Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/19567 |
Resumo: | Montado decline has been reported since the end of the nineteenth century in southern Portugal and increased markedly during the 1980s. Consensual reports in the literature suggest that this decline is due to a number of factors, such as environmental constraints, forest diseases, inappropriate management, and socioeconomic issues. An assessment on the pattern of montado distribution was conducted to reveal how the extent of land management, environmental variables, and spatial factors contributed to montado area loss in southern Portugal from 1990 to 2006. A total of 14 independent variables, presumably related to montado loss, were grouped into three sets: environmental variables, land management variables, and spatial variables. From 1990 to 2006, approximately 90,054 ha disappeared in the montado area, with an estimated annual regression rate of 0.14 % year-1. Variation partitioning showed that the land management model accounted for the highest percentage of explained variance (51.8 %), followed by spatial factors (44.6 %) and environmental factors (35.5 %). These results indicate that most variance in the large-scale distribution of recent montado loss is due to land management, either alone or in combination with environmental and spatial factors. The full GAM model showed that different livestock grazing is one of the most important variables affecting montado loss. This suggests that optimum carrying capacity should decrease to 0.18–0.60 LU ha-1 for livestock grazing in montado under current ecological conditions in southern Portugal. |
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Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern PortugalMontado decline has been reported since the end of the nineteenth century in southern Portugal and increased markedly during the 1980s. Consensual reports in the literature suggest that this decline is due to a number of factors, such as environmental constraints, forest diseases, inappropriate management, and socioeconomic issues. An assessment on the pattern of montado distribution was conducted to reveal how the extent of land management, environmental variables, and spatial factors contributed to montado area loss in southern Portugal from 1990 to 2006. A total of 14 independent variables, presumably related to montado loss, were grouped into three sets: environmental variables, land management variables, and spatial variables. From 1990 to 2006, approximately 90,054 ha disappeared in the montado area, with an estimated annual regression rate of 0.14 % year-1. Variation partitioning showed that the land management model accounted for the highest percentage of explained variance (51.8 %), followed by spatial factors (44.6 %) and environmental factors (35.5 %). These results indicate that most variance in the large-scale distribution of recent montado loss is due to land management, either alone or in combination with environmental and spatial factors. The full GAM model showed that different livestock grazing is one of the most important variables affecting montado loss. This suggests that optimum carrying capacity should decrease to 0.18–0.60 LU ha-1 for livestock grazing in montado under current ecological conditions in southern Portugal.2017-01-06T15:47:24Z2017-01-062016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/19567http://hdl.handle.net/10174/19567por0167-4366Godinho, Sérgio; Guiomar, Nuno; Machado, Rui; Santos, Pedro; Sá-Sousa, Paulo; Fernandes, J. P.; Neves, Nuno; Pinto-Correia, Teresa. Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal, Agroforestry Systems, 90, 1, 177-192, 2016.ndndndndndndndndGodinho, SérgioGuiomar, NunoMachado, RuiSantos, PedroSá-Sousa, PauloFernandes, J. P.Neves, NunoPinto-Correia, Teresainfo: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:RCAAP2024-01-03T19:08:57Zoai:dspace.uevora.pt:10174/19567Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:11:17.848194Repositório 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 |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal |
title |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal |
spellingShingle |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal Godinho, Sérgio |
title_short |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal |
title_full |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal |
title_fullStr |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal |
title_full_unstemmed |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal |
title_sort |
Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal |
author |
Godinho, Sérgio |
author_facet |
Godinho, Sérgio Guiomar, Nuno Machado, Rui Santos, Pedro Sá-Sousa, Paulo Fernandes, J. P. Neves, Nuno Pinto-Correia, Teresa |
author_role |
author |
author2 |
Guiomar, Nuno Machado, Rui Santos, Pedro Sá-Sousa, Paulo Fernandes, J. P. Neves, Nuno Pinto-Correia, Teresa |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Godinho, Sérgio Guiomar, Nuno Machado, Rui Santos, Pedro Sá-Sousa, Paulo Fernandes, J. P. Neves, Nuno Pinto-Correia, Teresa |
description |
Montado decline has been reported since the end of the nineteenth century in southern Portugal and increased markedly during the 1980s. Consensual reports in the literature suggest that this decline is due to a number of factors, such as environmental constraints, forest diseases, inappropriate management, and socioeconomic issues. An assessment on the pattern of montado distribution was conducted to reveal how the extent of land management, environmental variables, and spatial factors contributed to montado area loss in southern Portugal from 1990 to 2006. A total of 14 independent variables, presumably related to montado loss, were grouped into three sets: environmental variables, land management variables, and spatial variables. From 1990 to 2006, approximately 90,054 ha disappeared in the montado area, with an estimated annual regression rate of 0.14 % year-1. Variation partitioning showed that the land management model accounted for the highest percentage of explained variance (51.8 %), followed by spatial factors (44.6 %) and environmental factors (35.5 %). These results indicate that most variance in the large-scale distribution of recent montado loss is due to land management, either alone or in combination with environmental and spatial factors. The full GAM model showed that different livestock grazing is one of the most important variables affecting montado loss. This suggests that optimum carrying capacity should decrease to 0.18–0.60 LU ha-1 for livestock grazing in montado under current ecological conditions in southern Portugal. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01T00:00:00Z 2017-01-06T15:47:24Z 2017-01-06 |
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/10174/19567 http://hdl.handle.net/10174/19567 |
url |
http://hdl.handle.net/10174/19567 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
0167-4366 Godinho, Sérgio; Guiomar, Nuno; Machado, Rui; Santos, Pedro; Sá-Sousa, Paulo; Fernandes, J. P.; Neves, Nuno; Pinto-Correia, Teresa. Assessment of environment, land management, and spatial variables on recent changes in montado land cover in southern Portugal, Agroforestry Systems, 90, 1, 177-192, 2016. nd nd nd nd nd nd nd nd |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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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1799136595318669312 |