Evidence map›Paper›PMID 20018740›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2009

Ancient DNA reveals late survival of mammoth and horse in interior Alaska.

James Haile, Duane G Froese, Ross D E Macphee, Richard G Roberts, Lee J Arnold, Alberto V Reyes, Morten Rasmussen, Rasmus Nielsen, Barry W Brook, Simon Robinson and 8 more

Abstract readHistorical Article
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers.

0numbers the graph read from it
0cells of the map it votes in
60citing 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

60 citing papers in PubMed.

  1. Article
  2. Article
  3. Rewilded horses in European nature conservation - a genetics, ethics, and welfare perspective.Biological reviews of the Cambridge Philosophical Society · 2025
    Review
  4. Article
  5. Review
  6. Article
  7. Paleoecology of extinct species.BMC ecology and evolution · 2023
    Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Microstratigraphic preservation of ancient faunal and hominin DNA in Pleistocene cave sediments.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  14. Late Pleistocene shrub expansion preceded megafauna turnover and extinctions in eastern Beringia.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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

18 authors.

James HaileCentre for GeoGenetics, University of Copenhagen, Copenhagen 2100, Denmark.
Duane G Froese
Ross D E Macphee
Richard G Roberts
Lee J Arnold
Alberto V Reyes
Morten Rasmussen
Rasmus Nielsen
Barry W Brook
Simon Robinson
Martina Demuro
M Thomas P Gilbert
Kasper Munch
Jeremy J Austin
Alan Cooper
Ian Barnes
Per Möller
Eske Willerslev

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Causes of late Quaternary extinctions of large mammals ("megafauna") continue to be debated, especially for continental losses, because spatial and temporal patterns of extinction are poorly known. Accurate latest appearance dates (LADs) for such taxa are critical for interpreting the process of extinction. The extinction of woolly mammoth and horse in northwestern North America is currently placed at 15,000-13,000 calendar years before present (yr BP), based on LADs from dating surveys of macrofossils (bones and teeth). Advantages of using macrofossils to estimate when a species became extinct are offset, however, by the improbability of finding and dating the remains of the last-surviving members of populations that were restricted in numbers or confined to refugia. Here we report an alternative approach to detect 'ghost ranges' of dwindling populations, based on recovery of ancient DNA from perennially frozen and securely dated sediments (sedaDNA). In such contexts, sedaDNA can reveal the molecular presence of species that appear absent in the macrofossil record. We show that woolly mammoth and horse persisted in interior Alaska until at least 10,500 yr BP, several thousands of years later than indicated from macrofossil surveys. These results contradict claims that Holocene survival of mammoths in Beringia was restricted to ecologically isolated high-latitude islands. More importantly, our finding that mammoth and horse overlapped with humans for several millennia in the region where people initially entered the Americas challenges theories that megafaunal extinction occurred within centuries of human arrival or were due to an extraterrestrial impact in the late Pleistocene.

Indexed as

Extinction, BiologicalAlaskaAnimalsDNAFossilsGeologic SedimentsHistory, AncientHorsesHumansMammothsModels, BiologicalDNA

Identifiers

PMID20018740
PMCPMC2795395

What OpenQuestion holds

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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.