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Keyword: nitrogen

Lichen elemental indicators for air pollution in Eastern United States forests; a pilot study in the upper Midwest

Publications Posted on: April 07, 2020
Five lichen species were evaluated as element-content pollution bioindicators for a pilot study in Wisconsin and adjacent U.S. states, using data for 20 elements. Goodquality elemental data for aluminum, cobalt, chromium, copper, iron, nitrogen, and sulfur—mostly from nonspecialist U.S.

Effect of forest thinning and wood quality on the short-term wood decomposition rate in a Pinus tabuliformis plantation

Publications Posted on: December 07, 2018
The effects of forest thinning and wood quality on wood decomposition in the mineral soil were investigated in a Chinese pine (Pinus tabuliformis Carriére) plantation in northern China by measuring mass loss and changes in wood properties (carbohydrates, lignin and nitrogen (N) concentrations) in wood stakes of two tree species - loblolly pine (Pinus taeda L.) and trembling aspen (Populus tremuloides Michx.).

Long-term effects of prescribed underburning on litter decomposition and nutrient release in ponderosa pine stands in central Oregon

Documents and Media Posted on: October 03, 2018
The effects of low-intensity prescribed underburning on the rates of litter decomposition and N and P release in ponderosa pine (Pinus ponderosa Dougl. ex. Laws) stands were studied by a litter-bag technique for 18 months in sites burned 0.3, 5, or 12 years earlier.Document Type: Other Documents

The legacy of severe wildfire on stream water quality

FS News Posted on: September 25, 2018
Do severe wildfires impact rivers and reservoirs years after they burn? In Colorado, at the site of the 2002 Hayman Fire, a new study found that watersheds with extensive high-severity wildfire still contained elevated levels of streamwater nitrogen. While elevated nitrogen and carbon in burned watersheds are not a threat to drinking water quality, they do exceed expected levels for healthy streams in this area. 

Characteristics of masticated particles in mixed-conifer forests of the western United States: Chemistry, heat content, and mineral percentage results

Datasets Posted on: March 15, 2018
This data publication contains the results of chemical and mineral analyses on masticated particles from mixed-conifer forests in 15 study locations. These data were collected from 2012 through 2016 as part of the MASTIDON project.

Severe bark beetle outbreaks have minor impacts on stream nutrients

FS News Posted on: September 19, 2016
New research based on 30 years of streamwater data points to the vital role of new plant growth in absorbing nutrients after forest disturbances. Scientists found that at the Fraser Experimental Forest in Colorado, even though water and nutrient uptake ceases rapidly after beetles attack pine trees, streamwater nitrogen levels remained low in beetle-infested watersheds.

Does clear-cut harvesting accelerate initial wood decomposition? A five-year study with standard wood material

Publications Posted on: June 07, 2016
Coarse woody debris (CWD) serves a variety of ecological functions in forests, and the understanding of its decomposition is needed for estimating changes in CWD-dependent forest biodiversity, and for the quantification of forest ecosystem carbon and nutrient pools and fluxes.

Controlled release fertilizer improves quality of container longleaf pine seedlings

Publications Posted on: May 12, 2016
In an operational trial, increasing the amount of nitrogen (N) applied to container longleaf pine seedlings by incorporating controlled release fertilizer (CRF) into the media improved seedling growth and quality.

Future forests webinar series

Events Posted on: March 15, 2016
The Future Forests Webinar Series facilitated dialogue between scientists and managers about the challenges and opportunities created by the mountain pine beetle (MPB) epidemic. The series consisted of six webinar facilitated by the USFS Rocky Mountain Research Station, the Northern and Rocky Mountain Regions, and the Colorado Forest Restoration Institute.

Mastication effects on fuels, plants, and soils in four western U.S. ecosystems

Documents and Media Posted on: January 29, 2016
This project compared fuel reduction mulching and adjacent untreated stands at conifer ecosystems distributed across Colorado and evaluated the effects of mulch depth both experimentally and in operational units. Results from this study provide land managers and researchers greater understanding of the lasting effects of mulching on community and ecosystem processes. Document Type: Other Documents