Title:

Demography of ancient western juniper (Juniperus occidentalis var. occidentalis) trees on Horse Ridge in central Oregon, USA

Author(s):

Loehman, Rachel A.; Heyerdahl, Emily K.; Pederson, Gregory T.; McWethy, David B.

Publication Year:

2022

How to Cite:

These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Loehman, Rachel A.; Heyerdahl, Emily K.; Pederson, Gregory T.; McWethy, David B. 2022. Demography of ancient western juniper (Juniperus occidentalis var. occidentalis) trees on Horse Ridge in central Oregon, USA. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2022-0031

Abstract:

This data publication contains a dataset of dendrochronologically crossdated western juniper (Juniperus occidentalis var. occidentalis) tree recruitment dates sampled from a grid of 21 plots distributed over 130 hectares on Horse Ridge in central Oregon, USA. Samples were collected in May 2020. The trees recruited between 845 and 1961 CE, but most trees established after the mid 1550s. Data include establishment date information for all trees within the plots that were at least 10 centimeters (cm) in diameter at 30 cm height from the modern ground surface; tallies of unsampled trees within the plots, in other words those that were at least 30 cm in height, but less than 10 cm in diameter; geophysical and plant community plot characteristics; and understory species presence. Also included are four photographs of each plot and one or more photographs of each sampled tree.

Keywords:

dendrochronology; tree rings; tree demography; biota; climatologyMeteorologyAtmosphere; environment; Climate change; Ecological adaptation; Ecology, Ecosystems, & Environment; Landscape ecology; Forest & Plant Health; Climate effects; Inventory, Monitoring, & Analysis; Oregon; Horse Ridge Research Natural Area

Related publications:

• Loehman, Rachel A.; Heyerdahl, Emily K.; Pederson, Gregory T.; McWethy, David B. 2022. Climate and landscape controls on old-growth western juniper demography in the northern Great Basin, USA. Ecosystems. 26(2): 362-382. https://doi.org/10.1007/s10021-022-00762-9 https://www.fs.usda.gov/research/treesearch/65165

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  • RDS-2022-0031_Supplements.zip (3.7 MB; Checksum)
  • RDS-2022-0031_Data.zip (22.19 KB; Checksum)
  • RDS-2022-0031_Plot_Tree_Photos.zip (1.88 GB; Checksum)

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