Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia
Decomposition of fine roots is a fundamental ecosystem process that relates to carbon (C) and nutrient cycling in terrestrial ecosystems. However, this important ecosystem process has been hardly studied in Patagonian ecosystems. The aim of this work was to study root decomposition and nutrient rele...
Published in: | Austral Ecology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | http://hdl.handle.net/20.500.12123/3937 https://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12672 https://doi.org/10.1111/aec.12672 |
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ftargentinainta:oai:localhost:20.500.12123/3937 2023-05-15T14:03:37+02:00 Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia Gargaglione, Veronica Beatriz Bahamonde, Héctor Alejandro Peri, Pablo Luis 2018-10-25 application/pdf http://hdl.handle.net/20.500.12123/3937 https://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12672 https://doi.org/10.1111/aec.12672 eng eng Wiley https://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12672 http://hdl.handle.net/20.500.12123/3937 1442-9985 1442-9993 https://doi.org/10.1111/aec.12672 info:eu-repo/semantics/restrictedAccess Austral Ecology First published: 25 October 2018 Nothofagus Ecosistema Carbono Medio Ambiente Raíces Degradación Fertilidad del Suelo Ecosystems Carbon Environment Roots Degradation Soil Fertility Región Patagónica Contenido de Nutrientes (Suelo) info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftargentinainta https://doi.org/10.1111/aec.12672 2020-09-21T15:25:49Z Decomposition of fine roots is a fundamental ecosystem process that relates to carbon (C) and nutrient cycling in terrestrial ecosystems. However, this important ecosystem process has been hardly studied in Patagonian ecosystems. The aim of this work was to study root decomposition and nutrient release from fine roots of grasses and trees (Nothofagus antarctica) across a range of Patagonian ecosystems that included steppe, primary forest and silvopastoral forests. After 2.2 years of decomposition in the field all roots retained 70–90% of their original mass, and decomposition rates were 0.09 and 0.15 year−1 for grass roots in steppe and primary forest, respectively. For N. antarctica roots, no significant differences were found in rates of decay between primary and silvopastoral forests (k = 0.07 year−1). Possibly low temperatures of these southern sites restricted decomposition by microorganisms. Nutrient release differed between sites and root types. Across all ecosystem categories, nitrogen (N) retention in decomposing biomass followed the order: tree roots > roots of forest grasses > roots of steppe grasses. Phosphorus (P) was retained in grass roots in forest plots but was released during decomposition of tree and steppe grass roots. Calcium (Ca) dynamics also was different between root types, since trees showed retention during the initial phase, whereas grass roots showed a slow and consistent Ca release during decomposition. Potassium (K) was the only nutrient that was rapidly released from both grass and tree roots in both grasslands and woodlands. We found that silvopastoral use of N. antarctica forests does not affect grass or tree root decomposition and/or nutrient release, since no significant differences were found for any nutrient according to ecosystem type. Information about tree and grass root decomposition found in this work could be useful to understand C and nutrient cycling in these southern ecosystems, which are characterized by extreme climatic conditions. EEA Santa Cruz Fil: Gargaglione, Veronica Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina Fil: Bahamonde, Héctor Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Article in Journal/Newspaper Antarc* Antarctica Inta Digital (ID - Instituto Nacional de Tecnología Agropecuaria) Austral Patagonia Argentina Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Bahamonde ENVELOPE(-60.783,-60.783,-62.450,-62.450) Austral Ecology 44 2 276 289 |
institution |
Open Polar |
collection |
Inta Digital (ID - Instituto Nacional de Tecnología Agropecuaria) |
op_collection_id |
ftargentinainta |
language |
English |
topic |
Nothofagus Ecosistema Carbono Medio Ambiente Raíces Degradación Fertilidad del Suelo Ecosystems Carbon Environment Roots Degradation Soil Fertility Región Patagónica Contenido de Nutrientes (Suelo) |
spellingShingle |
Nothofagus Ecosistema Carbono Medio Ambiente Raíces Degradación Fertilidad del Suelo Ecosystems Carbon Environment Roots Degradation Soil Fertility Región Patagónica Contenido de Nutrientes (Suelo) Gargaglione, Veronica Beatriz Bahamonde, Héctor Alejandro Peri, Pablo Luis Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia |
topic_facet |
Nothofagus Ecosistema Carbono Medio Ambiente Raíces Degradación Fertilidad del Suelo Ecosystems Carbon Environment Roots Degradation Soil Fertility Región Patagónica Contenido de Nutrientes (Suelo) |
description |
Decomposition of fine roots is a fundamental ecosystem process that relates to carbon (C) and nutrient cycling in terrestrial ecosystems. However, this important ecosystem process has been hardly studied in Patagonian ecosystems. The aim of this work was to study root decomposition and nutrient release from fine roots of grasses and trees (Nothofagus antarctica) across a range of Patagonian ecosystems that included steppe, primary forest and silvopastoral forests. After 2.2 years of decomposition in the field all roots retained 70–90% of their original mass, and decomposition rates were 0.09 and 0.15 year−1 for grass roots in steppe and primary forest, respectively. For N. antarctica roots, no significant differences were found in rates of decay between primary and silvopastoral forests (k = 0.07 year−1). Possibly low temperatures of these southern sites restricted decomposition by microorganisms. Nutrient release differed between sites and root types. Across all ecosystem categories, nitrogen (N) retention in decomposing biomass followed the order: tree roots > roots of forest grasses > roots of steppe grasses. Phosphorus (P) was retained in grass roots in forest plots but was released during decomposition of tree and steppe grass roots. Calcium (Ca) dynamics also was different between root types, since trees showed retention during the initial phase, whereas grass roots showed a slow and consistent Ca release during decomposition. Potassium (K) was the only nutrient that was rapidly released from both grass and tree roots in both grasslands and woodlands. We found that silvopastoral use of N. antarctica forests does not affect grass or tree root decomposition and/or nutrient release, since no significant differences were found for any nutrient according to ecosystem type. Information about tree and grass root decomposition found in this work could be useful to understand C and nutrient cycling in these southern ecosystems, which are characterized by extreme climatic conditions. EEA Santa Cruz Fil: Gargaglione, Veronica Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina Fil: Bahamonde, Héctor Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
format |
Article in Journal/Newspaper |
author |
Gargaglione, Veronica Beatriz Bahamonde, Héctor Alejandro Peri, Pablo Luis |
author_facet |
Gargaglione, Veronica Beatriz Bahamonde, Héctor Alejandro Peri, Pablo Luis |
author_sort |
Gargaglione, Veronica Beatriz |
title |
Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia |
title_short |
Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia |
title_full |
Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia |
title_fullStr |
Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia |
title_full_unstemmed |
Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia |
title_sort |
decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern patagonia |
publisher |
Wiley |
publishDate |
2018 |
url |
http://hdl.handle.net/20.500.12123/3937 https://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12672 https://doi.org/10.1111/aec.12672 |
long_lat |
ENVELOPE(-63.717,-63.717,-64.283,-64.283) ENVELOPE(-60.783,-60.783,-62.450,-62.450) |
geographic |
Austral Patagonia Argentina Pablo Bahamonde |
geographic_facet |
Austral Patagonia Argentina Pablo Bahamonde |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Austral Ecology First published: 25 October 2018 |
op_relation |
https://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12672 http://hdl.handle.net/20.500.12123/3937 1442-9985 1442-9993 https://doi.org/10.1111/aec.12672 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/aec.12672 |
container_title |
Austral Ecology |
container_volume |
44 |
container_issue |
2 |
container_start_page |
276 |
op_container_end_page |
289 |
_version_ |
1766274403097640960 |