Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina

Autores
Prieto, Luciano Hernan; Bertiller, Monica Beatriz; Carrera, Analía Lorena; Olivera, Nelda Lila
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Grazers exert important effects on the plant-soil system influencing the structure and functioning of the ecosystems. The effect of grazing on soil enzyme and microbial activities in arid ecosystems of the Patagonian Monte (Argentina) was studied by assessing the cover of plant life forms (grasses, shrubs and dwarf shrubs) at five modal plant-covered patches at three sites across a grazing gradient. We hypothesized that grazing mostly affects negatively soil enzyme and microbial activities through its effect on vegetation and on soil chemical and physical parameters. Soil cores were extracted from plant-covered patches and associated inter-canopy areas and analyzed the chemical (organic-C, total-N and pH), physical (bulk density), microbial (microbial biomass-C, and heterotrophic microorganism counts), and enzyme (dehydrogenase, ß-glucosidase, protease, alkaline and acid phosphatase and the geometric media for these activities) soil properties. Grass and dwarf shrub covers declined, and soil pH and bulk density increased with increasing grazing intensity at plant patches and inter-canopy areas. Soil organic-C and soil-N decreased at plant patches and, were positively correlated to grass cover. Soil organic-C was also positively correlated with ß-glucosidases and phosphatases, indicating that a reduction in soil organic-C could be associated with low enzyme activity and consequently with low soil organic matter turnover and nutrient release. Negative effects of grazing on enzyme activities were also detected on protease activity at inter-canopy areas and geometric media of the enzyme activities at plant patches. Increasing grazing intensity was associated with increasing values of microbial biomass-C and heterotrophic microorganism counts mostly at inter-canopy areas, suggesting that inputs of labile N by urine and dung may partially counteract the negative grazing effects. We concluded that grazing mostly affected soil physicochemical and biological parameters through direct and indirect effects of trampling and urine and changes in perennial grass cover, respectively.
Fil: Prieto, Luciano Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Carrera, Analía Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Olivera, Nelda Lila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Materia
ARID ECOSYSTEMS
GRAZING IMPACT
SOIL ENZYMES
SOIL MICROBIAL ACTIVITY
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:11336/84892
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/84892
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, ArgentinaPrieto, Luciano HernanBertiller, Monica BeatrizCarrera, Analía LorenaOlivera, Nelda LilaARID ECOSYSTEMSGRAZING IMPACTSOIL ENZYMESSOIL MICROBIAL ACTIVITYhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Grazers exert important effects on the plant-soil system influencing the structure and functioning of the ecosystems. The effect of grazing on soil enzyme and microbial activities in arid ecosystems of the Patagonian Monte (Argentina) was studied by assessing the cover of plant life forms (grasses, shrubs and dwarf shrubs) at five modal plant-covered patches at three sites across a grazing gradient. We hypothesized that grazing mostly affects negatively soil enzyme and microbial activities through its effect on vegetation and on soil chemical and physical parameters. Soil cores were extracted from plant-covered patches and associated inter-canopy areas and analyzed the chemical (organic-C, total-N and pH), physical (bulk density), microbial (microbial biomass-C, and heterotrophic microorganism counts), and enzyme (dehydrogenase, ß-glucosidase, protease, alkaline and acid phosphatase and the geometric media for these activities) soil properties. Grass and dwarf shrub covers declined, and soil pH and bulk density increased with increasing grazing intensity at plant patches and inter-canopy areas. Soil organic-C and soil-N decreased at plant patches and, were positively correlated to grass cover. Soil organic-C was also positively correlated with ß-glucosidases and phosphatases, indicating that a reduction in soil organic-C could be associated with low enzyme activity and consequently with low soil organic matter turnover and nutrient release. Negative effects of grazing on enzyme activities were also detected on protease activity at inter-canopy areas and geometric media of the enzyme activities at plant patches. Increasing grazing intensity was associated with increasing values of microbial biomass-C and heterotrophic microorganism counts mostly at inter-canopy areas, suggesting that inputs of labile N by urine and dung may partially counteract the negative grazing effects. We concluded that grazing mostly affected soil physicochemical and biological parameters through direct and indirect effects of trampling and urine and changes in perennial grass cover, respectively.Fil: Prieto, Luciano Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Carrera, Analía Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Olivera, Nelda Lila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaElsevier Science2011-05info: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/11336/84892Prieto, Luciano Hernan; Bertiller, Monica Beatriz; Carrera, Analía Lorena; Olivera, Nelda Lila; Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina; Elsevier Science; Geoderma; 162; 3-4; 5-2011; 281-2870016-7061CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.geoderma.2011.02.011info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0016706111000486info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:34:21Zoai:ri.conicet.gov.ar:11336/84892instacron: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 09:34:21.543CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
title Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
spellingShingle Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
Prieto, Luciano Hernan
ARID ECOSYSTEMS
GRAZING IMPACT
SOIL ENZYMES
SOIL MICROBIAL ACTIVITY
title_short Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
title_full Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
title_fullStr Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
title_full_unstemmed Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
title_sort Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina
dc.creator.none.fl_str_mv Prieto, Luciano Hernan
Bertiller, Monica Beatriz
Carrera, Analía Lorena
Olivera, Nelda Lila
author Prieto, Luciano Hernan
author_facet Prieto, Luciano Hernan
Bertiller, Monica Beatriz
Carrera, Analía Lorena
Olivera, Nelda Lila
author_role author
author2 Bertiller, Monica Beatriz
Carrera, Analía Lorena
Olivera, Nelda Lila
author2_role author
author
author
dc.subject.none.fl_str_mv ARID ECOSYSTEMS
GRAZING IMPACT
SOIL ENZYMES
SOIL MICROBIAL ACTIVITY
topic ARID ECOSYSTEMS
GRAZING IMPACT
SOIL ENZYMES
SOIL MICROBIAL ACTIVITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Grazers exert important effects on the plant-soil system influencing the structure and functioning of the ecosystems. The effect of grazing on soil enzyme and microbial activities in arid ecosystems of the Patagonian Monte (Argentina) was studied by assessing the cover of plant life forms (grasses, shrubs and dwarf shrubs) at five modal plant-covered patches at three sites across a grazing gradient. We hypothesized that grazing mostly affects negatively soil enzyme and microbial activities through its effect on vegetation and on soil chemical and physical parameters. Soil cores were extracted from plant-covered patches and associated inter-canopy areas and analyzed the chemical (organic-C, total-N and pH), physical (bulk density), microbial (microbial biomass-C, and heterotrophic microorganism counts), and enzyme (dehydrogenase, ß-glucosidase, protease, alkaline and acid phosphatase and the geometric media for these activities) soil properties. Grass and dwarf shrub covers declined, and soil pH and bulk density increased with increasing grazing intensity at plant patches and inter-canopy areas. Soil organic-C and soil-N decreased at plant patches and, were positively correlated to grass cover. Soil organic-C was also positively correlated with ß-glucosidases and phosphatases, indicating that a reduction in soil organic-C could be associated with low enzyme activity and consequently with low soil organic matter turnover and nutrient release. Negative effects of grazing on enzyme activities were also detected on protease activity at inter-canopy areas and geometric media of the enzyme activities at plant patches. Increasing grazing intensity was associated with increasing values of microbial biomass-C and heterotrophic microorganism counts mostly at inter-canopy areas, suggesting that inputs of labile N by urine and dung may partially counteract the negative grazing effects. We concluded that grazing mostly affected soil physicochemical and biological parameters through direct and indirect effects of trampling and urine and changes in perennial grass cover, respectively.
Fil: Prieto, Luciano Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Bertiller, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Carrera, Analía Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Olivera, Nelda Lila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
description Grazers exert important effects on the plant-soil system influencing the structure and functioning of the ecosystems. The effect of grazing on soil enzyme and microbial activities in arid ecosystems of the Patagonian Monte (Argentina) was studied by assessing the cover of plant life forms (grasses, shrubs and dwarf shrubs) at five modal plant-covered patches at three sites across a grazing gradient. We hypothesized that grazing mostly affects negatively soil enzyme and microbial activities through its effect on vegetation and on soil chemical and physical parameters. Soil cores were extracted from plant-covered patches and associated inter-canopy areas and analyzed the chemical (organic-C, total-N and pH), physical (bulk density), microbial (microbial biomass-C, and heterotrophic microorganism counts), and enzyme (dehydrogenase, ß-glucosidase, protease, alkaline and acid phosphatase and the geometric media for these activities) soil properties. Grass and dwarf shrub covers declined, and soil pH and bulk density increased with increasing grazing intensity at plant patches and inter-canopy areas. Soil organic-C and soil-N decreased at plant patches and, were positively correlated to grass cover. Soil organic-C was also positively correlated with ß-glucosidases and phosphatases, indicating that a reduction in soil organic-C could be associated with low enzyme activity and consequently with low soil organic matter turnover and nutrient release. Negative effects of grazing on enzyme activities were also detected on protease activity at inter-canopy areas and geometric media of the enzyme activities at plant patches. Increasing grazing intensity was associated with increasing values of microbial biomass-C and heterotrophic microorganism counts mostly at inter-canopy areas, suggesting that inputs of labile N by urine and dung may partially counteract the negative grazing effects. We concluded that grazing mostly affected soil physicochemical and biological parameters through direct and indirect effects of trampling and urine and changes in perennial grass cover, respectively.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
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/11336/84892
Prieto, Luciano Hernan; Bertiller, Monica Beatriz; Carrera, Analía Lorena; Olivera, Nelda Lila; Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina; Elsevier Science; Geoderma; 162; 3-4; 5-2011; 281-287
0016-7061
CONICET Digital
CONICET
url http://hdl.handle.net/11336/84892
identifier_str_mv Prieto, Luciano Hernan; Bertiller, Monica Beatriz; Carrera, Analía Lorena; Olivera, Nelda Lila; Soil enzyme and microbial activities in a grazing ecosystem of Patagonian Monte, Argentina; Elsevier Science; Geoderma; 162; 3-4; 5-2011; 281-287
0016-7061
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.geoderma.2011.02.011
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0016706111000486
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
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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