Evidence map›Paper›PMID 31591202›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2019

Ancient Maya wetland fields revealed under tropical forest canopy from laser scanning and multiproxy evidence.

Timothy Beach, Sheryl Luzzadder-Beach, Samantha Krause, Tom Guderjan, Fred Valdez, Juan Carlos Fernandez-Diaz, Sara Eshleman, Colin Doyle

Abstract readHistorical Article
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing 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

11 citing papers in PubMed.

  1. Maya Postclassic persistence in the Birds of Paradise Wetland Fields, Belize.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Modeling the rise and demise of Classic Maya cities: Climate, conflict, and economies of scale.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  3. Article
  4. Article
  5. Mesoamerican urbanism revisited: Environmental change, adaptation, resilience, persistence, and collapse.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  6. Article
  7. Article
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  9. Historical socioecological transformations in the global tropics as an Anthropocene analogue.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  10. Article
  11. Article
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

8 authors.

Timothy BeachDepartment of Geography and the Environment, The University of Texas at Austin, Austin, TX 78712; beacht@austin.utexas.edu.ORCID 0000-0003-0097-7973
Sheryl Luzzadder-BeachDepartment of Geography and the Environment, The University of Texas at Austin, Austin, TX 78712.
Samantha KrauseDepartment of Geography and the Environment, The University of Texas at Austin, Austin, TX 78712.
Tom GuderjanDepartment of Social Sciences, University of Texas at Tyler, Tyler, TX 75799.
Fred ValdezDepartment of Anthropology, The University of Texas at Austin, Austin, TX 78712.
Juan Carlos Fernandez-DiazNational Center for Airborne Laser Mapping, University of Houston, Houston, TX 77204.
Sara EshlemanDepartment of Geography and the Environment, The University of Texas at Austin, Austin, TX 78712.
Colin DoyleDepartment of Geography and the Environment, The University of Texas at Austin, Austin, TX 78712.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We report on a large area of ancient Maya wetland field systems in Belize, Central America, based on airborne lidar survey coupled with multiple proxies and radiocarbon dates that reveal ancient field uses and chronology. The lidar survey indicated four main areas of wetland complexes, including the Birds of Paradise wetland field complex that is five times larger than earlier remote and ground survey had indicated, and revealed a previously unknown wetland field complex that is even larger. The field systems date mainly to the Maya Late and Terminal Classic (∼1,400-1,000 y ago), but with evidence from as early as the Late Preclassic (∼1,800 y ago) and as late as the Early Postclassic (∼900 y ago). Previous study showed that these were polycultural systems that grew typical ancient Maya crops including maize, arrowroot, squash, avocado, and other fruits and harvested fauna. The wetland fields were active at a time of population expansion, landscape alteration, and droughts and could have been adaptations to all of these major shifts in Maya civilization. These wetland-farming systems add to the evidence for early and extensive human impacts on the global tropics. Broader evidence suggests a wide distribution of wetland agroecosystems across the Maya Lowlands and Americas, and we hypothesize the increase of atmospheric carbon dioxide and methane from burning, preparing, and maintaining these field systems contributed to the Early Anthropocene.

Indexed as

AgricultureArchaeologyBelizeCivilizationForestsHistory, AncientHumansLasersPhotometrySoilWetlandsSoilancient Mayalidarwetland agroecosystems

Identifiers

PMID31591202
PMCPMC6815109

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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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.