Habitat Characteristics at Den Sites of the Point Arena Mountain Beaver (Aplodontia rufa nigra)

2010 ◽  
Vol 84 (1) ◽  
pp. 119 ◽  
Author(s):  
William J. Zielinski
Keyword(s):  
Habitat Characteristics ◽  
Mountain Beaver ◽  
Aplodontia Rufa

scholarly journals Mountain beaver home ranges, habitat use, and population dynamics in Washington

2007 ◽  
Vol 85 (3) ◽  
pp. 328-337 ◽  
Author(s):  
W.M. Arjo ◽  
R.E. Huenefeld ◽  
D.L. Nolte
Keyword(s):  
Population Density ◽  
Habitat Use ◽  
Woody Debris ◽  
Habitat Characteristics ◽  
Home Ranges ◽  
Limited Information ◽  
Managed Forest ◽  
Forest Sites ◽  
Mountain Beaver ◽  
Aplodontia Rufa

The mountain beaver ( Aplodontia rufa (Rafinesque, 1817)), endemic to western North America, is the only extant member of the family Aplodontidae. Limited information on movements and habitat use throughout the species’ range is available. We radio-collared 41 mountain beavers to determine home ranges, dispersal, habitat use, and population densities on two managed forest sites in coastal Washington. Both sites were recently harvested for timber. The Donovan site (16.6 ha) was treated with herbicide before seedling planting and the Sylvia site (8.9 ha) was not treated. Mountain beaver home ranges (Donovan: 4.18 ± 0.81 ha; Sylvia: 1.39 ± 0.4 ha) were greater than previously reported in the literature (0.02–0.2 ha). Home ranges (P = 0.009) and core use areas (P = 0.05) on the herbicide-treated Donovan site were larger than those observed on the untreated Sylvia site. Mountain beaver population density declined from 2002 (n = 16) to 2003 (n = 8) on the Donovan site, and reinvasion onto the site after removal trapping was low (n = 7). Population density more than doubled on the Sylvia site from 2002 (n = 21) to 2003 (n = 55), and reinvasion was greater (n = 27) than observed at Donovan. In addition, we documented habitat characteristics centered at 9 Donovan and 10 Sylvia nest locations. Sites were similar in most habitat characteristics, but the Sylvia site had more herbaceous forbs, stumps, and woody debris. Our findings suggest that mountain beaver populations and home ranges are affected by availability of forage, such as herbaceous forbs, after herbicide treatment, as well as by availability of woody cover.

scholarly journals A range-wide occupancy estimate and habitat model for the endangered Point Arena mountain beaver (Aplodontia rufa nigra)

2015 ◽  
Vol 96 (2) ◽  
pp. 380-393 ◽  
Author(s):  
William J. Zielinski ◽  
Fredrick V. Schlexer ◽  
Jeffrey R. Dunk ◽  
Matthew J. Lau ◽  
James J. Graham
Keyword(s):  
Habitat Model ◽  
Mountain Beaver ◽  
Aplodontia Rufa

Growth and Weight of the Mountain Beaver, Aplodontia rufa pacifica

1974 ◽  
Vol 55 (2) ◽  
pp. 364-369 ◽  
Author(s):  
B. P. Lovejoy ◽  
H. C. Black
Keyword(s):  
Mountain Beaver ◽  
Aplodontia Rufa

Resource use by unexploited sympatric bobcats and coyotes in Oregon

1986 ◽  
Vol 64 (10) ◽  
pp. 2333-2338 ◽  
Author(s):  
G. W. Witmer ◽  
D. S. deCalesta
Keyword(s):  
Resource Use ◽  
Activity Patterns ◽  
Home Ranges ◽  
Felis Rufus ◽  
Clear Cut ◽  
Use Patterns ◽  
Mountain Beaver ◽  
Forested Areas ◽  
Aplodontia Rufa ◽  
Daily Activity Patterns

Unexploited populations of bobcats (Felis rufus) and coyotes (Canis latrans) were studied in the Elliott State Forest, Douglas and Coos counties, Oregon, from September 1981 to July 1982. A total of 633 radio locations of six bobcats and five coyotes were used to determine home ranges, activity, and habitat-use patterns. Twenty-five prey items were identified in bobcat and coyote scats. Diets of the two species were similar (overlap values were greater than 0.92 for all seasons). Mountain beaver (Aplodontia rufa) remains occurred in over 70% of the scats from both species. Home ranges for radio-collared animals averaged 14 km2 for male coyotes, 12 km2 for female coyotes, 11 km2 for one male bobcat, and 2 km2 for female bobcats. Bobcat and coyote home ranges overlapped in time as well as space. Radio-collared bobcats were detected on occasion within the same clear-cut sites concurrently with radio-collared coyotes, and daily activity patterns were nearly identical between the two predators. Bobcats and coyotes used open areas during nightly hunting activities and retired to forested areas during the day. Coyotes used grassy, more open clearings whereas bobcats favored brushy sites.

scholarly journals The Effects of Forestry Site Preparation on Mountain Beaver Demographics and Associated Damage to Tree Seedlings

2010 ◽  
Vol 25 (3) ◽  
pp. 127-135
Author(s):  
Wendy Arjo
Keyword(s):  
Pacific Northwest ◽  
Management Practices ◽  
Site Preparation ◽  
Home Ranges ◽  
Tree Seedlings ◽  
Animal Damage ◽  
The Pacific ◽  
Mountain Beaver ◽  
Aplodontia Rufa ◽  
Species Specific

Abstract Timber resources are a vital part of the economy in the Pacific Northwest, yet reforestation efforts are often hampered by animal damage. Understanding the factors that influence seedling damage can assist managers in implementing appropriate techniques to reduce species-specific damage. I radio-collared and monitored mountain beavers (Aplodontia rufa) from preharvest to seedling planting to determine the impacts of forest management practices on demographics. In addition, I monitored Douglas-fir (Pseudotsuga menziesii) seedlings on 28 plots on two harvest units (Vesta and Schoolhouse) to determine the effects of chemical site preparation on mountain beaver foraging and subsequent seedling damage. Mountain beaver densities differed between silvicultural treatments (F3,39 = 3.58, P < 0.02), although reproductive success did not (χ2 = 0.14, df = 1, P = 0.70). Larger mountain beaver home ranges were documented in the mature timber compared with those following harvest. Home ranges were also larger in the chemical site preparation portion of the unit (mean = 3.37 ± 0.9 ha) than in the nontreated portion of the unit (mean = 0.82 ± 0.17 ha) on Vesta. Herbicide treatment did not promote seedling damage on either unit. Vegetation does not appear to be the only factor influencing mountain beaver movements and seedling damage. Availability of water is very important for mountain beavers and may also influence their foraging choice, as well as contributing to their increased movements in mature timber (reduced groundwater) versus clearcut areas. Understanding the effects of vegetation on population demographics and subsequent seedling damage may allow for initiating a nonlethal management method using alternative forage.

scholarly journals Small geographic range but not panmictic: how forests structure the endangered Point Arena mountain beaver (Aplodontia rufa nigra)

2012 ◽  
Vol 14 (2) ◽  
pp. 369-383 ◽  
Author(s):  
William J. Zielinski ◽  
Fredrick V. Schlexer ◽  
Sean A. Parks ◽  
Kristine L. Pilgrim ◽  
Michael K. Schwartz
Keyword(s):  
Geographic Range ◽  
Mountain Beaver ◽  
Aplodontia Rufa

Anatomical and physiological evidence for auditory specialization in the mountain beaver (aplodontia rufa)

1973 ◽  
Vol 58 (2) ◽  
pp. 331-344 ◽  
Author(s):  
Michael M. Merzenich ◽  
Leonard Kitzes ◽  
Lindsay Aitkin
Keyword(s):  
Physiological Evidence ◽  
Mountain Beaver ◽  
Aplodontia Rufa
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