Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
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...
| Autores principales: | , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Taylor & Francis
2022
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| Materias: | |
| Acceso en línea: | 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 |
| _version_ | 1855036595484229632 |
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| author | Ledesma, Roxana Ramona Bravo, Sandra Kunst, Carlos Roberto Elías, Antonio Godoy, Jose Alberto Navarrete, Victor Del Carmen |
| author_browse | Bravo, Sandra Elías, Antonio Godoy, Jose Alberto Kunst, Carlos Roberto Ledesma, Roxana Ramona Navarrete, Victor Del Carmen |
| author_facet | Ledesma, Roxana Ramona Bravo, Sandra Kunst, Carlos Roberto Elías, Antonio Godoy, Jose Alberto Navarrete, Victor Del Carmen |
| author_sort | Ledesma, Roxana Ramona |
| collection | INTA Digital |
| 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. |
| format | info:ar-repo/semantics/artículo |
| id | INTA11559 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Taylor & Francis |
| publisherStr | Taylor & Francis |
| record_format | dspace |
| spelling | INTA115592022-04-05T13:21:44Z Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina Ledesma, Roxana Ramona Bravo, Sandra Kunst, Carlos Roberto Elías, Antonio Godoy, Jose Alberto Navarrete, Victor Del Carmen Gramineas Arbustos Raíces Ecología Grasses Shrubs Roots Ecology Región Chaco Semiárido 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 2022-04-05T13:18:59Z 2022-04-05T13:18:59Z 2021-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 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 eng 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) info:eu-repo/semantics/restrictedAccess application/pdf Taylor & Francis Arid Land Research and Management : 1-13 ( Published online: 28 Dec 2021) |
| spellingShingle | Gramineas Arbustos Raíces Ecología Grasses Shrubs Roots Ecology Región Chaco Semiárido Ledesma, Roxana Ramona Bravo, Sandra Kunst, Carlos Roberto Elías, Antonio Godoy, Jose Alberto Navarrete, Victor Del Carmen 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 |
| 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_short | 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 |
| topic | Gramineas Arbustos Raíces Ecología Grasses Shrubs Roots Ecology Región Chaco Semiárido |
| 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 |
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