Regional aboveground biomass equations for North American arid and semi-arid forests

Návar, José; Ríos-Saucedo, Julio César; Pérez-Verdín, Gustavo; Rodríguez-Flores, Felipa de Jesús; Domínguez-Calleros, Pedro Antonio

doi:10.1016/j.jaridenv.2013.05.016

Cited by 20 publications

(19 citation statements)

References 24 publications

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“…In accordance with the findings of other studies [20,27,59,60] our results suggested that the heightto-diameter ratio of aspen and birch individuals significantly increases with increasing stand density. However, height-to-diameter ratio was also affected by the age of trees [61,62].…”

Section: Effects Of Stand Density and Tree Age On Allometric Relationsupporting

confidence: 93%

Allometries for Widely Spaced Populus ssp. and Betula ssp. in Nurse Crop Systems

Stark

Nothdurft²,

Bauhus

2013

Forests

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Nurse crops of widely spaced pioneer trees are a silvicultural approach to protect the regeneration of frost sensitive target tree species. If overstorey nurse crops are harvested, they can provide additional short-term benefits through increased biomass production, e.g., for bioenergy. However, the intensification of biomass exports from forests might impact negatively on ecosystem nutrient pools. Thus, precise allometric biomass equations are required to quantify biomass and nutrient removals. Since an analysis of published allometric equations developed for typical, dense aspen or birch forests showed that the tree height-to-diameter ratio correlated positively and the proportion of branch biomass negatively with stand density, we developed new allometric biomass equations for widely spaced aspen and birch growing at 4 × 4 m spacing. These equations yielded a root mean squared error of 13% when predicting total aboveground woody biomass for our sample trees. In contrast, the corresponding root mean squared error produced by allometric biomass equations from the literature ranged between 17% to 106% of actual dry biomass. Our results show that specific allometric biomass equations are needed for widely spaced pioneer trees both for accurate estimates of biomass and the nutrients contained within.

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Section: Effects Of Stand Density and Tree Age On Allometric Relationsupporting

confidence: 93%

Allometries for Widely Spaced Populus ssp. and Betula ssp. in Nurse Crop Systems

Stark

Nothdurft²,

Bauhus

2013

Forests

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“…However, the potential for this is much less in shrublands because size differences between individual stems are much less pronounced. Further, recent evidence suggests that more sophisticated allometric approaches than the one we used could considerably reduce uncertainty in C storage estimates [15]. Thus, overall it seems we can be fairly confident that our analyses have captured the majority of the true uncertainty in C storage estimates.…”

Section: Discussionmentioning

confidence: 63%

“…This may have serious consequences for plot-level C storage estimates in forests, since the largest individuals within a plot usually contribute the vast majority of aboveground carbon [22]. There is some evidence this may also be true for shrublands [15], but for now there is too little evidence to be sure.…”

Section: Potential Sources Of Uncertaintymentioning

confidence: 99%

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Individual-Based Allometric Equations Accurately Measure Carbon Storage and Sequestration in Shrublands

Mason

Beets

Payton

et al. 2014

Forests

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Abstract:Many studies have quantified uncertainty in forest carbon (C) storage estimation, but there is little work examining the degree of uncertainty in shrubland C storage estimates. We used field data to simulate uncertainty in carbon storage estimates from three error sources: (1) allometric biomass equations; (2) measurement errors of shrubs harvested for the allometry; and (3) measurement errors of shrubs in survey plots. We also assessed uncertainty for all possible combinations of these error sources. Allometric uncertainty had the greatest independent effect on C storage estimates for individual plots. The largest error arose when all three error sources were included in simulations (where the 95% confidence interval spanned a range equivalent to 40% of mean C storage). Mean C sequestration (1.73 Mg C ha -1 year -1) exceeded the margin of error produced by the simulated sources of uncertainty. This demonstrates that, even when the major sources of uncertainty were accounted for, we were able to detect relatively modest gains in shrubland C storage.

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“…Also, equations that use total height (TH) and DBH as independent variables are generally more widely applicable than equations with only DBH, as these may capture better the variation in the DBH/TH ratio due to ecological conditions. Návar et al (2013) found that other more complex variables such as tree slenderness (DBH/TH), tree cylindrical (VOL/ (DBH 2 TH)) or a compound form factor (DBH/TH*VOL/ (DBH 2 TH)) explain much more above-ground variability than H alone, and avoid multicollinearity problems. Furthermore, height is often difficult to measure, particularly in dense tropical forests.…”

Section: Discussionmentioning

confidence: 99%

Database of 478 allometric equations to estimate biomass for Mexican trees and forests

Rojas-García¹,

Jong

Martínez‐Zurimendi

et al. 2015

Annals of Forest Science

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International audienceKey messageWe present a comprehensive database of 478 allometric equations to estimate biomass of trees and other life forms in Mexican forest and scrubland ecosystems.ContextAccurate estimation of standing biomass in forests is a prerequisite for any approach to carbon storage and a number of additional applications.AimsTo provide a comprehensive database with allometric equations applicable to a large number of tree and shrub species of Mexico.MethodsAn intensive literature search was carried out to pull together all publications related to allometric equations in the libraries of the most important forest research institutes across Mexico and the neighboring countries.ResultsA total of 478 equations were compiled. Four hundred fourteen equations included a detailed analysis of all compartments of the trees; 7 equations applied to shrubs, 15 to bamboos, and 2 to palms. The collected equations are applicable to a wide variety of forest ecosystems in Mexico ranging from desert scrublands in the North to lowland evergreen rainforests in the South. The attached database of allometric equations is possibly the most extensive compilation of equations currently available for Mexico.ConclusionThe database covers almost 100 % of the individuals recorded in the National Forest Inventory

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Regional aboveground biomass equations for North American arid and semi-arid forests

Cited by 20 publications

References 24 publications

Allometries for Widely Spaced Populus ssp. and Betula ssp. in Nurse Crop Systems

Allometries for Widely Spaced Populus ssp. and Betula ssp. in Nurse Crop Systems

Individual-Based Allometric Equations Accurately Measure Carbon Storage and Sequestration in Shrublands

Database of 478 allometric equations to estimate biomass for Mexican trees and forests

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