scholarly journals MODELING DISTRIBUTIONS OF RARE PLANTS IN THE GREAT BASIN, WESTERN NORTH AMERICA

2007 ◽  
Vol 67 (1) ◽  
pp. 26-38 ◽  
Author(s):  
M. Aitken ◽  
D. W. Roberts ◽  
L. M. Shultz
2008 ◽  
Vol 35 (11) ◽  
pp. 2102-2118 ◽  
Author(s):  
John C. Hafner ◽  
Nathan S. Upham ◽  
Emily Reddington ◽  
Candice W. Torres

2008 ◽  
Vol 73 (1) ◽  
pp. 83-102 ◽  
Author(s):  
Phil R. Geib ◽  
Edward A. Jolie

Despite ranking at the low end of the continuum in net caloric benefit relative to other foods, small seeds assumed great dietary importance in many parts of the world, including western North America. In a series of publications, Adovasio (1970a, 1974, 1980, 1986) argued that coiled basketry technology was invented in the eastern Great Basin during the early Holocene as a specialized food-processing technique. Coiled baskets are indeed useful for collecting and processing seeds, but it does not necessarily follow that they were originally designed for this purpose. A whole basket recently discovered at Cowboy Cave in southeastern Utah returned an AMS radiocarbon assay of 7960 ± 50 B.P., making it currently the earliest directly dated coiled basket from the Americas. This basket is not a parching tray and likely had nothing to do with harvesting seeds. We discuss the implications of this find with regard to tracking the temporal spread of coiled basketry technology in western North America and the role of coiled and twined forms in the initiation of small seed exploitation. Coiled and twined baskets for small seed processing may result from reconfiguration of existing technologies to create novel forms suited to a new food exploitation strategy.


1996 ◽  
Vol 10 (2) ◽  
pp. 384-391 ◽  
Author(s):  
James A. Young ◽  
William S. Longland

Our purpose is to discuss the impact of alien plants on rangeland ecosystems of the Great Basin in terms of their effects on biological functions. The sagebrush/bunchgrass ranges of western North America are used as a model ecosystem for the impact of alien plants. Alien weed species have been introduced in successive waves, with the success of each new introduction dependent on how well adapted to the environment and how competitive the new weed is with those previously introduced. Annual species have been successful across extensive areas of Great Basin rangelands. Biennial and short- and long-lived perennial introductions have been restricted to much more specific habitats. Alien plants impact rangelands through stand renewal and successional processes. Alien weeds can cause such processes to be accelerated and/or truncated depending on the species and range site.


2003 ◽  
Vol 115 (10) ◽  
pp. 1278 ◽  
Author(s):  
James H. Trexler, ◽  
Patricia H. Cashman ◽  
James C. Cole ◽  
Walter S. Snyder ◽  
Richard M. Tosdal ◽  
...  

1999 ◽  
Vol 52 (3) ◽  
pp. 316-327 ◽  
Author(s):  
Dorothy Sack

Deposits of a transgressive-phase Lake Bonneville stillstand or oscillation are found just below the elevation of the regressive-phase Provo shoreline at numerous exposures throughout the Bonneville basin. Existence of these subProvo shoreline deposits provides a new explanation for the massive size of Provo depositional and erosional landforms, which can no longer be explained by a long stillstand at the Provo shoreline. Provo coastal landforms are large because they are superimposed on subProvo landforms. Results also help to clarify divergent interpretations regarding the relative age of the Provo shoreline and the number of times it was occupied by the water plane. Occupation of approximately the same level during both the transgressive and the regressive phase of Lake Bonneville may be coincidental, or it may indicate that a bedrock sill controlled outflow at subProvo as well as Provo time. Rise to the Bonneville level could have occurred after massive slope failure plugged the outlet pass.


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