Results 51 to 60 of about 5,130 (197)

Differentiating Cheatgrass and Medusahead Phenological Characteristics in Western United States Rangelands

Remote Sensing
Expansions in the extent and infestation levels of exotic annual grass (EAG) within the rangelands of the western United States are well documented. Land managers are tasked with developing plans to limit EAG spread and prevent irreversible ecosystem ...
Trenton D. Benedict, Stephen P. Boyte, Devendra Dahal   +2 more
doaj   +1 more source

De novo genome assembly of the fungal plant pathogen Pyrenophora semeniperda. [PDF]

PLoS ONE, 2014
Pyrenophora semeniperda (anamorph Drechslera campulata) is a necrotrophic fungal seed pathogen that has a wide host range within the Poaceae. One of its hosts is cheatgrass (Bromus tectorum), a species exotic to the United States that has invaded natural
Marcus M Soliai, Susan E Meyer, Joshua A Udall, David E Elzinga, Russell A Hermansen, Paul M Bodily, Aaron A Hart, Craig E Coleman   +7 more
doaj   +1 more source

Post-Fire Vegetation Response in a Repeatedly Burned Low-Elevation Sagebrush Steppe Protected Area Provides Insights About Resilience and Invasion Resistance

Frontiers in Ecology and Evolution, 2020
Sagebrush steppe ecosystems are threatened by human land-use legacies, biological invasions, and altered fire and climate dynamics. Steppe protected areas are therefore of heightened conservation importance but are few and vulnerable to the same impacts ...
Thomas J. Rodhouse, Kathryn M. Irvine, Lisa Bowersock   +2 more
doaj   +1 more source

Ten‐year ecological responses to fuel treatments within semiarid Wyoming big sagebrush ecosystems

Ecosphere, 2022
Sagebrush ecosystems of western North America are threatened by invasive annual grasses and wildfires that can remove fire‐intolerant shrubs for decades. Fuel reduction treatments are used ostensibly to aid in fire suppression, conserve wildlife habitat,
David A. Pyke, Scott E. Shaff, Jeanne C. Chambers, Eugene W. Schupp, Beth A. Newingham, Margaret L. Gray, Lisa M. Ellsworth   +6 more
doaj   +1 more source

Seed weight variation of wyoming sagebrush in Northern Nevada [PDF]

, 2005
Seed size is a crucial plant trait that may potentially affect not only immediate seedling success but also the subsequent generation. We examined variation in seed weight of Wyoming sagebrush (Artemisia tridentata ssp. wyomingensis Beetle and Young), an
Busso, Carlos Alberto, Perryman, Barry L.   +1 more
core   +1 more source

Human-caused climate change in United States national parks and solutions for the future [PDF]

, 2020
Human-caused climate change has exposed the US national park area to more severe increases in heat and aridity than the country as a whole and caused widespread impacts on ecosystems and resources.
Gonzalez, Patrick
core  

Invasion of perennial sagebrush steppe by shallow-rooted exotic cheatgrass reduces stable forms of soil carbon in a warmer but not cooler ecoregion

Environmental Research Communications
Soil organic carbon (‘SOC’) in drylands comprises nearly a third of the global SOC pool and has relatively rapid turnover and thus is a key driver of variability in the global carbon cycle.
Sydney Katz, Toby Maxwell, Marie Anne de Graaff, Matthew J Germino   +3 more
doaj   +1 more source

Ecosystem resilience is evident 17 years after fire in Wyoming big sagebrush ecosystems

Ecosphere, 2016
Recent policy has focused on prevention of wildfire in the sagebrush steppe in an effort to protect habitat for the greater sage grouse (Centrocercus urophasianus).
L. M. Ellsworth, D. W. Wrobleski, J. B. Kauffman, S. A. Reis   +3 more
doaj   +1 more source

Multi-Species Inference of Exotic Annual and Native Perennial Grasses in Rangelands of the Western United States Using Harmonized Landsat and Sentinel-2 Data

Remote Sensing, 2022
The invasion of exotic annual grass (EAG), e.g., cheatgrass (Bromus tectorum) and medusahead (Taeniatherum caput-medusae), into rangeland ecosystems of the western United States is a broad-scale problem that affects wildlife habitats, increases wildfire ...
Devendra Dahal, Neal J. Pastick, Stephen P. Boyte, Sujan Parajuli, Michael J. Oimoen, Logan J. Megard   +5 more
doaj   +1 more source

Working paper 20: Controlling cheatgrass in ponderosa pine and pinyon-juniper restoration areas [PDF]

, 2007
Cheatgrass (Bromus tectorum) is widespread throughout western North America and is a significant concern for land managers conducting restoration treatments in southwestern ponderosa pine and pinyon-juniper forests.
James, Michele A.
core