California Spotted Owl Occupancy On Mixed-Ownership Lands In the Sierra Nevada of California, 2012 Through 2016
Since the 1970s, California Spotted Owls (Strix occidentalis occidentalis [CSO]) have been documented on private forest lands currently owned by Sierra Pacific Industries (SPI) in the Sierra Nevada of California. In 2012, SPI began an occupancy study on a portion of the CSO population known to occur...
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| Veröffentlicht in: | Northwestern naturalist (Olympia, Wash.) Wash.), 2017-10, Vol.98 (2), p.101-116 |
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| creator | Roberts, Kevin N Hall, William E Shufelberger, Amanda J Reno, Matthew A Schroeder, Michelle M |
| description | Since the 1970s, California Spotted Owls (Strix occidentalis occidentalis [CSO]) have been documented on private forest lands currently owned by Sierra Pacific Industries (SPI) in the Sierra Nevada of California. In 2012, SPI began an occupancy study on a portion of the CSO population known to occur on or near its managed forests in 5 watershed study areas averaging 110 km2 each. These watersheds occur from the southern end of the Cascade Range to just north of Yosemite National Park. We concluded that 57 historical CSO sites existed in these areas at the beginning of the study. During 2012 through 2016, the survey effort increased the total number of known CSO sites in the study areas to 65. During the same period, the yearly occupancy of the CSO sites within the study areas ranged from 70 to 86%, with 98% of the sites occupied during at least 1 y. Crude densities during the study period were calculated to be 0.117 CSO-occupied sites km−2. Compared to other studies in the Sierra Nevada, the CSO populations on our 5-yr study areas showed relatively high occupancy rates and a wide range of crude densities. |
| doi_str_mv | 10.1898/NWN15-23.1 |
| format | Article |
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| identifier | ISSN: 1051-1733 |
| ispartof | Northwestern naturalist (Olympia, Wash.), 2017-10, Vol.98 (2), p.101-116 |
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| language | eng |
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| source | Jstor Complete Legacy |
| subjects | Bird populations California Spotted Owl detection probability Distribution Endangered & extinct species Forest management Forests Historic buildings & sites Historic sites National parks occupancy Owls Population studies Sierra Nevada Strigidae Strix occidentalis Strix occidentalis occidentalis Watersheds Wildlife conservation |
| title | California Spotted Owl Occupancy On Mixed-Ownership Lands In the Sierra Nevada of California, 2012 Through 2016 |
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