Effects of Military Training Activities on Shrub-steppe Raptors in Southwestern Idaho, USA |
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Authors: | ROBERT N LEHMAN KAREN STEENHOF MICHAEL N KOCHERT LESLIE B CARPENTER |
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Institution: | (1) USGS Forest and Rangeland Ecosystem Science Center Snake River Field Station 970 Lusk St. Boise, Idaho 83706, USA , US;(2) Boise State University Raptor Research Center 970 Lusk St. Boise, Idaho 83706, USA, |
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Abstract: | Buteo regalis ), northern harriers (Circus cyaneus), burrowing owls (Athene cunicularia), and short-eared owls (Asio flammeus) inside and outside a military training site in the Snake River Birds of Prey National Conservation Area, southwestern Idaho.
The Orchard Training Area is used primarily for armored vehicle training and artillery firing by the Idaho Army National Guard.
Relative abundance of nesting pairs inside and outside the training site was not significantly different from 1991 to 1993
but was significantly higher on the training site in 1994 (P ≤ 0.03). Nesting success varied among years but was not significantly different inside and outside the training site (P > 0.26). In 1994, short-eared owl and burrowing owl nests were significantly closer to firing ranges used early in the spring
before owls laid eggs than were random points (P < 0.001). In 1993, distances from occupied burrowing owl nests to firing ranges used early in the year were similar to those
from random points to the same firing ranges (P = 0.16). Military activity contributed to some nesting failures from 1992 to 1994, but some pairs nested successfully near
military activity. |
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Keywords: | : Distribution Military impacts Nesting success Raptors Relative abundance Shrub-steppe |
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