Treesearch

Camera or genetic data are increasingly used to estimate wildlife abundance and density. We integrated video camera data with genetic data over 7 years to estimate annual age-structured apparent survival of American black bears (Ursus americanus). We identified 70 individuals through meticulous scrutiny of 7531 video captures, cross-referenced with 721 genetic captures from hair samples concurrently collected from stations in view of cameras. We used the Cormack-Jolly-Seber model in Program Mark to estimate annual age-structured apparent survival for yearling males, yearling females, 2+...

LANDFIRE assigns disturbance, vegetation, fuel, and fire regime classifications to every pixel within every 30 meters of land in the United States. A good example of these methods is the process of assigning a pixel to an ecological system or to a U.S. National Vegetation Classification group, LANDFIRE’s two vegetation type classifications. LANDFIRE uses the relation between satellite image surface reflectance and field plots to extrapolate vegetation classes to other pixels containing similar information. The satellite reflectance data come primarily from 30-meter Landsat sensors and...

Layers of cellulose nanofibers (CNF) have great potential to be used in food packaging applications because of their oxygen and grease barrier properties. However, because of their sensitivity to moisture, they likely will need to be used in a layered structure with water vapor barrier layers. Waterborne barrier coatings (WBBC) have the potential to provide this water vapor barrier, but their performance on paper with a CNF layer has not been described in the literature. Paper that had a CNF layer was coated with three different WBBC with various levels of two different barrier pigments to...

This resource update is a brief look at some of the basic metrics that describe the status of and changes to forest resources in Wisconsin. This information is based on field data collected using the USDA Forest Service Forest Inventory and Analysis (FIA) annualized sample design, and it is updated yearly. Tables for Forests of Wisconsin, 2021 can be found at https://doi.org/10.2737/FS-RU-364-Tables. The FIA one-click application that generated this report can be found at https://doi.org/10.2737/FIA-One-Click-State-Report-v1.2.

This resource update is a brief look at some of the basic metrics that describe the status of and changes to forest resources in Vermont. This information is based on field data collected using the USDA Forest Service Forest Inventory and Analysis (FIA) annualized sample design, and it is updated yearly. Tables for Forests of Vermont, 2021 can be found at https://doi.org/10.2737/FS-RU-373-Tables. The FIA one-click application that generated this report can be found at https://doi.org/10.2737/FIA-One-Click-State-Report-v1.2.

This resource update is a brief look at some of the basic metrics that describe the status of and changes to forest resources in West Virginia. This information is based on field data collected using the USDA Forest Service Forest Inventory and Analysis (FIA) annualized sample design, and it is updated yearly. Tables for Forests of West Virginia, 2021 can be found at https://doi.org/10.2737/FS-RU-375-Tables. The FIA one-click application that generated this report can be found at https://doi.org/10.2737/FIA-One-Click-State-Report-v1.2.

This resource update is a brief look at some of the basic metrics that describe the status of and changes to forest resources in Pennsylvania. This information is based on field data collected using the USDA Forest Service Forest Inventory and Analysis (FIA) annualized sample design, and it is updated yearly. Tables for Forests of Pennsylvania, 2021 can be found at https://doi.org/10.2737/FS-RU-381-Tables. The FIA one-click application that generated this report can be found at https://doi.org/10.2737/FIA-One-Click-State-Report-v1.2.

Cycling of carbon (C), nitrogen (N), calcium (Ca), phosphorus (P), and sulfur (S) is an important ecosystem service that forest soils provide. Humans influence these biogeochemical processes through the deposition of atmospheric pollutants and site disturbances. One way to study these potential anthropogenic trajectories is through long-term monitoring in association with human-caused environmental gradients such as urban-rural gradients. The objective of this study was to characterize changes in surface soil chemistry of urban, suburban and rural forest patches in the Baltimore Metropolita...

Active forest management is applied in many parts of the western United States to reduce wildfire severity, mitigate vulnerability to drought and bark beetle mortality, and more recently, to increase snow retention and late-season streamflow. A rapidly warming climate accelerates the need for these restorative treatments, but the treatment priority among forest patches varies considerably. We simulated four treatment scenarios across the 3,450 km2 Wenatchee River basin in eastern Washington, United States. We used a decision support tool (DST) to assess trade-offs and synergies within and...

Forest biological disturbance agents (BDAs) are insects, pathogens, and parasitic plants that affect tree decline, mortality, and forest ecosystems processes. BDAs are commonly thought to increase the likelihood and severity of fire by converting live standing trees to more flammable, dead and downed fuel. However, recent research indicates that BDAs do not necessarily increase, and can reduce, the likelihood or severity of fire. This has led to confusion regarding the role of BDAs in influencing fuels and fire in fire-prone western United States forests. Here, we review the existing...