Treesearch - scientific articles written or published by the U.S. Forest Service

Show/Hide Search Form

Keywords (All fields) or Title:

Last Name of Author:

Date Range:

FS Series:

Subscribe to R&D Publications recently added to Treesearch - RSS feed More RSS options

Displaying 1 - 20 of 33

Pages

Records Per Page:

Sort By:

Introduction: Exotic annual Bromus in the western USA [Chapter 1]

The spread and impacts of exotic species are unambiguous, global threats to many ecosystems. A prominent example is the suite of annual grasses in the Bromus genus (Bromus hereafter) that originate from Europe and Eurasia but have invaded or are invading large areas of the Western USA. This book brings a diverse, multidisciplinary group of authors together to...

https://www.fs.usda.gov/treesearch/search?keywords=%22USA%29%22&%3Bf%5B0%5D=author_facet%3A%22Hollingsworth%2C%20Teresa%22&f%5B0%5D=author_facet%3A%22Harvey%2C%20Bret%22&f%5B1%5D=author_facet%3A%22Sanderlin%2C%20Jamie%22&f%5B2%5D=author_facet%3A%22Doudrick%2C%20Rob%22&f%5B3%5D=author_facet%3A%22Urbanski%2C%20Shawn%22&f%5B4%5D=author_facet%3A%22DeRose%2C%20R.%20Justin%22&f%5B5%5D=author_facet%3A%22Chambers%2C%20Jeanne%22&f%5B6%5D=author_facet%3A%22Zimmerman%2C%20Patrick%20L.%22

Author(s):

Matthew J. Germino; Jeanne C. Chambers; Cynthia S. Brown

Year:

2016

Keywords:

resistance, resilience, exotic annual Bromus grasses, western USA

Source:

In: Germino, Matthew J.; Chambers, Jeanne C.; Brown, Cynthia S, eds. 2016. Exotic brome-grasses in arid and semiarid ecosystems of the western US: Causes, consequences, and management implications. Springer: Series on Environmental Management. p. 1-7.

Leaf area and structural changes after thinning in even-aged Picea rubens and Abies balsamea stands in Maine, USA

We tested the hypothesis that changes in leaf area index (LAIm2 m-2) and mean stand diameter following thinning are due to thinning type and residual density. The ratios of pre- to postthinning diameter and LAI were used to assess structural changes between replicated crown, dominant, and low thinning treatments to 33% and 50% residual density in even-aged Picea rubens...

Author(s):

R. Justin DeRose; Robert S. Seymour

Year:

2012

Keywords:

leaf area index, Picea rubens, Abies balsamea

Source:

International Journal of Forestry Research. 2012: Article ID 181057.

Long-term landscape changes in a subalpine spruce-fir forest in central Utah, USA

In Western North America, increasing wildfire and outbreaks of native bark beetles have been mediated by warming climate conditions. Bioclimatic models forecast the loss of key high elevation species throughout the region. This study uses retrospective vegetation and fire history data to reconstruct the drivers of past disturbance and environmental change....

Author(s):

Jesse L. Morris; R. Justin DeRose; Andrea R. Brunelle

Year:

2015

Keywords:

spruce beetle, climate change, dendroctonus, engelmann spruce, logging, western North America, wildfire

Source:

Forest Ecosystems. 2: 35.

Climate variability and fire effects on quaking aspen in the central Rocky Mountains, USA

Our understanding of how climate and fire have impacted quaking aspen (Populus tremuloides Michx.) communities prior to the 20th century is fairly limited. This study analysed the period between 4500 and 2000 cal. yr BP to assess the pre-historic role of climate and fire on an aspen community during an aspen-dominated period.

Author(s):

Vachel A. Carter; Andrea Brunelle; Thomas A. Minckley; John D. Shaw; R. Justin DeRose; Simon Brewer

Year:

2017

Keywords:

aspen, climate variability, disturbance, drought, fire history, late Holocene, palaeoecology, pollen, Rocky Mountains, vegetation change

Source:

Journal of Biogeography. doi: 10.1111/jbi.12932.

Effect of increasing temperatures on the distribution of spruce beetle in Engelmann spruce forests of the Interior West, USA

The spruce beetle (Dendoctronus rufipennis) is a pervasive bark beetle indigenous to spruce (Picea spp.) forests of North America. In the last two decades outbreaks of spruce beetle have increased in severity and extent. Increasing temperatures have been implicated as they directly control beetle populations, potentially inciting endemic populations to build to...

Author(s):

R. Justin DeRose; Barbara J. Bentz; James N. Long; John D. Shaw

Year:

2013

Keywords:

BIOMOD, Forest Inventory and Analysis, global climate change, niche modeling, species distribution modeling

Source:

Forest Ecology and Management. 308: 198-206.

Herbivory and advance reproduction influence quaking aspen regeneration response to management in southern Utah, USA

Recent concern regarding the potential decline of quaking aspen (Populus tremuloides Michx.) forests in the western United States has sparked concern over whether the species can be effectively regenerated. Using a retrospective approach, we quantified the response of regenerating aspen stems to an ordinary set of silvicultural treatments conducted over...

Author(s):

Justin M. Britton; R. Justin DeRose; Karen E. Mock; James N. Long

Year:

2016

Keywords:

browsing, coppice, herbivory, Populus tremuloides, silviculture

Source:

Canadian Journal of Forest Research. 46: 674-682.

Modeling and predicting vegetation response of western USA grasslands, shrublands, and deserts to climate change (Chapter 1)

Experimental research and species distribution modeling predict large changes in the distributions of species and vegetation types in the Interior West due to climate change. Species? responses will depend not only on their physiological tolerances but also on their phenology, establishment properties, biotic interactions, and capacity to evolve and migrate. Because...

Author(s):

Megan M. Friggens; Marcus V. Warwell; Jeanne C. Chambers; Stanley G. Kitchen

Year:

2012

Keywords:

climate change, grasslands, shrublands, deserts, assessment

Source:

In: Finch, Deborah M., ed. Climate change in grasslands, shrublands, and deserts of the interior American West: a review and needs assessment. Gen. Tech. Rep. RMRS-GTR-285. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 1-20.

Simulation of quaking aspen potential fire behavior in Northern Utah, USA

Current understanding of aspen fire ecology in western North America includes the paradoxical characterization that aspen-dominated stands, although often regenerated following fire, are ?fire-proof?. We tested this idea by predicting potential fire behavior across a gradient of aspen dominance in northern Utah using the Forest Vegetation Simulator and the Fire and...

Author(s):

R. Justin DeRose; A. Joshua Leffler

Year:

2014

Keywords:

canopy base height, canopy bulk density, crowning index, Populus tremuloides, species composition, torching index

Source:

Forests. 5: 3241-3256.

Tree-ring reconstruction of the level of Great Salt Lake, USA

Utah's Great Salt Lake (GSL) is a closed-basin remnant of the larger Pleistocene-age Lake Bonneville. The modern instrumental record of the GSL-level (i.e. elevation) change is strongly modulated by Pacific Ocean coupled ocean/atmospheric oscillations at low frequency, and therefore reflects the decadalscale wet/dry cycles that characterize the region. A within-...

Author(s):

R. Justin DeRose; Shih-Yu Wang; Brendan M. Buckley; Matthew F. Bekker

Year:

2014

Keywords:

decadal oscillation, dendroclimatology, drought cycle, Great Basin, paleohydrology, pluvial

Source:

The Holocene. 24(7): 805-813.

Statistical treatment for the wet bias in tree-ring chronologies: A case study from the InteriorWest, USA

Dendroclimatic research has long assumed a linear relationship between tree-ring increment and climate variables. However, ring width frequently underestimates extremely wet years, a phenomenon we refer to as ?wet bias?. In this paper, we present statistical evidence for wet bias that is obscured by the assumption of linearity. To improve tree-ring-climate modeling, we...

Author(s):

Yan Sun; Matthew F. Bekker; R. Justin DeRose; Roger Kjelgren; S. -Y. Simon Wang

Year:

2017

Keywords:

dendrochronology, dendroclimatology, likelihood-based modeling, saturation

Source:

Environmental and Ecological Statistics. 24: 131-150.

Climate change vulnerability assessment of forests in the Southwest USA

Climate change effects are already apparent in some Southwestern US forests and are expected to intensify in the coming decades, via direct (temperature, precipitation) and indirect (fire, pests, pathogens) stressors. We grouped Southwestern forests into ten major types to assess their climate exposure by 2070 using two global climate models (GCMs) and two emission...

Author(s):

James H. Thorne; Hyeyeong Choe; Peter A. Stine; Jeanne C. Chambers; Andrew Holguin; Amber C. Kerr; Mark W. Schwartz

Year:

2017

Keywords:

forests, Southwest, wildfire, drought, pathogens, adaptation

Source:

Climatic Change. 148: 387-402.

Functionally relevant climate variables for arid lands: Aclimatic water deficit approach for modelling desert shrub distributions

We have three goals. (1) To develop a suite of functionally relevant climate variables for modelling vegetation distribution on arid and semi-arid landscapes of the Great Basin, USA. (2) To compare the predictive power of vegetation distribution models based on mechanistically proximate factors (water deficit variables) and factors that are more mechanistically removed...

Author(s):

Thomas E. Dilts; Peter J. Weisberg; Camie M. Dencker; Jeanne C. Chambers

Year:

2015

Keywords:

climatic water deficit, climograph, cold desert shrubs, gradient analysis, Great Basin, mechanistic model, PRISM, species distribution modelling, water balance, western USA

Source:

Journal of Biogeography. doi: 10.1111/jbi.12561

Geomorphic predictors of riparian vegetation in small mountain watersheds

Hydrogeomorphic processes operating at watershed, process zone and site scales influence the distribution of riparian vegetation. However, most studies examining the relationships between hydrogeomorphic processes and riparian vegetation are conducted at site scales. We quantified the relative importance of watershed, process zone and site geomorphic characteristics...

Author(s):

Blake M. Engelhardt; Jeanne C. Chambers; Peter J. Weisberg

Year:

2015

Keywords:

Great Basin, multiscale, plant community analysis, process zone, riparian

Source:

Engelhardt, Blake M.; Chambers, Jeanne C.; Weisberg, Peter J. 2015. Geomorphic predictors of riparian vegetation in small mountain watersheds. Journal of Plant Ecology. doi: 10.1093/jpe/rtv002

Snow-covered Landsat time series stacks improve automated disturbance mapping accuracy in forested landscapes

Accurate landscape-scale maps of forests and associated disturbances are critical to augment studies on biodiversity, ecosystem services, and the carbon cycle, especially in terms of understanding how the spatial and temporal complexities of damage sustained from disturbances influence forest structure and function. Vegetation change tracker (VCT) is a highly automated...

Author(s):

Kirk M. Stueve; Ian W. Housman; Patrick L. Zimmerman; Mark D. Nelson; Jeremy B. Webb; Charles H. Perry; Robert A. Chastain; Dale D. Gormanson; Chengquan Huang; Sean P. Healey; Warren B. Cohen

Year:

2011

Keywords:

Eastern deciduous forest, automated disturbance mapping, forest disturbance commission errors, Landsat time series stacks, Great Lakes, mixed northern hardwoods, satellite remote sensing, snow, Southern boreal forest, validation, vegetation change tracker, winter

Source:

Remote Sensing of Environment. 115: 3203-3219

Variation in ant populations with elevation, tree cover, and fire in a pinyon-juniper-dominated watershed

Climate change and fire suppression have facilitated expansion of pinyon-juniper woodlands into sagebrush- steppe ecosystems of the Great Basin, USA, resulting in a loss of biological diversity. To assess the effects of using prescribed fire in restoration efforts, ant abundance, species richness, and composition were examined pre- and post-burn along the elevation and...

Author(s):

Eugenie M. MontBlanc; Jeanne C. Chambers; Peter E. Brussard

Year:

2007

Keywords:

ants, prescribed fire, elevation gradients, tree cover, Great Basin, pinyon-juniper woodland, sagebrush steppe, ecosystem management, restoration

Source:

Western North American Naturalist. 67(4): 469-491.

Selection of RAPD markers for investigation of genetic population structure in fusiform rust fungus infecting loblolly pine

research to determine patterns of genetic differentiation among and within field populations of Cronartium quercuum f. sp. fusiforme using RAPD markers is currently underway in the molecular genetics laboratory at the Southern Institute of Forest Genetics. Fungal tissue was collected as a drop of spermatia or scrapings of a...

Author(s):

James H. Roberds; Thomas L. Kubisiak; Pauline C. Spaine; S.F. Covert; R.L. Doudrick

Year:

1997

Keywords:

Cronartium quernnmt f. sp. fusiforme, genetic diversity, mendelian segregation, polymerase chain reaction.

Source:

24<sup>th</sup> Biennial Southern Forest Tree Improvement Conference, Orlando, Florida USA JUNE 9-12, 1997

Influence of a native legume on soil N and plant response following prescribed fire in sagebrush steppe

Woodland expansion affects grasslands and shrublands on a global scale. Prescribed fire is a potential restoration tool, but recovery depends on nutrient availability and species responses after burning. Fire often leads to longterm losses in total nitrogen, but presence of native legumes can influence recovery through addition of fixed nitrogen.We examined the effects...

Author(s):

Erin M. Goergen; Jeanne C. Chambers

Year:

2009

Keywords:

community recovery, disturbance, Lupinus argenteus, nitrogen

Source:

International Journal of Wildland fire. 18: 665-675.

Abiotic and biotic influences on Bromus tectoreum invasion and Artemisia tridentata recovery after fire

Native sagebrush ecosystems in the Great Basin (western USA) are often invaded following fire by exotic Bromus tectorum (cheatgrass), a highly flammable annual grass. Once B. tectorum is established, higher fire frequencies can lead to local extirpation of Artemisia tridentata ssp. vaseyana (mountain big sagebrush) and have cascading effects on sagebrush ecosystems and...

Author(s):

Lea Condon; Peter J. Weisberg; Jeanne C. Chambers

Year:

2011

Keywords:

fire effects, Great Basin, landscape-scale, structural equation modelling, succession

Source:

International Journal of Wildland Fire. 20: 597-604.

Drought-driven disturbance history characterizes a southern Rocky Mountain subalpine forest

The view that subalpine forest vegetation dynamics in western North America are "driven" by a particular disturbance type (i.e., fire) has shaped our understanding of their disturbance regimes. In the wake of a recent (1990s) landscape- extent spruce beetle (Dendroctonus rufipennis Kirby) outbreak in the southern Rocky Mountains, we re-examined the temporal...

Author(s):

R. Justin DeRose; James N. Long

Year:

2012

Keywords:

drought, disturbance, subalpine forest

Source:

Canadian Journal of Forest Research. 42: 1649-1660.

Using fire regimes to delineate zones in a high-resolution lake sediment record from the western United States

Paleoenvironmental reconstructions are important for understanding the influence of long-term climate variability on ecosystems and landscape disturbance dynamics. In this paper we explore the linkages among past climate, vegetation, and fire regimes using a high-resolution pollen and charcoal reconstruction from Morris Pond located on the Markagunt Plateau in...

Author(s):

Jesse L. Morris; Andrea Brunelle; R. Justin DeRose; Heikki Seppa; Mitchell J. Power; Vachel Carter; Ryan Bares

Year:

2013

Keywords:

charcoal, fire regime, fire season, forest disturbance, lake sediments, pollen, paleoecology, regime shift, spruce-fir forest, wildfire

Source:

Quaternary Research. 79: 24-36.

Pages

Total Publications in Treesearch: 53,194

Show/Hide Search Form

Pages

Introduction: Exotic annual Bromus in the western USA [Chapter 1]

Leaf area and structural changes after thinning in even-aged Picea rubens and Abies balsamea stands in Maine, USA

Long-term landscape changes in a subalpine spruce-fir forest in central Utah, USA

Climate variability and fire effects on quaking aspen in the central Rocky Mountains, USA

Effect of increasing temperatures on the distribution of spruce beetle in Engelmann spruce forests of the Interior West, USA

Herbivory and advance reproduction influence quaking aspen regeneration response to management in southern Utah, USA

Modeling and predicting vegetation response of western USA grasslands, shrublands, and deserts to climate change (Chapter 1)

Simulation of quaking aspen potential fire behavior in Northern Utah, USA

Tree-ring reconstruction of the level of Great Salt Lake, USA

Statistical treatment for the wet bias in tree-ring chronologies: A case study from the InteriorWest, USA

Climate change vulnerability assessment of forests in the Southwest USA

Functionally relevant climate variables for arid lands: Aclimatic water deficit approach for modelling desert shrub distributions

Geomorphic predictors of riparian vegetation in small mountain watersheds

Snow-covered Landsat time series stacks improve automated disturbance mapping accuracy in forested landscapes

Variation in ant populations with elevation, tree cover, and fire in a pinyon-juniper-dominated watershed

Selection of RAPD markers for investigation of genetic population structure in fusiform rust fungus infecting loblolly pine

Influence of a native legume on soil N and plant response following prescribed fire in sagebrush steppe

Abiotic and biotic influences on Bromus tectoreum invasion and Artemisia tridentata recovery after fire

Drought-driven disturbance history characterizes a southern Rocky Mountain subalpine forest

Using fire regimes to delineate zones in a high-resolution lake sediment record from the western United States

Pages

Chief Financial Officer

Office of the Chief

Business Operations

National Forest System

Research and Development

State and Private Forestry