Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations

[EN] The mild climate and, in recent decades, the increased demand for timber have favoured the establishment of extensive plantations of fast-growing species such as Pinus radiata in Galicia (a fire-prone region in northwestern Spain). This species is characterised by very poor self-pruning; unmana...

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Autores: Alonso Rego, Cecilia, Fernandes, Paulo, Álvarez González, Juan Gabriel, Arellano Pérez, Stefano, Ruiz Gonzalez, Ana Daría
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Recursos:Universidad de León
Repositorio:BULERIA. Repositorio Institucional de la Universidad de León
OAI Identifier:oai:buleria.unileon.es:10612/23983
Acesso em linha:https://www.mdpi.com/1999-4907/13/10/1697
https://hdl.handle.net/10612/23983
Access Level:acceso abierto
Palavra-chave:Ingeniería forestal
Canopy base height
Canopy fuel load
Canopy bulk density
Crown-fire hazard
Pure even-aged stands
Forest management
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spelling Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata PlantationsAlonso Rego, CeciliaFernandes, PauloÁlvarez González, Juan GabrielArellano Pérez, StefanoRuiz Gonzalez, Ana DaríaIngeniería forestalCanopy base heightCanopy fuel loadCanopy bulk densityCrown-fire hazardPure even-aged standsForest management[EN] The mild climate and, in recent decades, the increased demand for timber have favoured the establishment of extensive plantations of fast-growing species such as Pinus radiata in Galicia (a fire-prone region in northwestern Spain). This species is characterised by very poor self-pruning; unmanaged pine stands have a worrying vertical continuity of fuels after crown closure because the dead lower branches accumulate large amounts of fine dead biomass including twigs and suspended needles. Despite the important contribution of these dead ladder fuels to the overall canopy biomass and to crown-fire hazards, equations for estimating these fuels have not yet been developed. In this study, two systems of equations for estimating dead ladder fuel according to size class and the vertical distribution in the first 6 m of the crown were fitted: a tree-level system based on individual tree and stand variables and a stand-level system based only on stand variables. The goodness-of-fit statistics for both model systems indicated that the estimates were robust and accurate. At the tree level, fuel biomass models explained between 35% and 59% of the observed variability, whereas cumulative fuel biomass models explained between 62% and 81% of the observed variability. On the other hand, at the stand level, fuel-load models explained between 88% and 98% of the observed variability, whereas cumulative fuel-load models explained more than 98% of the total observed variability. These systems will therefore allow managers to adequately quantify the dead ladder fuels in pure Pinus radiata stands and to identify the treatments required to reduce crown-fire hazard.SIThe Spanish Ministry of Economy, Industry, and CompetitivenessThe Portuguese Foundation for Science and TechnologyGalician Government and the EU operational program “FSE Galicia 2014–2020"MDPIProduccion VegetalEscuela de Ingeniería Agraria y Forestal2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://www.mdpi.com/1999-4907/13/10/1697https://hdl.handle.net/10612/23983reponame:BULERIA. Repositorio Institucional de la Universidad de Leóninstname:Universidad de LeónInglésGEPRIF (RTA2014-00011-c06-04)VIS4FIRE (RTA 2017-0042-C05-05)DIABOLO (GA 633464)UIDB/04033/2020European Union’s H2020 researchhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:buleria.unileon.es:10612/239832026-06-24T12:43:27Z
dc.title.none.fl_str_mv Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
title Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
spellingShingle Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
Alonso Rego, Cecilia
Ingeniería forestal
Canopy base height
Canopy fuel load
Canopy bulk density
Crown-fire hazard
Pure even-aged stands
Forest management
title_short Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
title_full Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
title_fullStr Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
title_full_unstemmed Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
title_sort Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations
dc.creator.none.fl_str_mv Alonso Rego, Cecilia
Fernandes, Paulo
Álvarez González, Juan Gabriel
Arellano Pérez, Stefano
Ruiz Gonzalez, Ana Daría
author Alonso Rego, Cecilia
author_facet Alonso Rego, Cecilia
Fernandes, Paulo
Álvarez González, Juan Gabriel
Arellano Pérez, Stefano
Ruiz Gonzalez, Ana Daría
author_role author
author2 Fernandes, Paulo
Álvarez González, Juan Gabriel
Arellano Pérez, Stefano
Ruiz Gonzalez, Ana Daría
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Produccion Vegetal
Escuela de Ingeniería Agraria y Forestal
dc.subject.none.fl_str_mv Ingeniería forestal
Canopy base height
Canopy fuel load
Canopy bulk density
Crown-fire hazard
Pure even-aged stands
Forest management
topic Ingeniería forestal
Canopy base height
Canopy fuel load
Canopy bulk density
Crown-fire hazard
Pure even-aged stands
Forest management
description [EN] The mild climate and, in recent decades, the increased demand for timber have favoured the establishment of extensive plantations of fast-growing species such as Pinus radiata in Galicia (a fire-prone region in northwestern Spain). This species is characterised by very poor self-pruning; unmanaged pine stands have a worrying vertical continuity of fuels after crown closure because the dead lower branches accumulate large amounts of fine dead biomass including twigs and suspended needles. Despite the important contribution of these dead ladder fuels to the overall canopy biomass and to crown-fire hazards, equations for estimating these fuels have not yet been developed. In this study, two systems of equations for estimating dead ladder fuel according to size class and the vertical distribution in the first 6 m of the crown were fitted: a tree-level system based on individual tree and stand variables and a stand-level system based only on stand variables. The goodness-of-fit statistics for both model systems indicated that the estimates were robust and accurate. At the tree level, fuel biomass models explained between 35% and 59% of the observed variability, whereas cumulative fuel biomass models explained between 62% and 81% of the observed variability. On the other hand, at the stand level, fuel-load models explained between 88% and 98% of the observed variability, whereas cumulative fuel-load models explained more than 98% of the total observed variability. These systems will therefore allow managers to adequately quantify the dead ladder fuels in pure Pinus radiata stands and to identify the treatments required to reduce crown-fire hazard.
publishDate 2022
dc.date.none.fl_str_mv 2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.mdpi.com/1999-4907/13/10/1697
https://hdl.handle.net/10612/23983
url https://www.mdpi.com/1999-4907/13/10/1697
https://hdl.handle.net/10612/23983
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv GEPRIF (RTA2014-00011-c06-04)
VIS4FIRE (RTA 2017-0042-C05-05)
DIABOLO (GA 633464)
UIDB/04033/2020
European Union’s H2020 research
dc.rights.none.fl_str_mv http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:BULERIA. Repositorio Institucional de la Universidad de León
instname:Universidad de León
instname_str Universidad de León
reponame_str BULERIA. Repositorio Institucional de la Universidad de León
collection BULERIA. Repositorio Institucional de la Universidad de León
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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