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Environmental, structural, and disturbance influences over forest floor components in interior Douglas-fir forests of the Intermountain West, USA

Downed woody material (DWM) is a key component in forest ecosystems with age, structure, and disturbance described as primary factors that influence DWM dynamics. In particular, much emphasis is placed on large coarse woody debris (CWD). Fine woody debris (FWD) (less than 7.62 cm diameter), duff, and litter also contribute to carbon stocks, provide habitat, add to...

https://www.fs.usda.gov/treesearch/search?keywords=%22USA%29%22&%3Bf%5B0%5D=author_facet%3A%22Manley%2C%20Ph.D.%2C%20Patricia%22&f%5B0%5D=author_facet%3A%22Brashaw%2C%20Brian%22&f%5B1%5D=author_facet%3A%22Giunta%2C%20Andrew%22&f%5B2%5D=author_facet%3A%22Salafsky%2C%20Susan%22&f%5B3%5D=author_facet%3A%22Runyon%2C%20Justin%22&f%5B4%5D=author_facet%3A%22Fenn%2C%20Mark%22&f%5B5%5D=author_facet%3A%22Kotow%2C%20Louren%22&f%5B6%5D=author_facet%3A%22Reeves%2C%20Matt%22

Author(s):

Andrew D. Giunta; John D. Shaw

Year:

2018

Keywords:

coarse woody debris, fine woody debris, interior Douglas-fir, forest inventory analysis, intermountain west, fire, insects

Source:

Forests. 9: 503.

Comparative durability of timber bridges in the USA

As engineers begin to utilize life-cycle-cost design approaches for timber bridges, there is a necessity for more reliable data about their durability and expected service life. This paper summarizes a comprehensive effort to assess the current condition of more than one hundred timber highway bridge superstructures throughout the United States. This national study was...

Author(s):

James P. Wacker; Brian K. Brashaw

Year:

2017

Keywords:

Condition, inspection, bridge, service life, superstructure, durability, preservative

Source:

In: The international research group on wood protection, Section 2, Test methodology and assessment: Paper prepared for the IRG48 Scientific Conference on Wood Protection. Ghent, Belgium: 1-12.

Using epiphytic lichens to monitor nitrogen deposition near natural gas drilling operations in the Wind River Range, WY, USA

Rapid expansion of natural gas drilling in Sublette County, WY (1999-present), has raised concerns about the potential ecological effects of enhanced atmospheric nitrogen (N) deposition to the Wind River Range (WRR) including the Class I BridgerWilderness. We sampled annual throughfall (TF) N deposition and lichen thalli N concentrations under forest canopies in four...

Author(s):

Jill A. McMurray; Dave W. Roberts; Mark E. Fenn; Linda H. Geiser; Sarah Jovan

Year:

2013

Keywords:

oil and gas development, lichens, throughfall nitrogen deposition, critical loads, monitoring, wilderness

Source:

Water, Air, and Soil Pollution. 224(3): 1487.

A municipal forest report card: Results for California, USA

This study integrates two existing computer programs, the Pest Vulnerability Matrix and i-Tree Streets, into a decision-support tool for assessing municipal forest stability and recommending strategies to mitigate risk of loss. A report card concept was developed to communicate levels of performance in terms that managers and the public easily understand. Grades were...

Author(s):

E.Gregory McPherson; Louren Kotow

Year:

2013

Keywords:

Age structure, Pests, Species dominance, Species adaptability, Stability, Species diversity

Source:

Urban Forestry & Urban Greening. 12: 134-143

Atmospheric deposition of nitrogen and sulfur and preferential canopy consumption of nitrate in forests of the Pacific Northwest, USA

Wet,dry and throughfall deposition of N and S were measured for 2 years in three national parks in Washington State:Olympic,Mount Rainier,and North Cascades.Throughfall was measured using ion exchange resin (IER) collectors. A major objective of the study was to evaluate the effectiveness of IER throughfall measurements for monitoring deposition inputs,including...

Author(s):

Mark E. Fenn; Christopher S. Ross; Susan L. Schilling; William D. Baccus; Michael A. Larrabee; Rebecca A. Lofgren

Year:

2013

Keywords:

Nitrogen deposition, Pacific Northwest forests, Canopy uptake, Throughfall, Passive monitoring, Ion exchange resin collectors

Source:

For. Ecol. Manage. 302: 240-253

Two new species of Hurleyella Runyon and Robinson (Diptera: Dolichopodidae), with the first record from the Neotropics

Two new species of the long-legged fly genus Hurleyella Runyon & Robinson, 2010 are described and illustrated: Hurleyella belizensis sp. nov. from Belize and Hurleyella salina sp. nov. from alkali areas of the Northern Rockies of the USA (Idaho, Montana, Wyoming). The discovery of these new species greatly extends the known distribution of Hurleyella northward...

Author(s):

Justin B. Runyon

Year:

2019

Keywords:

Rocky Mountains, Belize, long-legged flies, Dolichopodidae, Medeterinae, micro-dolichopodids, Hurleyella, Microchrysotus, Micromedetera, Neotropics, Nearctic

Source:

Zootaxa. 4568: 548-560.

Spatial patterns of atmospheric deposition of nitrogen and sulfur using ion-exchange resin collectors in Rocky Mountain National Park, USA

Lakes and streams in Class 1 wilderness areas in the western United States (U.S.) are at risk from atmospheric deposition of nitrogen (N) and sulfur (S), and protection of these resources is mandated under the Federal Clean Air Act and amendments. Assessment of critical loads, which are the maximum exposure to pollution an area can receive without adverse effects on...

Author(s):

David W. Clow; Heidi A. Roop; Leora Nanus; Mark E. Fenn; Graham A. Sexstone

Year:

2015

Keywords:

Nitrogen, Sulfur, Deposition, Isotopes, Ion-exchange, Park

Source:

Atmospheric Environment. 101: 149-157

Mountain pine beetle attack alters the chemistry and flammability of lodgepole pine foliage

During periods with epidemic mountain pine beetle (Dendroctonus ponderosae Hopkins) populations in lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) forests, large amounts of tree foliage are thought to undergo changes in moisture content and chemistry brought about by tree decline and death. However, many of the presumed changes have yet to be...

Author(s):

Wesley G. Page; Michael J. Jenkins; Justin B. Runyon

Year:

2012

Keywords:

mountain pine beetle, Dendroctonus ponderosae, lodgepole pine, Pinus contorta

Source:

Canadian Journal of Forest Research. 42: 1631-1647.

Bulk deposition of base cationic nutrients in China's forests: Annual rates and spatial characteristics

Base cations, such as potassium (K⁺), calcium (Ca²⁺) and magnesium (Mg²⁺), are essential nutrients for plant growth and their atmospheric inputs can buffer the effect of acid deposition by nitrogen (N) and sulphur (S) compounds. However, the spatial variation in atmospheric deposition of these base...

Author(s):

Enzai Du; Wim de Vries; Steven McNulty; Mark E. Fenn

Year:

2018

Keywords:

Base cation, Bulk deposition, Nutrient cycling, Acid deposition, Forest ecosystem

Source:

Atmospheric Environment

Reproductive responses of northern goshawks to variable prey populations

Developing comprehensive conservation strategies requires knowledge of factors influencing population growth and persistence. Although variable prey resources are often associated with fluctuations in raptor demographic parameters, the mechanisms of food limitation are poorly understood, especially for a generalist predator like the northern goshawk (Accipiter...

Author(s):

Susan R. Salafsky; Richard T. Reynolds; Barry R. Noon; John A. Wiens

Year:

2007

Keywords:

Accipiter gentilis, Arizona, distance sampling, habitat, northern goshawk, predator-prey relationships, prey abundance, red squirrel, reproduction

Source:

Journal of Wildlife Management. 71(7): 2274-2283.

The release and recovery of Bradyrrhoa gilveolella on rush skeletonweed in southern Idaho

Rush skeletonweed (Chondrilla juncea L.) is a major noxious weed in Idaho and other areas of the Pacific Northwest. A biological control program was implemented during the late 1970s in an attempt to manage infestations of rush skeletonweed and to limit its spread into new areas. Three agents, Cystiphora schmidti (Rübsaamen) (a gall midge), Aceria chondrillae (...

Author(s):

J. L. Littlefield; G. Markin; J. Kashefi; A. de Meij; J. Runyon

Year:

2013

Keywords:

rush skeletonweed, Chondrilla juncea, noxious weed

Source:

In: Wu, Yun; Johnson, Tracy; Sing, Sharlene; Raghu, S.; Wheeler, Greg; Pratt, Paul; Warner, Keith; Center, Ted; Goolsby, John; Reardon, Richard, eds. Proceedings of the XIII International Symposium on Biological Control of Weeds; September 11-16, 2011; Waikoloa, Hawaii, USA. Session 9: Post-release Evaluation and Management. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Forest Health Technology Enterprise Team. Online: http://www.invasive.org/proceedings/pdfs/Littlefield%20-%

Vulnerability of grazing and confined livestock in the Northern Great Plains to projected mid- and late-twenty-first century climate

The Northern Great Plains (NGP) region of the USA - which comprises Montana, Wyoming, Colorado, North Dakota, South Dakota, and Nebraska - is a largely rural area that provides numerous ecosystem services, including livestock products, cultural services, and conservation of biological diversity. The region contains 25% of the Nation's beef cattle and approximately...

Author(s):

Justin Derner; David Briske; Matt Reeves; Tami Brown-Brandl; Miranda Meehan; Dana Blumenthal; William Travis; David Augustine; Hailey Wilmer; Derek Scasta; John Hendrickson; Jerry Volesky; Laura Edwards; Dannele Peck

Year:

2017

Keywords:

grazing, livestock, the Northern Great Plains (NGP), vulnerability, climatic changes

Source:

Climatic Change. doi: 10.1007/s10584-017-2029-6.

Total Publications in Treesearch: 53,228

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Environmental, structural, and disturbance influences over forest floor components in interior Douglas-fir forests of the Intermountain West, USA

Comparative durability of timber bridges in the USA

Using epiphytic lichens to monitor nitrogen deposition near natural gas drilling operations in the Wind River Range, WY, USA

A municipal forest report card: Results for California, USA

Atmospheric deposition of nitrogen and sulfur and preferential canopy consumption of nitrate in forests of the Pacific Northwest, USA

Two new species of Hurleyella Runyon and Robinson (Diptera: Dolichopodidae), with the first record from the Neotropics

Spatial patterns of atmospheric deposition of nitrogen and sulfur using ion-exchange resin collectors in Rocky Mountain National Park, USA

Mountain pine beetle attack alters the chemistry and flammability of lodgepole pine foliage

Bulk deposition of base cationic nutrients in China's forests: Annual rates and spatial characteristics

Reproductive responses of northern goshawks to variable prey populations

The release and recovery of Bradyrrhoa gilveolella on rush skeletonweed in southern Idaho

Vulnerability of grazing and confined livestock in the Northern Great Plains to projected mid- and late-twenty-first century climate

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