History of the Arctic Flora in North America

This dataset in an attempt to increase understanding of how climate cycles of the Quaternary (the last 2.6 million years) impacted divergence in Arctic and alpine tundra flora. Specimens were collected in Beringia and the mountains of western North America, focusing on populations existing within (western and eastern Beringia, and the Pacific Northwest and Rocky Mountains, respectively), as well as sites between those refugia. Briefly, DNA was sequenced from chloroplast and nuclear loci for multiple species of tundra plants that inhabited the entire study region. Target species (Campanula species, Kobresia myosuroides, Lloydia serotina, Pinguicula vulgaris, Poa alpina, Rhodiola species, and Saxifraga species) were phylogenetically diverse and displayed a range of dispersal abilities, making them excellent candidates for evaluating general history of the tundra. Those genetic data make up this Arctic Flora dataset. From the genetic sequence data, gene trees are being reconstructed and used to estimate the patterns and timing of divergence, test which geologic and climatic events most impacted divergence, and infer how the process of genetic divergence differed between Arctic and alpine tundra refugia.

The data is archived in nexus files - the standard format for aligned sequence data ready to be used in a phylogenetic analysis. The files are separated by taxon and genetic locus within a given taxon. The nexus format provides details on the data type (DNA), number of samples, and length of sequence. Within a file, all the sequences are aligned but not interleaved, such that the 'sample name' is followed by the entire sequence for that sample. All the specimens that were collected are archived and publicly accessible in the Western Washington University Herbarium.

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Temporal Range

  • Begin:  2007-01-01T00:00:00Z
    End:  2012-12-31T23:59:59Z

Keywords

Resource Type dataset
Temporal Range Begin 2007-01-01T00:00:00Z
Temporal Range End 2012-12-31T23:59:59Z
Temporal Resolution N/A
Bounding Box North Lat 75.00000
Bounding Box South Lat 35.00000
Bounding Box West Long -179.00000
Bounding Box East Long -100.00000
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Documentation #1 : dechaine_readme.pdf

Additional Information N/A
Resource Format ZIP: PKZIP (application/zip)
Standardized Resource Format Archive
Asset Size 1 MB
Legal Constraints

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Access Constraints none
Software Implementation Language N/A

Resource Support Name EOL Data Support
Resource Support Email datahelp@eol.ucar.edu
Resource Support Organization UCAR/NCAR - Earth Observing Laboratory
Distributor UCAR/NCAR - Earth Observing Laboratory
Metadata Contact Name EOL Data Support
Metadata Contact Email datahelp@eol.ucar.edu
Metadata Contact Organization UCAR/NCAR - Earth Observing Laboratory

Author Eric G. DeChaine
Charles C. Davis
Publisher UCAR/NCAR - Earth Observing Laboratory
Publication Date 2013-03-01T16:07:37
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier 106.438
Resource Version 1.0
Topic Category biota
Progress completed
Metadata Date 2024-02-07T22:41:57Z
Metadata Record Identifier edu.ucar.eol::106.438
Metadata Language eng; USA
Suggested Citation Eric G. DeChaine, Charles C. Davis. (2013). History of the Arctic Flora in North America. 1.0. UCAR/NCAR - Earth Observing Laboratory. https://data.eol.ucar.edu//dataset/106.438. Accessed 22 November 2024.

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