Skip to main content

Occurrence records and vegetation type data used for species distribution models in the western United States

Data for journal manuscript: Life history characteristics may be as important as climate projections for defining range shifts: An example for common tree species in the intermountain western US


Publication Date
Time Period


Copeland, S., 2018, Occurrence records and vegetation type data used for species distribution models in the western United States: U.S. Geological Survey data release,


These data are species distribution information assembled for assessing the impacts of land-use barriers, facilitative interactions with other species, and loss of long-distance animal dispersal on predicted species range patterns for four common species in pinyon-juniper woodlands in the western United States. The layers in the data release are initial distribution records of two kinds: point occurrence records and a raster layer for the general vegetation types where the species is a co-dominant, compiled from other sources. Both types of data are the baseline information in species distribution models for the associated publication.


Point of Contact :
John B Bradford
Originator :
Stella M Copeland
Metadata Contact :
Stella M Copeland
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Southwest Biological Science Center
USGS Mission Area :

Attached Files

Click on title to download individual files attached to this item. 2.17 MB application/zip


The purpose of these data are to provide baseline data for a modeling effort for the effects of facilitative interactions, land-use barriers, and loss of long-distance dispersal from animals on species distribution with future climate change. The point occurrence records were used as presence locations for the species distribution models (MaxEnt). The raster layers are lower resolution (900 m) versions of higher resolution (30 m) vegetation layers used to select locations for pseudo-absences within 100 km of the presence locations in models. The raster layers were also used to estimate the initial distribution characteristics such as area occupied and range size used for comparison with projected distributions with climate change. Since some of the vegetation layers where the species was described as co-dominant extended beyond the species accepted geographic range, we truncated the vegetation layer raster to areas within a 100 km buffer of the occurrence records for that species and then used the result as map of initial distribution (see Figure 1 in the Larger Work Citation).


The author of these data request that data users contact them regarding intended use and to assist with understanding limitations and interpretation. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.

Additional Information


Type Scheme Key
DOI doi:10.5066/P99NEI4E

Item Actions

View Item as ...

Save Item as ...

View Item...