Search USGS⌕ Search

SEARCH · Search USGS

Results for “Prairie Naturalist”

Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 91 records · Page 5Linked to original sources
USGS2001

Distributions of roosting sandhill cranes as identified by aerial thermography

We used aerial thermography to determine the location of sandhill crane ( Grus canadensis ) roosting sites during a single night over a 142-km reach of the Platte River, Nebraska. We assessed the influences of human disturbance features, screening of disturbance features by woody vegetation, distance to surrounding cropland of various types and channel width on distribution patterns of sandhill crane roosting sites with the aid of a geographic information system (GIS). We found that roosting sites were farther from bridges and paved roads than random points along the river channel; a visual woody screen mitigated the effect of bridges on locations of roosting sites; and roosting sites were in wider river channels than were observed at random points.

Prairie Naturalist↗
USGS2002

Selection of nesting habitat by sharp-tailed grouse in the Nebraska sandhills

We evaluated nesting habitat selection (disproportionate use compared to availability) by plains sharp-tailed grouse ( Tympanuchus phasianellus jamesi ) on rangelands grazed by cattle ( Bos taurus ) relative to height, density, and heterogeneity of residual herbaceous vegetation remaining from previous growing seasons. Residual cover is critical for nesting sharp-tailed grouse and can be lacking on grazed rangelands. Aerial photography and a geographic information system were used to analyze residual cover height classes and several measures of residual cover heterogeneity in nest (n = 38) and random (n = 38) plots. Height classes corresponded to visual obstruction readings (VORs), the height to which total visual obstruction by vegetation occurs. Analyses were conducted for five spatial scales ranging from 1 to 16 ha to test for scale effects on nesting habitat selection. Sharp-tailed grouse selected nesting habitat with more area in tall (greater than or equal to 4 cm VOR) residual cover than at random sites at all scales, less area in short residual cover (less than 2 cm VOR) at the I-ha scale, and less area in short and medium (2 to 3.9 cm YOR) residual cover at the 2- through 16-ha scales. Selection of shrub habitat containing patches of shrubs was evident only at the 16-ha scale. Patches of tall residual cover were larger in nest plots than in random plots at the 8- and 16-ha scales, and patches of short cover were smaller in nest plots at the I-ha scale. Two scales of pattern defined by mean patch size were detected for overall residual cover, but did not relate to nesting habitat selection.

Nebraska↗
USGS1977

In search of eagles

Review of: Golden eagle country. Richard R. Olendorff. Knopf; 1st edition (1975). 202 p. ISBN: 0394482921.

Prairie Naturalist↗
USGS2003

Purple martins, then and now

Review of: The Purple Martin. Robin Doughty and Rob Fergus. 2002. University of Texas Press, Austin, Texas. 93 pages. $19.95 (cloth).

Prairie Naturalist↗