Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest

14 Pág.

Detalles Bibliográficos
Autores: Aponte, Cristina, Tolhurst, Kevin G., Bennett, Lauren T.
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/344252
Acceso en línea:http://hdl.handle.net/10261/344252
https://api.elsevier.com/content/abstract/scopus_id/84903826708
Access Level:acceso abierto
Palabra clave:Carbon C
Char
Coarse woody debris quality
Eucalypt forest
Fire regime
Nitrogen N
Prescribed fire frequency
Prescribed fire season
Pyrogenic carbon
Southeastern Australia
Wood decay
Wood density
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spelling Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forestAponte, CristinaTolhurst, Kevin G.Bennett, Lauren T.Carbon CCharCoarse woody debris qualityEucalypt forestFire regimeNitrogen NPrescribed fire frequencyPrescribed fire seasonPyrogenic carbonSoutheastern AustraliaWood decayWood density14 Pág.Previous studies have found negligible effects of single prescribed fires on coarse woody debris (CWD), but the cumulative effects of repeated low-intensity prescribed fires are unknown. This represents a knowledge gap for environmental management because repeated prescribed fires are a key tool for mitigating wildfire risk, and because CWD is recognized as critical to forest biodiversity and functioning. We examined the effects of repeated low-intensity prescribed fires on the attributes and stocks of (fallen) CWD in a mixed-species eucalypt forest of temperate Australia. Prescribed fire treatments were a factorial combination of two seasons (Autumn, Spring) and two frequencies (three yearly High, 10 yearly Low), were replicated over five study areas, and involved two to seven low-intensity fires over 27 years. Charring due to prescribed fires variously changed carbon and nitrogen concentrations and C to N ratios of CWD pieces depending on decay class, but did not affect mean wood density. CWD biomass and C and N stocks were significantly less in Fire than Control treatments. Decreases in total CWD C stocks of -8 Mg/ha in Fire treatments were not balanced by minor increases in pyrogenic (char) C (-0.3 Mg/ha). Effects of prescribed fire frequency and season included significantly less C and N stocks in rotten CWD in High than Low frequency treatments, and in the largest CWD pieces in Autumn than Spring treatments. Our study demonstrates that repeated low-intensity prescribed fires have the potential to significantly decrease CWD stocks, in pieces of all sizes and particularly decayed pieces, and to change CWD chemical attributes. CWD is at best a minor stock of pyrogenic C under such fire regimes. These findings suggest a potential trade-off in the management of temperate eucalypt forests between sustained reduction of wildfire risk, and the consequences of decreased CWD C stocks, and of changes in CWD as a habitat and biogeochemical substrate. Nonetheless, negative impacts on CWD of repeated low-intensity prescribed fires could be lessened by fire intervals of 10 rather than three years (to decrease losses of decayed CWD), and fires in moist rather than dry conditions (to conserve large CWD).This work was funded by Victorian Department of Environment and Primary Industries (DEPI). We thank many personnel from DEPI's (then) Environmental Policy and Climate Change, Land and Fire, and Forests and Parks Divisions for supporting this study's measurements. We also thank many current and past staff from the regional DEPI, and from the University of Melbourne for maintaining, measuring, and documenting the prescribed fire treatments for over two decades, including J. Kellas, D. Oswin, A. Ashton, J. Najera, B. Smith, T. Baker, and M. Löw.NoJohn Wiley & SonsDepartment of Environment and Primary Industries (Australia)University of MelbourneAponte, Cristina [0000-0002-8457-7573]Tolhurst, Kevin G. [0000-0003-3094-1867]Bennett, Lauren T. [0000-0003-2472-062X]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/344252https://api.elsevier.com/content/abstract/scopus_id/84903826708reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésDepartamento de Medio Ambiente y Agronomía​https://doi.org/10.1890/13-1426.1open_in_newISSN1051-0761Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3442522026-05-22T06:33:51Z
dc.title.none.fl_str_mv Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
title Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
spellingShingle Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
Aponte, Cristina
Carbon C
Char
Coarse woody debris quality
Eucalypt forest
Fire regime
Nitrogen N
Prescribed fire frequency
Prescribed fire season
Pyrogenic carbon
Southeastern Australia
Wood decay
Wood density
title_short Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
title_full Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
title_fullStr Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
title_full_unstemmed Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
title_sort Repeated prescribed fires decrease stocks and change attributes of coarse woody debris in a temperate eucalypt forest
dc.creator.none.fl_str_mv Aponte, Cristina
Tolhurst, Kevin G.
Bennett, Lauren T.
author Aponte, Cristina
author_facet Aponte, Cristina
Tolhurst, Kevin G.
Bennett, Lauren T.
author_role author
author2 Tolhurst, Kevin G.
Bennett, Lauren T.
author2_role author
author
dc.contributor.none.fl_str_mv Department of Environment and Primary Industries (Australia)
University of Melbourne
Aponte, Cristina [0000-0002-8457-7573]
Tolhurst, Kevin G. [0000-0003-3094-1867]
Bennett, Lauren T. [0000-0003-2472-062X]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Carbon C
Char
Coarse woody debris quality
Eucalypt forest
Fire regime
Nitrogen N
Prescribed fire frequency
Prescribed fire season
Pyrogenic carbon
Southeastern Australia
Wood decay
Wood density
topic Carbon C
Char
Coarse woody debris quality
Eucalypt forest
Fire regime
Nitrogen N
Prescribed fire frequency
Prescribed fire season
Pyrogenic carbon
Southeastern Australia
Wood decay
Wood density
description 14 Pág.
publishDate 2014
dc.date.none.fl_str_mv 2014
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Preprint
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/344252
https://api.elsevier.com/content/abstract/scopus_id/84903826708
url http://hdl.handle.net/10261/344252
https://api.elsevier.com/content/abstract/scopus_id/84903826708
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Departamento de Medio Ambiente y Agronomía​
https://doi.org/10.1890/13-1426.1open_in_newISSN1051-0761
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869420216804442112
score 15,811543

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