Experimental Psittacosis in the Pocket Gopher

1934 ◽  
Vol 49 (48) ◽  
pp. 1415 ◽  
Author(s):  
V. M. Hoge
Keyword(s):  
Pocket Gopher

Scales of heterogeneity in prairie and forest

1999 ◽  
Vol 77 (3) ◽  
pp. 370-376 ◽  
Author(s):  
Heather R Kleb ◽  
Scott D Wilson
Keyword(s):  
Species Composition ◽  
Small Scale ◽  
Light Penetration ◽  
Pocket Gopher ◽  
Available N ◽  
Litter Mass ◽  
Thomomys Talpoides ◽  
Mixed Grass ◽  
Below Ground ◽  
Aspen Forest

Few studies have compared scales of heterogeneity among plant communities. We predicted that differences in the sizes of dominant species should allow us to detect small-scale (<256 cm) heterogeneity in mixed-grass prairie but not in adjacent aspen forest. We examined light penetration, soil moisture, available N, elevation, species composition, and plant mass at 10 locations in prairie and forest in both spring and summer. Variables were measured in 1-cm2 plots arranged in pairs separated by 0-256 cm. Several variables in prairie (elevation, litter mass, light penetration, and species composition) showed significant evidence for scale within the range examined. In contrast, only one variable in forest (light penetration in summer) showed evidence for scale in the same range. The scale of heterogeneity in prairie was consistent with the scale of two possible causes, species composition and elevation variability due to northern pocket gopher (Thomomys talpoides Richardson) activity, both of which varied significantly in prairie but not in forest. Whereas some aboveground factors (light and litter mass) varied within the range examined, belowground factors (water and N) did not, suggesting that the scale of heterogeneity differs between above- and below-ground factors. In total, the results suggest that differences in the scale of heterogeneity between prairie and forest reflect the relative sizes of the dominant plants.Key words: aspen, forest, heterogeneity, light, nitrogen, prairie, scale, soil, water.

scholarly journals Characteristics of Pocket Gopher Populations in Relation to Selected Environmental Factors in Pelican Valley, Yellowstone National Park

1979 ◽  
Vol 3 ◽  
pp. 133-137
Author(s):  
C. Youmans ◽  
R. Moore
Keyword(s):  
Environmental Factors ◽  
Yellowstone National Park ◽  
National Park ◽  
Ursus Arctos ◽  
Water Levels ◽  
Specific Information ◽  
Pocket Gopher ◽  
Pocket Gophers ◽  
Thomomys Talpoides ◽  
Ursus Arctos Horribilis

Several important environmental factors which affect the dynamics of pocket gopher populations have been identified: water content at peak snowpack and depth of snow in spring (Hansen and Ward, 1966; Reid, 1973); weather and Its influence on annual food supplies and cover (Howard and Childs, 1959); production of annual and perennial forbs (Keith et al., 1959; Tietjen et al., 1967); and ground water levels and snow depths (Ingles, 1949; Hansen, 1962). A need for specific information on pocket gophers in Pelican Valley, Yellowstone National Park arose from interest in interactions between grizzly bears (Ursus arctos horribilis) and northern pocket gophers (Thomomys talpoides). Mealey (1975) and Graham (1978) suggested that pocket gophers and their caches may serve as seasonally important food items for grizzlies in Yellowstone National Park.

Process-based model linking pocket gopher (Thomomys bottae) activity to sediment transport and soil thickness

Geology ◽  
2005 ◽  
Vol 33 (11) ◽  
pp. 917 ◽  
Author(s):  
Kyungsoo Yoo ◽  
Ronald Amundson ◽  
Arjun M. Heimsath ◽  
William E. Dietrich
Keyword(s):  
Sediment Transport ◽  
Pocket Gopher ◽  
Soil Thickness ◽  
Thomomys Bottae
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