Articles | Volume 6, issue 1
https://doi.org/10.5194/soil-6-53-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-6-53-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Original research article
| Highlight paper
| 
11 Feb 2020
Original research article | Highlight paper |
| 11 Feb 2020
| 11 Feb 2020
Variations in soil chemical and physical properties explain basin-wide Amazon forest soil carbon concentrations
Carlos Alberto Quesada
CORRESPONDING AUTHOR
Instituto Nacional de Pesquisas da Amazônia, Manaus, Cx. Postal
2223 – CEP 69080-971, Brazil
Claudia Paz
Instituto Nacional de Pesquisas da Amazônia, Manaus, Cx. Postal
2223 – CEP 69080-971, Brazil
Universidade Estadual Paulista, Departamento de Ecologia, CEP
15506-900, Rio Claro, São Paulo, Brazil
Erick Oblitas Mendoza
Instituto Nacional de Pesquisas da Amazônia, Manaus, Cx. Postal
2223 – CEP 69080-971, Brazil
Oliver Lawrence Phillips
School of Geography, University of Leeds, LS2 9JT, UK
Gustavo Saiz
Department of Life Sciences, Imperial College London, Silwood Park
Campus, Buckhurst Road, Ascot, Berkshire SL5 7PY, UK
Department of Environmental Chemistry, Faculty of Sciences,
Universidad Católica de la Santísima Concepción,
Concepción, Chile
Jon Lloyd
Department of Life Sciences, Imperial College London, Silwood Park
Campus, Buckhurst Road, Ascot, Berkshire SL5 7PY, UK
School of Tropical and Marine Sciences and Centre for Terrestrial
Environmental and Sustainability Sciences, James Cook University, Cairns,
4870, Queensland, Australia
Universidade de São Paulo, Faculdade de Filosofia Ciências e
Letras de Ribeirão Preto, Av Bandeirantes, 3900, CEP 14040-901, Bairro
Monte Alegre , Ribeirão Preto, São Paulo, Brazil
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Geosci. Model Dev., 15, 5241–5269, https://doi.org/10.5194/gmd-15-5241-2022, https://doi.org/10.5194/gmd-15-5241-2022, 2022
Short summary
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In tropical ecosystems, the availability of rock-derived elements such as P can be very low. Thus, without a representation of P cycling, tropical forest responses to rising atmospheric CO2 conditions in areas such as Amazonia remain highly uncertain. We introduced P dynamics and its interactions with the N and P cycles into the JULES model. Our results highlight the potential for high P limitation and therefore lower CO2 fertilization capacity in the Amazon forest with low-fertility soils.
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Short summary
Short summary
The MODIS Vegetation Continuous Fields (VCF) product underestimates tree cover compared to field data and could be underestimating tree cover significantly across the tropics. VCF is used to represent land cover or validate model performance in many land surface and global vegetation models and to train finer-scaled Earth observation products. Because underestimation in VCF may render it unsuitable for training data and bias model predictions, it should be calibrated before use in the tropics.
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Short summary
Amazon soils hold as much carbon (C) as is contained in the vegetation. In this work we sampled soils across 8 different Amazonian countries to try to understand which soil properties control current Amazonian soil C concentrations. We confirm previous knowledge that highly developed soils hold C through clay content interactions but also show a previously unreported mechanism of soil C stabilization in the younger Amazonian soil types which hold C through aluminium organic matter interactions.
Amazon soils hold as much carbon (C) as is contained in the vegetation. In this work we sampled...
