Comparing Algorithms for Estimating Foliar Biomass of Conifers in the Pacific Northwest

Comparing Algorithms for Estimating Foliar Biomass of Conifers in the Pacific Northwest PDF Author: Crystal Lynn Raymond
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 36

Get Book Here

Book Description
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.

Comparing Algorithms for Estimating Foliar Biomass of Conifers in the Pacific Northwest

Comparing Algorithms for Estimating Foliar Biomass of Conifers in the Pacific Northwest PDF Author: Crystal Lynn Raymond
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 36

Get Book Here

Book Description
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.

Comparing algorithms for estimating foliar biomass of conifers in the Pacific Northwest

Comparing algorithms for estimating foliar biomass of conifers in the Pacific Northwest PDF Author: Crystal Lynn Raymond
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 23

Get Book Here

Book Description
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.

Comparing algorithms for estimating foliar biomass of conifers in the Pacific Northwest

Comparing algorithms for estimating foliar biomass of conifers in the Pacific Northwest PDF Author: Crystal Lynn Raymond
Publisher:
ISBN:
Category : Conifers
Languages : en
Pages : 23

Get Book Here

Book Description
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.

Research Paper PNW.

Research Paper PNW. PDF Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 108

Get Book Here

Book Description


Chicago's Urban Forest Ecosystem

Chicago's Urban Forest Ecosystem PDF Author: E. Gregory McPherson
Publisher:
ISBN:
Category : Energy conservation
Languages : en
Pages : 212

Get Book Here

Book Description


Lower Midwest Community Tree Guide

Lower Midwest Community Tree Guide PDF Author: Paula J. Peper
Publisher: Createspace Independent Pub
ISBN: 9781480164918
Category : Nature
Languages : en
Pages : 126

Get Book Here

Book Description
Even as they increase the beauty of our surroundings, trees provide us with a great many ecosystem services, including air quality improvement, energy conservation, stormwater interception, and atmospheric carbon dioxide reduction. These benefits must be weighed against the costs of maintaining trees, including planting, pruning, irrigation, administration, pest control, liability, cleanup, and removal. We present benefits and costs for representative small, medium, and large deciduous trees in the Lower Midwest region derived from models based on in-depth research carried out in Indianapolis, Indiana. Average annual net benefits increase with tree size and differ based on location. Two hypothetical examples of planting projects are described to illustrate how the data in this guide can be adapted to local uses, and guidelines for maximizing benefits and reducing costs are given.

Forest Succession

Forest Succession PDF Author: D. C. West
Publisher: Springer Science & Business Media
ISBN: 1461259509
Category : Science
Languages : en
Pages : 530

Get Book Here

Book Description
Succession-nothing in plant, community, or ecosystem ecology has been so elaborated by terminology, so much reviewed, and yet so much the center of controversy. In a general sense, every ecologist uses the concept in teaching and research, but no two ecologists seem to have a unified concept of the details of succession. The word was used by Thoreau to describe, from a naturalist's point of view, the general changes observed during the transition of an old field to a forest. As data accumulated, a lengthy taxonomy of succession developed around early twentieth century ecologists such as Cooper, Clements, and Gleason. Now, nearer the end of the century, and after much discussion concerning the nature of vegetation communities, where do ecologists stand with respect to knowledge of ecological succession? The intent of this book is not to rehash classic philosophies of succession that have emerged through the past several decades of study, but to provide a forum for ecologists to present their current research and present-day interpretation of data. To this end, we brought together a group of scientists currently studying terrestrial plant succession, who represent research experience in a broad spectrum of different ecosystem types. The results of that meeting led to this book, which presents to the reader a unique summary of contemporary research on forest succession.

The Potential Effects of Global Climate Change on the United States

The Potential Effects of Global Climate Change on the United States PDF Author:
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 124

Get Book Here

Book Description


Comprehensive Database of Diameter-based Biomass Regressions for North American Tree Species

Comprehensive Database of Diameter-based Biomass Regressions for North American Tree Species PDF Author: Jennifer Caroline Jenkins
Publisher:
ISBN:
Category : Forest biomass
Languages : en
Pages : 52

Get Book Here

Book Description
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

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1572

Get Book Here

Book Description