Treesearch

The release of contaminants into the environment can occur from anthropogenic activities, such as oil extraction and transportation, mining, and industrial processes. Remediation associated with reducing contaminant concentrations, and restoration that improves animals and supporting habitat, are often needed to restore ecosystems to their pre-release, baseline condition. We demonstrated the application of Bayesian Decision Networks (BDNs) with two Natural Resource Damage Assessment and Restoration (NRDAR) case studies. We use a stylized case study of riparian restoration following the remedia...

There is a global abundance of non-perennial rivers and streams, of which are predicted to increase due to environmental change and anthropogenic influences. However, most modeled representations of streamflow have been constructed with perennial systems in mind, leaving a gap in our understanding and representation of non-perennial systems. To adapt to future challenges, there is a need to determine what modeled representations of low- and no-flow in non-perennial rivers and streams do well and where uncertainties may lie in the internal representations of hydrologic processes. Here we compar...

Large wood (LW) entrainment and transport observations of naturally occurring wood in rivers are critical for understanding wood dynamics. However, they remain limited and sparse, primarily originating from single-site studies. As a result, broader spatial or temporal variability of wood dynamics may not be adequately captured. We compiled a database of tracked, natural pieces of wood from 11 low-order and relatively steep streams in the Chilean Andes, Swiss Alps, United Kingdom and United States. From decades to single-year studies, we gathered 59,739 observations of tracked wood, which all i...

Reforestation practices have potential to alter site productivity and influence forest stand development. We evaluated the effects of logging debris (LD) manipulation (LD dispersed, LD piled, and LD removed) and competing vegetation control (VC; initial VC only or annual VC for five years) on Douglas-fir stand characteristics at two sites in western Washington and Oregon, USA that contrasted strongly in soil quality (SQ). Annual VC had a pronounced effect on stand volume compared to initial VC, but the magnitude of effect was greater at the low SQ site (~50 % increase in volume) than at the hi...

This indicator provides information on the population status of selected forest-associated species that are considered to reflect the genetic diversity present in forest ecosystems. Some forest species support or rely heavily on particular forest structures, patterns, associations, and processes and can therefore be used to describe the status of genetic diversity in forests as a whole.This indicator uses population trends of selected bird and tree species as a surrogate measure of genetic diversity. Population decreases, especially associated with small populations, can lead to decreases in g...

Remotely sensed data play a vital role providing auxiliary variables that can improve precision of sample-based estimates without incurring the substantial cost of increasing sample size. In the setting of design-based inference, model-assisted estimators using generalized regression models provide a practical option to exploit such auxiliary variables to obtain estimates with smaller uncertainties than the Horvitz-Thompson (HT) estimator. Spatial heterogeneity is one of the main characteristics of spatial geographical populations and spatial nonstationarity in regression model parameters can ...

As a forest landowner, you may think about Federal income taxes only when you sell timber. However, many of your forestry activities can have tax implications. Understanding the forest related tax rules and integrating tax planning into your forest management decisions can help increase your after-tax return. New legislation enacted in 2025 reinstates and makes permanent several tax provisions affecting forest landowners and adds new incentives for capital investment. Although many key provisions take effect starting in 2026, some are already effective for the 2025 tax year. This publication p...

Laminated root rot (LRR; caused by the fungus Coniferiporia sulphurascens) is the most damaging root disease of Douglas-fir (Pseudotsuga menziesii) in the Pacific Northwest, USA and southwestern Canada. LRR’s influences on tree mortality and forest productivity have been well-documented in young commercial Douglas-fir forests (

Indicator species can facilitate the assessment, management, and conservation of biodiversity. The White-headed Woodpecker (Leuconotopicus albolarvatus) is a species of conservation concern that is considered an indicator species for mature ponderosa pine ecosystems, a priority restoration habitat that has declined by 90% in the northern Blue Mountains, USA. Here, we employed passive acoustic monitoring at 227 randomly selected locations across two National Forests in the northern Blue Mountains. Autonomous recording units were deployed for an average of 4.41 weeks per station (SD = 1.21) and ...

A ductile lateral force resisting system (LFRS) for mass timber frames is proposed utilizing Mass Timber Buckling- Restrained Braces (MT-BRBs), with mass timber as the primary casing material. Compressive tests were conducted on Mass Plywood Panels (MPP) with and without horizontal self-tapping screws inserted perpendicular to laminations to assess differences in stiffness, peak load, and maximum displacement. Screws perpendicular to lamination enhanced performance, increasing the peak load by nearly four times and peak displacement by more than three times. Withdrawal tests were also performe...