scholarly journals Allometric Equations for the Aboveground Biomass of Selected Common Eastern Hardwood Understory Species

2010 ◽  
Vol 27 (4) ◽  
pp. 160-165 ◽  
Author(s):  
Yvette L. Dickinson ◽  
Eric K. Zenner
Keyword(s):  
Aboveground Biomass ◽  
Dry Weight ◽  
Vaccinium Corymbosum ◽  
Allometric Equations ◽  
Forest Understory ◽  
Rosa Multiflora ◽  
Basal Diameter ◽  
Understory Species ◽  
Elaeagnus Umbellata ◽  
Fit Index

Abstract Allometric equations were formulated for predicting the aboveground biomass of six groups of forest understory species (Elaeagnus umbellata Thunb.], blueberry [Vaccinium angustifolium Aiton, Vaccinium corymbosum L., and Vaccinium pallidum Aiton], hawthorn [Crataegus spp.], honeysuckle [Lonicera spp.], multiflora rose [Rosa multiflora Thunb.], and viburnum [Viburnum acerifolium L. and Viburnum dentatum L.]) common to Eastern hardwoods using basal diameter and/or height. As measured by fit index, basal diameter or height alone explained between 51 and 93% of the variation in oven-dry weight; this increased to 75‐96% when both basal diameter and height were used as predictors. Data were collected at four sites throughout Pennsylvania, but an evaluation of the importance of site as a blocking factor found site not to be statistically significant; therefore, the equations presented here may be used in a variety of forested sites within the greater mid-Atlantic region.

Contrasting responses of lichens and Vaccinium angustifolium to long-term acidification of a boreal forest ecosystem

1989 ◽  
Vol 67 (2) ◽  
pp. 579-588 ◽  
Author(s):  
Martha G. Scott ◽  
Thomas C. Hutchinson ◽  
Marilyn J. Feth
Keyword(s):  
Boreal Forest ◽  
Growth Parameters ◽  
Light Attenuation ◽  
Net Photosynthesis ◽  
Dry Weight ◽  
Forest Understory ◽  
Permanent Plots ◽  
Percent Cover ◽  
Vaccinium Angustifolium ◽  
Understory Species

Over a 5-year period, we investigated the effects of simulated acidic precipitation on boreal forest understory species. Percent cover, net photosynthetic rate, and growth of three species of subarctic lichens were evaluated. Throughout the growing season, Cladina stellaris, Cladina rangiferina, and Cladina mitis, along with the associated vascular perennial, Vaccinium angustifolium, received twice-monthly sprays of artificial rain adjusted to pH 5.6, 4.0, 3.5, 3.0, or 2.5 using a 2:1 ratio of sulfuric to nitric acids. Changes in percent cover of the flora in permanent plots were measured annually during treatment years and then for a 6th year to monitor postspray recovery. Following 5 years of spraying, combined cover values for the three lichen species had decreased by up to 27% in plots sprayed with rain of less than pH 4.0, while percent cover of V. angustifolium had increased by 55 %. Although losses in net photosynthesis of 65% occurred for lichens receiving rains of pH 2.5, differences were not significant and data were highly variable. However, increasing acidity of the sprays significantly suppressed mean podetial height and dry weight of C. stellaris and C. mitis. The effect on these lichens of shading by the potential competitor V. angustifolium was investigated in a companion study, and it was concluded that the growth suppression of C. stellaris was most likely related to rainfall acidity and not to light attenuation. Cladina mitis was more sensitive to low light levels. Although adversely affected by rain of pH 2.5, C. rangiferina showed stimulation of a number of growth parameters in plots sprayed with rain of pH 3.0. It was concluded that responses of boreal understory species are variable and complex, and that several species (i.e., C. rangiferina and V. angustifolium) are tolerant of rainfall of less than pH 3.5.

Biomass of understory species of Pinus halepensis Mill. forests in the Kassandra Peninsula - Chalkidiki

1998 ◽  
Vol 63 ◽  
Author(s):  
P. Smiris ◽  
F. Maris ◽  
K. Vitoris ◽  
N. Stamou ◽  
P. Ganatsas
Keyword(s):  
Moisture Content ◽  
Aboveground Biomass ◽  
Quercus Ilex ◽  
Pinus Halepensis ◽  
Biomass Estimation ◽  
Regression Equations ◽  
Pistacia Lentiscus ◽  
Quercus Coccifera ◽  
Understory Species ◽  
Cistus Incanus

This  study deals with the biomass estimation of the understory species of Pinus halepensis    forests in the Kassandra peninsula, Chalkidiki (North Greece). These  species are: Quercus    coccifera, Quercus ilex, Phillyrea media, Pistacia lentiscus, Arbutus  unedo, Erica arborea, Erica    manipuliflora, Smilax aspera, Cistus incanus, Cistus monspeliensis,  Fraxinus ornus. A sample of    30 shrubs per species was taken and the dry and fresh weights and the  moisture content of    every component of each species were measured, all of which were processed  for aboveground    biomass data. Then several regression equations were examined to determine  the key words.

scholarly journals Biomass Equations for 24 Understory Species in Coniferous and Broadleaved Mixed Forests in Northeastern China

2016 ◽  
Author(s):  
Huaijiang He ◽  
Chunyu Zhang ◽  
Fengguo Du ◽  
Xiuhai Zhao ◽  
Song Yang ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Northeastern China ◽  
Individual Species ◽  
Total Biomass ◽  
Basal Diameter ◽  
Understory Species ◽  
Crown Area ◽  
Understory Plants ◽  
Species Specific ◽  
Best Fit

Understory plants are important components of forest ecosystem productivity and diversity. Compared to biomass models of overstory canopy trees, few are available for understory saplings and shrubs and therefore their roles in estimation of forest carbon pools are often ignored. In this study, we harvested 24 understory species including 4 saplings, 9 tree-like shrubs and 11 typical shrubs in coniferous and broadleaved mixed forest in northeastern China and developed the best fit allometric equations of above- and below-ground and total biomass by species-specific or multispecies using morphological measurements of basal diameter, height and crown area as independent variables. The result showed that single basal diameter, height or crown area had good explanatory power for both species-specific and multispecies (p<0.001). The best-fit models included only basal diameter in sapling and tree-like shrubs, and combinations of crown area, height, and basal diameter in typical shrubs. The logarithmic model was most desired among the 4 model forms of linear, quadratic, multiple linear and logarithmic, for species-specific and multispecies. The models we developed should help the estimation of forest ecosystem carbon stocks, especially for belowground component, and provide tools for quantification of individual species biomass of understory plants.

scholarly journals Allometric Equation Development, Biomass, and Aboveground Productivity in Ponderosa Pine Forests, Black Hills, Wyoming

2010 ◽  
Vol 25 (3) ◽  
pp. 112-119 ◽  
Author(s):  
Daniel Tinker ◽  
Gail K. Stakes ◽  
Richard M. Arcano
Keyword(s):  
Carbon Storage ◽  
Ponderosa Pine ◽  
Aboveground Biomass ◽  
Carbon Allocation ◽  
Black Hills ◽  
Allometric Equations ◽  
Pine Forests ◽  
Mature Trees ◽  
Ponderosa Pine Forests ◽  
Aboveground Productivity

Abstract Temperate forest ecosystems continue to play an important role in the global carbon cycle, and the ability to accurately quantify carbon storage and allocation remains a critical tool for managers and researchers. This study was aimed at developing new allometric equations for predicting above- and belowground biomass of both mature trees and saplings of ponderosa pine trees in the Black Hills region of the western United States and at evaluating thinning effects on biomass pools and aboveground productivity. Study sites included three stands that had been commercially thinned and one unmanaged stand. Nine allometric equations were developed for mature trees, and six equations were developed for saplings; all models exhibited strong predictive power. The unmanaged stand contained more than twice as much total aboveground biomass as any of the thinned stands. Aboveground biomass allocation among tree compartments was similar among the three older stands but quite different from the young, even-aged stand. Stand-level aboveground net primary production was higher in the unmanaged and intensively managed stands, yet tree-level annual productivity was much lower in the unmanaged stands than in any of the managed forests, suggesting that thinning of some forest stands may increase their ability to sequester and store carbon. Our data also suggest that different management approaches did not have the same effect on carbon allocation as they did on total carbon storage capacity, but rather, stand age was the most important factor in predicting carbon allocation within individual trees and stands. Identification of the relationships between stand structure and forest management practices may help identify various management strategies that maximize rates of carbon storage in ponderosa pine forests.

Partitioning and predicting forage biomass from total aboveground biomass of regenerating tree species using dimensional analyses

2019 ◽  
Vol 49 (3) ◽  
pp. 309-316 ◽  
Author(s):  
Quinn Morgan ◽  
Tamara L. Johnstone-Yellin ◽  
Cornelia C. Pinchot ◽  
Matthew Peters ◽  
Alejandro A. Royo
Keyword(s):  
Aboveground Biomass ◽  
Habitat Structure ◽  
Average Diameter ◽  
Stem Height ◽  
Basal Diameter ◽  
Site Specific ◽  
Species Specific ◽  
And Control ◽  
Forest Renewal ◽  
Sampling Variable

Foresters and wildlife biologists use biomass estimates as proxies of habitat structure, productivity, and carrying capacity. Determining biomass, however, is challenging without destructive harvests. We provide a dimensional analysis approach to partition browse biomass (BB) from total aboveground biomass (AGB) of six regenerating hardwoods in the Allegheny forests of Pennsylvania, USA. First, we determined the average diameter of browsed twigs for each species. Then, we created a subset of potential browsable twig and foliage biomass from total AGB in 439 individuals harvested within paired exclosure (fenced) and control (unfenced) plots at 15 sites. We fit species-specific allometric equations to estimate BB and AGB using basal diameter and height as predictors and tested the effects of fencing. Although overall stem height and BB were greater within exclosures, fencing did not significantly affect relationships between either predictor and BB or AGB, thereby enabling general and robust (R2 ≥ 0.80) equations for most species. Our work provides biomass equations for regionally dominant species and size classes that are underrepresented in the literature, yet critical to forest renewal and wildlife. Moreover, by sampling variable sites and levels of browse pressure, reported equations lessen site-specific biases. Finally, our methodology provides a template to generate forage biomass prediction equations for other plant and ungulate species.

scholarly journals The effect of molybdenum and boron in soil on the growth and photosynthesis of three soybean varieties

2011 ◽  
Vol 51 (No. 5) ◽  
pp. 197-205 ◽  
Author(s):  
P. Liu ◽  
Y.S. Yang ◽  
G.D. Xu ◽  
Y.H. Shi ◽  
Y.A. Yang ◽  
...  
Keyword(s):  
Aboveground Biomass ◽  
Genotypic Variation ◽  
Dry Weight ◽  
Photosynthesis Rate ◽  
Growth Stages ◽  
Pot Experiments ◽  
Tolerant Plant ◽  
Set Up ◽  
System Volume

This paper presents a study on growth and photosynthesis response of soybean to Mo and/or B in soil. Pot experiments were set up to examine the effect of Mo and/or B on growth and photosynthesis of three soybean varieties with four treatments (control, +Mo, +B, +[Mo + B]) at various growth stages. The study showed that Mo and/or B increased main length, system volume and dry weight of the roots, aboveground biomass, leaves’ photosynthesis rate of soybean. The variation and interaction between Mo and B in soil was explored with regard to their impact on soybean growth and photosynthesis. There were some dissimilarity in growth and photosynthesis in the plants between the supplements of Mo and B in the soil, and the interrelation between Mo and B in plant and was co-supplementary to each other. Therefore, growth and photosynthesis of the soybean with Mo and B treatments were much more improved than those with Mo or B alone. Besides, some genotypic variation was found in three soybean varieties, in which Zhechun III was the most sensitive and 3811 the most tolerant plant to Mo and B.

scholarly journals Aboveground biomass allometric equations and distribution of carbon stocks of the African oak (Afzelia africana Sm.) in Burkina Faso

2019 ◽  
Vol 31 (5) ◽  
pp. 1699-1711
Author(s):  
Larba Hubert Balima ◽  
Blandine Marie Ivette Nacoulma ◽  
Philippe Bayen ◽  
Kangbéni Dimobe ◽  
François N’Guessan Kouamé ◽  
...  
Keyword(s):  
Burkina Faso ◽  
Aboveground Biomass ◽  
Carbon Stocks ◽  
Allometric Equations ◽  
Afzelia Africana

Species-specific allometric equations for improving aboveground biomass estimates of dry deciduous woodland ecosystems

2018 ◽  
Vol 30 (5) ◽  
pp. 1619-1632
Author(s):  
Amsalu Abich ◽  
Tadesse Mucheye ◽  
Mequanent Tebikew ◽  
Yohanns Gebremariam ◽  
Asmamaw Alemu
Keyword(s):  
Aboveground Biomass ◽  
Allometric Equations ◽  
Deciduous Woodland ◽  
Species Specific

scholarly journals Aboveground Biomass Estimation for Three Common Woody Species in the Post Oak Savannah of Texas

2010 ◽  
Vol 34 (2) ◽  
pp. 91-94 ◽  
Author(s):  
Brian P. Oswald ◽  
R. R. Botting ◽  
Dean W. Coble ◽  
Ken W. Farrish
Keyword(s):  
Fire Behavior ◽  
Dry Weight ◽  
Biomass Estimation ◽  
Juniperus Virginiana ◽  
Eastern Redcedar ◽  
Variable Model ◽  
Basal Diameter ◽  
Crown Area ◽  
Logarithmic Model ◽  
Post Oak

Abstract The post oak savannah of Texas contains many shrubs and trees species that lack standing biomass estimation. Nondestructive biomass prediction equations for dry weight (g) and fuel size classes (to accurately assess fuels hazards and potential fire behavior) were determined for post oak (Quercus stellata Wangenh.), eastern redcedar (Juniperus virginiana L.), and gum bumelia (Sideroxylon lanuginosum Michx. subsp. oblongifolium [Nutt] T.D. Penn) using basal diameter, height, and crown area. Five models (full model, full log model, combined variable model, logarithmic model, and combined variable model with crown area) were performed and compared. The logarithmic model provided the best results for predicting dry weight. The logarithmic model was the only one that performed well for any fuel size parameter (post oak foliage and eastern redcedar 1 hour fuel size).

Allometric equations for estimating the aboveground biomass of bamboos in northern Laos

2019 ◽  
Vol 24 (2) ◽  
pp. 115-119 ◽  
Author(s):  
Singkone Xayalath ◽  
Isao Hirota ◽  
Shinsuke Tomita ◽  
Michiko Nakagawa
Keyword(s):  
Aboveground Biomass ◽  
Allometric Equations
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