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- Data from tree cores and disks were used to develop biomass and carbon mass taper models for five major Sierra Nevada conifer species. These taper models were used to predict masses of tree boles, tree bole portions, branch, and foliage using carbon fraction data for oven-dried and living tissues. Taper models developed using core data were well modeled to disk data with R2 values ranging from 0.98 to 0.99 by inclusion of a calibration parameter. The fit of the final models suggests our approach can be used to include large diameter trees that cannot be cut down in biomass data collection effo...AuthorsDryw A. Jones, Kevin L. O'HaraKeywordsSourceCanadian Journal of Forest Research. 54(2): 192-206.Year2024
- While there has been extensive research on resident sentiment towards tourism, few have explored the uniqueness of gateway communities and their relationship to the Protected Areas (PA) surrounding them. This study explores how resident trust of PA managers and support for PAs surrounding their community can spillover to explain additional variance in resident support or opposition to tourism. To test this, traditional antecedents to resident support for tourism, like psychological, social, and political empowerment and the economic benefits from tourism, were modeled independently and in tand...AuthorsChase Perren, B. Bynum Boley, Eric M. White, Gary T. Green, Kyle M. WoosnamKeywordsSourceJournal of Sustainable Tourism. 2(2): 1-21.Year2024
- Background - Declines in biodiversity and ecosystem health due to climate change are raising urgent concerns. In response, large-scale multispecies monitoring programmes are being implemented that increasingly adopt sensor-based approaches such as acoustic recording. These approaches rely heavily on ecological data science. However, developing reliable algorithms for processing sensor-based data relies heavily on labelled datasets of sufficient quality and quantity. We present a dataset of 1,575 dawn chorus soundscape recordings, 141 being fully annotated (n = 32,994 annotations) with avian, m...AuthorsMatthew James Weldy, Tom Denton, Abram B. Fleishman, Jaclyn Tolchin, Matthew McKown, Robert S. Spaan, Zachary J. Ruff, Julianna M. A. Jenkins, Matthew G. Betts, Damon B. LesmeisterKeywordsSourceBiodiversity Data Journal. 12(241): e118315.Year2024
- Fire suppression has increased competitive tree encroachment of Oregon white oak (Quercus garryanna Douglas ex Hook) ecosystems, threatening maintenance of this important species. Restoration of oak ecosystems is ideal to address this threat but not always possible, giving rise to a need for novel treatments that will allow oak to persist on an altered landscape. We tested the effect of three release treatments centered around individual Oregon oak trees within four forested sites that had developed following encroachment and overtopping by Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco var...AuthorsRobert A. Slesak, Leslie C. Brodie, Constance A. HarringtonKeywordsSourceRestoration Ecology. 32(4): e14130.Year2024
- Elevation, soil composition, and depressions can influence the distribution of water belowground and its availability to tree roots. During the summer months when precipitation levels are at their lowest, this belowground soil moisture can stave off the effects of drought stress on trees. Although lack of soil moisture is the most well-known driver of drought stress, it may not be the only driver. Working in the H.J. Andrews Experimental Forest in western Oregon, researchers investigated whether a lack of soil moisture or warm dry air is the primary cause of the drought stress exhibited by tr...AuthorsAndrea Watts, Steve Wondzell, Karla Jarecke, Kevin BladonKeywordsSourceScience Findings 268. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 6 p.Year2024
- Objective: Managers can modify river flow regimes using fish monitoring data to minimize impacts from water management infrastructure. For example, operation of the gate-controlled Delta Cross Channel (DCC) in California can negatively affect the endangered Sacramento River winter-run Chinook Salmon Oncorhynchus tshawytscha. Although guidelines have been developed for DCC operations by using real-time juvenile fish sampling count data, there is uncertainty about how environmental conditions influence fish occupancy and the extent to which those relationships are affected by sampling and identi...AuthorsJoseph E. Kirsch, James T. Peterson, Adam Duarte, Denise Goodman, Andrew Goodman, Sara Hugentobler, Mariah Meek, Russell W. Perry, Corey Phillis, Lori Smith, Jeffrey StuartKeywordsSourceNorth American Journal of Fisheries Management. 44(2): 335-358.Year2024
- Sturgeons are among the most endangered fishes in the world. Identifying habitat use characteristics to inform restoration projects is crucial for recovery. However, small sample sizes, inadequate replication of studies, and limited spatial extents complicate our ability to effectively apply the findings of single studies to endangered species conservation across the larger riverscape. We synthesized information from amphidromous and anadromous sturgeons in North America to identify species-specific knowledge gaps and conduct a quantitative comparison of species–habitat relationships. We provi...AuthorsErin K. Gilligan-Lunda, Adam Duarte, James T. PetersonKeywordsSourceCanadian Journal of Fisheries and Aquatic Sciences. 81(5): 508-524.Year2024
- Population monitoring is an essential component of biodiversity conservation and management, but low detection probabilities for rare and/or cryptic species makes estimating abundance and occupancy challenging. Passive acoustic monitoring combined with machine learning algorithms represents a potential path forward to effectively and efficiently monitor the occurrence of rare vocalizing species across entire forest landscapes. Our objectives were to develop and implement a convolutional neural network (PNW-Cnet) to identify vocalizations of a rare and threatened forest nesting bird species – t...AuthorsAdam Duarte, Matthew J. Weldy, Damon B. Lesmeister, Zachary J. Ruff, Julianna M.A. Jenkins, Jonathon J. Valente, Matthew G. BettsKeywordsSourceEcological Indicators. 162: 112016.Year2024
Fuel types misrepresent forest structure and composition in interior British Columbia: a way forward
Background - A clear understanding of the connectivity, structure, and composition of wildland fuels is essential for effective wildfire management. However, fuel typing and mapping are challenging owing to a broad diversity of fuel conditions and their spatial and temporal heterogeneity. In Canada, fuel types and potential fire behavior are characterized using the Fire Behavior Prediction (FBP) System, which uses an association approach to categorize vegetation into 16 fuel types based on stand structure and composition. In British Columbia (BC), provincial and national FBP System fuel type m...AuthorsJennifer N. Baron, Paul F. Hessburg, Marc-André Parisien, Gregory A. Greene, Sarah E. Gergel, Lori D. DanielsKeywordsSourceFire Ecology. 20:15.Year2024- A growing body of evidence shows that nature-based therapy can help reduce stress and trauma symptoms. In recent years, the number of outdoor programs for veterans who experience post-traumatic stress has grown. These programs engage with public lands—both practically and symbolically—to create opportunities for transformative personal and professional experiences for veterans. Yet, there is little understanding about the diverse social, therapeutic, geographic, and activity dimensions of these programs on public lands, or how they are coordinated within and across agencies. To shed light on ...AuthorsSylvia Kantor, Lee Cerveny, Monika DerrienKeywordsSourceScience Findings 267. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 6 p.Year2024