Variation of grazing-induced vegetation changes across a large-scale productivity gradient

Autores
Lezama, Felipe; Baeza, Santiago; Altesor, Alice; Cesa, Ariela; Chaneton, Enrique Jose; Paruelo, José
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Questions: Does the magnitude of grazing-induced changes in species composition vary with habitat productivity? How does the sign and magnitude of grazing effects on species richness and beta-diversity change with increasing productivity? Do major life forms exhibit consistent responses to grazing along productivity gradients? Location: Steppes and grasslands of southern South America in Argentina and Uruguay. Methods: We evaluated grazing effects on plant composition, species richness, beta-diversity and life-form abundances along a ten-fold, regional productivity gradient and within subregions of contrasting productivity, using a common sampling protocol for 23 paired grazed vs ungrazed plots. The annual integral of the normalized difference vegetation index was used as a surrogate for above-ground net primary productivity. Results: Compositional dissimilarity between grazed and ungrazed plots, as well as grazing-induced differences in plant richness and beta-diversity all increased with habitat productivity. Grazing decreased species richness in low-productive steppes but enhanced the richness of high-productive grasslands. On average, grazing reduced beta-diversity in high-productive sites but not in low-productive sites. Dominant species were more strongly suppressed by grazing towards productive grasslands. Grazing generally decreased shrub species cover, whereas graminoid and forb cover did not consistently change with grazing through the productivity gradient. Conclusions: Our results indicate that the overall grazing effects on vegetation structure increased along a regional productivity gradient. Yet the sign of grazing impacts on species richness and beta-diversity shifted with habitat productivity, in agreement with models of herbivore-mediated co-existence and species colonization in productive systems. Further, we found that narrowing the spatial extent of analysis to the subregion generally obscured grazing–productivity relationships. Biodiversity conservation programmes should carefully weigh the varied impacts of livestock grazing across productivity gradients
Fil: Lezama, Felipe. Universidad de la República. Facultad de Agronom ía. Unidad de Sistemas Ambientales; Uruguay
Fil: Baeza, Santiago. Universidad de la República. Facultad de Agronom ía. Unidad de Sistemas Ambientales; Uruguay
Fil: Altesor, Alice. Universidad de la República. Facultad de Ciencias. Instituto de Ecolog ía y Ciencias Ambientales; Uruguay
Fil: Cesa, Ariela. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Chaneton, Enrique Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomia; Argentina
Fil: Paruelo, José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; Argentina
Materia
Beta-Diversity
Dissimilarity
Life Forms
Normalized Difference Vegetation Index
Patagonian Steppes
Productivity
Río de La Plata Grasslands
Species Richness
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/4211
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/4211
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Variation of grazing-induced vegetation changes across a large-scale productivity gradientLezama, FelipeBaeza, SantiagoAltesor, AliceCesa, ArielaChaneton, Enrique JoseParuelo, JoséBeta-DiversityDissimilarityLife FormsNormalized Difference Vegetation IndexPatagonian SteppesProductivityRío de La Plata GrasslandsSpecies Richnesshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Questions: Does the magnitude of grazing-induced changes in species composition vary with habitat productivity? How does the sign and magnitude of grazing effects on species richness and beta-diversity change with increasing productivity? Do major life forms exhibit consistent responses to grazing along productivity gradients? Location: Steppes and grasslands of southern South America in Argentina and Uruguay. Methods: We evaluated grazing effects on plant composition, species richness, beta-diversity and life-form abundances along a ten-fold, regional productivity gradient and within subregions of contrasting productivity, using a common sampling protocol for 23 paired grazed vs ungrazed plots. The annual integral of the normalized difference vegetation index was used as a surrogate for above-ground net primary productivity. Results: Compositional dissimilarity between grazed and ungrazed plots, as well as grazing-induced differences in plant richness and beta-diversity all increased with habitat productivity. Grazing decreased species richness in low-productive steppes but enhanced the richness of high-productive grasslands. On average, grazing reduced beta-diversity in high-productive sites but not in low-productive sites. Dominant species were more strongly suppressed by grazing towards productive grasslands. Grazing generally decreased shrub species cover, whereas graminoid and forb cover did not consistently change with grazing through the productivity gradient. Conclusions: Our results indicate that the overall grazing effects on vegetation structure increased along a regional productivity gradient. Yet the sign of grazing impacts on species richness and beta-diversity shifted with habitat productivity, in agreement with models of herbivore-mediated co-existence and species colonization in productive systems. Further, we found that narrowing the spatial extent of analysis to the subregion generally obscured grazing–productivity relationships. Biodiversity conservation programmes should carefully weigh the varied impacts of livestock grazing across productivity gradientsFil: Lezama, Felipe. Universidad de la República. Facultad de Agronom ía. Unidad de Sistemas Ambientales; UruguayFil: Baeza, Santiago. Universidad de la República. Facultad de Agronom ía. Unidad de Sistemas Ambientales; UruguayFil: Altesor, Alice. Universidad de la República. Facultad de Ciencias. Instituto de Ecolog ía y Ciencias Ambientales; UruguayFil: Cesa, Ariela. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Chaneton, Enrique Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomia; ArgentinaFil: Paruelo, José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; ArgentinaWiley2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4211Lezama, Felipe; Baeza, Santiago; Altesor, Alice; Cesa, Ariela; Chaneton, Enrique Jose; et al.; Variation of grazing-induced vegetation changes across a large-scale productivity gradient; Wiley; Journal of Vegetation Science; 25; 1-2014; 8-211100-9233enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/jvs.12053/abstractinfo:eu-repo/semantics/altIdentifier/doi/DOI:10.1111/jvs.12053info:eu-repo/semantics/altIdentifier/issn/1100-9233info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:44:49Zoai:ri.conicet.gov.ar:11336/4211instacron: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:34982025-10-15 14:44:49.689CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Variation of grazing-induced vegetation changes across a large-scale productivity gradient
title Variation of grazing-induced vegetation changes across a large-scale productivity gradient
spellingShingle Variation of grazing-induced vegetation changes across a large-scale productivity gradient
Lezama, Felipe
Beta-Diversity
Dissimilarity
Life Forms
Normalized Difference Vegetation Index
Patagonian Steppes
Productivity
Río de La Plata Grasslands
Species Richness
title_short Variation of grazing-induced vegetation changes across a large-scale productivity gradient
title_full Variation of grazing-induced vegetation changes across a large-scale productivity gradient
title_fullStr Variation of grazing-induced vegetation changes across a large-scale productivity gradient
title_full_unstemmed Variation of grazing-induced vegetation changes across a large-scale productivity gradient
title_sort Variation of grazing-induced vegetation changes across a large-scale productivity gradient
dc.creator.none.fl_str_mv Lezama, Felipe
Baeza, Santiago
Altesor, Alice
Cesa, Ariela
Chaneton, Enrique Jose
Paruelo, José
author Lezama, Felipe
author_facet Lezama, Felipe
Baeza, Santiago
Altesor, Alice
Cesa, Ariela
Chaneton, Enrique Jose
Paruelo, José
author_role author
author2 Baeza, Santiago
Altesor, Alice
Cesa, Ariela
Chaneton, Enrique Jose
Paruelo, José
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Beta-Diversity
Dissimilarity
Life Forms
Normalized Difference Vegetation Index
Patagonian Steppes
Productivity
Río de La Plata Grasslands
Species Richness
topic Beta-Diversity
Dissimilarity
Life Forms
Normalized Difference Vegetation Index
Patagonian Steppes
Productivity
Río de La Plata Grasslands
Species Richness
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Questions: Does the magnitude of grazing-induced changes in species composition vary with habitat productivity? How does the sign and magnitude of grazing effects on species richness and beta-diversity change with increasing productivity? Do major life forms exhibit consistent responses to grazing along productivity gradients? Location: Steppes and grasslands of southern South America in Argentina and Uruguay. Methods: We evaluated grazing effects on plant composition, species richness, beta-diversity and life-form abundances along a ten-fold, regional productivity gradient and within subregions of contrasting productivity, using a common sampling protocol for 23 paired grazed vs ungrazed plots. The annual integral of the normalized difference vegetation index was used as a surrogate for above-ground net primary productivity. Results: Compositional dissimilarity between grazed and ungrazed plots, as well as grazing-induced differences in plant richness and beta-diversity all increased with habitat productivity. Grazing decreased species richness in low-productive steppes but enhanced the richness of high-productive grasslands. On average, grazing reduced beta-diversity in high-productive sites but not in low-productive sites. Dominant species were more strongly suppressed by grazing towards productive grasslands. Grazing generally decreased shrub species cover, whereas graminoid and forb cover did not consistently change with grazing through the productivity gradient. Conclusions: Our results indicate that the overall grazing effects on vegetation structure increased along a regional productivity gradient. Yet the sign of grazing impacts on species richness and beta-diversity shifted with habitat productivity, in agreement with models of herbivore-mediated co-existence and species colonization in productive systems. Further, we found that narrowing the spatial extent of analysis to the subregion generally obscured grazing–productivity relationships. Biodiversity conservation programmes should carefully weigh the varied impacts of livestock grazing across productivity gradients
Fil: Lezama, Felipe. Universidad de la República. Facultad de Agronom ía. Unidad de Sistemas Ambientales; Uruguay
Fil: Baeza, Santiago. Universidad de la República. Facultad de Agronom ía. Unidad de Sistemas Ambientales; Uruguay
Fil: Altesor, Alice. Universidad de la República. Facultad de Ciencias. Instituto de Ecolog ía y Ciencias Ambientales; Uruguay
Fil: Cesa, Ariela. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Chaneton, Enrique Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomia; Argentina
Fil: Paruelo, José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información; Argentina
description Questions: Does the magnitude of grazing-induced changes in species composition vary with habitat productivity? How does the sign and magnitude of grazing effects on species richness and beta-diversity change with increasing productivity? Do major life forms exhibit consistent responses to grazing along productivity gradients? Location: Steppes and grasslands of southern South America in Argentina and Uruguay. Methods: We evaluated grazing effects on plant composition, species richness, beta-diversity and life-form abundances along a ten-fold, regional productivity gradient and within subregions of contrasting productivity, using a common sampling protocol for 23 paired grazed vs ungrazed plots. The annual integral of the normalized difference vegetation index was used as a surrogate for above-ground net primary productivity. Results: Compositional dissimilarity between grazed and ungrazed plots, as well as grazing-induced differences in plant richness and beta-diversity all increased with habitat productivity. Grazing decreased species richness in low-productive steppes but enhanced the richness of high-productive grasslands. On average, grazing reduced beta-diversity in high-productive sites but not in low-productive sites. Dominant species were more strongly suppressed by grazing towards productive grasslands. Grazing generally decreased shrub species cover, whereas graminoid and forb cover did not consistently change with grazing through the productivity gradient. Conclusions: Our results indicate that the overall grazing effects on vegetation structure increased along a regional productivity gradient. Yet the sign of grazing impacts on species richness and beta-diversity shifted with habitat productivity, in agreement with models of herbivore-mediated co-existence and species colonization in productive systems. Further, we found that narrowing the spatial extent of analysis to the subregion generally obscured grazing–productivity relationships. Biodiversity conservation programmes should carefully weigh the varied impacts of livestock grazing across productivity gradients
publishDate 2014
dc.date.none.fl_str_mv 2014-01
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/11336/4211
Lezama, Felipe; Baeza, Santiago; Altesor, Alice; Cesa, Ariela; Chaneton, Enrique Jose; et al.; Variation of grazing-induced vegetation changes across a large-scale productivity gradient; Wiley; Journal of Vegetation Science; 25; 1-2014; 8-21
1100-9233
url http://hdl.handle.net/11336/4211
identifier_str_mv Lezama, Felipe; Baeza, Santiago; Altesor, Alice; Cesa, Ariela; Chaneton, Enrique Jose; et al.; Variation of grazing-induced vegetation changes across a large-scale productivity gradient; Wiley; Journal of Vegetation Science; 25; 1-2014; 8-21
1100-9233
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/jvs.12053/abstract
info:eu-repo/semantics/altIdentifier/doi/DOI:10.1111/jvs.12053
info:eu-repo/semantics/altIdentifier/issn/1100-9233
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
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
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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