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Keyword: thinning

Thinning and prescribed fire effects on overstory tree and snag structure in dry coniferous forests of the interior Pacific Northwest

Publications Posted on: April 07, 2010
Forest thinning and prescribed fires are practices used by managers to address concerns over ecosystem degradation and severe wildland fire potential in dry forests. There is some debate, however, about treatment effectiveness in meeting management objectives as well as their ecological consequences.

Effects of thinning and fertilizing on production of western white pine seed

Publications Posted on: March 23, 2010
In a 40-year-old western white pine plantation developed as a seed production area, heavy thinning and application of fertilizer in the fall significantly increased strobilus production the following spring. Applying fertilizer increased seed weight and cone length significantly, but thinning did not. Insects severely damaged the cone crop in the thinned stand.

Maintaining soil productivity during forest or biomass-to-energy thinning harvests in the western United States

Publications Posted on: January 27, 2010
Forest biomass thinnings, to promote forest health or for energy production, can potentially impact the soil resource by altering soil physical, chemical, and/or biological properties. The extent and degree of impacts within a harvest unit or across a watershed will subsequently determine if site or soil productivity is affected.

Small-scale response in an avian community to a large-scale thinning project in the southwestern United States

Publications Posted on: January 26, 2010
Avian populations were monitored using point counts from 2002 to 2007, two years before and four years after a 2800 ha fuel reduction project. The study area was within a ponderosa pine forest near Santa Fe, New Mexico, USA. Adjacent unthinned areas were also monitored as a reference for population variation related to other factors.

Response of small mammal populations to fuel treatment and precipitation in a ponderosa pine forest, New Mexico

Publications Posted on: October 19, 2009
Mechanical and fire treatments are commonly used to reduce fuels where land use practices have encouraged accumulation of woody debris and high densities of trees. Treatments focus on restoration of vegetation structure, but will also affect wildlife populations. Small mammal populations were monitored before and after dense tree stands were thinned on 2,800 ha in NM, U.S.A.

Understory vegetation response to thinning and burning restoration treatments in dry conifer forests of the eastern Cascades, USA

Publications Posted on: July 09, 2009
Restoration/fuel reduction treatments are being widely used in fire-prone forests to modify stand structure, reduce risks of severe wildfire, and increase ecosystem resilience to natural disturbances. These treatments are designed to manipulate stand structure and fuels, but may also affect understory vegetation and biodiversity.

The role of disturbance severity and canopy closure on standing crop of understory plant species in ponderosa pine stands in northern Arizona, USA

Publications Posted on: March 19, 2009
Concerns about the long-term sustainability of overstocked dry conifer forests in western North America have provided impetus for treatments designed to enhance their productivity and native biodiversity.

A fuel treatment reduces fire severity and increases suppression efficiency in a mixed conifer forest

Publications Posted on: December 17, 2008
Fuel treatments are being implemented on public and private lands across the western United States. Although scientists and managers have an understanding of how fuel treatments can modify potential fire behaviour under modelled conditions, there is limited information on how treatments perform under real wildfire conditions in Sierran mixed conifer forests. The Bell Fire started on 22 September 2005 on the Plumas National Forest, CA.

Managing Gambel oak in southwestern ponderosa pine forests: the status of our knowledge

Publications Posted on: November 25, 2008
Gambel oak (Quercus gambelii) is a key deciduous species in southwestern ponderosa pine (Pinus ponderosa) forests and is important for wildlife habitat, soil processes, and human values.

Selected yield tables for plantations and natural stands in Inland Northwest Forests

Publications Posted on: November 05, 2007
Yields arrayed by site index and age have been tabulated for plantations of 500 trees per acre, with five thinning regimes, for Douglas-fir, grand fir, and western larch. Yields were also tabulated for naturally regenerated stands of the grand fir-cedar-hemlock ecosystem of the Inland Empire. All yields were estimated with the Prognosis Model for Stand Development, version 5.2, including the Regeneration Establishment Model.

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