Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte
- Autores
- Pazos, Gustavo Enrique; Bisigato, Alejandro Jorge; Bertiller, Monica Beatriz
- Año de publicación
- 2007
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We analysed the density, bunch size, and spatial patterning in relation to the shrubby matrix of the three dominant perennial grasses of the Patagonian Monte with different functional traits related to resource acquisition/conservation, mesophytism/xerophytism, and reproductive strategy. Field sampling was carried out at grazed (low and high grazing pressure) and excluded from grazing (15 years) sites. Grazing disturbance did not change the cover of the shrubby matrix but modified its spatial structure leading to increased density and reduced diameter of shrub patches. Changes in the abundance of perennial grass species among sites may be primarily attributed to a high direct effect of grazing on the species with the most mesophytic and acquisitive traits (N-rich green tissues, high leaf production, and low lignin concentration in leaves). Under grazing exclusion, this species was the most associated with shrub patches. The other perennial grass species either did not reduce or increased their abundance with grazing. The species with a mix of mesophytic and xerophytic traits was found with high frequency at inter-patch microsites. The most xerophytic and conservative species occupied vacant microsites either between shrub patches or at shrub-patch centres. However, the three species were increasingly concentrated under shrub canopies with increasing grazing pressure. This fact stresses the importance of shrub patches as biotic refuges for perennial grasses with low anti-herbivore defences.
Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Bisigato, Alejandro Jorge. 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
-
STRESS TOLERANCE
SHRUB PATCHES
ARID ECOSYSTEMS
FUNCTIONAL TRAITS
GRAZING REFUGES
PLANT DEFENCES
PREFERENCE BY HERBIVORES - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/102790
Ver los metadatos del registro completo
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Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian MontePazos, Gustavo EnriqueBisigato, Alejandro JorgeBertiller, Monica BeatrizSTRESS TOLERANCESHRUB PATCHESARID ECOSYSTEMSFUNCTIONAL TRAITSGRAZING REFUGESPLANT DEFENCESPREFERENCE BY HERBIVOREShttps://purl.org/becyt/ford/4.5https://purl.org/becyt/ford/4We analysed the density, bunch size, and spatial patterning in relation to the shrubby matrix of the three dominant perennial grasses of the Patagonian Monte with different functional traits related to resource acquisition/conservation, mesophytism/xerophytism, and reproductive strategy. Field sampling was carried out at grazed (low and high grazing pressure) and excluded from grazing (15 years) sites. Grazing disturbance did not change the cover of the shrubby matrix but modified its spatial structure leading to increased density and reduced diameter of shrub patches. Changes in the abundance of perennial grass species among sites may be primarily attributed to a high direct effect of grazing on the species with the most mesophytic and acquisitive traits (N-rich green tissues, high leaf production, and low lignin concentration in leaves). Under grazing exclusion, this species was the most associated with shrub patches. The other perennial grass species either did not reduce or increased their abundance with grazing. The species with a mix of mesophytic and xerophytic traits was found with high frequency at inter-patch microsites. The most xerophytic and conservative species occupied vacant microsites either between shrub patches or at shrub-patch centres. However, the three species were increasingly concentrated under shrub canopies with increasing grazing pressure. This fact stresses the importance of shrub patches as biotic refuges for perennial grasses with low anti-herbivore defences.Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Bisigato, Alejandro Jorge. 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 Ltd2007-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/102790Pazos, Gustavo Enrique; Bisigato, Alejandro Jorge; Bertiller, Monica Beatriz; Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 70; 2; 7-2007; 316-3280140-1963CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2006.12.025info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0140196307000237info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:31:45Zoai:ri.conicet.gov.ar:11336/102790instacron: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 10:31:45.728CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte |
title |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte |
spellingShingle |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte Pazos, Gustavo Enrique STRESS TOLERANCE SHRUB PATCHES ARID ECOSYSTEMS FUNCTIONAL TRAITS GRAZING REFUGES PLANT DEFENCES PREFERENCE BY HERBIVORES |
title_short |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte |
title_full |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte |
title_fullStr |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte |
title_full_unstemmed |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte |
title_sort |
Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte |
dc.creator.none.fl_str_mv |
Pazos, Gustavo Enrique Bisigato, Alejandro Jorge Bertiller, Monica Beatriz |
author |
Pazos, Gustavo Enrique |
author_facet |
Pazos, Gustavo Enrique Bisigato, Alejandro Jorge Bertiller, Monica Beatriz |
author_role |
author |
author2 |
Bisigato, Alejandro Jorge Bertiller, Monica Beatriz |
author2_role |
author author |
dc.subject.none.fl_str_mv |
STRESS TOLERANCE SHRUB PATCHES ARID ECOSYSTEMS FUNCTIONAL TRAITS GRAZING REFUGES PLANT DEFENCES PREFERENCE BY HERBIVORES |
topic |
STRESS TOLERANCE SHRUB PATCHES ARID ECOSYSTEMS FUNCTIONAL TRAITS GRAZING REFUGES PLANT DEFENCES PREFERENCE BY HERBIVORES |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/4.5 https://purl.org/becyt/ford/4 |
dc.description.none.fl_txt_mv |
We analysed the density, bunch size, and spatial patterning in relation to the shrubby matrix of the three dominant perennial grasses of the Patagonian Monte with different functional traits related to resource acquisition/conservation, mesophytism/xerophytism, and reproductive strategy. Field sampling was carried out at grazed (low and high grazing pressure) and excluded from grazing (15 years) sites. Grazing disturbance did not change the cover of the shrubby matrix but modified its spatial structure leading to increased density and reduced diameter of shrub patches. Changes in the abundance of perennial grass species among sites may be primarily attributed to a high direct effect of grazing on the species with the most mesophytic and acquisitive traits (N-rich green tissues, high leaf production, and low lignin concentration in leaves). Under grazing exclusion, this species was the most associated with shrub patches. The other perennial grass species either did not reduce or increased their abundance with grazing. The species with a mix of mesophytic and xerophytic traits was found with high frequency at inter-patch microsites. The most xerophytic and conservative species occupied vacant microsites either between shrub patches or at shrub-patch centres. However, the three species were increasingly concentrated under shrub canopies with increasing grazing pressure. This fact stresses the importance of shrub patches as biotic refuges for perennial grasses with low anti-herbivore defences. Fil: Pazos, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Bisigato, Alejandro Jorge. 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 |
We analysed the density, bunch size, and spatial patterning in relation to the shrubby matrix of the three dominant perennial grasses of the Patagonian Monte with different functional traits related to resource acquisition/conservation, mesophytism/xerophytism, and reproductive strategy. Field sampling was carried out at grazed (low and high grazing pressure) and excluded from grazing (15 years) sites. Grazing disturbance did not change the cover of the shrubby matrix but modified its spatial structure leading to increased density and reduced diameter of shrub patches. Changes in the abundance of perennial grass species among sites may be primarily attributed to a high direct effect of grazing on the species with the most mesophytic and acquisitive traits (N-rich green tissues, high leaf production, and low lignin concentration in leaves). Under grazing exclusion, this species was the most associated with shrub patches. The other perennial grass species either did not reduce or increased their abundance with grazing. The species with a mix of mesophytic and xerophytic traits was found with high frequency at inter-patch microsites. The most xerophytic and conservative species occupied vacant microsites either between shrub patches or at shrub-patch centres. However, the three species were increasingly concentrated under shrub canopies with increasing grazing pressure. This fact stresses the importance of shrub patches as biotic refuges for perennial grasses with low anti-herbivore defences. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-07 |
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/11336/102790 Pazos, Gustavo Enrique; Bisigato, Alejandro Jorge; Bertiller, Monica Beatriz; Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 70; 2; 7-2007; 316-328 0140-1963 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/102790 |
identifier_str_mv |
Pazos, Gustavo Enrique; Bisigato, Alejandro Jorge; Bertiller, Monica Beatriz; Abundance and spatial patterning of coexisting perennial grasses in grazed shrublands of the Patagonian Monte; Academic Press Ltd - Elsevier Science Ltd; Journal of Arid Environments; 70; 2; 7-2007; 316-328 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.2006.12.025 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0140196307000237 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf 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 |
_version_ |
1844614328798412800 |
score |
13.070432 |