Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ?
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.5/5586 |
Resumo: | In the Iberian Peninsula Mediterranean oak forests have been transformed into a mosaic landscape of four main patch-types: forests, savannas, shrublands and grasslands. We used aerial photographs over a period of 45 years (1958–2002) to quantify the persistence and rates of transitions between vegetation patch-types in southern Portugal, where cork oak is the dominant tree species. We used logistic regression to relate vegetation changes with topographical features and wildfire history. Over the 45 years, shrublands have been the most persistent patch-type (59%), and have been expanding; forests are also persistent (55%) but have been decreasing since 1985; savannas and grasslands were less persistent (33% and 15%, respectively). Shrublands persistence was significantly correlated with wildfire occurrence, particularly on southern exposures after 1995. In contrast, forest persistence decreased with wildfire occurrence, and forests were more likely to change into shrublands where wildfire had occurred after 1995. |
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7160 |
spelling |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ?alternative stable statesCistusshrub encroachmentvegetation shiftsQuercus suberIn the Iberian Peninsula Mediterranean oak forests have been transformed into a mosaic landscape of four main patch-types: forests, savannas, shrublands and grasslands. We used aerial photographs over a period of 45 years (1958–2002) to quantify the persistence and rates of transitions between vegetation patch-types in southern Portugal, where cork oak is the dominant tree species. We used logistic regression to relate vegetation changes with topographical features and wildfire history. Over the 45 years, shrublands have been the most persistent patch-type (59%), and have been expanding; forests are also persistent (55%) but have been decreasing since 1985; savannas and grasslands were less persistent (33% and 15%, respectively). Shrublands persistence was significantly correlated with wildfire occurrence, particularly on southern exposures after 1995. In contrast, forest persistence decreased with wildfire occurrence, and forests were more likely to change into shrublands where wildfire had occurred after 1995.SpringerRepositório da Universidade de LisboaAcácio, VandaHolmgren, MilenaRego, Francisco CastroMoreira, FranciscoGodefridus, M.J.Mohren2013-05-29T13:10:26Z20082008-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.5/5586eng"Agroforestry Systems". ISSN 0167-4360. 76 (2009) 389-4000167-4360info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:36:27Zoai:www.repository.utl.pt:10400.5/5586Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:53:03.687225Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? |
title |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? |
spellingShingle |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? Acácio, Vanda alternative stable states Cistus shrub encroachment vegetation shifts Quercus suber |
title_short |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? |
title_full |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? |
title_fullStr |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? |
title_full_unstemmed |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? |
title_sort |
Are drought and wilfires turning Mediterranean cork oak forests into persistent shrublands ? |
author |
Acácio, Vanda |
author_facet |
Acácio, Vanda Holmgren, Milena Rego, Francisco Castro Moreira, Francisco Godefridus, M.J.Mohren |
author_role |
author |
author2 |
Holmgren, Milena Rego, Francisco Castro Moreira, Francisco Godefridus, M.J.Mohren |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Acácio, Vanda Holmgren, Milena Rego, Francisco Castro Moreira, Francisco Godefridus, M.J.Mohren |
dc.subject.por.fl_str_mv |
alternative stable states Cistus shrub encroachment vegetation shifts Quercus suber |
topic |
alternative stable states Cistus shrub encroachment vegetation shifts Quercus suber |
description |
In the Iberian Peninsula Mediterranean oak forests have been transformed into a mosaic landscape of four main patch-types: forests, savannas, shrublands and grasslands. We used aerial photographs over a period of 45 years (1958–2002) to quantify the persistence and rates of transitions between vegetation patch-types in southern Portugal, where cork oak is the dominant tree species. We used logistic regression to relate vegetation changes with topographical features and wildfire history. Over the 45 years, shrublands have been the most persistent patch-type (59%), and have been expanding; forests are also persistent (55%) but have been decreasing since 1985; savannas and grasslands were less persistent (33% and 15%, respectively). Shrublands persistence was significantly correlated with wildfire occurrence, particularly on southern exposures after 1995. In contrast, forest persistence decreased with wildfire occurrence, and forests were more likely to change into shrublands where wildfire had occurred after 1995. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008 2008-01-01T00:00:00Z 2013-05-29T13:10:26Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.5/5586 |
url |
http://hdl.handle.net/10400.5/5586 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Agroforestry Systems". ISSN 0167-4360. 76 (2009) 389-400 0167-4360 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799131006197825536 |