USDA Forest Service

Pacific Northwest Research Station

Pacific Northwest Research Station
1220 SW 3rd Ave.
Portland, OR 97204

(503) 808-2100

US Forest Service

Land and Ecosystem Management



Andrew Youngblood

Ares Adrian

Research Forester
PNW Research Station
LaGrande Forestry Sciences Lab
Contact via email
Phone: (541)962-6530
Fax: (541)962-6504


Statement of Research:

My research is on silviculture and disturbance ecology and centers around three broad topics: (1) enhancing management options for restoring and managing forests and landscapes in the Pacific Northwest; (2) quantifying the consequences of fire and fire surrogate treatments for fuel reduction and forest restoration in fire-prone forests throughout the United States; and (3) enhancing management options for regenerating, restoring, and managing boreal stands and landscapes in Alaska. I also have responsibility for administering facilities and research activities at Pringle Falls Experimental Forest.

Projects and Activities

The national Fire and Fire Surrogate study

Network Map
The national Fire and Fire Surrogate study (FFS) is a comprehensive multidisciplinary experiment designed to evaluate the costs and ecological consequences of alternative fuel reduction treatments in seasonally dry forests of the United States. The FFS has a common experimental design across the 12-site network, with each site a fully replicated experiment that compares four treatments: prescribed fire, mechanical treatments, mechanical + prescribed fire, and an unmanipulated control. (Read more)


Regenerating white spruce in boreal forests of Alaska

The boreal forest is the most extensive forest region in North America. About one-third of Alaska supports boreal forests dominated by Picea glauca (white spruce), Picea mariana (black spruce), Betula neoalaskana (resin birch), Populus balsamifera (balsam poplar), Populus tremuloides (quaking aspen), Larix laricina (tamarack), and, on the Kenai Peninsula, Picea × lutzii (Lutz spruce), a natural hybrid of P. glauca and Picea sitchensis (Sitka spruce). Natural regeneration of white spruce after site disturbance is often inadequate to meet reforestation standards owing to sporadic seed production cycles, rapidly diminishing seed viability after dispersal, and inadequate site conditions for seedling establishment. A series of studies across the boreal forest in Alaska are in place to address seedling stock type, site preparation, and the role of competing vegetation. (Read more)


Reintroducing fire in ponderosa pine forests

Reintroduction Fire
Low elevation ponderosa pine forests east of the crest of the Cascade Range in Oregon and northern California have changed substantially in the last 100 years. There is a critical need to understand ecosystem processes in these forests and the effect of management activities designed to mimic natural disturbances. The degree to which burning mimics historic fires in frequency and severity is not known, nor is the attempt by managers to manipulate stand structure always successful. A long-study in the Metolius Research Natural Area addresses stand dynamics, changes in understory vegetation, and soil properties when fire is reintroduced in old-growth ponderosa pine at different burn frequencies. (Read more)


Forest dynamics after thinning and fuel reduction

Lookout logging
While thinning or prescribed burning are common tools for fuel reduction and restoration in dry forests, there remains uncertainty in the ecological consequences of these treatments. The challenge that now faces resource managers is to integrate knowledge of frequent low- or mixed-severity disturbances such as wildfires and insect attacks with poorly defined shifts in regional climate, to better understand and predict forest structure and composition. A long-term study of stand dynamics is being established in Pringle Falls Experimental Forest to refine management options for restoring resiliency in forest ecosystems. Planned work will evaluate the effects of thinning and fuel reduction treatments on long-term susceptibility to fire, insects, wind, climate change, and their interactions. (Read more)

Pringle Falls Experimental Forest

Keen Old Growth

Experimental forests have a rich legacy of providing information to guide forest management activities. Pringle Falls Experimental Forest, located in central Oregon within the Deschutes National Forest, is one of 81 experimental areas in a national network of experimental forests and ranges. These areas provide opportunities for short- and long-term field research and education in ecosystem structure and function, and demonstration of forest management techniques. Pringle Falls Experimental Forest was formally established in 1931 as a center for silviculture, forest management, and insect and disease research in ponderosa pine forests east of the Oregon Cascade Range. The site was the first experimental forest to be officially established in the Pacific Northwest and was home to some of the earliest forest management and silviculture research in the region. (Read more)







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US Forest Service - Pacific Northwest Research Station
Last Modified: Tuesday,17June2014 at15:06:00CDT

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