Estimation of plant biomass based on the allometric equation

Yandle, David O.; Wiant, Harry V.

doi:10.1139/x81-120

Cited by 21 publications

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“…For the purposes of the present study, a and b values are reported for the biased regression, in conjunction with the correction factor as given by Sprugel (1983). Yandle and Wiant (1981) reported that the bias B = (Yc -Y)/Yc, as a percent of the unbiased estimate is…”

Section: Discussionmentioning

confidence: 99%

“…This inherent bias has been reported by Finney (1941), but concern for its potential impact on biomass estimates was described in Madgwick (1970), Mountford and Bunce (1973) and Sprugel (1983). Several techniques for correcting the bias in logarithmic regression estimates have been reported (Baskerville 1972;Beauchamp and Olson 1973;Yandle and Wiant 1981;Sprugel 1983). For example, according to Baskerville (1972)…”

Section: Discussionmentioning

confidence: 99%

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Allometric equations for aboveground biomass estimation by size class for Pinus brutia Ten. trees growing in North and South Aegean Islands, Greece

et al. 2010

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Allometric equations for aboveground biomass estimation by size class for Pinus brutia Ten. trees growing in North and South Aegean Islands, Greece

et al. 2010

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“…Although this inherent bias has long been recognised [7], concern of its potential impact on estimates of biomass is relatively recent [10,15,26]. Several procedures for correcting bias in logarithmic regression estimates have been advocated [2,3,26,33].…”

Section: Regression Analysismentioning

confidence: 99%

“…Yandle and Wiant [33] reported that the bias , as a percent of the unbiased estimate equals to Percent bias = ((e CF -1)/e CF )100 (2) and is constant over the range of X values. Wiant and Harner [32] suggested that it is informative to express the standard error of for a given X as a percent of .…”

Section: Regression Analysismentioning

confidence: 99%

Aboveground biomass relationships for beech (Fagus moesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp.

Zianis

Mencuccini

2003

Ann. For. Sci.

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-Allometric equations describing tree size-shape relationships for beech (Fagus moesiaca Cz.) in the Vermio Mountains of Northern Greece are presented. Diameter at breast height explained most of the variability in the dependent variables (total aboveground, stem, and branch biomass), while tree height was the second most important regressor in estimating foliage mass. Equations developed in USA and Europe for Fagus spp. were also reported and validation with the field data indicated that the American regressions closely predicted total tree biomass for the study forest. In addition, the raw data were used to test a recent theoretical model and large deviations were found between theoretical and empirical values. Finally, generalised equations for Fagus spp. were developed based on these data and several other published equations. Validation of the generalised equations indicated that accurate predictions may be obtained when these regressions are applied over a broad geographical area. allometry / biomass / generalised equations / Fagus moesiaca Cz. / Northern GreeceRésumé -Relations concernant la biomasse aérienne pour le hêtre (Fagus moesiaca Cz.), dans le massif du Vermio au nord de la Grèce, et équations génériques pour Fagus sp. Dans l'article suivant sont présentées des équations allométriques décrivant les relations taille-forme pour une espèce particulière de hêtre, Fagus moesiaca (Cz.), dans le massif du Vermio, au nord de la Grèce. Le diamètre à hauteur de poitrine explique en grande partie la variabilité des variables indépendantes (biomasse aérienne totale, biomasse des tiges, biomasse des branches), tandis que la hauteur de l'arbre est la deuxième variable indépendante la plus importante lors de l'estimation de la masse du feuillage. Les équations développées aux États-Unis et en Europe pour les différentes espèces de hêtre (Fagus spp.) sont également présentées. Leur validation, obtenue avec les données recueillies sur le terrain, indique que les régressions américaines prédisent de manière précise la biomasse totale de l'arbre dans la forêt étudiée. En outre, les données de terrain ont été utilisées pour tester un modèle théorique récent, ce qui a permis de mettre en évidence de larges variations entre les valeurs théoriques et empiriques. Finalement, des équations génériques concernant Fagus spp. ont été développées à partir de ces données et de plusieurs autres équations publiées. La validation de ces équations génériques indique que des prédictions précises peuvent être obtenues quand les régressions sont appliquées à une large échelle géographique allométrie / biomasse / équations génériques / Fagus moesiaca Cz. / nord de la Grèce

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“…Come noto, tale trasformazione, pur consentendo di effettuare una regressione lineare attraverso la tra dizionale tecnica dei minimi quadrati, introduce, nella successiva fase di ri-trasformazione dei dati, un errore sistematico che richiederebbe l'impiego di un fattore di correzione calcolato attraverso l'errore standard (Yandle & Wiant 1981, Sprugel 1983.…”

Section: Peso Seccounclassified

Harvested wood products and carbon sink in a young beech high forest

Pilli¹,

Valle²,

Anfodillo³

et al. 2008

Forest@

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IntroduzioneIl Protocollo di Kyoto (PK) offre all'Italia, così come agli altri Paesi inseriti nel così detto Annesso I, la possibilità di avvalersi di una serie di attività addi zionali per il conseguimento degli obiettivi di ridu zione delle emissioni fissati a livello internazionale. Tra tali misure, previste all'art. 3.4 del Trattato, il go verno italiano ha deciso di avvalersi della sola Ge stione Forestale (Forest Management, FM) definita, ai fini dell'applicazione del PK, come un complesso di pratiche per la conduzione e l'uso sostenibile di una foresta finalizzate al conseguimento di rilevanti fun zioni ecologiche, economiche e sociali. Tali attività devono essere iniziate dopo il 1990 ed essere legate ad un'azione antropica, cioè connessa ad espliciti e diretti interventi gestionali (Ciccarese & Pettenella 2002).Secondo quanto stabilito negli Accordi di Marrake sh gli assorbimenti contabilizzati nell'ambito del FM dovranno essere ridotti dell'85% per tener conto del la naturale capacità di crescita delle foreste non ri conducibile alle pratiche colturali messe in atto dal l'uomo ed in parte imputabile alla fertilizzazione azotata legata alle stesse emissioni antropiche (Ma gnani et al. 2007). È stato inoltre fissato un limite massimo di crediti potenzialmente raggiungibili con la Gestione Forestale pari, per il nostro Paese, a 2.78 Mt di carbonio all'anno. 5: 57-67 (2008) 57 57 it).Abstract: Carbon sink in a managed beech high forest in NE Italy. According to art. 3.4 of the Kyoto Protocol (KP), Italy has elected forest management as additional human-induced activity to attain the goal of reduc tion in greenhouse gas emissions. The whole forest area not subjected to afforestation, reforestation or defo restation processes since 1990 will be considered as managed forest. In order to analyse different manage ment strategies, the Carbon-Pro Project, involving 9 partners of the European CADSES area, considered a young beech high forest (ex-coppice, defined as "transitory silvicultural system") as a common case study for the Pre-alps region. Using data collected with forest plans during the period 1983 -2005, aboveground and belowground forest carbon stock and sink of a specific forest compartment were estimated by the Car bon Stock Method proposed by the IPCC Guidelines. In order to apply this approach 41 trees were cut and a species-specific allometric equation was developed. Considering the aboveground tree biomass, the carbon sink amounts to 1.99 and 1.84 Mg C ha for the period 1983 -1994 and 1994 -2005 respectively. Adding the belowground tree biomass, the estimated sink amounts to 2.59 and 2.39 Mg C ha . The case study highlights the possible rules for the different management strategies. In effect, the utilisation of the entire increase in aboveground biomass as firewood gives an energy substitution effect but, according to the Marrakesh Accords, it cannot be accounted for the KP. On the other hand, an accumula tion strategy gives the maximum possible carbon absorption and retention.Keywords: Kyo...

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Estimation of plant biomass based on the allometric equation

Cited by 21 publications

References 0 publications

Allometric equations for aboveground biomass estimation by size class for Pinus brutia Ten. trees growing in North and South Aegean Islands, Greece

Allometric equations for aboveground biomass estimation by size class for Pinus brutia Ten. trees growing in North and South Aegean Islands, Greece

Aboveground biomass relationships for beech (Fagus moesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp.

Harvested wood products and carbon sink in a young beech high forest

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