Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain
The aim of this study was to develop models for above-ground biomass estimation for birch(Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in Galicia (northwest of Spain). Datafrom a destructive sampling of 50 birch trees and 50 pedunculate oak trees, that provided total dry biomasswei...
| Główni autorzy: | , , |
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| Format: | Online |
| Język: | spa |
| Wydane: |
Instituto de Ecología, A.C.
2013
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| Dostęp online: | https://myb.ojs.inecol.mx/index.php/myb/article/view/348 |
| _version_ | 1799769189051793408 |
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| author | Gómez-García, Esteban Crecente-Campo, Felipe Diéguez-Aranda, Ulises |
| author_facet | Gómez-García, Esteban Crecente-Campo, Felipe Diéguez-Aranda, Ulises |
| author_sort | Gómez-García, Esteban |
| collection | MYB |
| description | The aim of this study was to develop models for above-ground biomass estimation for birch(Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in Galicia (northwest of Spain). Datafrom a destructive sampling of 50 birch trees and 50 pedunculate oak trees, that provided total dry biomassweight and dry biomass weight by components: wood, bark, branches over 2 cm, branchesbetween 0,5 cm and 2 cm, branches under 2 cm, and leaves, was used. Different models were fitted foreach above-ground component and the best of them was chosen in a first step. All the models wererefitted simultaneously by use of Nonlinear Seemingly Unrelated Regressions (NSUR) to ensure theadditivity of the biomass equations. Weighted regression was necessary to correct the heterocedasticityof residuals. Not serious problems with multicollineality were observed. Finally, a system of seven equationsfor the different above-ground biomass components, and for the total biomass, was obtained for each species. These equations explainedat least 79% of the observed variability.For total biomass the equations explained98% and 97% of the observed variabilityfor birch and oak, respectively. The developedbiomass equations are recommendedin substitution of the existingregional biomass equations. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-348 |
| institution | Madera y Bosques |
| language | spa |
| publishDate | 2013 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-3482022-11-29T23:59:44Z Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain Tarifas de biomasa aérea para abedul (Betula pubescens Ehrh.) y roble (Quercus robur L.) en el noroeste de España Gómez-García, Esteban Crecente-Campo, Felipe Diéguez-Aranda, Ulises Addivity simultaneous fitting Galicia heterocedasticity multicollineality. Aditividad ajuste simultáneo Galicia heterocedasticidad multicolinealidad. The aim of this study was to develop models for above-ground biomass estimation for birch(Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in Galicia (northwest of Spain). Datafrom a destructive sampling of 50 birch trees and 50 pedunculate oak trees, that provided total dry biomassweight and dry biomass weight by components: wood, bark, branches over 2 cm, branchesbetween 0,5 cm and 2 cm, branches under 2 cm, and leaves, was used. Different models were fitted foreach above-ground component and the best of them was chosen in a first step. All the models wererefitted simultaneously by use of Nonlinear Seemingly Unrelated Regressions (NSUR) to ensure theadditivity of the biomass equations. Weighted regression was necessary to correct the heterocedasticityof residuals. Not serious problems with multicollineality were observed. Finally, a system of seven equationsfor the different above-ground biomass components, and for the total biomass, was obtained for each species. These equations explainedat least 79% of the observed variability.For total biomass the equations explained98% and 97% of the observed variabilityfor birch and oak, respectively. The developedbiomass equations are recommendedin substitution of the existingregional biomass equations. El objetivo de este trabajo fue el desarrollo de modelos de estimación de biomasa aérea paraabedul (Betula pubescens Ehrh.) y roble (Quercus robur L.) en Galicia (noroeste de España). Para ellose emplearon datos obtenidos mediante el muestreo destructivo de 50 abedules y 50 robles, en los quese obtuvo el peso seco de biomasa total y por fracciones: madera del fuste, corteza del fuste, ramasmayores de 2 cm, ramas de 0,5 cm a 2 cm, ramas menores de 0,5 cm, y hojas. En un primer paso seseleccionaron los modelos que presentaban el mejor ajuste para cada fracción de biomasa arbóreaconsiderada. Posteriormente, y para asegurar la aditividad, se realizó un ajuste simultáneo de las ecuacionesde estimación de biomasa por fracciones junto con la de biomasa total, empleando el procedimientoestadístico denominado NSUR (Nonlinear Seemingly Unrelated Regressions). También fuenecesario un ajuste ponderado para corregir la existencia de heterocedasticidad. El número de condiciónverificó que no existían problemas graves de multicolinealidad. Al final se obtuvo, para cada especie,un sistema de siete ecuaciones de estimación de biomasa aérea para las distintas fracciones ypara la biomasa total. Estas ecuaciones explicaron como mínimo 79% de la variabilidad observada,y en el caso de las ecuaciones de biomasa total 98% para abedul y 97% para roble. Se recomienda lautilización de las ecuaciones desarrolladas en este estudio en sustitución de las ecuaciones de biomasaexistentes para la región. Instituto de Ecología, A.C. 2013-04-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf https://myb.ojs.inecol.mx/index.php/myb/article/view/348 10.21829/myb.2013.191348 Madera y Bosques; Vol. 19 No. 1 (2013): Primavera 2013 Madera y Bosques; Vol. 19 Núm. 1 (2013): Primavera 2013 2448-7597 1405-0471 spa https://myb.ojs.inecol.mx/index.php/myb/article/view/348/530 Derechos de autor 2015 Madera y Bosques |
| spellingShingle | Gómez-García, Esteban Crecente-Campo, Felipe Diéguez-Aranda, Ulises Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain |
| title | Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain |
| title_full | Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain |
| title_fullStr | Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain |
| title_full_unstemmed | Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain |
| title_short | Above-ground biomass equations for birch (Betula pubescens Ehrh.) and pedunculate oak (Quercus robur L.) in north western Spain |
| title_sort | above-ground biomass equations for birch (betula pubescens ehrh.) and pedunculate oak (quercus robur l.) in north western spain |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/348 |
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