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Modelling Soil Carbon Content in South Patagonia and Evaluating Changes According to Climate, Vegetation, Desertification and Grazing

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  • Pablo Luis Peri

    (Instituto Nacional de Tecnología Agropecuaria (INTA); 9400 Río Gallegos, Argentina
    Universidad Nacional de la Patagonia Austral (UNPA)-CONICET, 9400 Río Gallegos, Argentina)

  • Yamina Micaela Rosas

    (Laboratorio de Recursos Agroforestales, Centro Austral de Investigaciones Científicas (CADIC CONICET); 9410 Ushuaia, Argentina)

  • Brenton Ladd

    (School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney 2052, Australia
    Escuela de Agroforestería, Universidad Científica del Sur; Lima 33, Perú)

  • Santiago Toledo

    (Universidad Nacional de la Patagonia Austral (UNPA)-CONICET, 9400 Río Gallegos, Argentina)

  • Romina Gisele Lasagno

    (Instituto Nacional de Tecnología Agropecuaria (INTA); 9400 Río Gallegos, Argentina)

  • Guillermo Martínez Pastur

    (Laboratorio de Recursos Agroforestales, Centro Austral de Investigaciones Científicas (CADIC CONICET); 9410 Ushuaia, Argentina)

Abstract

In Southern Patagonia, a long-term monitoring network has been established to assess bio-indicators as an early warning of environmental changes due to climate change and human activities. Soil organic carbon (SOC) content in rangelands provides a range of important ecosystem services and supports the capacity of the land to sustain plant and animal productivity. The objectives in this study were to model SOC (30 cm) stocks at a regional scale using climatic, topographic and vegetation variables, and to establish a baseline that can be used as an indicator of rangeland condition. For modelling, we used a stepwise multiple regression to identify variables that explain SOC variation at the landscape scale. With the SOC model, we obtained a SOC map for the entire Santa Cruz province, where the variables derived from the multiple linear regression models were integrated into a geographic information system (GIS). SOC stock to 30 cm ranged from 1.38 to 32.63 kg C m −2 . The fitted model explained 76.4% of SOC variation using as independent variables isothermality, precipitation seasonality and vegetation cover expressed as a normalized difference vegetation index. The SOC map discriminated in three categories (low, medium, high) determined patterns among environmental and land use variables. For example, SOC decreased with desertification due to erosion processes. The understanding and mapping of SOC in Patagonia contributes as a bridge across main issues such as climate change, desertification and biodiversity conservation.

Suggested Citation

  • Pablo Luis Peri & Yamina Micaela Rosas & Brenton Ladd & Santiago Toledo & Romina Gisele Lasagno & Guillermo Martínez Pastur, 2018. "Modelling Soil Carbon Content in South Patagonia and Evaluating Changes According to Climate, Vegetation, Desertification and Grazing," Sustainability, MDPI, vol. 10(2), pages 1-14, February.
  • Handle: RePEc:gam:jsusta:v:10:y:2018:i:2:p:438-:d:130784
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    References listed on IDEAS

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    1. Eric A. Davidson & Susan E. Trumbore & Ronald Amundson, 2000. "Soil warming and organic carbon content," Nature, Nature, vol. 408(6814), pages 789-790, December.
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    Cited by:

    1. Vito Imbrenda & Rosa Coluzzi & Valerio Di Stefano & Gianluca Egidi & Luca Salvati & Caterina Samela & Tiziana Simoniello & Maria Lanfredi, 2022. "Modeling Spatio-Temporal Divergence in Land Vulnerability to Desertification with Local Regressions," Sustainability, MDPI, vol. 14(17), pages 1-20, August.
    2. Pablo L. Peri & Yamina M. Rosas & Brenton Ladd & Ricardo Díaz-Delgado & Guillermo Martínez Pastur, 2020. "Carbon Footprint of Lamb and Wool Production at Farm Gate and the Regional Scale in Southern Patagonia," Sustainability, MDPI, vol. 12(8), pages 1-26, April.
    3. Tiago G. Morais & Ricardo F. M. Teixeira & Nuno R. Rodrigues & Tiago Domingos, 2018. "Characterizing Livestock Production in Portuguese Sown Rainfed Grasslands: Applying the Inverse Approach to a Process-Based Model," Sustainability, MDPI, vol. 10(12), pages 1-21, November.
    4. Pablo L. Peri & Yamina M. Rosas & Guillermo Martínez Pastur, 2022. "Human Appropriation of Net Primary Production Related to Livestock Provisioning Ecosystem Services in Southern Patagonia," Sustainability, MDPI, vol. 14(13), pages 1-12, June.
    5. Pablo Luis Peri & Yamina M. Rosas & Emilio Rivera & Guillermo Martínez Pastur, 2021. "Lamb and Wool Provisioning Ecosystem Services in Southern Patagonia," Sustainability, MDPI, vol. 13(15), pages 1-15, July.
    6. Pablo L. Peri & Yamina M. Rosas & Brenton Ladd & Santiago Toledo & Romina G. Lasagno & Guillermo Martínez Pastur, 2019. "Modeling Soil Nitrogen Content in South Patagonia across a Climate Gradient, Vegetation Type, and Grazing," Sustainability, MDPI, vol. 11(9), pages 1-15, May.
    7. Guillermo Martínez Pastur & Marie-Claire Aravena Acuña & Jimena E. Chaves & Juan M. Cellini & Eduarda M. O. Silveira & Julián Rodriguez-Souilla & Axel von Müller & Ludmila La Manna & María V. Lencinas, 2023. "Nitrogenous and Phosphorus Soil Contents in Tierra del Fuego Forests: Relationships with Soil Organic Carbon, Climate, Vegetation and Landscape Metrics," Land, MDPI, vol. 12(5), pages 1-18, April.

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