History of the Arctic Flora in North America
https://data.eol.ucar.edu/dataset/106.438

Summary
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.

Identifiers
 * Local archive identifier: 106.438
 * doi:10.5065/D64T6GH7
   https://doi.org/10.5065/D64T6GH7

Versions
  1.0

Citation
 DeChaine, E., Davis, C. 2013. History of the Arctic Flora in North America.
 Version 1.0. UCAR/NCAR - Earth Observing Laboratory.
 https://doi.org/10.5065/D64T6GH7 Accessed 20 Apr 2024.

Additional citation styles can be generated by entering the DOI
at CrossCite (https://citation.crosscite.org/).

Acknowledgement
In addition to the citation reference and any other acknowledgements,
please acknowledge NCAR/EOL in your publications with text such as:

  Data provided by NCAR/EOL under the sponsorship of
  the National Science Foundation.
  https://data.eol.ucar.edu/

Related projects
 * ARCSS: NSF Arctic System Science
   https://data.eol.ucar.edu/project/ARCSS
 * ACADIS: Advanced Cooperative Arctic Data and Information Service
   https://data.eol.ucar.edu/project/ACADIS

Additional information
 * Frequency: continuous
 * Language: English

Grant Code
0714232

ISO Topic Categories
 * biota

Categories
 * Arctic
 * Biology
 * Vegetation

Platforms
 * Field Surveys

Instruments
 * Visual Observations

Sites
 * Arctic

GCMD Science Keywords
 * EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA > ARCTIC TUNDRA
 * EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION SPECIES
 * EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > TERRESTRIAL ECOSYSTEMS > ALPINE/TUNDRA > ALPINE TUNDRA

Documentation
 * dechaine_readme.pdf [70 KiB]
   https://data.eol.ucar.edu/file/download/4288114984B0/dechaine_readme.pdf

Related links
 * info: ARCSS Data Policy
   https://data.eol.ucar.edu/arctic_projects/arcss/Data_Policy.html
 * homepage: ARCSS EOL Webpage
   https://www.eol.ucar.edu/field_projects/arcss
 * download: NSF Arctic Data Center
   https://doi.org/10.5065/D64T6GH7

Temporal coverage
 * Begin datetime: 2007-01-01 00:00:00 
 * End datetime: 2012-12-31 23:59:59 

Spatial coverage
 * Maximum (North) Latitude: 75.00
 * Minimum (South) Latitude: 35.00
 * Minimum (West) Longitude: -179.00
 * Maximum (East) Longitude: -100.00

Primary contact information
 * pointOfContact: Eric G. DeChaine <eric.dechaine@wwu.edu>
   https://data.eol.ucar.edu/contact/show/1019

Additional contact information
 * author: Eric G. DeChaine <eric.dechaine@wwu.edu>
   https://data.eol.ucar.edu/contact/show/1019
 * author: Charles C. Davis <cdavis@oeb.harvard.edu>
   https://data.eol.ucar.edu/contact/show/1020
 * principalInvestigator: Eric G. DeChaine <eric.dechaine@wwu.edu>
   https://data.eol.ucar.edu/contact/show/1019

Alternate metadata formats
 * DataCite: https://data.eol.ucar.edu/dataset/106.438?format=datacite
 * ISO/TC 211: https://data.eol.ucar.edu/dataset/106.438?format=isotc211