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Articles 1 - 5 of 5
Full-Text Articles in Biology
Interaction Between Winter Dominance And Territory Defense In Male Pronghorn Antelope, Antilocapra Americana, Charles William Gunnels Iv
Interaction Between Winter Dominance And Territory Defense In Male Pronghorn Antelope, Antilocapra Americana, Charles William Gunnels Iv
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In a territorial population of pronghorn from Antelope Island, UT, interaction between male dominance and territory defense was examined. High-ranking males were more likely to defend territories. Closely ranked animals engaged in more dominance interactions than distantly ranked individuals, and middle-ranked animals were involved in disproportionately more interactions than either high- or low-ranking animals. Large males possessed large horns and prongs as well as small cheek patches. Results from a factor analysis suggested that large males defended territories with a high density of sage. However, in this study, we did not observe pronghorn feed on sage during the territorial season. …
The Reproductive Biology And Edaphic Characteristics Of A Rare, Gynodioecious Saxifage: Saxifraga Bryophora Var. Tobiasiae (Saxifragaceae), Kimberly Pierson
The Reproductive Biology And Edaphic Characteristics Of A Rare, Gynodioecious Saxifage: Saxifraga Bryophora Var. Tobiasiae (Saxifragaceae), Kimberly Pierson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
I examined the reproductive biology and general ecology of Saxifraga bryophora var. tobiasiae, a rare saxifrage endemic to the West Salmon River Mountains of central Idaho. Saxifraga bryophora var. tobiasiae combines asexual reproduction via bulbils with a sexual mixed-mating system. Flower production occurred in 1996 only, whereas bulbil production occurred in 1995, 1996, and 1997. Bulbil production precedes floral bud formation and is the dominant form of reproduction. When flowering occurs, outcrossing is promoted by protandry and the gynodioecious mating system found in all populations. No autogamous or agamospermous seed set was observed in either female or hermaphrodite flowers, …
Predictively Mapping The Plant Associations Of The North Fork John Day Wilderness In Northeastern Oregon Using Classification Tree Modeling, Alison M. Kelly
Predictively Mapping The Plant Associations Of The North Fork John Day Wilderness In Northeastern Oregon Using Classification Tree Modeling, Alison M. Kelly
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Shifting perspectives on restoration and management of public lands in the inland West have resulted in an increased need for maps of potential natural vegetation which cover large areas at sufficient scale to delineate individual stands. In this study, classification tree modeling was used to predictively model and map the plant association types of a relatively undisturbed wilderness area in the Blue Mountains of northeastern Oregon. Models were developed using field data and data derived from a geographic information system database. Elevation, slope, aspect, annual precipitation, solar radiation, soil type, and topographic position were important predictor variables. The model predicted …
Home Range (?) Of The Flat-Tailed Horned Lizard Phrynosoma Mcallii, Peggy Anderson Miller
Home Range (?) Of The Flat-Tailed Horned Lizard Phrynosoma Mcallii, Peggy Anderson Miller
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Area used by male and female Phrynosoma mcallii (Hallowell) was studied in a population located on the Barry M. Goldwater Aerial Gunnery Range near Yuma, Arizona. Area used by males and females shifted through time and did not fit the definition of home range. Summer male and female area used was not significantly different (F=2.625, df=1, P=0.131), but male areas used were significantly larger for 15-day time periods (F=9.67, P=0.0003). Males overlapped the area they occupied in consecutive 15-day time periods more often than did females. Female area used never overlapped within a 15-day time period. Male area used overlapped …
Acetate Retention And Metabolism In Thehyporheic Zone Of A Mountain Stream, Michelle A. Baker
Acetate Retention And Metabolism In Thehyporheic Zone Of A Mountain Stream, Michelle A. Baker
Michelle A. Baker
An in situ acetate injection was used to determine the influence of labile dissolved organic carbon (DOC) availability on microbial respiration in the hyporheic zone of a headwater stream. We added bromide as a conservative tracer and acetate as an organic substrate to the hyporheic zone of Rio Calaveras, New Mexico, via an injection well. Tracer was observed in four of eight capture wells. Three of the four wells showed increases in bromide without concurrent increases in acetate concentration, suggesting 100% acetate retention. One well had 38% acetate retention. Pore velocity and acetate retention were negatively correlated, suggesting hydrologic control …