Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)

Autores
Pazos, Gustavo Enrique; Ares, Jorge Oscar; Bertiller, Monica Beatriz
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Grazing alters the spatial structure of shrubs and perennial grasses in desert shrub communities. The resulting spatial distribution of shrub-grass patches constitutes a sensitive indicator of the integrated result of grazing impacts on them. While several procedures were developed to estimate the size of shrub clumps, metrics of the geometry of the interacting grass matrix received less attention. In this study, we conceptualised the spatial structure of shrub-grass patches as consisting of two components: a grass crown of ill-defined outer borders (the 'grass component') encircling a shrub clump (the 'shrub component'). We fitted exponential functions to autocorrelograms of spatially explicit shrub-grass cover data surveyed at different locations of the Patagonian Monte (Argentina) differing in livestock grazing pressure. After that, we derived two metrics from the function parameters that quantitatively estimate the size of both the shrub and the grass components of shrub-grass patches. The patterns of variation of these metrics are consistent with field measurements and observations previously reported for the studied areas, indicating that they are sensitive indicators of the state of development of the shrub-grass mosaic under different grazing pressures. These results suggest that its applicability to similar semi-arid shrublands deserves further attention.
Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Ares, Jorge Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Materia
AUTOCORRELATION
GRAZING
INDICATORS
SPATIAL PATTERN
TWO-PHASE MOSAIC
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:11336/94199
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/94199
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)Pazos, Gustavo EnriqueAres, Jorge OscarBertiller, Monica BeatrizAUTOCORRELATIONGRAZINGINDICATORSSPATIAL PATTERNTWO-PHASE MOSAIChttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Grazing alters the spatial structure of shrubs and perennial grasses in desert shrub communities. The resulting spatial distribution of shrub-grass patches constitutes a sensitive indicator of the integrated result of grazing impacts on them. While several procedures were developed to estimate the size of shrub clumps, metrics of the geometry of the interacting grass matrix received less attention. In this study, we conceptualised the spatial structure of shrub-grass patches as consisting of two components: a grass crown of ill-defined outer borders (the 'grass component') encircling a shrub clump (the 'shrub component'). We fitted exponential functions to autocorrelograms of spatially explicit shrub-grass cover data surveyed at different locations of the Patagonian Monte (Argentina) differing in livestock grazing pressure. After that, we derived two metrics from the function parameters that quantitatively estimate the size of both the shrub and the grass components of shrub-grass patches. The patterns of variation of these metrics are consistent with field measurements and observations previously reported for the studied areas, indicating that they are sensitive indicators of the state of development of the shrub-grass mosaic under different grazing pressures. These results suggest that its applicability to similar semi-arid shrublands deserves further attention.Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Ares, Jorge Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaAcademic Press Ltd - Elsevier Science Ltd2010-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94199Pazos, Gustavo Enrique; Ares, Jorge Oscar; Bertiller, Monica Beatriz; Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina); Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 74; 8; 8-2010; 998-10020140-1963CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2009.12.004info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0140196310000042info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:23:52Zoai:ri.conicet.gov.ar:11336/94199instacron: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 10:23:52.962CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
title Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
spellingShingle Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
Pazos, Gustavo Enrique
AUTOCORRELATION
GRAZING
INDICATORS
SPATIAL PATTERN
TWO-PHASE MOSAIC
title_short Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
title_full Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
title_fullStr Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
title_full_unstemmed Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
title_sort Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina)
dc.creator.none.fl_str_mv Pazos, Gustavo Enrique
Ares, Jorge Oscar
Bertiller, Monica Beatriz
author Pazos, Gustavo Enrique
author_facet Pazos, Gustavo Enrique
Ares, Jorge Oscar
Bertiller, Monica Beatriz
author_role author
author2 Ares, Jorge Oscar
Bertiller, Monica Beatriz
author2_role author
author
dc.subject.none.fl_str_mv AUTOCORRELATION
GRAZING
INDICATORS
SPATIAL PATTERN
TWO-PHASE MOSAIC
topic AUTOCORRELATION
GRAZING
INDICATORS
SPATIAL PATTERN
TWO-PHASE MOSAIC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Grazing alters the spatial structure of shrubs and perennial grasses in desert shrub communities. The resulting spatial distribution of shrub-grass patches constitutes a sensitive indicator of the integrated result of grazing impacts on them. While several procedures were developed to estimate the size of shrub clumps, metrics of the geometry of the interacting grass matrix received less attention. In this study, we conceptualised the spatial structure of shrub-grass patches as consisting of two components: a grass crown of ill-defined outer borders (the 'grass component') encircling a shrub clump (the 'shrub component'). We fitted exponential functions to autocorrelograms of spatially explicit shrub-grass cover data surveyed at different locations of the Patagonian Monte (Argentina) differing in livestock grazing pressure. After that, we derived two metrics from the function parameters that quantitatively estimate the size of both the shrub and the grass components of shrub-grass patches. The patterns of variation of these metrics are consistent with field measurements and observations previously reported for the studied areas, indicating that they are sensitive indicators of the state of development of the shrub-grass mosaic under different grazing pressures. These results suggest that its applicability to similar semi-arid shrublands deserves further attention.
Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Ares, Jorge Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
description Grazing alters the spatial structure of shrubs and perennial grasses in desert shrub communities. The resulting spatial distribution of shrub-grass patches constitutes a sensitive indicator of the integrated result of grazing impacts on them. While several procedures were developed to estimate the size of shrub clumps, metrics of the geometry of the interacting grass matrix received less attention. In this study, we conceptualised the spatial structure of shrub-grass patches as consisting of two components: a grass crown of ill-defined outer borders (the 'grass component') encircling a shrub clump (the 'shrub component'). We fitted exponential functions to autocorrelograms of spatially explicit shrub-grass cover data surveyed at different locations of the Patagonian Monte (Argentina) differing in livestock grazing pressure. After that, we derived two metrics from the function parameters that quantitatively estimate the size of both the shrub and the grass components of shrub-grass patches. The patterns of variation of these metrics are consistent with field measurements and observations previously reported for the studied areas, indicating that they are sensitive indicators of the state of development of the shrub-grass mosaic under different grazing pressures. These results suggest that its applicability to similar semi-arid shrublands deserves further attention.
publishDate 2010
dc.date.none.fl_str_mv 2010-08
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/11336/94199
Pazos, Gustavo Enrique; Ares, Jorge Oscar; Bertiller, Monica Beatriz; Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina); Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 74; 8; 8-2010; 998-1002
0140-1963
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94199
identifier_str_mv Pazos, Gustavo Enrique; Ares, Jorge Oscar; Bertiller, Monica Beatriz; Quantitative assessment of shrub-grass mosaic development in grazed shrublands: An example in the Patagonian Monte (Argentina); Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 74; 8; 8-2010; 998-1002
0140-1963
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.jaridenv.2009.12.004
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0140196310000042
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 Academic Press Ltd - Elsevier Science Ltd
publisher.none.fl_str_mv Academic Press Ltd - Elsevier Science Ltd
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 13.070432

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