managed Rangelands written by Chris Maser and published by . This book was released on 1983 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeochemical Investigations of Terrestrial Freshwater and Wetland Ecosystems across the Globe written by R. Kelman Wieder and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here is a collection of papers from BIOGEOMON, The Fourth International Symposium on Ecosystem Behavior. The contributions address a wider-than-ever range of concerns: aspects of catchment monitoring and modeling; nitrogen transformations and processes; stable and radiogenic isotopes; biogeochemistry of restored ecosystems; and the dynamics of such chemicals as mercury and phosphorous, among many other topics.

Download or read book Research Paper RM written by and published by . This book was released on 1981 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biofuels Technical Information Guide written by and published by . This book was released on 1989 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Restoration and Reclamation of Boreal Ecosystems written by Dale Vitt and published by Cambridge University Press. This book was released on 2012-09-20 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boreal ecosystems contain one-third of the world's forests and stored carbon, but these regions are under increasing threat from both natural and anthropogenic disturbances. Written by leaders from the forefront of private, public and academic sectors, Restoration and Reclamation of Boreal Ecosystems emphasises a broad, conceptual approach to the specific application of empirical research into development planning, restoration and modelling of these ecosystems. The importance of this is highlighted at a time of global climate change, as these ecosystems act as carbon sinks. There is a focus on the reclamation of exploited ecosystems from a holistic standpoint, ranging from environmental and edaphic variables to the restoration of keystone flora. Recent advances in quantification of ecosystem services, such as habitat suitability and carbon storage modelling, are also detailed. The book contains case-studies which address how both historical and novel assemblages can provide ecosystem stability under projected climatic and land-use scenarios.

Download or read book Acidic Precipitation written by H.C. Martin and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 2096 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the beginning of the 1980's, research has continued to clarify and improve our understanding of the problern of the ecological impact of acidic precipitation. From September 15-20, 1985, Canada convened the the Muskoka Symposium on Acidic Precipitation to review progress and help chart the direction of future studies. The Conference was held in central Ontario, Canada, a region of heavy sulphate deposition where aquatic effects are evident. Approximately 700 people attended, over 500 of whom were research scientists. Over 400 papers were presented. Nearly 200 of the papers are included in these proceedings, which tagether give the present state of the art of acid rain research. The Conference focused on atmospheric science and aquatic and terrestrial effects. I have made some general observations on progress in clarifying issues and linkages between these areas of research. Out standing issues which require a great deal more work are identified. These are my views, influenced by personal bias and limited by my expertise. Atmospheric Seiences Three aspects were covered: measurement techniques, the actual measure ments, and source-receptor relationships.

Download or read book Comprehensive Database of Diameter based Biomass Regressions for North American Tree Species written by Jennifer Caroline Jenkins and published by . This book was released on 2004 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A database consisting of 2,640 equations compiled from the literature for predicting the biomass of trees and tree components from diameter measurements of species found in North America. Bibliographic information, geographic locations, diameter limits, diameter and biomass units, equation forms, statistical errors, and coefficients are provided for each equation, along with examples of how to use the database. The CD-ROM included with the paper version of this publication contains the complete database (Table 3) in spreadsheet format (Microsoft Excel 2002® with Windows XP®). The database files can also be viewed in both spreadsheet and pdf formats by directing your browser to the Global Change page at http://www.fs.fed.us/ne/global/pubs/books/index.html