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Utah juniper vegetation communities were extracted from state ReGAP and Landfire Exisitng Vegetation (California only). The individual rasters were mosaiced to create a single raster than represent Utah juniper with the NGB ecoregion.
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These data were compiled to help understand how climate change may impact dryland pinyon-juniper ecosystems in coming decades, and how resource management might be able to minimize those impacts. Objective(s) of our study were to model the demographic rates of PJ woodlands to estimate the areas that may decline in the future vs. those that will be stable. We quantified populations growth rates across broad geographic areas, and identified the relative roles of recruitment and mortality in driving potential future changes in population viability in 5 tree species that are major components of these dry forests. We used this demographic model to project pinyon-juniper population stability under future climate conditions,...
Categories: Data; Tags: Arizona, Botany, California, Colorado, Ecology, All tags...
Numerous studies have documented the expansion of woodlands in the Intermountain West; however, few have compared the chronology of expansion for woodlands across different geographic regions or determined the mix and extent of presettlement stands. We evaluated tree age structure and establishment for six woodlands in four ecological provinces in the central and northern Great Basin. Since 1860, the area occupied by piñon and or juniper has increased 125 to 625 percent. The increase of trees was a result of infill into shrub-steppe communities with relatively open low density stands of trees and expansion of piñon and juniper into sagebrush-steppe communities that previously did not support trees. Woodland expansion...
Numerous studies have documented the expansion of woodlands in the Intermountain West; however, few have compared the chronology of expansion for woodlands across different geographic regions or determined the mix and extent of presettlement stands. We evaluated tree age structure and establishment for six woodlands in four ecological provinces in the central and northern Great Basin. Since 1860, the area occupied by pi�on and or juniper has increased 125 to 625 percent. The increase of trees was a result of infill into shrub-steppe communities with relatively open low density stands of trees and expansion of pi�on and juniper into sagebrush-steppe communities that previously did not support trees. Woodland expansion...
Numerous studies have documented the expansion of woodlands in the Intermountain West; however, few have compared the chronology of expansion for woodlands across different geographic regions or determined the mix and extent of presettlement stands. We evaluated tree age structure and establishment for six woodlands in four ecological provinces in the central and northern Great Basin. Since 1860, the area occupied by pi�on and or juniper has increased 125 to 625 percent. The increase of trees was a result of infill into shrub-steppe communities with relatively open low density stands of trees and expansion of pi�on and juniper into sagebrush-steppe communities that previously did not support trees. Woodland expansion...
We analyzed and radiocarbon-dated 205 fossil woodrat middens from 14 sites in central and northern Wyoming and adjacent Utah and Montana to document spatiotemporal patterns of Holocene invasion by Utah juniper (Juniperus osteosperma). Holocene migration into central and northern Wyoming and southern Montana from the south proceeded by a series of long-distance dispersal events, which were paced by climate variability and structured by the geographic distribution and connectivity of suitable habitats on the landscape. The migration of Utah juniper into the region involved multiple long-distance dispersal events, ranging from 30 to 135 km. One of the earliest established populations, on East Pryor Mountain in south...
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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.


    map background search result map search result map Occurrence records and vegetation type data used for species distribution models in the western United States BLM REA NGB 2011 Utah juniper Climate Change Viability in the NGB 2030 BLM REA NGB 2011 Utah juniper  Climate Change Viability in the NGB 2030 BLM REA NGB 2011 Utah juniper Climate Change Current Viability in the NGB BLM REA NGB 2011 Utah Juniper in the NGB Pinyon-juniper basal area, climate and demographics data from National Forest Inventory plots and projected under future density and climate conditions BLM REA NGB 2011 Utah juniper Climate Change Viability in the NGB 2030 BLM REA NGB 2011 Utah juniper  Climate Change Viability in the NGB 2030 BLM REA NGB 2011 Utah juniper Climate Change Current Viability in the NGB BLM REA NGB 2011 Utah Juniper in the NGB Pinyon-juniper basal area, climate and demographics data from National Forest Inventory plots and projected under future density and climate conditions Occurrence records and vegetation type data used for species distribution models in the western United States