Seedling Ecology and Restoration of Blackbrush (Coleogyne ramosissima) in the Mojave Desert, United States

2014 ◽  
Vol 22 (5) ◽  
pp. 692-700 ◽  
Author(s):  
Lisa C. Jones ◽  
Susanne Schwinning ◽  
Todd C. Esque
Keyword(s):  
United States ◽  
Mojave Desert ◽  
Seedling Ecology ◽  
Coleogyne Ramosissima

Impacts on ecosystems, corrective restoration practices, and prospects for recovery: nine case studies in the continental United States

2017 ◽  
Vol 39 (6) ◽  
pp. 431 ◽  
Author(s):  
T. A. Jones
Keyword(s):  
United States ◽  
Ecosystem Services ◽  
Chesapeake Bay ◽  
Case Studies ◽  
Great Basin ◽  
Mojave Desert ◽  
Flood Control ◽  
Colorado River ◽  
Longleaf Pine ◽  
Elwha River

Ecological restoration in the United States is growing in terms of the number, size, and diversity of projects. Such efforts are intended to ameliorate past environmental damage and to restore functioning ecosystems that deliver desired levels of ecosystem services. In nine current restoration case studies from across the continental United States, this paper details (1) the impacts of the original disturbance and compounding secondary issues that compel restoration, (2) the corrective practices applied to advance restoration goals, and (3) the prospects for recovery of ecosystem services, including those involving associated animal populations. Ecosystem-altering impacts include flood control (Kissimmee River), flood control and navigation (Atchafalaya Basin), damming for irrigation-water storage (Colorado River) and hydroelectric power (Elwha River), logging and fire suppression (longleaf pine forest), plant invasions that decrease fire-return intervals (Great Basin shrublands, Mojave Desert), nutrient and sediment loading of watersheds (Chesapeake Bay, Mississippi River delta), and conversion of natural lands to agriculture (tallgrass prairie). Animal species targeted for recovery include the greater sage-grouse (Great Basin shrublands), the red-cockaded woodpecker (longleaf pine forest), the south-western willow flycatcher (Colorado River and its tributaries), the desert tortoise (Mojave Desert), eight salmonid fish (Elwha River), and the blue crab and eastern oyster (Chesapeake Bay).

Late Holocene Vegetation Changes in Greenwater Valley, Mojave Desert, California

1985 ◽  
Vol 23 (2) ◽  
pp. 227-235 ◽  
Author(s):  
Kenneth L. Cole ◽  
Robert H. Webb
Keyword(s):  
Lower Limit ◽  
Principal Components ◽  
Mojave Desert ◽  
Late Holocene ◽  
Small Scale ◽  
Vegetation Changes ◽  
Factor Analyses ◽  
Downward Shift ◽  
A Site ◽  
Coleogyne Ramosissima

Small-scale late Holocene vegetation changes were determined from a series of 13 modern and fossil packrat middens collected from a site in the Greenwater Valley, northern Mojave Desert, California. Although the site is above the modern lower limit ofColeogyne ramosissima(black-brush), macrofossils of this shrub are only present in samples younger than 270 yr B.P. In order to measure changes more subtle than presence vs absence, macrofossil concentrations were quantified, and principal components and factor analyses were used to distinguish midden plant assemblages. Both the presence/absence data and the statistical analyses suggest a downward shift of 50 to 100 m forColeogyne(blackbrush) communities between 1435 and 1795 A.D.

Two new and one resurrected species of Enoclerus Gahan (Coleoptera: Cleridae: Clerinae) from the western United States

Zootaxa ◽  
2009 ◽  
Vol 2168 (1) ◽  
pp. 57-62 ◽  
Author(s):  
WILLIAM F. BARR ◽  
JACQUES RIFKIND
Keyword(s):  
United States ◽  
New Species ◽  
Species Distribution ◽  
Mojave Desert ◽  
Western United States ◽  
Valid Species ◽  
Northern Mexico

Enoclerus vernalis, new species, is described from the Mojave Desert of California. Enoclerus valens, new species, is described from Arizona. Enoclerus spinolae (LeConte 1853), broadly distributed in the U. S. Southwest and also occurring in northern Mexico, is resurrected as a valid species. Distribution and biology of some yucca associated Enoclerus species are briefly discussed.

The Pinto shear zone; a Laramide synconvergent extensional shear zone in the Mojave Desert region of the southwestern United States

2005 ◽  
Vol 27 (9) ◽  
pp. 1697-1720 ◽  
Author(s):  
Michael L. Wells ◽  
Mengesha A. Beyene ◽  
Terry L. Spell ◽  
Joseph L. Kula ◽  
David M. Miller ◽  
...  
Keyword(s):  
United States ◽  
Shear Zone ◽  
Mojave Desert ◽  
Southwestern United States ◽  
Desert Region

Paleoclimate effects and geographic barriers shape regional population genetic structure of blackbrush (Coleogyne ramosissima: Rosaceae)

Botany ◽  
2012 ◽  
Vol 90 (4) ◽  
pp. 293-299 ◽  
Author(s):  
Bryce A. Richardson ◽  
Susan E. Meyer
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Population Genetic Structure ◽  
Mojave Desert ◽  
Population Genetic ◽  
Colorado Plateau ◽  
Demographic History ◽  
Future Climate Change ◽  
Surprising Result ◽  
Coleogyne Ramosissima

Coleogyne ramosissima Torr. (blackbrush) is a dominant xerophytic shrub species in the ecotone between the warm and cold deserts of interior western North America. Amplified fragment length polymorphisms (AFLPs) were used to survey genetic diversity and population genetic structure at 14 collection sites across the species range. Analysis revealed significant population differentiation (FST = 0.103, p < 0.0001) and reasonably high levels of genetic diversity (expected heterozygosity; HE = 0.26), a surprising result for a putative paleoendemic species. Model-based Bayesian clustering, principal coordinates analysis, and neighbor-joining analysis all produced support for the existence of two metapopulations, the first centered on the Mojave Desert and the second on the Colorado Plateau. These genetic data, coupled with information from Late Pleistocene and Holocene packrat (genus Neotoma Say and Ord, 1825) middens, illustrate a demographic history in which eastern and western distributions were disjunct during the Last Glacial Maximum and remained so through the Holocene, forming the present-day metapopulations in the Mojave Desert and Colorado Plateau. This strong regional genetic differentiation has implications for population persistence and migration in response to future climate change, as well as for shrubland restoration following anthropogenic disturbances such as annual grass invasion and wildfire.

Sand Transport Paths in the Mojave Desert, Southwestern United States

1995 ◽  
pp. 101-129 ◽  
Author(s):  
James R. Zimbelman ◽  
Steven H. Williams ◽  
Vatche P. Tchakerian
Keyword(s):  
United States ◽  
Mojave Desert ◽  
Sand Transport ◽  
Southwestern United States
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