Filters: Tags: {"scheme":"None"} (X) > partyWithName: Steve Hanser (X)
8 results (13ms)
Filters
Date Range
Extensions Types
Contacts
Categories Tag Types Tags (with Scheme=None) |
Model of habitat utilization by synanthropic avian predators: common ravens (Corvus corax), American crows (Corvus brachyrhynchos), and black-billed magpies (Pica hudsonia). The former two species show increasing nation-wide population trends, and common ravens in the Mojave desert have been shown to have detrimental effects on threatened desert tortoise (Gopherus agassizii) populations. Power lines are used by common ravens and other raptors for nesting and as hunting perches. Linear features such as railroads, primary and secondary roads, and irrigation channels often serve as travel routes for these predators, and expand their movements into previously unused regions. Numbers of synanthropic avian predators increase...
This map was developed to examine multi-scale spatial relationships between percentage of sagebrush and other response variables of interest. A map of sagebrush in the western United States was used as a base layer for a moving window analysis to calculate the percentage of the area classified as sagebrush within a 5-km search radius. Provides 5-km scale proportion of sagebrush land cover for use in examining multi-scale relationships.
Categories: Data;
Types: ArcGIS REST Map Service,
ArcGIS Service Definition,
Downloadable,
Map Service;
Tags: Arizona,
California,
Colorado,
Distribution,
Distribution,
This map depicts the distribution of existing vegetation types contained in the LANDFIRE dataset. All 30-meter EVT grids were resampled to 90-meter grids and merged to create the final product.
Categories: Data;
Types: Downloadable,
Map Service,
Shapefile;
Tags: Arizona,
California,
Colorado,
Distribution,
Ecological System,
Humans have dramatically altered wildlands in the western United States over the past 100 years by using these lands and the resources they provide. Anthropogenic changes to the landscape, such as urban expansion, construction of roads, power lines, and other networks and land uses necessary to maintain human populations influence the number and kinds of plants and wildlife that remain. We developed the map of the human footprint for the western United States from an analysis of 14 landscape structure and anthropogenic features: human habitation, interstate highways, federal and state highways, secondary roads, railroads, irrigation canals, power lines, linear feature densities, agricultural land, campgrounds, highway...
This map depicts the proportion of non-Sage-grouse habitat with 18km of each pixel. The map was produced using a moving window analysis on the Distribution of Non-Sage Grouse Habitat in the Conservation Assessment Area with a search radius of 18km. The product of the moving window was the mean pixel value within the window. This map has a 540m resolution.
Humans have dramatically altered wildlands in the western United States over the past 100 years by using these lands and the resources they provide. Anthropogenic changes to the landscape, such as urban expansion, construction of roads, power lines, and other networks and land uses necessary to maintain human populations influence the number and kinds of plants and wildlife that remain. We developed the map of the human footprint for the western United States from an analysis of 14 landscape structure and anthropogenic features: human habitation, interstate highways, federal and state highways, secondary roads, railroads, irrigation canals, power lines, linear feature densities, agricultural land, campgrounds, highway...
Normalized Difference Vegetation Index (NDVI) for the western United States, from 1989-2002.
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Arizona,
California,
Colorado,
Idaho,
Montana,
Data represents an estimate of oil and natural gas pipeline densities in the intermountain west based on data collected depicting pipeline locations in the study area. These data represent (for the most part) only larger volume, long distance pipelines and not the shorter, lower volume (so-called 'flowlines') associated with specific fluid energy producing sites. HOWEVER, THESE DATA ONLY REPRESENT THAT PORTION OF ACTUAL ON-THE-GROUND AND BURIED PIPELINES THAT HAVE BEEN MAPPED and that we were able to acquire durng th course of our study. THEREFORE, THIS DATASET IS KNOWN TO BE INCOMPLETE. The actual pipline locations are not shown here. Rather this is a grid representing pipeline density in Km/Km^2. DUE TO THE SENSITVE...
|
|