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Keyword: ponderosa pine

Fire regimes of ponderosa pine (Pinus ponderosa) ecosystems in Colorado: A systematic review and meta-analysis

Publications Posted on: September 26, 2019
Forest management, especially restoration, is informed by understanding the dominant natural disturbance regime. In many western North American forests the keystone disturbance is fire, and much research exists characterizing various fire regime parameters, although often only one or two parameters are addressed in individual studies.

Harvesting forest biomass in the US southern Rocky Mountains: cost and production rates of five ground-based forest operations

Publications Posted on: September 14, 2019
The forests of the southern Rocky Mountains of North America have experienced substantial change since European colonization. High-grade logging, forest grazing practices, and fire suppression have altered once park-like ponderosa pine-dominated ecosystems into dense forests in need of restoration treatments, but such treatments are challenged by the low-value wood products removed during treatment.

Woodpecker nest survival, density, and a pine beetle outbreak

Publications Posted on: August 23, 2019
Mountain pine beetle (Dendroctonus ponderosae) outbreaks in western North American coniferous forests are increasing in size and severity. An understanding of wildlife population responses to pine beetle outbreaks is needed to inform habitat conservation strategies.

Big trees, bark beetles, goshawks, and timber

Science Spotlights Posted on: August 21, 2019
Throughout the Rocky Mountains over the last century, large ponderosa pine trees provided lumber for growing cities and towns, along with fuel and timber for the mining and railroad industries. Most of these forests are now occupied by dense young and mid-aged forests highly susceptible to being killed by bark beetles and burned by wildfires. These conditions have been exacerbated by fire suppression and urban encroachment. As a result, knowledge is needed to inform management actions directed at restoring and conserving ponderosa pine forests. 

Soil fungi recover slowly following high-severity wildfires

Science Spotlights Posted on: August 21, 2019
Soil fungi are important components of the soil microbial community that influence ecosystem resilience and stability after disturbances such as fire. Ectomycorrhizal (EM) fungi increase water and nutrient uptake for their plant hosts in return for carbon. Saprotrophic fungi play an important role in nutrient cycling and are responsible for decomposing wood, plant litter, and soil organic matter. 

Tree and opening spatial patterns vary by tree density in two old-growth remnant ponderosa pine forests in Northern Arizona, USA

Publications Posted on: August 19, 2019
Forest spatial patterns influence many ecological processes in dry conifer forests. Thus, understanding and replicating spatial patterns is critically important in order to make these forests sustainable and more resilient to fire and other disturbances.

Identifying old trees to inform ecological restoration in montane forests of the central Rocky Mountains, USA

Publications Posted on: April 05, 2019
Old trees (defined here as ≥150 years old) can be rare in many forests because of past timber harvest, uncharacteristically severe wildfires, and - increasingly - climate change. Old trees provide unique structural, ecological, scientific, and aesthetic values missing in forests containing only younger trees.

Wildfires and climate change push low-elevation forests across a critical climate threshold for tree regeneration

Publications Posted on: March 21, 2019
Climate change is increasing fire activity in the western United States, which has the potential to accelerate climate-induced shifts in vegetation communities. Wildfire can catalyze vegetation change by killing adult trees that could otherwise persist in climate conditions no longer suitable for seedling establishment and survival.

Managing habitats for white-tailed deer in the Black Hills and Bear Lodge Mountains of South Dakota and Wyoming

Publications Posted on: February 26, 2019
The white-tailed deer is one of the most studied animals in North America, yet much of the available information has been derived in ecosystems different from the Black Hills. The Black Hills are unique in that the dominant species, ponderosa pine, has excellent regenerative abilities.

Ponderosa pine seedling response to planting-site soil fumigation and fungicide application

Documents and Media Posted on: December 07, 2018
Ponderosa pine (Pinus ponderosa Laws.) was used as a biological model to determine the effects of planting site soil fumigation and fungicide applications on stock planted in moderately-fertile soils of the Intermountain West of the United States. Five soil fumigation (Vapam) treatments, singularly and in combination with fungicide (triadimefon) applications, were compared to a control.Document Type: Other Documents