Estimating Aboveground Tree Biomass On Forest Land In The Pacific Northwest A Comparison Of Approaches PDF Download
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Author | : |
Publisher | : DIANE Publishing |
Total Pages | : 25 |
Release | : |
Genre | : |
ISBN | : 1437983472 |
Download Estimating Aboveground Tree Biomass on Forest Land in the Pacific Northwest: A Comparison of Approaches Book in PDF, ePub and Kindle
Author | : Xiaoping Zhou |
Publisher | : |
Total Pages | : 18 |
Release | : 2009 |
Genre | : Forest biomass |
ISBN | : |
Download Estimating Aboveground Tree Biomass on Forest Land in the Pacific Northwest Book in PDF, ePub and Kindle
Live tree biomass estimates are essential for carbon accounting, bioenergy feasibility studies, and other analyses. Several models are currently used for estimating tree biomass. Each of these incorporates different calculation methods that may significantly impact the estimates of total aboveground tree biomass, merchantable biomass, and carbon pools. Consequently, carbon markets, bioenergy projects, and similar efforts may be affected. In addition to differences in allometric equations, the various methods are most suitable for particular geographic scales of analysis. We examine three approaches that might be used for midscale analyses (e.g., 25,000 to several million acres) and compare the regional models with equations developed by Jenkins et al. and with the component ratio method (CRM). These three methods produce relatively similar estimates of total aboveground biomass for softwood species in Oregon, but substantially different estimates for the proportion of total biomass that is merchantable . For the major softwood species in Oregon, the total aboveground biomass using the CRM is 3 percent lower than estimates with regional equations, and the Jenkins models produce estimates that are 17 percent higher. However, on average, the proportion of softwood merchantable biomass computed with CRM is about 83 percent of the total aboveground biomass with little variation from species to species, whereas regional models estimate that 72 percent is merchantable, and the Jenkins equations estimate that 78 percent is merchantable.
Author | : |
Publisher | : |
Total Pages | : 220 |
Release | : 1978 |
Genre | : Forests and forestry |
ISBN | : |
Download Research Paper PNW. Book in PDF, ePub and Kindle
Author | : Xiaoping Zhou |
Publisher | : |
Total Pages | : 31 |
Release | : 2010 |
Genre | : Forest biomass |
ISBN | : |
Download Timber Volume and Aboveground Live Tree Biomass Estimations for Landscape Analyses in the Pacific Northwest Book in PDF, ePub and Kindle
Timber availability, aboveground tree biomass, and changes in aboveground carbon pools are important consequences of landscape management. There are several models available for calculating tree volume and aboveground tree biomass pools. This paper documents species-specific regional equations for tree volume and aboveground live tree biomass estimation that might be used to examine consequences of midscale landscape management in the Pacific Northwest. These regional equations were applied to a landscape in the upper Deschutes study area in central Oregon. We demonstrate an analysis of the changes in aboveground tree biomass and wood product availability at the scale of several watersheds on general forest lands under an active fuel-treatment management scenario. Our approach lays a foundation for further landscape management analysis, such as financial analysis of timber product and biomass supply, forest carbon sequestration, wildlife habitat suitability, and fuel reduction related studies.
Author | : Zhou |
Publisher | : CreateSpace |
Total Pages | : 36 |
Release | : 2015-01-03 |
Genre | : |
ISBN | : 9781505913712 |
Download Timber Volume and Aboveground Live Tree Biomass Estimations for Landscapes Analyses for the Pacific Northwest Book in PDF, ePub and Kindle
Timber availability, aboveground tree biomass, and changes in aboveground carbon pools are important consequences of landscape management. There are several models available for calculating tree volume and aboveground tree biomass pools. This paper documents species-specific regional equations for tree volume and aboveground live tree biomass estimation that might be used to examine consequences of midscale landscape management in the Pacific Northwest. These regional equations were applied to a landscape in the upper Deschutes study area in central Oregon. We demonstrate an analysis of the changes in aboveground tree biomass and wood product availability at the scale of several watersheds on general forest lands under an active fuel-treatment management scenario. Our approach lays a foundation for further landscape management analysis, such as financial analysis of timber product and biomass supply, forest carbon sequestration, wildlife habitat suitability, and fuel reduction related studies.
Author | : Raffaele Spinelli |
Publisher | : MDPI |
Total Pages | : 417 |
Release | : 2018-09-19 |
Genre | : |
ISBN | : 3038971847 |
Download Forest Operations, Engineering and Management Book in PDF, ePub and Kindle
This book is a printed edition of the Special Issue "Forest Operations, Engineering and Management" that was published in Forests
Author | : John Yarie |
Publisher | : |
Total Pages | : 20 |
Release | : 1982 |
Genre | : Biomass energy |
ISBN | : |
Download Aboveground Tree Biomass on Productive Forest Land in Alaska Book in PDF, ePub and Kindle
Author | : Warren D. Devine |
Publisher | : |
Total Pages | : 29 |
Release | : 2013 |
Genre | : Douglas fir |
ISBN | : |
Download Estimating Tree Biomass, Carbon, and Nitrogen in Two Vegetation Control Treatments in an 11-year-old Douglas-fir Plantation on a Highly Productive Site Book in PDF, ePub and Kindle
We sampled trees grown with and without competing vegetation control in an 11-year-old Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) plantation on a highly productive site in southwestern Washington to create diameter- based allometric equations for estimating individual-tree bole, branch, foliar, and total aboveground biomass. We used these equations to estimate per-hectare aboveground biomass, nitrogen (N), and carbon (C) content, and compared these results to (1) estimates based on biomass equations published in other studies, and (2) estimates made using the mean-tree method rather than allometric equations. Component and total-tree biomass equations were not influenced by the presence of vegetation control, although per-hectare biomass, C, and N estimates were greater where vegetation control was applied. Our biomass estimates differed from estimates using previously published biomass equations by as much as 23 percent. When using the mean-tree biomass estimation approach, we found that incorporating a previously published biomass equation improved accuracy of the mean-tree diameter calculation.
Author | : Crystal Lynn Raymond |
Publisher | : |
Total Pages | : 36 |
Release | : 2013 |
Genre | : Conifers |
ISBN | : |
Download Comparing Algorithms for Estimating Foliar Biomass of Conifers in the Pacific Northwest Book in PDF, ePub and Kindle
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.
Author | : Jeremy Steven Fried |
Publisher | : |
Total Pages | : 32 |
Release | : 2008 |
Genre | : Carbon sequestration |
ISBN | : |
Download Forest Inventory-based Estimation of Carbon Stocks and Flux in California Forests in 1990 Book in PDF, ePub and Kindle
Estimates of forest carbon stores and flux for California circa 1990 were modeled from forest inventory data in support of California's legislatively mandated greenhouse gas inventory. Reliable estimates of live-tree carbon stores and flux on timberlands outside of national forest could be calculated from periodic inventory data collected in the 1980s and 1990s; however, estimation of circa 1990 flux on national forests and forests other than timberland was problematic owing to a combination of changing inventory protocols and definitions and the lack of remeasurement data on those land categories. We estimate annual carbon flux on the 7.97 million acres of timberlands outside of national forests (which account for 24 percent of California's forest area and 28 percent of its live tree aboveground biomass) at 2.9 terragrams per year.