Soil organic carbon stocks in native forest of Argentina: a useful surrogate for mitigation and conservation planning under climate variability

Background The nationally determined contribution (NDC) presented by Argentina within the framework of the Paris Agreement is aligned with the decisions made in the context of the United Nations Framework Convention on Climate Change (UNFCCC) on the reduction of emissions derived from deforestation...

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Published in:	Ecological processes Vol. 13; no. 1; pp. 1 - 22
Main Authors:	Peri, Pablo L., Gaitán, Juan, Mastrangelo, Matías, Nosetto, Marcelo, Villagra, Pablo E., Balducci, Ezequiel, Pinazo, Martín, Eclesia, Roxana P., Von Wallis, Alejandra, Villarino, Sebastián, Alaggia, Francisco, Polo, Marina González, Manrique, Silvina, Meglioli, Pablo A., Rodríguez-Souilla, Julián, Mónaco, Martín, Chaves, Jimena E., Medina, Ariel, Gasparri, Ignacio, Arnesi, Eugenio Alvarez, Barral, María Paula, von Müller, Axel, Pahr, Norberto M., Echevarria, Josefina Uribe, Fernández, Pedro, Morsucci, Marina, López, Dardo, Cellini, Juan Manuel, Alvarez, Leandro, Barberis, Ignacio, Colomb, Hernán, La Manna, Ludmila, Barbaro, Sebastián, Blundo, Cecilia, Sirimarco, Ximena, Cavallero, Laura, Zalazar, Gualberto, Pastur, Guillermo Martínez
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Springer Berlin Heidelberg 01-12-2024 Springer Nature B.V SpringerOpen
Subjects:	Annual Annual precipitation Argentina Biodiversity Biodiversity loss Carbon Climate change Climate change mitigation Climate variability Cloud computing Conservation Current Trends in Forestry Research of Latin-America (CONFLAT Congress Deforestation Earth and Environmental Science Ecosystem services Emissions control Environment Forest degradation Forest ecosystems Forest management Forest soils Forests Image enhancement International organizations Kyoto Protocol Land surface temperature Landsat Landsat satellites Mitigation Modelling Native forest Organic carbon Organic soils Paris Agreement Precipitation Probability theory Remote sensing Resilience Satellite imagery Seasonal variations Seasonality Soil organic carbon Soil properties Spatial discrimination Spatial distribution Spatial resolution Stocks Surface temperature Terrestrial ecosystems Variability Vegetation Vegetation index Wildlife conservation Argentina Modelling Native forest Biodiversity Climate change mitigation Soil organic carbon Resilience
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Summary:	Background The nationally determined contribution (NDC) presented by Argentina within the framework of the Paris Agreement is aligned with the decisions made in the context of the United Nations Framework Convention on Climate Change (UNFCCC) on the reduction of emissions derived from deforestation and forest degradation, as well as forest carbon conservation (REDD+). In addition, climate change constitutes one of the greatest threats to forest biodiversity and ecosystem services. However, the soil organic carbon (SOC) stocks of native forests have not been incorporated into the Forest Reference Emission Levels calculations and for conservation planning under climate variability due to a lack of information. The objectives of this study were: (i) to model SOC stocks to 30 cm of native forests at a national scale using climatic, topographic and vegetation as predictor variables, and (ii) to relate SOC stocks with spatial–temporal remotely sensed indices to determine biodiversity conservation concerns due to threats from high inter-annual climate variability. Methods We used 1040 forest soil samples (0–30 cm) to generate spatially explicit estimates of SOC native forests in Argentina at a spatial resolution of approximately 200 m. We selected 52 potential predictive environmental covariates, which represent key factors for the spatial distribution of SOC. All covariate maps were uploaded to the Google Earth Engine cloud-based computing platform for subsequent modelling. To determine the biodiversity threats from high inter-annual climate variability, we employed the spatial–temporal satellite-derived indices based on Enhanced Vegetation Index (EVI) and land surface temperature (LST) images from Landsat imagery. Results SOC model (0–30 cm depth) prediction accounted for 69% of the variation of this soil property across the whole native forest coverage in Argentina. Total mean SOC stock reached 2.81 Pg C (2.71–2.84 Pg C with a probability of 90%) for a total area of 460,790 km 2 , where Chaco forests represented 58.4% of total SOC stored, followed by Andean Patagonian forests (16.7%) and Espinal forests (10.0%). SOC stock model was fitted as a function of regional climate, which greatly influenced forest ecosystems, including precipitation (annual mean precipitation and precipitation of warmest quarter) and temperature (day land surface temperature, seasonality, maximum temperature of warmest month, month of maximum temperature, night land surface temperature, and monthly minimum temperature). Biodiversity was influenced by the SOC levels and the forest regions. Conclusions In the framework of the Kyoto Protocol and REDD+, information derived in the present work from the estimate of SOC in native forests can be incorporated into the annual National Inventory Report of Argentina to assist forest management proposals. It also gives insight into how native forests can be more resilient to reduce the impact of biodiversity loss.
ISSN:	2192-1709 2192-1709
DOI:	10.1186/s13717-023-00474-5