CHLSOC: the Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

Pfeiffer, Marco; Padarian, José; Osorio, Rodrigo; Bustamante, Nelson; Olmedo, Guillermo Federico; Guevara, Mário; Aburto, Felipe; Albornoz, Francisco; Antilén, Mónica; Araya, Elías; Arellano, Eduardo C.; Barret, Maialen; Barrera, Juan A.; Boeckx, Pascal; Briceño, Margarita; Bunning, Sally; Cabrol, Léa; Casanova, Manuel; Cornejo, Pablo; Corradini, Fabio; Curaqueo, Gustavo; Doetterl, Sebastian; Durán, Paola; Escudey, Mauricio; Espinoza, Angelina; Francke, Samuel; Fuentes, Juan Pablo; Fuentes, Marcel; Gajardo, Gonzalo; Garcı́a, R.; Gallaud, Audrey; Galleguillos, Mauricio; Gómez, Andrés González; Hidalgo, Marcela; Ivelic-Sáez, Jorge; Mashalaba, Lwando; Matus, Francisco; Meza, Francisco; Mora, María de la Luz; Mora, Jorge Andrés Tovar; Muñoz, Cristina García; Norambuena, Pablo; Olivera, Carolina; Ovalle, Carlos; Panichini, Marcelo; Pauchard, Aníbal; Pérez-Quezada, Jorge F.; Radic, Sergio; Ramírez, José Naranjo; Riveras, Nicolás; Ruiz, Germán Ramos; Salazar, Osvaldo; Salgado, Iván; Seguel, Óscar; Sepúlveda, Milena; Sierra, Carlos; Tapia, Yasna; Tapia, Francisco Herrera; Toledo, Balfredo; Torrico, José Miguel; Valle, Susana Raquel Morcelle del; Vargas, Ronald; Wolff, Michael; Zagal, Erick

doi:10.5194/essd-12-457-2020

Cited by 19 publications

(13 citation statements)

References 58 publications

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“…SOC content declined with increasing aridity along the SN-gradient (Figure 2) which is in agreement with field observations of the loss of above-ground vegetation and with other studies sampling in South-North direction (Crits-Christoph et al, 2013). SOC contents coincide to the findings of other studies (Connon et al, 2007;Crits-Christoph et al, 2013;Ewing et al, 2008;Pfeiffer et al, 2020) and lie well below concentrations of other deserts, like the Northern Negev desert (minimum of 2.3 g kg −1 in autumn in the driest season; Amundson, 2001; Barness et al, 2009). We suggest the decline to be a direct result of the decrease of water availability as water drives primary production (Lawlor, 2002).…”

Section: Parameters Affected By Ariditysupporting

confidence: 89%

Gradient Studies Reveal the True Drivers of Extreme Life in the Atacama Desert

et al. 2022

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Studies of hyper‐arid sites contribute to our understanding on how life adapted to extreme conditions. They are often used to further deduce implications for extraterrestrial biology by the so‐called analogue site‐approach. The Atacama Desert, Chile, is one of the most prominent analogue sites despite its neighboring productive ecosystems due to its hyper‐aridity and geochemical features resembling Martian environments. We hypothesize that many drivers of extremophile life in analogue sites are only mistakenly attributed to aridity alone, thus obscuring a clear view of the far more complex process interactions originating in nearby earthly ecosystems. To test this, we investigated 54 soil profiles up to 60 cm of soil depth along of four transects in the Atacama Desert, either running parallel (S‐N) or perpendicular (W‐E) to the Andes. Our objective was to reveal the processes controlling the formation of soil organic carbon (SOC) as the most reliable proxy for microbial life in order to understand the boundary conditions of life in extreme habitats. Further, we aimed at identifying analogue sites as uncompromised as possible by external influences of for example, vegetated or marine ecosystems. We found a mixture of influences driving habitable conditions on gradients perpendicular to the Andes, for example, fog and precipitation scavenging caused by altitudinal variations and differing proximity to the Pacific Ocean, while transects parallel to the Andes were much less biased by external factors. Our results show that studies on life under extreme conditions should clarify the explanatory strength of the investigated factors by a gradient study approach.

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Section: Parameters Affected By Ariditysupporting

confidence: 89%

Gradient Studies Reveal the True Drivers of Extreme Life in the Atacama Desert

et al. 2022

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“…The soil information used in this study was derived from several sources, including the World Soil Information Service (WoSIS) ( Batjes, Ribeiro & Van Oostrum, 2020 ), the Chilean Soil Organic Carbon database (CHLSOC) ( Pfeiffer et al, 2020 ), and the data described in Stockmann et al (2015) . Since this is a collation of mostly legacy data, and soil analytical methods change in time, part of the SOC data ( Stockmann et al, 2015 ) were harmonised to a common measuring method using pedotransfer functions ( Skjemstad, Spouncer & Beech, 2000 ).…”

Section: Methodsmentioning

confidence: 99%

Soil carbon sequestration potential in global croplands

Padarian

Minasny

McBratney

et al. 2022

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Improving the amount of organic carbon in soils is an attractive alternative to partially mitigate climate change. However, the amount of carbon that can be potentially added to the soil is still being debated, and there is a lack of information on additional storage potential on global cropland. Soil organic carbon (SOC) sequestration potential is region-specific and conditioned by climate and management but most global estimates use fixed accumulation rates or time frames. In this study, we model SOC storage potential as a function of climate, land cover and soil. We used 83,416 SOC observations from global databases and developed a quantile regression neural network to quantify the SOC variation within soils with similar environmental characteristics. This allows us to identify similar areas that present higher SOC with the difference representing an additional storage potential. We estimated that the topsoils (0–30 cm) of global croplands (1,410 million hectares) hold 83 Pg C. The additional SOC storage potential in the topsoil of global croplands ranges from 29 to 65 Pg C. These values only equate to three to seven years of global emissions, potentially offsetting 35% of agriculture’s 85 Pg historical carbon debt estimate due to conversion from natural ecosystems. As SOC store is temperature-dependent, this potential is likely to reduce by 14% by 2040 due to climate change in a “business as usual” scenario. The results of this article can provide a guide to areas of focus for SOC sequestration, and highlight the environmental cost of agriculture.

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“…Soil organic carbon stock (SOC, Mg C ha −1 ) was estimated for profiles available from the Chilean Soil Organic Carbon (CHLSOC) database (Pfeiffer et al, 2020), as the sum of C content in their horizons (SOC_i):…”

Section: Carbon In Soilmentioning

confidence: 99%

How much carbon is stored in the terrestrial ecosystems of the Chilean Patagonia?

et al. 2023

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We estimated the amount of carbon (C) stored in terrestrial ecosystems of the Chilean Patagonia and the proportion within protected areas. We used existing public databases that provide information on C stocks in biomass and soils. Data were analysed by ecosystem and forest type in the case of native forests. Our results show that some ecosystems have been more extensively studied both for their stocks in biomass and soils (e.g. forests) compared with others (e.g. shrublands). Forests and peatlands store the largest amount of C because of their large stocks per hectare and the large area they cover. The total amount of C stored per unit area varies from 261.7 to 432.8 Mg C ha −1 , depending on the published value used for soil organic C stocks in peatlands, highlighting the need to have more precise estimates of the C stored in this and other ecosystems. The mean stock in national parks (508 Mg C ha −1 ) is almost twice the amount stored in undisturbed forests in the Amazon. State and private protected areas contain 58.9% and 2.1% of the C stock, respectively, playing a key role in protecting ecosystems in this once pristine area.

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CHLSOC: the Chilean Soil Organic Carbon database, a multi-institutional collaborative effort

Cited by 19 publications

References 58 publications

Gradient Studies Reveal the True Drivers of Extreme Life in the Atacama Desert

Gradient Studies Reveal the True Drivers of Extreme Life in the Atacama Desert

Soil carbon sequestration potential in global croplands

How much carbon is stored in the terrestrial ecosystems of the Chilean Patagonia?

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