scholarly journals Fire History and Western Juniper Encroachment in Sagebrush Steppe

1999 ◽  
Vol 52 (6) ◽  
pp. 550 ◽  
Author(s):  
Richard F. Miller ◽  
Jeffrey A. Rose
Keyword(s):  
Fire History ◽  
Sagebrush Steppe ◽  
Western Juniper

Spatial patterns on the sagebrush steppe/Western juniper ecotone

Plant Ecology ◽  
2006 ◽  
Vol 190 (2) ◽  
pp. 159-173 ◽  
Author(s):  
Eva K. Strand ◽  
Andrew P. Robinson ◽  
Stephen C. Bunting
Keyword(s):  
Spatial Patterns ◽  
Sagebrush Steppe ◽  
Western Juniper

Restoration of Mountain Big Sagebrush Steppe Following Prescribed Burning to Control Western Juniper

2014 ◽  
Vol 53 (5) ◽  
pp. 1015-1022 ◽  
Author(s):  
K. W. Davies ◽  
J. D. Bates ◽  
M. D. Madsen ◽  
A. M. Nafus
Keyword(s):  
Prescribed Burning ◽  
Sagebrush Steppe ◽  
Big Sagebrush ◽  
Western Juniper

scholarly journals The Seasonal Water Balance of Western-Juniper-Dominated and Big-Sagebrush-Dominated Watersheds

Hydrology ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 156
Author(s):  
Nicole Durfee ◽  
Carlos G. Ochoa
Keyword(s):  
Water Balance ◽  
Water Availability ◽  
Potential Evapotranspiration ◽  
Shallow Aquifer ◽  
Annual Precipitation ◽  
Sagebrush Steppe ◽  
Deep Percolation ◽  
Aquifer Recharge ◽  
Big Sagebrush ◽  
Western Juniper

The combined impacts of woody plant encroachment and climate variability have the potential to alter the water balance in many sagebrush steppe ecosystems in the Western USA, leading to reduced water availability in these already water-scarce regions. This study compared the water-balance characteristics of two adjacent semiarid watersheds in central Oregon, USA: one dominated by big sagebrush and one dominated by western juniper. Precipitation, springflow, streamflow, shallow groundwater levels, and soil moisture were measured. The potential evapotranspiration was calculated using the Hargreaves–Samani method. Potential evapotranspiration and a water-balance approach were used to calculate seasonal actual evapotranspiration. The shallow aquifer recharge was calculated using the Water-Table-Fluctuation-Method. Evapotranspiration, followed by deep percolation, accounted for the largest portion (83% to 86% of annual precipitation) of water output for both watersheds. Springflow and streamflow rates were generally greater at the sagebrush-dominated watershed. Snow-dominated years showed greater amounts of groundwater recharge and deep percolation than years where a larger portion of precipitation fell as rain, even when total annual precipitation amounts were similar. This study’s results highlight the role of vegetation dynamics, such as juniper encroachment, and seasonal precipitation characteristics, on water availability in semiarid rangeland ecosystems.

scholarly journals Relationships Between Western Juniper (Juniperus occidentalis) and Understory Vegetation

2008 ◽  
Vol 1 (1) ◽  
pp. 3-11 ◽  
Author(s):  
D. E. Coultrap ◽  
K. O. Fulgham ◽  
D. L. Lancaster ◽  
J. Gustafson ◽  
D. F. Lile ◽  
...  
Keyword(s):  
Canopy Cover ◽  
Understory Vegetation ◽  
Sagebrush Steppe ◽  
Grass Cover ◽  
Bare Ground ◽  
Western Juniper ◽  
Steppe Communities ◽  
Juniper Woodland ◽  
Successional Stages ◽  
The Impact

AbstractWestern juniper has been actively invading sagebrush plant communities for about 130 yr. Western juniper canopy cover generally increases as western juniper invades sagebrush steppe communities and succession progresses toward a western juniper woodland. Our goal was to estimate the impact of juniper invasion and canopy increase on understory vegetation structure and productivity on 101 sites in northeastern California. The primary objectives of this study were to: (1) examine the influence of increasing western juniper canopy cover on the composition and productivity of understory vegetation; and (2) assess the effects of western juniper removal on understory vegetation. Sites in early, mid-, and late successional stages and sites on the same soils that had not been invaded were selected. Sites where western juniper had been removed by prescribed fire, mechanical, or chemical methods were compared to adjacent untreated sites. Western juniper canopy cover, understory cover and species composition, productivity, and bare ground were determined at each site during May through July 2005 and 2006. Regression analysis was used to evaluate the relationship between western juniper canopy cover and understory vegetation parameters. Logistic regression was used to detect understory differences between treated (juniper removed) and untreated (juniper not removed) sites. A significant relationship was found between western juniper canopy cover and understory species richness, shrub cover, forb cover, total grass cover, cheatgrass cover, herbaceous productivity, and bare ground. Removal of western juniper increased total grass cover, cheatgrass cover, and productivity, and reduced bare ground. The results of this study support findings by researchers in other states that western juniper influences plant community structure and productivity, and removal of western juniper might reverse these changes in structure, but also might increase opportunities for invasion of cheatgrass.

scholarly journals Demography and Fire History of a Western Juniper Stand

1981 ◽  
Vol 34 (6) ◽  
pp. 501 ◽  
Author(s):  
James A. Young ◽  
Raymond A. Evans
Keyword(s):  
Fire History ◽  
Western Juniper ◽  
History Of

scholarly journals Meteorological, snow, streamflow, topographic, and vegetation height data from four western juniper-dominated experimental catchments in southwestern Idaho, USA

2017 ◽  
Vol 9 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Patrick R. Kormos ◽  
Danny G. Marks ◽  
Frederick B. Pierson ◽  
C. Jason Williams ◽  
Stuart P. Hardegree ◽  
...  
Keyword(s):  
Great Basin ◽  
Agricultural Research ◽  
Sagebrush Steppe ◽  
Vegetation Height ◽  
Western Juniper ◽  
Hourly Data ◽  
Modeling Data ◽  
Basin Region ◽  
Height Data

Abstract. Meteorological, snow, streamflow, topographic, and vegetation height data are presented from the South Mountain experimental catchments. This study site was established in 2007 as a collaborative, long-term research laboratory to address the impacts of western juniper encroachment and woodland treatments in the interior Great Basin region of the western USA. The data provide detailed information on the weather and hydrologic response from four highly instrumented catchments in the late stages of woodland encroachment in a sagebrush steppe landscape. Hourly data from six meteorologic stations and four weirs have been carefully processed, quality-checked, and are serially complete. These data are ideal for hydrologic, ecosystem, and biogeochemical modeling. Data presented are publicly available from the USDA National Agricultural Library administered by the Agricultural Research Service (https://data.nal.usda.gov/dataset/data-weather-snow-and-streamflow-data-four-western-juniper-dominated-experimental-catchments, doi:10.15482/USDA.ADC/1254010).

scholarly journals Weather, snow, and streamflow data from four western juniper-dominated experimental catchments in southwestern Idaho, USA

2016 ◽  
Author(s):  
Patrick R. Kormos ◽  
Danny G. Marks ◽  
Frederick B. Pierson ◽  
C. Jason Williams ◽  
Stuart P. Hardegree ◽  
...  
Keyword(s):  
Great Basin ◽  
Agricultural Research ◽  
Sagebrush Steppe ◽  
Western Juniper ◽  
Hourly Data ◽  
Streamflow Data ◽  
Modeling Data ◽  
Basin Region ◽  
Late Stages

Abstract. Weather, snow, stream, topographic, and vegetation data are presented from the South Mountain Experimental Catchments. This study site was established in 2007 as a collaborative, long-term research laboratory to address the impacts of western juniper encroachment and woodland treatments in the interior Great Basin region of the western USA. The data provide detailed information on the weather and hydrologic response from four highly instrumented catchments in the late stages of woodland encroachment in a sagebrush steppe landscape. Hourly data from six meteorologic stations and four weirs have been carefully processed, quality checked, and are serially complete. These data are ideal for hydrologic, ecosystem, and biogeochemical modeling. Data presented are publicly available from the USDA National Agricultural Library administered by the Agricultural Research Service (https://data.nal.usda.gov/dataset/data-weather-snow-and-streamflow-data-four-western-juniper-dominated-experimental-catchments, doi:10.15482/USDA.ADC/1254010).

scholarly journals Bird Responses to Removal of Western Juniper in Sagebrush-Steppe

2017 ◽  
Vol 70 (1) ◽  
pp. 87-94 ◽  
Author(s):  
Aaron L. Holmes ◽  
Jeremy D. Maestas ◽  
David E. Naugle
Keyword(s):  
Sagebrush Steppe ◽  
Western Juniper
Sign in / Sign up

Export Citation Format

Share Document