Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover
- Autores
- Torrella, Sebastián; Ginzburg, Rubén; Adamoli, Jorge Miguel; Galetto, Leonardo
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Subtropical Argentinean Chaco forests have been severely deforested and fragmented due to agriculture during the last six decades. The most affected forests are located in areas that are most favorable for crops. This is the case of the semi-deciduous "bosque de tres quebrachos" (three quebrachos forest) in southwest of Chaco Province (Argentina), where this study was carried out. The aim of this work was to analyze the fragmentation process, considering spatial (fragments and landscape levels) and temporal (land use changes) scales, studying the effects on the forest structure (density and basal area) and tree recruitment. All trees (adults and saplings) were recorded and measured in 112 plots (400 m2) distributed in 28 forest fragments (0.9-160 ha) located at four different landscape samples (4500 ha) in one environmentally homogeneous zone (72,804 ha). The four landscape samples have different current forest cover (low/high) and different land use history (low/high). Using linear mixed models, we evaluated the effects of current and historic fragment size, landscape forest cover and land use changes on the density and basal area at stand level, and considering the two different strata (upper and middle). Results showed that fragmentation did not severely affect the structure of the older age classes of trees in the remaining fragments but affect the tree recruitment, which could influence over the ability of the forest to perpetuate itself. We found positive relationships between sapling density and fragment size for the tree species of middle stratum, and between sapling density and forest cover at landscape level for the species of upper stratum. Regarding adults, we found a negative relationship between density and historic fragment size, probably related to the past timber harvesting. We concluded that even small fragments of three quebrachos forest and those located in highly deforested landscapes have high conservation value since their structure does not differ from that of the larger fragments or landscapes with higher forest cover. Our results reveal the importance of considering landscape and fragment scales simultaneously to better understand the fragmentation process and improve the recommendations for the management of fragmented landscapes.
Fil: Torrella, Sebastián. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina
Fil: Ginzburg, Rubén. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina
Fil: Adamoli, Jorge Miguel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina - Materia
-
Forest Fragmentation
Land Use Changes
Chaco Forest
Tree Recruitment - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/12655
Ver los metadatos del registro completo
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Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest coverTorrella, SebastiánGinzburg, RubénAdamoli, Jorge MiguelGaletto, LeonardoForest FragmentationLand Use ChangesChaco ForestTree Recruitmenthttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Subtropical Argentinean Chaco forests have been severely deforested and fragmented due to agriculture during the last six decades. The most affected forests are located in areas that are most favorable for crops. This is the case of the semi-deciduous "bosque de tres quebrachos" (three quebrachos forest) in southwest of Chaco Province (Argentina), where this study was carried out. The aim of this work was to analyze the fragmentation process, considering spatial (fragments and landscape levels) and temporal (land use changes) scales, studying the effects on the forest structure (density and basal area) and tree recruitment. All trees (adults and saplings) were recorded and measured in 112 plots (400 m2) distributed in 28 forest fragments (0.9-160 ha) located at four different landscape samples (4500 ha) in one environmentally homogeneous zone (72,804 ha). The four landscape samples have different current forest cover (low/high) and different land use history (low/high). Using linear mixed models, we evaluated the effects of current and historic fragment size, landscape forest cover and land use changes on the density and basal area at stand level, and considering the two different strata (upper and middle). Results showed that fragmentation did not severely affect the structure of the older age classes of trees in the remaining fragments but affect the tree recruitment, which could influence over the ability of the forest to perpetuate itself. We found positive relationships between sapling density and fragment size for the tree species of middle stratum, and between sapling density and forest cover at landscape level for the species of upper stratum. Regarding adults, we found a negative relationship between density and historic fragment size, probably related to the past timber harvesting. We concluded that even small fragments of three quebrachos forest and those located in highly deforested landscapes have high conservation value since their structure does not differ from that of the larger fragments or landscapes with higher forest cover. Our results reveal the importance of considering landscape and fragment scales simultaneously to better understand the fragmentation process and improve the recommendations for the management of fragmented landscapes.Fil: Torrella, Sebastián. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Ginzburg, Rubén. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Adamoli, Jorge Miguel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); ArgentinaElsevier Science2013-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12655Torrella, Sebastián; Ginzburg, Rubén; Adamoli, Jorge Miguel; Galetto, Leonardo; Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover; Elsevier Science; Forest Ecology And Management; 307; 5-2013; 147-1540378-1127enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.foreco.2013.07.016info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0378112713004490info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:47:36Zoai:ri.conicet.gov.ar:11336/12655instacron: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:34982025-09-29 10:47:36.413CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover |
title |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover |
spellingShingle |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover Torrella, Sebastián Forest Fragmentation Land Use Changes Chaco Forest Tree Recruitment |
title_short |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover |
title_full |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover |
title_fullStr |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover |
title_full_unstemmed |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover |
title_sort |
Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover |
dc.creator.none.fl_str_mv |
Torrella, Sebastián Ginzburg, Rubén Adamoli, Jorge Miguel Galetto, Leonardo |
author |
Torrella, Sebastián |
author_facet |
Torrella, Sebastián Ginzburg, Rubén Adamoli, Jorge Miguel Galetto, Leonardo |
author_role |
author |
author2 |
Ginzburg, Rubén Adamoli, Jorge Miguel Galetto, Leonardo |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Forest Fragmentation Land Use Changes Chaco Forest Tree Recruitment |
topic |
Forest Fragmentation Land Use Changes Chaco Forest Tree Recruitment |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Subtropical Argentinean Chaco forests have been severely deforested and fragmented due to agriculture during the last six decades. The most affected forests are located in areas that are most favorable for crops. This is the case of the semi-deciduous "bosque de tres quebrachos" (three quebrachos forest) in southwest of Chaco Province (Argentina), where this study was carried out. The aim of this work was to analyze the fragmentation process, considering spatial (fragments and landscape levels) and temporal (land use changes) scales, studying the effects on the forest structure (density and basal area) and tree recruitment. All trees (adults and saplings) were recorded and measured in 112 plots (400 m2) distributed in 28 forest fragments (0.9-160 ha) located at four different landscape samples (4500 ha) in one environmentally homogeneous zone (72,804 ha). The four landscape samples have different current forest cover (low/high) and different land use history (low/high). Using linear mixed models, we evaluated the effects of current and historic fragment size, landscape forest cover and land use changes on the density and basal area at stand level, and considering the two different strata (upper and middle). Results showed that fragmentation did not severely affect the structure of the older age classes of trees in the remaining fragments but affect the tree recruitment, which could influence over the ability of the forest to perpetuate itself. We found positive relationships between sapling density and fragment size for the tree species of middle stratum, and between sapling density and forest cover at landscape level for the species of upper stratum. Regarding adults, we found a negative relationship between density and historic fragment size, probably related to the past timber harvesting. We concluded that even small fragments of three quebrachos forest and those located in highly deforested landscapes have high conservation value since their structure does not differ from that of the larger fragments or landscapes with higher forest cover. Our results reveal the importance of considering landscape and fragment scales simultaneously to better understand the fragmentation process and improve the recommendations for the management of fragmented landscapes. Fil: Torrella, Sebastián. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina Fil: Ginzburg, Rubén. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina Fil: Adamoli, Jorge Miguel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina |
description |
Subtropical Argentinean Chaco forests have been severely deforested and fragmented due to agriculture during the last six decades. The most affected forests are located in areas that are most favorable for crops. This is the case of the semi-deciduous "bosque de tres quebrachos" (three quebrachos forest) in southwest of Chaco Province (Argentina), where this study was carried out. The aim of this work was to analyze the fragmentation process, considering spatial (fragments and landscape levels) and temporal (land use changes) scales, studying the effects on the forest structure (density and basal area) and tree recruitment. All trees (adults and saplings) were recorded and measured in 112 plots (400 m2) distributed in 28 forest fragments (0.9-160 ha) located at four different landscape samples (4500 ha) in one environmentally homogeneous zone (72,804 ha). The four landscape samples have different current forest cover (low/high) and different land use history (low/high). Using linear mixed models, we evaluated the effects of current and historic fragment size, landscape forest cover and land use changes on the density and basal area at stand level, and considering the two different strata (upper and middle). Results showed that fragmentation did not severely affect the structure of the older age classes of trees in the remaining fragments but affect the tree recruitment, which could influence over the ability of the forest to perpetuate itself. We found positive relationships between sapling density and fragment size for the tree species of middle stratum, and between sapling density and forest cover at landscape level for the species of upper stratum. Regarding adults, we found a negative relationship between density and historic fragment size, probably related to the past timber harvesting. We concluded that even small fragments of three quebrachos forest and those located in highly deforested landscapes have high conservation value since their structure does not differ from that of the larger fragments or landscapes with higher forest cover. Our results reveal the importance of considering landscape and fragment scales simultaneously to better understand the fragmentation process and improve the recommendations for the management of fragmented landscapes. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-05 |
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/11336/12655 Torrella, Sebastián; Ginzburg, Rubén; Adamoli, Jorge Miguel; Galetto, Leonardo; Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover; Elsevier Science; Forest Ecology And Management; 307; 5-2013; 147-154 0378-1127 |
url |
http://hdl.handle.net/11336/12655 |
identifier_str_mv |
Torrella, Sebastián; Ginzburg, Rubén; Adamoli, Jorge Miguel; Galetto, Leonardo; Changes in forest structure and tree recruitment in Argentinean Chaco: Effects of fragment size and landscape forest cover; Elsevier Science; Forest Ecology And Management; 307; 5-2013; 147-154 0378-1127 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.foreco.2013.07.016 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0378112713004490 |
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 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 |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |