Filters: Collection: "ir_uspace"
1 - 25 of 4
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
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Ehleringer, James R.; Rickart, Eric Allan; Dearing, Maria-Denise | Stable isotope ratios (?15N AND ?13C) of syntopic shrews (SOREX) | Local species richness in shrew (Soricidae) assemblages is often high, and the mechanisms of ecological separation remain relatively unexplored. In this study, hair samples from 6 species of Sorex in 3 separate assemblages were analyzed for stable carbon (13C/12C) and nitrogen (15N/14N) isotope rati... | 2004 | |
| 2 |
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Ehleringer, James R.; Negus, Norman C. | Red Butte Canyon Research Natural Area: history, flora, geology, climate, and ecology | Red Butte Canyon is a protected, near pristine canyon entering Salt Lake Valley, Utah. It contains a well-developed riparian zone and a perennial stream; hillside vegetation ranges from grasslands on the lower limits to Douglas-fir and aspen stands at the upper elevations. In this paper we describe ... | Intermountain West; Grassland; Oak-maple; Plant adaptation; Red Butte Canyon Research Natural Area; Human impact | 1992 |
| 3 |
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Davidson, Diane W.; Rickart, Eric Allan; Keiter, Robert B. | Selecting wilderness areas to conserve Utah's biological diversity | Congress is currently evaluating the wilderness status of Bureau of Land Management (BLM) public lands in Utah. Wilderness areas play many important roles, and one critical role is the conservation of biological diversity. | Bureau of Land Management; Conservation; Endemic species; Exotic species; Cryptobiotic soils; Plants; Bees; Vertebrates | 1996 |
| 4 |
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Farmer, Colleen G. | New perspective on the origin of endothermy | A new hypothesis for the origin of endothermy in birds is discussed. I suggest extensive parental care provided the initial impetus for the evolution of endothermy. Among extant animals one of the most important functions of an endothermic metabolism is the incubation of embryos. Furthermore, I prop... | Endothermy; Parental care; Thermogenesis; Reproduction; Hormone; Aerobic capacity | 2001 |
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