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Cited by 28

The DOI matches its Crossref record; 57 of the 57 references it cites were found in a registry or an index.

The southern coastal Beringian land bridge: cryptic refugium or pseudorefugium for woody plants during the Last Glacial Maximum?

Wang, Yue, Heintzman, Peter D., Newsom, Lee, Bigelow, Nancy H., Wooller, Matthew J., Shapiro, Beth, Williams, John W.·2017·Journal of Biogeography
DOI 10.1111/jbi.13010
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Abstract

Aim: The Bering Land Bridge (BLB) connected Asia and North America during glacial periods, supported a diverse ecosystem of now‐vanished megafauna, and is a proposed glacial refugium. This study tests whether southern coastal Beringia was a refugium for woody taxa during the Last Glacial Maximum (LGM) and hypotheses about habitats available on the BLB before and after megafaunal extinction. Location: St. Paul Island, Alaska. Methods: We analysed sediment cores from the Lake Hill, with a new age model anchored by 18 radiocarbon dates and multiple palaeoecological indicators (sedimentary ancient DNA [seda DNA], macrobotanical fossils, and pollen) for the presence/absence of four woody genera: Picea, Betula, Alnus and Salix. We reconstructed vegetation history and compare St. Paul tundra composition to mainland counterparts. Results: St. Paul has been continuously occupied by graminoid‐forb tundra with prostrate shrubs (Salix, Ericaceae) since 18,000 years before present (yr bp). Fossil pollen of Picea, Pinus, Betula and Alnus is present in the Lake Hill sediments at low relative abundances and accumulation rates, consistent with long‐distance transport. Macrobotanical fossils and seda DNA analyses do not support Picea, Betula and Alnus presence. The St. Paul modern and fossil pollen assemblages are compositionally unlike mainland counterparts, but most closely resemble Arctic herbaceous tundra. Stratigraphically constrained cluster analysis indicates no major change in the vegetation after woolly mammoth extinction at 5600 yr bp, although Poaceae, Cyperaceae, Equisetum and forb abundances increase. Main conclusions: This study strongly indicates that St. Paul and, by implication, southern coastal Beringia were not refugia for woody taxa during the LGM. The persistence of prostrate shrub‐graminoid tundra supports interpretations that herbaceous tundra prevailed on southern Beringia during the LGM, whilst not ruling out the possibility of mesic shrub tundra in the interior. This herbaceous tundra supported an island refugium for woolly mammoth for 8000 years, showing no major vegetation composition changes after extinction.

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Crossref · 10.1111/jbi.13010

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Citations

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Research works printed but not linked: 1

  1. Anderson J.R., 1976, A land use and land cover classification system for use with remote sensor data (Vol. 964)

Cited by

See all 28

Metadata

Authors
Wang, Y., Heintzman, P. D., Newsom, L., Bigelow, N. H., Wooller, M. J., Shapiro, B., & Williams, J. W.
Affiliations
  • Department of Geography University of Wisconsin‐Madison Madison WI 53706 USA
  • Department of Ecology and Evolutionary Biology University of California Santa Cruz Santa Cruz CA 95064 USA
  • Department of Anthropology The Pennsylvania State University University Park PA 16802 USA
  • Alaska Quaternary Center University of Alaska Fairbanks Fairbanks AK 99775 USA
  • Alaska Stable Isotope Facility Water and Environmental Research Center Institute of Northern Engineering University of Alaska Fairbanks Fairbanks AK 99775 USA
ORCID
Wang, Yue
Venue
Journal of Biogeography
Publisher
Wiley
Published
2017-04-17
Volume
44
Issue
7
Pages
1559-1571
ISSN
  • 0305-0270
  • 1365-2699
DOI
10.1111/jbi.13010
Cited by
28
References
57
Language
en
Licence
Funders
National Science Foundation (PLR‐1203772, PLR‐1203997, PLR‐1204233, PLR‐1203990)

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.