Arid
DOI10.1676/14-021.1
ROOST HABITAT OF MEXICAN SPOTTED OWLS (STRIX OCCIDENTALIS LUCIDA) IN THE CANYONLANDS OF UTAH
Willey, David W.1; Van Riper, Charles, III2
通讯作者Willey, David W.
来源期刊WILSON JOURNAL OF ORNITHOLOGY
ISSN1559-4491
EISSN1938-5447
出版年2015
卷号127期号:4页码:690-696
英文摘要

In large portions of their geographic range, Mexican Spotted Owls (Strix occidentalis lucida) roost in forest-dominated environments, but in some areas the owls use relatively arid rocky canyonlands. We measured habitat characteristics at 133 male roosts (n = 20 males) during 1992-95, and 56 female roosts (n = 13 females) during 1994-95 in canyon environments of southern Utah. Across all years, 44% of Mexican Spotted Owls’ roosts were located in small stands of mixed-conifer forest, 30% in desert scrub vegetation, 16% in pinyon-juniper woodlands, and 10% of roosts were in riparian habitat. Roost sites were located in canyons composed of cliff-forming geologic formations. The width of canyons measured at roosts averaged 68.6 m (8.2 SE), and ranged from 1-500 m. The mean height of cliffs at roost sites was 77 m (10.9 SE) and ranged from 6-411 m. Roosts were located at caves and ledges (46% of all roosts) or in various tree species (54%). Roost height above ground averaged 9.5 m overall (1.1 SE), with mean tree roost height of 3.7 m (0.2 SE), and cliff roost height equal to 17.2 m (2.2 SE). For both males and females, coniferous trees species were used most frequently (64%), primarily Douglas-fir (Pseudotsuga menziesii), white fir (Abies concolor), and Utah juniper; and 36% of roosts occurred in deciduous trees, including big-tooth maple (Acer grandidentatum), boxelder (A. negundo), and Utah serviceberry (Amelanchier uthaensis). Canopy cover of tress at roosts ranged from 44-71%, mean tree height of trees present was 9.5 m and mean diameter of trees was 25.4 cm. Upland habitats that were not used for roosting were warmer, not as steep, possessed fewer caves and ledges, and trees present were of smaller stature than trees present in roost habitat.


英文关键词Mexican Spotted Owl rocky canyons roost habitat Strix occidentalis lucida Utah
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000368340000013
WOS关键词ARIZONA ; NEST ; SELECTION ; SITES
WOS类目Ornithology
WOS研究方向Zoology
来源机构University of Arizona ; United States Geological Survey
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/190842
作者单位1.Montana State Univ, Dept Ecol, Bozeman, MT 59717 USA;
2.Univ Arizona, US Geol Survey, Southwest Biol Sci Ctr, Sonoran Desert Res Stn, Tucson, AZ 85721 USA
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GB/T 7714
Willey, David W.,Van Riper, Charles, III. ROOST HABITAT OF MEXICAN SPOTTED OWLS (STRIX OCCIDENTALIS LUCIDA) IN THE CANYONLANDS OF UTAH[J]. University of Arizona, United States Geological Survey,2015,127(4):690-696.
APA Willey, David W.,&Van Riper, Charles, III.(2015).ROOST HABITAT OF MEXICAN SPOTTED OWLS (STRIX OCCIDENTALIS LUCIDA) IN THE CANYONLANDS OF UTAH.WILSON JOURNAL OF ORNITHOLOGY,127(4),690-696.
MLA Willey, David W.,et al."ROOST HABITAT OF MEXICAN SPOTTED OWLS (STRIX OCCIDENTALIS LUCIDA) IN THE CANYONLANDS OF UTAH".WILSON JOURNAL OF ORNITHOLOGY 127.4(2015):690-696.
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