Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina

Autores
Ledesma, Roxana Ramona; Bravo, Sandra; Kunst, Carlos Roberto; Elías, Antonio; Godoy, Jose Alberto; Navarrete, Victor Del Carmen
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The objective of this study was to analyze the root distribution of grasses and shrubs, at different soil depths, in two ecological sites (ES): highland (forest) and lowland (grassland). The root density (RD) estimation was used as a proxy to test the two-layer hypothesis. Three trenches were dug in both ES and the number of roots m−2 was registered at different depth classes. The roots were classified in categories: (a) life forms (LF), grasses and shrubs and (b) root size (diameter): fine (<0.1 cm), small (0.11–0.5 cm); medium (0.51–1.5 cm) and large (>1.51 cm). Soil bulk density (Bd) was assessed by gravimetric method and its relation with RD was determined by regression analysis. RD was analyzed by using ANOVA with the factors: ES, LF, depth and root size. There were no significant differences in RD between the ES but RD significantly decreased with depth in both ES. In the upper horizons of the forest, there was higher shrubs RD (764 roots m2) than grass RD (128 roots m2) (p < 0.0001). In grassland, grass RD was registered in all the depths. Mean fine root density was greater than the mean of other root size categories. The relationship between RD and Bd was negative and only significant in the forest (p = 0.009). The distribution of roots of both LF in the soil profile of both ES did not respond completely to the two-layer hypothesis since in upper horizons an overlap was observed.
EEA Santiago del Estero
Fil: Ledesma, Roxana Ramona. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Bravo, Sandra. Universidad Nacional de Santiago del Estero. Facultad de Ciencias Forestales; Argentina
Fil: Kunst, Carlos Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Elías, Antonio. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina
Fil: Godoy, Jose Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Navarrete, Victor Del Carmen. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fuente
Arid Land Research and Management : 1-13 ( Published online: 28 Dec 2021)
Materia
Gramineas
Arbustos
Raíces
Ecología
Grasses
Shrubs
Roots
Ecology
Región Chaco Semiárido
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/11559
Acceder
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oai_identifier_str oai:localhost:20.500.12123/11559
network_acronym_str INTADig
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network_name_str INTA Digital (INTA)
spelling Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, ArgentinaLedesma, Roxana RamonaBravo, SandraKunst, Carlos RobertoElías, AntonioGodoy, Jose AlbertoNavarrete, Victor Del CarmenGramineasArbustosRaícesEcologíaGrassesShrubsRootsEcologyRegión Chaco SemiáridoThe objective of this study was to analyze the root distribution of grasses and shrubs, at different soil depths, in two ecological sites (ES): highland (forest) and lowland (grassland). The root density (RD) estimation was used as a proxy to test the two-layer hypothesis. Three trenches were dug in both ES and the number of roots m−2 was registered at different depth classes. The roots were classified in categories: (a) life forms (LF), grasses and shrubs and (b) root size (diameter): fine (<0.1 cm), small (0.11–0.5 cm); medium (0.51–1.5 cm) and large (>1.51 cm). Soil bulk density (Bd) was assessed by gravimetric method and its relation with RD was determined by regression analysis. RD was analyzed by using ANOVA with the factors: ES, LF, depth and root size. There were no significant differences in RD between the ES but RD significantly decreased with depth in both ES. In the upper horizons of the forest, there was higher shrubs RD (764 roots m2) than grass RD (128 roots m2) (p < 0.0001). In grassland, grass RD was registered in all the depths. Mean fine root density was greater than the mean of other root size categories. The relationship between RD and Bd was negative and only significant in the forest (p = 0.009). The distribution of roots of both LF in the soil profile of both ES did not respond completely to the two-layer hypothesis since in upper horizons an overlap was observed.EEA Santiago del EsteroFil: Ledesma, Roxana Ramona. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaFil: Bravo, Sandra. Universidad Nacional de Santiago del Estero. Facultad de Ciencias Forestales; ArgentinaFil: Kunst, Carlos Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaFil: Elías, Antonio. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; ArgentinaFil: Godoy, Jose Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaFil: Navarrete, Victor Del Carmen. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; ArgentinaTaylor & Francis2022-04-05T13:18:59Z2022-04-05T13:18:59Z2021-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/11559https://www.tandfonline.com/doi/abs/10.1080/15324982.2021.20170741532-49821532-4990https://doi.org/10.1080/15324982.2021.2017074Arid Land Research and Management : 1-13 ( Published online: 28 Dec 2021)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repograntAgreement/INTA/2019-PE-E1-I504-001/2019-PE-E1-I504-001/AR./Tecnologías para el incremento forrajero y la valorización de servicios ecosistémicos en pastizales naturales con uso ganaderoinfo:eu-repograntAgreement/INTA/2019-PE-E1-I514-001/2019-PE-E1-I514-001/AR./Manejo de Bosques con Ganadería Integrada (MBGI)info:eu-repo/semantics/restrictedAccess2025-10-23T11:17:55Zoai:localhost:20.500.12123/11559instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-10-23 11:17:55.679INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
title Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
spellingShingle Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
Ledesma, Roxana Ramona
Gramineas
Arbustos
Raíces
Ecología
Grasses
Shrubs
Roots
Ecology
Región Chaco Semiárido
title_short Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
title_full Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
title_fullStr Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
title_full_unstemmed Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
title_sort Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
dc.creator.none.fl_str_mv Ledesma, Roxana Ramona
Bravo, Sandra
Kunst, Carlos Roberto
Elías, Antonio
Godoy, Jose Alberto
Navarrete, Victor Del Carmen
author Ledesma, Roxana Ramona
author_facet Ledesma, Roxana Ramona
Bravo, Sandra
Kunst, Carlos Roberto
Elías, Antonio
Godoy, Jose Alberto
Navarrete, Victor Del Carmen
author_role author
author2 Bravo, Sandra
Kunst, Carlos Roberto
Elías, Antonio
Godoy, Jose Alberto
Navarrete, Victor Del Carmen
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Gramineas
Arbustos
Raíces
Ecología
Grasses
Shrubs
Roots
Ecology
Región Chaco Semiárido
topic Gramineas
Arbustos
Raíces
Ecología
Grasses
Shrubs
Roots
Ecology
Región Chaco Semiárido
dc.description.none.fl_txt_mv The objective of this study was to analyze the root distribution of grasses and shrubs, at different soil depths, in two ecological sites (ES): highland (forest) and lowland (grassland). The root density (RD) estimation was used as a proxy to test the two-layer hypothesis. Three trenches were dug in both ES and the number of roots m−2 was registered at different depth classes. The roots were classified in categories: (a) life forms (LF), grasses and shrubs and (b) root size (diameter): fine (<0.1 cm), small (0.11–0.5 cm); medium (0.51–1.5 cm) and large (>1.51 cm). Soil bulk density (Bd) was assessed by gravimetric method and its relation with RD was determined by regression analysis. RD was analyzed by using ANOVA with the factors: ES, LF, depth and root size. There were no significant differences in RD between the ES but RD significantly decreased with depth in both ES. In the upper horizons of the forest, there was higher shrubs RD (764 roots m2) than grass RD (128 roots m2) (p < 0.0001). In grassland, grass RD was registered in all the depths. Mean fine root density was greater than the mean of other root size categories. The relationship between RD and Bd was negative and only significant in the forest (p = 0.009). The distribution of roots of both LF in the soil profile of both ES did not respond completely to the two-layer hypothesis since in upper horizons an overlap was observed.
EEA Santiago del Estero
Fil: Ledesma, Roxana Ramona. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Bravo, Sandra. Universidad Nacional de Santiago del Estero. Facultad de Ciencias Forestales; Argentina
Fil: Kunst, Carlos Roberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Elías, Antonio. Universidad Nacional de Santiago del Estero. Facultad de Agronomía y Agroindustrias; Argentina
Fil: Godoy, Jose Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
Fil: Navarrete, Victor Del Carmen. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santiago del Estero; Argentina
description The objective of this study was to analyze the root distribution of grasses and shrubs, at different soil depths, in two ecological sites (ES): highland (forest) and lowland (grassland). The root density (RD) estimation was used as a proxy to test the two-layer hypothesis. Three trenches were dug in both ES and the number of roots m−2 was registered at different depth classes. The roots were classified in categories: (a) life forms (LF), grasses and shrubs and (b) root size (diameter): fine (<0.1 cm), small (0.11–0.5 cm); medium (0.51–1.5 cm) and large (>1.51 cm). Soil bulk density (Bd) was assessed by gravimetric method and its relation with RD was determined by regression analysis. RD was analyzed by using ANOVA with the factors: ES, LF, depth and root size. There were no significant differences in RD between the ES but RD significantly decreased with depth in both ES. In the upper horizons of the forest, there was higher shrubs RD (764 roots m2) than grass RD (128 roots m2) (p < 0.0001). In grassland, grass RD was registered in all the depths. Mean fine root density was greater than the mean of other root size categories. The relationship between RD and Bd was negative and only significant in the forest (p = 0.009). The distribution of roots of both LF in the soil profile of both ES did not respond completely to the two-layer hypothesis since in upper horizons an overlap was observed.
publishDate 2021
dc.date.none.fl_str_mv 2021-12
2022-04-05T13:18:59Z
2022-04-05T13:18:59Z
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/20.500.12123/11559
https://www.tandfonline.com/doi/abs/10.1080/15324982.2021.2017074
1532-4982
1532-4990
https://doi.org/10.1080/15324982.2021.2017074
url http://hdl.handle.net/20.500.12123/11559
https://www.tandfonline.com/doi/abs/10.1080/15324982.2021.2017074
https://doi.org/10.1080/15324982.2021.2017074
identifier_str_mv 1532-4982
1532-4990
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repograntAgreement/INTA/2019-PE-E1-I504-001/2019-PE-E1-I504-001/AR./Tecnologías para el incremento forrajero y la valorización de servicios ecosistémicos en pastizales naturales con uso ganadero
info:eu-repograntAgreement/INTA/2019-PE-E1-I514-001/2019-PE-E1-I514-001/AR./Manejo de Bosques con Ganadería Integrada (MBGI)
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv Arid Land Research and Management : 1-13 ( Published online: 28 Dec 2021)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.982451

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