Evidence map›Paper›PMID 37729404›Full record

ArticleScience advances2023

Intentional creation of carbon-rich dark earth soils in the Amazon.

Morgan J Schmidt, Samuel L Goldberg, Michael Heckenberger, Carlos Fausto, Bruna Franchetto, Jennifer Watling, Helena Lima, Bruno Moraes, Wetherbee B Dorshow, Joshua Toney and 20 more

Abstract read
In one paragraph

Article in Science advances, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

30 authors.

Morgan J SchmidtDepartment of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA.ORCID 0000-0002-9546-4654
Samuel L GoldbergDepartment of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA.ORCID 0000-0001-8215-2400
Michael HeckenbergerDepartment of Anthropology, University of Florida, Gainesville, FL, USA.ORCID 0009-0006-9866-4375
Carlos FaustoNational Museum/ Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.ORCID 0000-0002-0617-6643
Bruna FranchettoNational Museum/ Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.ORCID 0000-0001-7158-3838
Jennifer WatlingMuseum of Archaeology and Ethnology, University of São Paulo, São Paulo, SP, Brazil.ORCID 0000-0001-7897-5105
Helena LimaEmilio Goeldi Museum, Belém, PA, Brazil.ORCID 0000-0001-5787-7231
Bruno MoraesPuente Institute, Nederland, CO, USA.ORCID 0000-0001-9561-503X
Wetherbee B DorshowPuente Institute, Nederland, CO, USA.ORCID 0000-0001-9771-2642
Joshua ToneyHenry M. Jackson Foundation, Bethesda, MD, USA.ORCID 0009-0005-3617-0591
Yamalui KuikuroKuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, MT, Brazil.
Kumessi WauraKuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, MT, Brazil.
Huke KuikuroKuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, MT, Brazil.
Taku Wate KuikuroKuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, MT, Brazil.
Takumã KuikuroKuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, MT, Brazil.
Yahila KuikuroKuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, MT, Brazil.
Afukaka KuikuroKuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, MT, Brazil.
Wenceslau TeixeiraEMBRAPA Soils, Rio de Janeiro, RJ, Brazil.ORCID 0000-0002-2010-6078
Bruna RochaFederal University of Western Pará, Santarém, PA, Brazil.ORCID 0000-0003-4250-0946
Vinicius HonoratoFederal University of Western Pará, Santarém, PA, Brazil.ORCID 0000-0002-4176-5451
Hugo TavaresMuseum of Archaeology and Ethnology, University of São Paulo, São Paulo, SP, Brazil.ORCID 0000-0002-8446-7630
Marcos MagalhãesEmilio Goeldi Museum, Belém, PA, Brazil.ORCID 0000-0003-1711-8235
Carlos Augusto BarbosaFederal University of Pará, Belém, PA, Brazil.
João Aires da FonsecaArqueomaquina, Belém, PA, Brazil.ORCID 0000-0002-1316-1183
Kelton MendesTapera - Grupo de Estudos em Arqueologia Amazônica, Brazil.
Luís Reynaldo Ferracciú AlleoniLuiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, SP, Brazil.ORCID 0000-0002-0300-2584
Carlos Eduardo Pellegrino CerriLuiz de Queiroz College of Agriculture, University of São Paulo, Piracicaba, SP, Brazil.ORCID 0000-0002-4374-4056
Manuel Arroyo-KalinInstitute of Archaeology, University College London, London, UK.ORCID 0000-0002-9024-8100
Eduardo NevesMuseum of Archaeology and Ethnology, University of São Paulo, São Paulo, SP, Brazil.ORCID 0000-0002-2830-2735
J Taylor PerronDepartment of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA.ORCID 0000-0002-0404-8701

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fertile soil known as Amazonian dark earth is central to the debate over the size and ecological impact of ancient human populations in the Amazon. Dark earth is typically associated with human occupation, but it is uncertain whether it was created intentionally. Dark earth may also be a substantial carbon sink, but its spatial extent and carbon inventory are unknown. We demonstrate spatial and compositional similarities between ancient and modern dark earth and document modern Indigenous practices that enrich soil, which we use to propose a model for the formation of ancient dark earth. This comparison suggests that ancient Amazonians managed soil to improve fertility and increase crop productivity. These practices also sequestered and stored carbon in the soil for centuries, and we show that some ancient sites contain as much carbon as the above-ground rainforest biomass. Our results demonstrate the intentional creation of dark earth and highlight the value of Indigenous knowledge for sustainable rainforest management.

Indexed as

CarbonSoilBiomassCarbon SequestrationCrop ProductionHumansCarbonSoil

Identifiers

PMID37729404
PMCPMC11320335

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.