Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands
Nitrogen (N) cycling in rangeland soils could potentially be controlled by water supply, stocking rates, or a range of other variables, such as ecosystem N stocks. To gauge the relative importance and elucidate possible interactions among these factors, we measured many abiotic variables to identif...
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| Format: | Artículo |
| Language: | Inglés |
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American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
2022
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| Online Access: | http://hdl.handle.net/20.500.12123/11351 https://acsess.onlinelibrary.wiley.com/doi/full/10.1002/vzj2.20183 https://doi.org/10.1002/vzj2.20183 |
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| author | Peri, Pablo Luis Duarte Guardia, Sandra Amelung, Wulf Ladd, Brenton |
| author_browse | Amelung, Wulf Duarte Guardia, Sandra Ladd, Brenton Peri, Pablo Luis |
| author_facet | Peri, Pablo Luis Duarte Guardia, Sandra Amelung, Wulf Ladd, Brenton |
| author_sort | Peri, Pablo Luis |
| collection | INTA Digital |
| description | Nitrogen (N) cycling in rangeland soils could potentially be controlled by water supply, stocking rates, or a range of other variables, such as ecosystem N stocks. To gauge the relative importance and elucidate possible interactions among these factors, we
measured many abiotic variables to identify first-order controls of δ15N for Patagonia’s rangeland soils under contrasting historical grazing intensities. The results showed that δ15N values declined as water availability increased. The effects of precipitation and stocking rate on soil δ15N values were additive, and the effect of precipitation far outweighed the effects of grazing pressure. The soil N stock was a weak predictive variable for modeling variation in δ15N of the soil. Earlier assumptions about an inflection point for N cycling and δ15N values related to aridity were not confirmed. We conclude that variation in water availability drives variation in δ15N
values irrespective of grazing intensity. We also conclude that meaningful interpretation of δ15N in soil will require a better mechanistic understanding of the interactions between water and N in the vadose zone than we currently possess. |
| format | Artículo |
| id | INTA11351 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
| publisherStr | American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
| record_format | dspace |
| spelling | INTA113512022-03-09T13:44:39Z Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands Peri, Pablo Luis Duarte Guardia, Sandra Amelung, Wulf Ladd, Brenton Nitrogen Precipitation Soil Rangelands Semiarid Zones Abiotic Factors Water Availability Grazing Intensity Interactions Shrubs Nitrógeno Precipitación Atmosférica Suelo Tierras de Pastos Zona Semiárida Factores Abióticos Disponibilidad del Agua Intensidad de Pastoreo Interacciones Santa Cruz (Argentina) Arbustos PEBANPA Network Tussock Short grasses Red PEBANPA Región Patagónica Pasto Pastos Cortos Nitrogen (N) cycling in rangeland soils could potentially be controlled by water supply, stocking rates, or a range of other variables, such as ecosystem N stocks. To gauge the relative importance and elucidate possible interactions among these factors, we measured many abiotic variables to identify first-order controls of δ15N for Patagonia’s rangeland soils under contrasting historical grazing intensities. The results showed that δ15N values declined as water availability increased. The effects of precipitation and stocking rate on soil δ15N values were additive, and the effect of precipitation far outweighed the effects of grazing pressure. The soil N stock was a weak predictive variable for modeling variation in δ15N of the soil. Earlier assumptions about an inflection point for N cycling and δ15N values related to aridity were not confirmed. We conclude that variation in water availability drives variation in δ15N values irrespective of grazing intensity. We also conclude that meaningful interpretation of δ15N in soil will require a better mechanistic understanding of the interactions between water and N in the vadose zone than we currently possess. EEA Santa Cruz 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: Duarte Guardia, Sandra. Universidad Nacional de la Patagonia Austral; Argentina. Fil: Duarte Guardia, Sandra. Instituto Nacional de Innovación Agraria (INIA). Laboratorio Nacional de Suelos, Aguas y Foliares-LABSAF; Perú. Fil: Amelung, Wulf. University of Bonn. Institute of Crop Science and Resource Conservation (INRES). Soil Science and Soil Ecology; Alemania Fil: Ladd, Brenton. Universidad Científica del Sur. Escuela de Agroforestería; Perú. 2022-03-09T13:34:43Z 2022-03-09T13:34:43Z 2022-02-11 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/11351 https://acsess.onlinelibrary.wiley.com/doi/full/10.1002/vzj2.20183 Peri P.L.; Duarte-Guardia S.; Amelung W.; Ladd B. (2022) Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands. Vadose Zone Journal 21: e20183. DOI: 10.1002/vzj2.20183. 1539-1663 https://doi.org/10.1002/vzj2.20183 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 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America Vadose Zone Journal 21: e20183. (First published: 11 February 2022) |
| spellingShingle | Nitrogen Precipitation Soil Rangelands Semiarid Zones Abiotic Factors Water Availability Grazing Intensity Interactions Shrubs Nitrógeno Precipitación Atmosférica Suelo Tierras de Pastos Zona Semiárida Factores Abióticos Disponibilidad del Agua Intensidad de Pastoreo Interacciones Santa Cruz (Argentina) Arbustos PEBANPA Network Tussock Short grasses Red PEBANPA Región Patagónica Pasto Pastos Cortos Peri, Pablo Luis Duarte Guardia, Sandra Amelung, Wulf Ladd, Brenton Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands |
| title | Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands |
| title_full | Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands |
| title_fullStr | Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands |
| title_full_unstemmed | Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands |
| title_short | Precipitation is the key determinant of topsoil δ15N values in southern Patagonia’s semiarid rangelands |
| title_sort | precipitation is the key determinant of topsoil δ15n values in southern patagonia s semiarid rangelands |
| topic | Nitrogen Precipitation Soil Rangelands Semiarid Zones Abiotic Factors Water Availability Grazing Intensity Interactions Shrubs Nitrógeno Precipitación Atmosférica Suelo Tierras de Pastos Zona Semiárida Factores Abióticos Disponibilidad del Agua Intensidad de Pastoreo Interacciones Santa Cruz (Argentina) Arbustos PEBANPA Network Tussock Short grasses Red PEBANPA Región Patagónica Pasto Pastos Cortos |
| url | http://hdl.handle.net/20.500.12123/11351 https://acsess.onlinelibrary.wiley.com/doi/full/10.1002/vzj2.20183 https://doi.org/10.1002/vzj2.20183 |
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