Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes
Tephra-derived soils retain more organic carbon (C) than soils formed from any other parent material, but this C may be sensitive to changes in climate and land use. Here we evaluate the effects of precipitation, temperature, and afforestation on extractable metals and organic C storage in young tep...
| Autores principales: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Elsevier
2024
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/17690 https://www.sciencedirect.com/science/article/pii/S0016706123003956 https://doi.org/10.1016/j.geoderma.2023.116718 |
| _version_ | 1855486016061702144 |
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| author | Hodges, Caitlin Araujo, Patricia Ines Hess, Laura J.T. Vivanco, Lucía Kaye, Jason Austin, Amy T. |
| author_browse | Araujo, Patricia Ines Austin, Amy T. Hess, Laura J.T. Hodges, Caitlin Kaye, Jason Vivanco, Lucía |
| author_facet | Hodges, Caitlin Araujo, Patricia Ines Hess, Laura J.T. Vivanco, Lucía Kaye, Jason Austin, Amy T. |
| author_sort | Hodges, Caitlin |
| collection | INTA Digital |
| description | Tephra-derived soils retain more organic carbon (C) than soils formed from any other parent material, but this C may be sensitive to changes in climate and land use. Here we evaluate the effects of precipitation, temperature, and afforestation on extractable metals and organic C storage in young tephra-derived soils in a temperate climate. We conducted our investigation across five sites in the Patagonian Andes that vary from 250 mm to 2200 mm mean annual precipitation, and 12 to 9.7 ℃ mean annual temperature from east to west. At each of the five sites are paired plots of natural vegetation, varying from grasses and shrubs at the dry sites to closed-canopy forest at the wet, and stands of Pinus ponderosa planted in monocultures 35 years prior to sampling. Previous research at these sites showed that aboveground net primary production and soil organic C increased with rainfall, but total soil organic C content was lower in pine plantations than natural vegetation. Here we assess whether variation in precipitation and vegetation type also affect soil mineral properties that promote soil C stabilization. Soils were collected to the depth of auger refusal and extracted with 0.5 M HCl for 24 h to target the combined exchangeable and adsorbed metals, including secondary short-range-ordered mineral phases and the plant available pools of Mg, Ca, and K. Pine afforestation lowered concentrations of HCl-extractable K (p < 0.1) and Ca (p < 0.01) within the top 0 – 30 cm. Other elements, while not affected by vegetation type, did respond to the rainfall gradient. Al, Si, P, and Mn all increased in the surface soils with increasing rainfall (p < 0.01), suggesting the development of short-range-order volcanic mineral phases that retain nutrients such as P and Mn. The addition of Al and Ca in the linear model to describe soil organic C explained more of the total variance than rainfall and vegetation type alone, indicating the importance of Al complexes and cation (Ca) bridging with secondary minerals to soil C retention. Importantly, the lower concentration of Ca in planted pine soils may signal a long-term decrease in the potential soil C stored in afforested soils due to a lower capacity for cation bridging. Our results show that the chemistry of these young tephra soils is dynamic, responding to both precipitation and afforestation in distinct ways with potential long-term impacts on nutrient cycling and C storage. |
| format | Artículo |
| id | INTA17690 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA176902024-05-10T13:13:40Z Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes Hodges, Caitlin Araujo, Patricia Ines Hess, Laura J.T. Vivanco, Lucía Kaye, Jason Austin, Amy T. Suelo Carbono Orgánico del Suelo Reforestación Materia Orgánica del Suelo Soil Soil Organic Carbon Reforestation Soil Organic Matter Afforestation Aforestación Andisol Tephra Cation Bridging Región Patagónica Tephra-derived soils retain more organic carbon (C) than soils formed from any other parent material, but this C may be sensitive to changes in climate and land use. Here we evaluate the effects of precipitation, temperature, and afforestation on extractable metals and organic C storage in young tephra-derived soils in a temperate climate. We conducted our investigation across five sites in the Patagonian Andes that vary from 250 mm to 2200 mm mean annual precipitation, and 12 to 9.7 ℃ mean annual temperature from east to west. At each of the five sites are paired plots of natural vegetation, varying from grasses and shrubs at the dry sites to closed-canopy forest at the wet, and stands of Pinus ponderosa planted in monocultures 35 years prior to sampling. Previous research at these sites showed that aboveground net primary production and soil organic C increased with rainfall, but total soil organic C content was lower in pine plantations than natural vegetation. Here we assess whether variation in precipitation and vegetation type also affect soil mineral properties that promote soil C stabilization. Soils were collected to the depth of auger refusal and extracted with 0.5 M HCl for 24 h to target the combined exchangeable and adsorbed metals, including secondary short-range-ordered mineral phases and the plant available pools of Mg, Ca, and K. Pine afforestation lowered concentrations of HCl-extractable K (p < 0.1) and Ca (p < 0.01) within the top 0 – 30 cm. Other elements, while not affected by vegetation type, did respond to the rainfall gradient. Al, Si, P, and Mn all increased in the surface soils with increasing rainfall (p < 0.01), suggesting the development of short-range-order volcanic mineral phases that retain nutrients such as P and Mn. The addition of Al and Ca in the linear model to describe soil organic C explained more of the total variance than rainfall and vegetation type alone, indicating the importance of Al complexes and cation (Ca) bridging with secondary minerals to soil C retention. Importantly, the lower concentration of Ca in planted pine soils may signal a long-term decrease in the potential soil C stored in afforested soils due to a lower capacity for cation bridging. Our results show that the chemistry of these young tephra soils is dynamic, responding to both precipitation and afforestation in distinct ways with potential long-term impacts on nutrient cycling and C storage. EEA Pergamino Fil: Hodges, Caitlin. University of Oklahoma. School of Geosciences; Estados Unidos Fil: Araujo, Patricia Inés. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Laboratorio de Suelo; Argentina Fil: Araujo, Patricia Inés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Hess, Laura J. T. Universidad de Buenos Aires. Facultad de agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Hess, Laura J. T. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Vivanco, Lucía. Universidad de Buenos Aires. Facultad de agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Vivanco, Lucía. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Kaye, Jason. The Pennsylvania State University. Department of Ecosystem Science and Management; Estados Unidos Fil: Austin, Amy T. Universidad de Buenos Aires. Facultad de agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Austin, Amy T. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2024-05-10T11:25:08Z 2024-05-10T11:25:08Z 2023-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/17690 https://www.sciencedirect.com/science/article/pii/S0016706123003956 0016-7061 1872-6259 https://doi.org/10.1016/j.geoderma.2023.116718 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Elsevier Geoderma 440 : 116718. (December 2023). |
| spellingShingle | Suelo Carbono Orgánico del Suelo Reforestación Materia Orgánica del Suelo Soil Soil Organic Carbon Reforestation Soil Organic Matter Afforestation Aforestación Andisol Tephra Cation Bridging Región Patagónica Hodges, Caitlin Araujo, Patricia Ines Hess, Laura J.T. Vivanco, Lucía Kaye, Jason Austin, Amy T. Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes |
| title | Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes |
| title_full | Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes |
| title_fullStr | Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes |
| title_full_unstemmed | Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes |
| title_short | Metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the Patagonian Andes |
| title_sort | metal cation concentrations improve understanding of controls on soil organic carbon across a precipitation by vegetation gradient in the patagonian andes |
| topic | Suelo Carbono Orgánico del Suelo Reforestación Materia Orgánica del Suelo Soil Soil Organic Carbon Reforestation Soil Organic Matter Afforestation Aforestación Andisol Tephra Cation Bridging Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/17690 https://www.sciencedirect.com/science/article/pii/S0016706123003956 https://doi.org/10.1016/j.geoderma.2023.116718 |
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