Demographic Characteristics of 3 Artemisia tridentata Nutt. Subspecies
نویسندگان
چکیده
منابع مشابه
Differences in Drought Adaptation between Subspecies of Sagebrush (artemisia Tridentata)
Three subspecies of Artemisia tridentata occupy distinct habitats in the Great Basin of North America: ssp. wyomingensis in low, arid elevations; ssp. vaseyana in high, mesic elevations; and ssp. tridentata in intermediate zones. We evaluated differences in the drought experienced and drought tolerance among the subspecies. Drought tolerance was measured by two traits: the xylem pressure (Cx) c...
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PREMISE OF THE STUDY Seed longevity and persistence in soil seed banks may be especially important for population persistence in ecosystems where opportunities for seedling establishment and disturbance are unpredictable. The fire regime, an important driver of population dynamics in sagebrush steppe ecosystems, has been altered by exotic annual grass invasion. Soil seed banks may play an activ...
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The heritability of diet selection for mountain big sagebrush (Artemisia tridentata Nutt. ssp. vaseyana [Rydb] Beetle) by grazing sheep was estimated from fecal samples collected from 549 Rambouillet ewes. Fecal samples were collected in September and October during 1996 and 1997 from free-grazing ewes on intermountain sagebrush-bunchgrass rangelands at the U.S. Sheep Experiment Station in Idah...
متن کاملAge Discrepancies with the Radiocarbon Dating of Sagebrush (Artemisia tridentata Nutt.)
When ancient hearths at open archaeological sites do not yield carbonized annual plant remains or other highquality samples, wood charcoal is commonly used for radiocarbon dating. Sagebrush (Artemisia tridentata Nutt.), a shrub frequently used for fuel across much of the western United States, seems a potentially better candidate for 14C dating than tree wood since the possibility for significa...
متن کاملCombined drought and episodic freezing effects on seedlings of low- and high-elevation subspecies of sagebrush (Artemisia tridentata)
doi: 10.1111/j.1399-3054.2007.00904.x Big sagebrush (Artemisia tridentata) is a dominant shrub throughout much of the arid western United States. Several recognized subspecies differ in physiology, morphology and in their distribution in relation to soil water availability. While several studies have compared mature individuals of these subspecies, there is little information on seedling physio...
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ژورنال
عنوان ژورنال: Journal of Range Management
سال: 2001
ISSN: 0022-409X
DOI: 10.2307/4003178