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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of Study findings showed the Ovenbird (Seiurus aurocapilla) had significantly increasing numbers since 1995 in three National Forests: Chippewa, Superior and Chequamegon-Nicolet.  In addition, the Ovenbird and Red-eyed Vireo were the two most abundantly recorded species in the Chippewa and Chequamegon-Nicolet National Forests. Common species such as the Ovenbird tended to occur in many forest cover types, but most commonly in upland hardwood forests. Jon Swanson
ID: 644
Bird Monitoring in the Western Great Lakes National Forests Shows Stabilized Breeding Bird Populations

The results from 20 years of forest bird monitoring in four national forests in Minnesota and Wisconsin show positive trends in breeding bird po ...

Principal Investigator : Brian R. Sturtevant

Wildlife and Fish2014NRS
Photo of The Border Lakes Ecoregion contains (top) has starkly different land management histories separated by political boundaries.  Divergent land management histories created differences in landscape patterns of spruce budworm host (i.e., spruce and fir) that were mapped using remote sensing.  Spruce budworm disturbance histories reconstructed via tree-ring analyses across this study area include a range of outbreak frequencies and intensities (lower left, where position roughly corresponds to geographic location).  The greatest variation in the time-series of outbreak patterns were explained by forest configuration, followed by forest proportion, and then the variance shared by these two variables, while climate accounted for comparatively little variation (lower left). USDA Forest Service
ID: 886
Changes in Host Abundance Following Harvesting Desynchronize Forest Insect Pest Outbreaks

A Forest Service scientist led an international team to investigate how different historic forest management practices have affected spruce budw ...

Principal Investigator : Brian R. Sturtevant

Resource Management and Use2015NRS
Photo of Figure 1. Isle Royale National Park (upper left) is home to populations of wolves and moose (upper right, data from Vucetich and Peterson 2015). Simulated trends (+/- 90 percent confidence intervals) in moose population density (lower left), and available forage biomass/moose carrying capacity (lower right) for the three predation scenarios. Actual moose population estimates for Isle Royale from 2006-2015 (black) are provided for reference.
Figure 2. Simulated changes in forest types at Isle Royale after 100 years of no predation vs strong predation rates.
ID: 1252
Modeling wolf-moose forest interactions at Isle Royale National Park

The loss of top predators may have unintended consequences for forest composition and function. Forest Service scientists partnered with the U.S ...

Principal Investigator : Brian R. Sturtevant

Wildlife and Fish2017NRS
Photo of Figure 1. Contrasts of fire severity (light: a,b; severe (severe: c, d) for the Pagami Creek Fire. Remotely-sensed estimates of fire
severity such as the relative difference normalized burn ratio (RdNBR) are most strongly related to tree impacts. Loss of C, N, and Hg
from the forest floor were most strongly related to soil burn severity indices measured at the point of sampling, where the sampling
ring in b & d are 30 cm in diameter. Brian Sturtevant, U.S. Department of Agriculture Forest Service.
ID: 1168
Scaling Up Ecosystem Impacts of the Pagami Creek Fire in Northern Minnesota

Quantifying fire severity is critical to understanding the ecosystem impacts of wildfire. Forest Service research demonstrates the magnitude of ...

Principal Investigator : Brian R. Sturtevant

Wildland Fire and Fuels
Water, Air, and Soil
Photo of
ID: 1202
Scientists model the effects of restoring the American chestnut tree to the eastern U.S. landscape

The American chestnut tree is fast growing, somewhat tolerant of shade, and its wood is resistant to decay. The chestnut tree might be capable o ...

Principal Investigator : Brian R. Sturtevant

Photo of Aerial view of the Aspen FACE experiment showing the control facilities (middle left), and the 12 atmospheric treatment rings of four treatments with three replicates.  In the ring at bottom center, the different model forest communities are visible. David F. Karnosky, Michigan Tech University.
ID: 463
Scientists Predict Survivability Factors for Northern Forests Given Elevated CO2 and Ozone Levels

The researchers scaled up a high-profile 11-year ecosystem experiment called Aspen-FACE to assess how elevated carbon dioxide and ozone levels m ...

Principal Investigator : Brian R. Sturtevant

Resource Management and Use
Water, Air, and Soil
Photo of Book cover
ID: 880
Simulation Modeling of Forest Landscape Disturbances

Simulation models of landscape disturbances have proliferated and matured. A Forest Service scientist co-edited the book “Simulation Modeling ...

Principal Investigator : Brian R. Sturtevant

Resource Management and Use2015NRS
Photo of Spruce and fir increase the vertical connectivity of live fuels, enhancing potential for crown-fire activity. Brian Sturtevant , Forest Service
ID: 62
Spruce Budworm Effects on Fire Risk and Vegetation in the Boundary Waters Canoe Area Wilderness

Insect-killed trees do not necessarily increase fire risk

Principal Investigator : Brian R. Sturtevant

Wildland Fire and Fuels2012NRS