Treesearch
Search National Treesearch
Displaying 211 - 220 of 6,800 Publications
- National forests and grasslands are popular recreation destinations. Providing opportunities for visitors while protecting these natural attractions falls under the scope of recreation planning, but for recreation planners to do their jobs effectively, they need data—information that includes visitor demographics, reasons for visiting, and where visitors are coming from. Increasingly, recreation planners are using real-time visitor data from posts and photos of trip activities posted on crowdsourced platforms, such as social media or citizen or community science projects, to inform...AuthorsAndrea Watts, Sonja KolstoeKeywordsSourceScience Findings 270. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 6 p.Year2024
- Assisted migration provides a potential solution to mitigate the increasing risks of forest maladaptation under climate change. Western larch (Larix occidentalis Nutt.) is a deciduous conifer species undergoing assisted migration beyond its natural range in British Columbia into areas that have become suitable based on climatic niche modelling. We established a seedling common garden experiment in raised beds in a warm location outside the natural range for three growing seasons, with 52 natural populations from across the species range and 28 selectively bred families from British...AuthorsBeth Roskilly, Sally AitkenKeywordsSourceEvolutionary Applications. 17(9): e70001.Year2024
- Transitions between dry and wet hydrologic states are the defining characteristic of non-perennial rivers and streams, which constitute the majority of the global river network. Although past work has focused on stream drying characteristics, there has been less focus on how hydrology, ecology and biogeochemistry respond and interact during stream wetting. Wetting mechanisms are highly variable and can range from dramatic floods and debris flows to gradual saturation by upwelling groundwater. This variation in wetting affects ecological and biogeochemical functions, including nutrient...AuthorsAdam N. Price, Margaret Ann Zimmer, Anna Bergstrom, Amy Jo Burgin, Erin Cedar Seybold, Corey Anne Krabbenhoft, Sam Zipper, Michelle Hope Busch, Walter Kennedy Dodds, Annika Walters, Jane Sarah Rogosch, Rachel Stubbington, Richard Harry Walker, James Christian Stegen, Thibault Datry, Mathis Messager, Julian Olden, Sarah Elizabeth Godsey, Margaret Shanafield, David Lytle, Ryan Burrows, Kendra Elena Kaiser, George Henry Allen, Meryl Christine Mims, Jonathan Douglas Tonkin, Michael Bogan, John Christopher Hammond, Kate Boersma, Allison Nicole Myers-Pigg, Amanda DelVecchia, Daniel Allen, Songyan Yu, Adam WardKeywordsSourceNature Water. 2(9): 815-826.Year2024
- Mount St. Helens National Volcanic Monument was designated by the U.S. Congress in 1982 to conserve the landscape for natural regeneration, scientific research, education, and cultural resource preservation. However, this designation has not eliminated threats from the introduction of non-native species. The non-native New Zealand mud snail (NZMS), Potamopyrgus antipodarum, was first observed in 2016 along the SW shore of Spirit Lake at the foot of Mount St. Helens, despite the lake’s closure to public recreation and isolation from other known sites harboring NZMS. Our study mapped native...AuthorsShaina R. Myers, Hailey E. Germeau, Meghan McCann, Wyatt Cranston, Charles M. Crisafulli, Kena Fox-Dobbs, James E. GawelKeywordsSourceAquatic Invasions. 19(3): 287-307.Year2024
- Uncertainty, complexity, and dynamic changes present challenges for conservation and natural resource management. Evidence-based approaches grounded in reliable information and rigorous analysis can enhance the navigation of the uncertainties and trade-offs inherent in conservation problems. This study highlights the importance of collaborative efforts and evidence-based decision-making, specifically implementing the Resilience-Experimentalist school of adaptive management (RE-ARM), which emphasizes stakeholder involvement, shared understanding, and experimentation. Our goal was to develop...AuthorsMichelle L. Stantial, Auriel M. V Fournier, Abigail J. Lawson, Bruce G. Marcot, Mark S. Woodrey, James E. LyonsKeywordsSourceFrontiers in Conservation Science. 5:1426646.Year2024
- 1. Biological assemblages in streams are influenced by hydrological dynamics, particularly in non-perennial systems. Although there has been increasing attention on how drying impacts stream organisms, few studies have investigated how specific characteristics of drying and subsequent wetting transitions influence biotic responses via resistance and resilience traits. 2. Here, we characterized how hydrologic metrics, including those quantifying drying and wetting transitions as well as dry and wet phases, alter diversity and composition of three aquatic assemblages in non-perennial streams...AuthorsMichelle H. Busch, Kate S. Boersma, Stephen C. Cook, C. Nathan Jones, Chad Loflen, Raphael D. Mazor, Rosalina Stancheva, Adam N. Price, Rachel Stubbington, Margaret A. Zimmer, Daniel C. AllenKeywordsSourceFreshwater Biology. 69(11): 1568-1582.Year2024
- Temperate forests, characterized by cyclical annual climate with distinct seasons, occur in some of the most densely populated regions of the world. Societies depend on these forests to provision ecosystem services such as timber, water, recreation, and cultural resources. However, climate change threatens the health and continued provisioning of the critical services these forests supply. In this chapter, we provide an overview of observed and projected climate change effects on temperate forests, with a focus on disturbance, ecosystem shifts, and ecosystem services. We provide context...AuthorsEmily Fusco, Jessica Halofsky, Matthew Reilly, Holly R. Prendeville, Rita Sousa-SilvaKeywordsSourceIn: McNulty, Steven G. eds. 2024. Future Forests. Elsevier. ISBN 9780323904308. 177-202. Chapter 9.Year2024
- Distributions of both native and invasive species are expected to shift under future climate. Species distribution models (SDMs) are often used to explore future habitats, but sources of uncertainty including novel climate conditions may reduce the reliability of future projections. We explore the potential spread of the invasive annual grass ventenata (Ventenata dubia) in the western United States under both current and future climate scenarios using boosted regression tree models and 30 global climate models (GCMs). We quantify novel climate conditions, prediction variability arising...AuthorsTy C. Nietupski, John B. Kim, Claire Tortorelli, Rebecca Lemons, Becky K. KernsKeywordsSourceEcosphere. 15(9): e4979.Year2024
- Changing climatic conditions are increasing overstory tree mortality in forests globally. This restructuring of the distribution of biomass is making already flammable forests more combustible, posing a major challenge for managing the transition to a lower biomass state. In western US dry conifer forests, tree density resulting from over a century of fire-exclusion practices has increased the risk of high-severity wildfire and susceptibility to climate-driven mortality. Reducing dead fuel loads will require new approaches to mitigate risk to the remaining live trees by preparing forests...AuthorsMatthew Hurteau, Marissa Goodwin, Christopher Marsh, Harold Zald, Brandon Collins, Marc Meyer, Malcolm P. NorthKeywordsSourceFrontiers in Ecology and the Environment. 116: e2801.Year2024
- We examined the interactions between stream water and subsurface sediment to quantify how these interactions influenced organic C respiration and dissolved inorganic C (DIC) production in the hyporheic zone of a high-gradient headwater mountain stream draining a forested catchment at the H. J. Andrews Experimental Forest, Oregon, USA. We compared measurements from a well network with those from six 2-m-long hyporheic mesocosms. The patterns in hyporheic metabolism were similar in wells and mesocosms: O2 declined and DIC increased with travel time. However, the dissolved organic C (DOC)...AuthorsSatish Serchan, Steve Wondzell, Roy Haggerty, Robert Pennington, Kevin Feris, Angelo Sanfilippo, Daniele Tonina, W. Jeffery. ReederKeywordsSourceFreshwater Science. 43(3): 288-306.Year2024