Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands
Arbuscular mycorrhizal (AM) fungi play a major role in maintaining ecosystem functions. AM fungi are found in most ecosystems including rangelands currently under increasing pressures from human activities. Southern Patagonia (Argentina) is a semiarid region influenced by extensive livestock product...
| Main Authors: | , , |
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
Elsevier
2022
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/11138 https://www.sciencedirect.com/science/article/abs/pii/S155074242100124X https://doi.org/10.1016/j.rama.2021.11.005 |
| _version_ | 1855484721402740736 |
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| author | Toledo, Santiago Peri, Pablo Luis Fontenla, Sonia Beatriz |
| author_browse | Fontenla, Sonia Beatriz Peri, Pablo Luis Toledo, Santiago |
| author_facet | Toledo, Santiago Peri, Pablo Luis Fontenla, Sonia Beatriz |
| author_sort | Toledo, Santiago |
| collection | INTA Digital |
| description | Arbuscular mycorrhizal (AM) fungi play a major role in maintaining ecosystem functions. AM fungi are found in most ecosystems including rangelands currently under increasing pressures from human activities. Southern Patagonia (Argentina) is a semiarid region influenced by extensive livestock production in rangelands. There is a lack of information about the environmental conditions and functionality of AM fungi in plant species of Patagonia ecosystems associated with livestock grazing. We assessed how soil
properties, climatic conditions, and grazing intensities influence the response of AM fungi colonization. We studied most palatable and representative plant species (Poa dusenii, Rytidosperma virescens, Festuca gracillima, Nardophylum bryoides, Mulguraea tridens, and Carex argentina) growing in main ecological areas of Southern Patagonia. Most of the studied plant species (except C. argentina) presented AM symbiosis. AM colonization showed a negative relationship with soil organic carbon and nitrogen and a positive relationship with soil bulk density and pH. Results suggest that plants promoted a higher root AM colonization when soil nutrients and water availability (rainfall) are limiting. Sheep stocking rates had a differential impact depending on the ecological areas and plant life forms. High grazing decreased the AM colonization in the ecological areas with palatable plant dominance, suggesting that the impacts of grazing could lead to further negative effects on the ecosystem. Moderate grazing allows to maintain higher AM colonization, which would probably benefit the aboveground production of palatable plant and, consequently, to herbivores, particularly in degraded rangelands like Patagonian steppes. This study improves the knowledge of AM association in Patagonian semiarid rangelands by increasing our understanding of the impacts of grazing on belowground ecology. This information becomes relevant for grazing sustainable management, which may contribute to food security. |
| format | Artículo |
| id | INTA11138 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA111382023-04-17T17:33:47Z Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands Toledo, Santiago Peri, Pablo Luis Fontenla, Sonia Beatriz Grasslands Drylands Livestock Soil Symbiosis Arbuscular Mycorrhiza Grazing Praderas Tierras de Secano Ganado Suelo Simbiosis Micorrizas Arbusculares Pastoreo Poa dusenii Rytidosperma virescens Festuca gracillima Nardophylum bryoides Mulguraea tridens Carex argentina Región Patagónica Arbuscular mycorrhizal (AM) fungi play a major role in maintaining ecosystem functions. AM fungi are found in most ecosystems including rangelands currently under increasing pressures from human activities. Southern Patagonia (Argentina) is a semiarid region influenced by extensive livestock production in rangelands. There is a lack of information about the environmental conditions and functionality of AM fungi in plant species of Patagonia ecosystems associated with livestock grazing. We assessed how soil properties, climatic conditions, and grazing intensities influence the response of AM fungi colonization. We studied most palatable and representative plant species (Poa dusenii, Rytidosperma virescens, Festuca gracillima, Nardophylum bryoides, Mulguraea tridens, and Carex argentina) growing in main ecological areas of Southern Patagonia. Most of the studied plant species (except C. argentina) presented AM symbiosis. AM colonization showed a negative relationship with soil organic carbon and nitrogen and a positive relationship with soil bulk density and pH. Results suggest that plants promoted a higher root AM colonization when soil nutrients and water availability (rainfall) are limiting. Sheep stocking rates had a differential impact depending on the ecological areas and plant life forms. High grazing decreased the AM colonization in the ecological areas with palatable plant dominance, suggesting that the impacts of grazing could lead to further negative effects on the ecosystem. Moderate grazing allows to maintain higher AM colonization, which would probably benefit the aboveground production of palatable plant and, consequently, to herbivores, particularly in degraded rangelands like Patagonian steppes. This study improves the knowledge of AM association in Patagonian semiarid rangelands by increasing our understanding of the impacts of grazing on belowground ecology. This information becomes relevant for grazing sustainable management, which may contribute to food security. EEA Santa Cruz Fil: Toledo, Santiago. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Toledo, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. CIT Santa Cruz; Argentina. Fil: Toledo, Santiago. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Fil: Peri, Pablo Luis. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Peri, Pablo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fil: Fontenla, Sonia B. Universidad Nacional del Comahue. Laboratorio de Biotecnología y Microbiologia Aplicad; Argentina. 2022-02-14T12:47:48Z 2022-02-14T12:47:48Z 2022-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/11138 https://www.sciencedirect.com/science/article/abs/pii/S155074242100124X Santiago Toledo, Pablo L. Peri, Sonia B. Fontenla, Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands, Rangeland Ecology & Management, Volume 81, 2022, Pages 44-54, ISSN 1550-7424, https://doi.org/10.1016/j.rama.2021.11.005. 1550-7424 https://doi.org/10.1016/j.rama.2021.11.005 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Rangeland Ecology & Management 81 : 44-54. (March 2022) |
| spellingShingle | Grasslands Drylands Livestock Soil Symbiosis Arbuscular Mycorrhiza Grazing Praderas Tierras de Secano Ganado Suelo Simbiosis Micorrizas Arbusculares Pastoreo Poa dusenii Rytidosperma virescens Festuca gracillima Nardophylum bryoides Mulguraea tridens Carex argentina Región Patagónica Toledo, Santiago Peri, Pablo Luis Fontenla, Sonia Beatriz Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands |
| title | Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands |
| title_full | Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands |
| title_fullStr | Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands |
| title_full_unstemmed | Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands |
| title_short | Environmental Conditions and Grazing Exerted Effects on Arbuscular Mycorrhizal in Plants at Southern Patagonia Rangelands |
| title_sort | environmental conditions and grazing exerted effects on arbuscular mycorrhizal in plants at southern patagonia rangelands |
| topic | Grasslands Drylands Livestock Soil Symbiosis Arbuscular Mycorrhiza Grazing Praderas Tierras de Secano Ganado Suelo Simbiosis Micorrizas Arbusculares Pastoreo Poa dusenii Rytidosperma virescens Festuca gracillima Nardophylum bryoides Mulguraea tridens Carex argentina Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/11138 https://www.sciencedirect.com/science/article/abs/pii/S155074242100124X https://doi.org/10.1016/j.rama.2021.11.005 |
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