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In western North America, quaking aspen (Populus tremuloides) is the most common hardwood in montane landscapes. Fire suppression, grazing and wildlife management practices, and climate patterns of the past century are all potential threats to aspen coverage in this region. If aspen-dependent species are losing habitat, this raises concerns about their long-term viability. Though lichens have a rich history as air pollution indicators, we believe that they may also be useful as a metric of community diversity associated with habitat change. We established 47 plots in the Bear River Range of northern Utah and southern Idaho to evaluate the effects of forest succession on epiphytic macrolichen communities. Plots were...
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Delineated two aspen functional types, foothill and mountain slope aspen. Foothill aspen occurs at lower elevations, typically less than 2,621 m, within a matrix of sagebrush and other shrubs. Mountain slope aspen occurs across broad elevations from the toe slope to upper subalpine zones, where it intermixes with conifer species. LANDFIRE Existing Vegetation Types (EVT) includes two aspen EVT Rocky Mountain Aspen Forest and Woodland and Intermountain Basin Aspen and Mixed Conifer Forest and Woodland, which overlapped broadly in elevation and were not sufficient for use in distinguishing aspen functional types. Proximity analysis was used to delineate the two functional types. Because higher elevation aspen typically...
Phellinus tremulae is an important fungal decay agent common to aspen and a critical component to the cavity-nesting previous termbirdnext term complex found in western aspen stands. Little information exists on the conditions that facilitate infection and spread of P. tremulae in aspen forests. I used Forest Inventory and Analysis (FIA) data to explore the relationships of several tree and stand characteristics to the presence and frequency of P. tremulae in aspen measured across several western states of the United States. Results suggest a strong relationship between tree age, tree diameter, and compacted crown ratio with infection frequency in trees while stand purity, canopy cover and stand age had a positive...
Many abiotic and biotic factors affect the health of roadside vegetation, including the application of magnesium chloride (MgCl2) dust suppression products. Three hundred seventy kilometers (230 mi) of forested, shrubland, meadow, rangeland, riparian, and wetland roadside habitats were surveyed along major nonpaved roads in two Colorado counties. Dominant species composition and visible damages of woody roadside vegetation were quantified. The majority (72.3% to 79.3%) of roadside vegetation surveyed was considered healthy (less than 5% damage to crown or stem), depending on slope position from the road. Severely damaged (greater than 50% damage) vegetation ranged from 6.4% to 11.4% of roadside cover, with the most...
The project involves the recordation and management of a large archaeological complex surrounding Chicken Springs. The site has evidence of long term use and appears remain important to Native American tribes as a traditional cultural property at which ceremonies appear to be ongoing. The site has competing uses being along an access corridor to a developing gas field and having extensive recreational and tourism visitation. The project will record the resource and develop a management plan which will enhance the health of the lands in the area while managing increased demand for minerals and recreation. This project would meet the cultural requirements and also provide a management plan that could include consideration...
Use hand crews to reduce conifer competition with aspen in inaccessible areas of upper Red Creek.
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This project will involve prescribed burning 6546 acres (approximately half black) in a mosaic pattern in the Pole Creek area to improve upland plant communities, and aspen stands by removing conifer cover to help sustain aspen habitat by promoting suckering and removing competition by conifers to increase productivity and browse. The project includes a special emphasis on improvement of the age class and diversity of plant communities. Historically, some of this area has been classified as transitional and year long range for mule deer, elk, moose, and antelope. Healthy aspen, mountain shrub, grassland/forb and riparian communities are important parturition and fawn rearing areas for big game. By improving this...
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This map shows the current and near-term status of terrestrial ecosystems, in addition to the input datasets used for the analysis and distribution modeling that were involved in producing these status datasets. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content...
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Aspen 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 aspen with the NGB ecoregion.
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This map shows the current and near-term status of terrestrial ecosystems, in addition to the input datasets used for the analysis and distribution modeling that were involved in producing these status datasets. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content...
Stands of quaking aspen (Populus tremuloides) rank among the most biologically diverse plant communities across the intermountain region of western North America. Marked declines of aspen have occurred in recent decades, likely due to a combination of effects from changes in fire regimes, herbivory, climate (e.g. drought), and interspecific competition with conifer species. However, it is poorly understood how the effects of these factors are manifested at a landscape scale over decadal time periods. Analysis of field data combined with topographic information collected across the 500,000 ha Owyhee Plateau in southwestern Idaho revealed that aspen in the area occur in three different biophysical settings; First,...
In 1998, Mexican gray wolves (Canis lupus baileyi) were introduced into the Blue Range Wolf Recovery Area (BRWRA) that spans adjacent portions of Arizona andNewMexico. In 2009 we selected three mixedconifer sites on the Apache National Forest, within the BRWRA of east-central Arizona, to characterize long-term age structure of aspen (Populus tremuloides) and to check for the possible occurrence of a tri-trophic cascade involving Mexican wolves, Rocky Mountain elk (Cervus elaphus nelsoni), and aspen. These mixed-conifer sites included (a) a refugium site, (b) an old-growth site, and (c) a site thinned in 1991?1992. The refugium site was inaccessible to elk and cattle whereas the old-growth and thinned sites were...
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Aim The recent concern that quaking aspen (Populus tremuloides Michx.) has been declining in parts of western North America due to fire suppression is largely based on trends during the latter part of the 20th century. The aim of the current study was to compare the extent of aspen in the modern landscape with its extent in the late 19th century prior to fire suppression, and to assess the effects of elevation, late-19th century fires, and pre-fire forest composition on the successional status of aspen. Location North-west Colorado, USA. Methods We used a georeferenced 1898 map and modern maps to examine trends in aspen dominance since the late 19th century in a 348,586 ha area of White River and Routt National...
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This data set contains imagery from the National Agriculture Imagery Program (NAIP). The NAIP program is administered by USDA FSA and has been established to support two main FSA strategic goals centered on agricultural production. These are, increase stewardship of America's natural resources while enhancing the environment, and to ensure commodities are procured and distributed effectively and efficiently to increase food security. The NAIP program supports these goals by acquiring and providing ortho imagery that has been collected during the agricultural growing season in the U.S. The NAIP ortho imagery is tailored to meet FSA requirements and is a fundamental tool used to support FSA farm and conservation programs....
FY2011Aspen populations are in decline across western North America due to altered fire regimes, herbivory, drought, pathogens, and competition with conifers. Aspen stands typically support higher avian biodiversity than surrounding habitats, and maintaining current distributions of several avian species is likely tied to persistence of aspen on the landscape. We are examining effects of climate change on aspen and associated avian communities in isolated mountain ranges of the northern Great Basin, by coupling empirical models of avian-habitat relationships with spatially-explicit landscape simulations of vegetation and disturbance dynamics (using LANDIS-II) under various climate change scenarios. We are addressing...
This data set contains imagery from the National Agriculture Imagery Program (NAIP). The NAIP program is administered by USDA FSA and has been established to support two main FSA strategic goals centered on agricultural production. These are, increase stewardship of America's natural resources while enhancing the environment, and to ensure commodities are procured and distributed effectively and efficiently to increase food security. The NAIP program supports these goals by acquiring and providing ortho imagery that has been collected during the agricultural growing season in the U.S. The NAIP ortho imagery is tailored to meet FSA requirements and is a fundamental tool used to support FSA farm and conservation programs....
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These data were extracted from the CALVEG Existing Vegetation tiles, using the CWHR type, Hardwood (including Montane Hardwood Conifer, Montane Hardwood, Aspen) and clipped to the Central Sierra Nevada Zone for the CA LCC.These CALVEG Existing Vegetation tiles have been crosswalked to other classification systems, including the California Wildlife Habitat Relationship System (CWHR).The CWHR habitat classification scheme has been developed to support the CWHR System, a wildlife information system and predictive model for California's regularly-occurring birds, mammals, reptiles and amphibians. When first published in 1988, the classification scheme had 53 habitats. These habitats — except the non-vegetated Barren...
Tags: Aspen, Hardwood
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Aspen was analyzed against Disease Change Agents by computing the euclidean distance from sudden aspen decline stands. The resulting dataset was used in the intactness calculation.
map background search result map search result map Pole Creek Prescribed Burn Influences of infrequent fire, elevation and pre-fire vegetation on the persistence of quaking aspen (Populus tremuloides Michx.) in the Flat Tops area, Colorado, USA Chicken Springs Archeology Pine Mountain/Upper Red Creek Aspen Restoration CWHR Habitat Type - Hardwood, Central Sierra Nevada Zones FSA 10:1 NAIP Imagery m_3910650_nw_13_1_20150910_20151102 3.75 x 3.75 minute JPEG2000 from The National Map FSA 10:1 NAIP Imagery m_3707858_nw_17_1_20160620_20160928 3.75 x 3.75 minute JPEG2000 from The National Map Quantifying vulnerability of quaking aspen woodlands and associate bird communities to global climate change in the northern Great Basin USGS 1:62500-scale Quadrangle for Aspen, CO 1893 BLM REA NGB 2011 Aspen in the NGB BLM REA NGB 2011 Aspen Distance to Sudden Aspen Decline BLM REA NGB 2011 Aspen Climate Change Viability in the NGB 2060 BLM REA WYB 2011 Ch15 Aspen BLM REA CBR 2010 Terrestrial Ecosystems Status - Inter-Mountain Basins Aspen Mixed Conifer Forest Woodland BLM REA CBR 2010 Terrestrial Ecosystems Status - Rocky Mountain Aspen Forest Woodland FSA 10:1 NAIP Imagery m_3910650_nw_13_1_20150910_20151102 3.75 x 3.75 minute JPEG2000 from The National Map FSA 10:1 NAIP Imagery m_3707858_nw_17_1_20160620_20160928 3.75 x 3.75 minute JPEG2000 from The National Map USGS 1:62500-scale Quadrangle for Aspen, CO 1893 Influences of infrequent fire, elevation and pre-fire vegetation on the persistence of quaking aspen (Populus tremuloides Michx.) in the Flat Tops area, Colorado, USA CWHR Habitat Type - Hardwood, Central Sierra Nevada Zones Quantifying vulnerability of quaking aspen woodlands and associate bird communities to global climate change in the northern Great Basin BLM REA NGB 2011 Aspen Climate Change Viability in the NGB 2060 BLM REA NGB 2011 Aspen in the NGB BLM REA NGB 2011 Aspen Distance to Sudden Aspen Decline BLM REA WYB 2011 Ch15 Aspen BLM REA CBR 2010 Terrestrial Ecosystems Status - Inter-Mountain Basins Aspen Mixed Conifer Forest Woodland BLM REA CBR 2010 Terrestrial Ecosystems Status - Rocky Mountain Aspen Forest Woodland