Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America

Autores
Miranda, Alejandro; Lara, Antonio; Altamirano, Adison; Di Bella, Carlos Marcelo; González, Mauro Eduardo Javier; Julio Camarero, Jesus
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Deforestation is widely studied throughout the world. However, a less evident issue is the effect of climate change and drought on remnants of native forests. The objective of this work was to understand the geographic variations in resistance to drought of the Mediterranean sclerophyllous forests of central Chile. These forests have been historically reduced and fragmented and in recent years were subjected to the most prolonged drought occurred between 2010 and 2017. Using data from the MODIS satellite sensor, temporal trends in the NDVI (Normalized Difference Vegetation Index) were quantified. We related these trends with different environmental variables to understand the effects of geographical variation and forest type as indicators of resistance to drought. We observed a significant direct effect of drought, attributable to the reduced precipitation in central Chile, and a significantly reduced NDVI in near one-third of the region forests (browning). However, NDVI and therefore forest productivity were more stable in some mesic sites such as ravine bottoms, but not on south-facing slopes. This suggests that under a regime of reduced precipitations, a greater available soil humidity would be a more important factor than the fact of receiving less solar radiation. Finally, the highest degree of browning was observed in semi-arid sclerophyllous forest dominated by species tolerant to drought. Our findings emphasize the need to consider topographic site conditions to adequately assess forest productivity and vulnerability where local wet conditions could provide drought refuges. This recent drought may be analogous to forecasted warmer and drier climate conditions with more frequent and severe droughts, so our results may serve as a general framework for climate-smart decisions in highly threatened forest restoration and conservation.
Fil: Miranda, Alejandro. Universidad de La Frontera; Chile. Universidad de Chile; Chile. Universidad Austral de Chile; Chile
Fil: Lara, Antonio. Universidad Austral de Chile; Chile. Universidad de Chile; Chile
Fil: Altamirano, Adison. Universidad de La Frontera; Chile
Fil: Di Bella, Carlos Marcelo. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales. Instituto de Clima y Agua; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina
Fil: González, Mauro Eduardo Javier. Universidad de Chile; Chile. Universidad Austral de Chile; Chile
Fil: Julio Camarero, Jesus. Instituto Pirenaico de Ecología; España
Materia
CHILE
CLIMATE CHANGE
NDVI
REMOTE SENSING
RESILIENCE
RESISTANCE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/132504
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/132504
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Forest browning trends in response to drought in a highly threatened mediterranean landscape of South AmericaMiranda, AlejandroLara, AntonioAltamirano, AdisonDi Bella, Carlos MarceloGonzález, Mauro Eduardo JavierJulio Camarero, JesusCHILECLIMATE CHANGENDVIREMOTE SENSINGRESILIENCERESISTANCEhttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Deforestation is widely studied throughout the world. However, a less evident issue is the effect of climate change and drought on remnants of native forests. The objective of this work was to understand the geographic variations in resistance to drought of the Mediterranean sclerophyllous forests of central Chile. These forests have been historically reduced and fragmented and in recent years were subjected to the most prolonged drought occurred between 2010 and 2017. Using data from the MODIS satellite sensor, temporal trends in the NDVI (Normalized Difference Vegetation Index) were quantified. We related these trends with different environmental variables to understand the effects of geographical variation and forest type as indicators of resistance to drought. We observed a significant direct effect of drought, attributable to the reduced precipitation in central Chile, and a significantly reduced NDVI in near one-third of the region forests (browning). However, NDVI and therefore forest productivity were more stable in some mesic sites such as ravine bottoms, but not on south-facing slopes. This suggests that under a regime of reduced precipitations, a greater available soil humidity would be a more important factor than the fact of receiving less solar radiation. Finally, the highest degree of browning was observed in semi-arid sclerophyllous forest dominated by species tolerant to drought. Our findings emphasize the need to consider topographic site conditions to adequately assess forest productivity and vulnerability where local wet conditions could provide drought refuges. This recent drought may be analogous to forecasted warmer and drier climate conditions with more frequent and severe droughts, so our results may serve as a general framework for climate-smart decisions in highly threatened forest restoration and conservation.Fil: Miranda, Alejandro. Universidad de La Frontera; Chile. Universidad de Chile; Chile. Universidad Austral de Chile; ChileFil: Lara, Antonio. Universidad Austral de Chile; Chile. Universidad de Chile; ChileFil: Altamirano, Adison. Universidad de La Frontera; ChileFil: Di Bella, Carlos Marcelo. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales. Instituto de Clima y Agua; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; ArgentinaFil: González, Mauro Eduardo Javier. Universidad de Chile; Chile. Universidad Austral de Chile; ChileFil: Julio Camarero, Jesus. Instituto Pirenaico de Ecología; EspañaElsevier Science2020-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/132504Miranda, Alejandro; Lara, Antonio; Altamirano, Adison; Di Bella, Carlos Marcelo; González, Mauro Eduardo Javier; et al.; Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America; Elsevier Science; Ecological Indicators; 115; 8-2020; 1-101470-160XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecolind.2020.106401info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1470160X20303381info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:28:45Zoai:ri.conicet.gov.ar:11336/132504instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:28:46.254CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
title Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
spellingShingle Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
Miranda, Alejandro
CHILE
CLIMATE CHANGE
NDVI
REMOTE SENSING
RESILIENCE
RESISTANCE
title_short Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
title_full Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
title_fullStr Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
title_full_unstemmed Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
title_sort Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America
dc.creator.none.fl_str_mv Miranda, Alejandro
Lara, Antonio
Altamirano, Adison
Di Bella, Carlos Marcelo
González, Mauro Eduardo Javier
Julio Camarero, Jesus
author Miranda, Alejandro
author_facet Miranda, Alejandro
Lara, Antonio
Altamirano, Adison
Di Bella, Carlos Marcelo
González, Mauro Eduardo Javier
Julio Camarero, Jesus
author_role author
author2 Lara, Antonio
Altamirano, Adison
Di Bella, Carlos Marcelo
González, Mauro Eduardo Javier
Julio Camarero, Jesus
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CHILE
CLIMATE CHANGE
NDVI
REMOTE SENSING
RESILIENCE
RESISTANCE
topic CHILE
CLIMATE CHANGE
NDVI
REMOTE SENSING
RESILIENCE
RESISTANCE
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Deforestation is widely studied throughout the world. However, a less evident issue is the effect of climate change and drought on remnants of native forests. The objective of this work was to understand the geographic variations in resistance to drought of the Mediterranean sclerophyllous forests of central Chile. These forests have been historically reduced and fragmented and in recent years were subjected to the most prolonged drought occurred between 2010 and 2017. Using data from the MODIS satellite sensor, temporal trends in the NDVI (Normalized Difference Vegetation Index) were quantified. We related these trends with different environmental variables to understand the effects of geographical variation and forest type as indicators of resistance to drought. We observed a significant direct effect of drought, attributable to the reduced precipitation in central Chile, and a significantly reduced NDVI in near one-third of the region forests (browning). However, NDVI and therefore forest productivity were more stable in some mesic sites such as ravine bottoms, but not on south-facing slopes. This suggests that under a regime of reduced precipitations, a greater available soil humidity would be a more important factor than the fact of receiving less solar radiation. Finally, the highest degree of browning was observed in semi-arid sclerophyllous forest dominated by species tolerant to drought. Our findings emphasize the need to consider topographic site conditions to adequately assess forest productivity and vulnerability where local wet conditions could provide drought refuges. This recent drought may be analogous to forecasted warmer and drier climate conditions with more frequent and severe droughts, so our results may serve as a general framework for climate-smart decisions in highly threatened forest restoration and conservation.
Fil: Miranda, Alejandro. Universidad de La Frontera; Chile. Universidad de Chile; Chile. Universidad Austral de Chile; Chile
Fil: Lara, Antonio. Universidad Austral de Chile; Chile. Universidad de Chile; Chile
Fil: Altamirano, Adison. Universidad de La Frontera; Chile
Fil: Di Bella, Carlos Marcelo. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales. Instituto de Clima y Agua; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; Argentina
Fil: González, Mauro Eduardo Javier. Universidad de Chile; Chile. Universidad Austral de Chile; Chile
Fil: Julio Camarero, Jesus. Instituto Pirenaico de Ecología; España
description Deforestation is widely studied throughout the world. However, a less evident issue is the effect of climate change and drought on remnants of native forests. The objective of this work was to understand the geographic variations in resistance to drought of the Mediterranean sclerophyllous forests of central Chile. These forests have been historically reduced and fragmented and in recent years were subjected to the most prolonged drought occurred between 2010 and 2017. Using data from the MODIS satellite sensor, temporal trends in the NDVI (Normalized Difference Vegetation Index) were quantified. We related these trends with different environmental variables to understand the effects of geographical variation and forest type as indicators of resistance to drought. We observed a significant direct effect of drought, attributable to the reduced precipitation in central Chile, and a significantly reduced NDVI in near one-third of the region forests (browning). However, NDVI and therefore forest productivity were more stable in some mesic sites such as ravine bottoms, but not on south-facing slopes. This suggests that under a regime of reduced precipitations, a greater available soil humidity would be a more important factor than the fact of receiving less solar radiation. Finally, the highest degree of browning was observed in semi-arid sclerophyllous forest dominated by species tolerant to drought. Our findings emphasize the need to consider topographic site conditions to adequately assess forest productivity and vulnerability where local wet conditions could provide drought refuges. This recent drought may be analogous to forecasted warmer and drier climate conditions with more frequent and severe droughts, so our results may serve as a general framework for climate-smart decisions in highly threatened forest restoration and conservation.
publishDate 2020
dc.date.none.fl_str_mv 2020-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/132504
Miranda, Alejandro; Lara, Antonio; Altamirano, Adison; Di Bella, Carlos Marcelo; González, Mauro Eduardo Javier; et al.; Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America; Elsevier Science; Ecological Indicators; 115; 8-2020; 1-10
1470-160X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/132504
identifier_str_mv Miranda, Alejandro; Lara, Antonio; Altamirano, Adison; Di Bella, Carlos Marcelo; González, Mauro Eduardo Javier; et al.; Forest browning trends in response to drought in a highly threatened mediterranean landscape of South America; Elsevier Science; Ecological Indicators; 115; 8-2020; 1-10
1470-160X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecolind.2020.106401
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1470160X20303381
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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