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Summer and fall grazing trials were conducted to study the effect of monoterpenoid concentrations on the diet selection of sheep grazing big sagebrush (Artemisia tridentata ssp. tridentata ) range. Total monoterpenoid concentrations were significantly lower in browsed sagebrush plants than in rejected plants. Sheep selected older plants and plant parts, not current season's growth. As annual grasses in the community declined, sheep consumed more sagebrush, resulting in an increase in dietary crude protein but a decline in in vitro organic matter digestibility. This study indicates that monoterpenoid levels, not nutritional constituents, may influence sheep diet selection of sagebrush.
This is the first treatment of the mammals of the Grand Staircase–Escalante National Monument (GSENM). GSENM was established in 1996 as a 1.7-million-acre (680,000-ha) federal land reserve under the jurisdiction of the Bureau of Land Management (BLM). To successfully manage this new monument, the BLM is presently developing a management action plan. To provide information for the proper management of mammal species of the area, we have reviewed background literature for each mammal potentially found within the Monument boundaries. We propose that a core area, surrounded by a buffer matrix, be used in GSENM and surrounding public lands to preserve ecological processes in their natural state. One hundred thirteen...
This is the first treatment of the mammals of the Grand Staircase–Escalante National Monument (GSENM). GSENM was established in 1996 as a 1.7-million-acre (680,000-ha) federal land reserve under the jurisdiction of the Bureau of Land Management (BLM). To successfully manage this new monument, the BLM is presently developing a management action plan. To provide information for the proper management of mammal species of the area, we have reviewed background literature for each mammal potentially found within the Monument boundaries. We propose that a core area, surrounded by a buffer matrix, be used in GSENM and surrounding public lands to preserve ecological processes in their natural state. One hundred thirteen...