Treesearch
Search National Treesearch
Displaying 1,021 - 1,030 of 6,855 Publications
- We contribute to addressing two gaps that reduce the utility of ecosystem sciences for decision-making: lack of standard methods for using stakeholders’ knowledge to co-design ecosystem services science research, and absence of commensurable social valuation metrics that allow effective value comparisons. In two phases, we used co-designed instruments to conduct social valuation of biodiversity, and provisioning, cultural and regulating services. First, we conducted eight participatory fora, where experts and non-experts identified ecosystem aspects to which they ascribe value. We combined...AuthorsStanley T. Asah, Dale BlahnaSourceEcosystems. 23(2): 324-337.Year2020
- The South-Central Oregon Adaptation Partnership (SCOAP) was developed to identify climate change issues relevant for resource management on federal lands in south-central Oregon (Deschutes National Forest, Fremont-Winema National Forest, Ochoco National Forest, Crooked River National Grassland, Crater Lake National Park). This science-management partnership assessed the vulnerability of natural resources to climate change and developed adaptation options that minimize negative impacts of climate change and facilitate transition of diverse ecosystems to a warmer climate. The vulnerability...AuthorsJessica Halofsky, David L. Peterson, Joanne J. HoKeywordsSourceGen. Tech. Rep. PNW-GTR-974. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 473 p.Year2019
- Family forest owners own more forestland in the United States than any other group. There have been no national studies of racial and ethnic minority family forest owners in the United States, in spite of increasing attention to diversity in forestry. Using the US Forest Service's National Woodland Owner Survey data, we sought to better understand minority owners by looking at their characteristics, attitudes, and behaviors. Of the over 4 million family forest ownerships with 10+ ac in the United States, minorities comprise 6.6 percent of the ownerships and own 5.1 percent of the 265...AuthorsSarah Butler, John Schelhas, Brett J. ButlerKeywordsSourceJournal of ForestryYear2019
- Diameter distributions and tree-lists provide information about forest stocks disaggregated by size and species and are key for informing forest management. Diameter distributions and tree-lists are multivariate responses, which makes the evaluation of methods for their prediction reliant on the use of dissimilarity metrics to summarize differences between observations and predictions. We compared four strategies for selection of k nearest neighbors (k-NN) methods to predict diameter distributions and tree-lists using LiDAR and stand-level auxiliary data and analyzed the effect of the k-NN...AuthorsFrancisco Mauro, Bryce Frank, Vicente Monleon, Hailemariam Temesgen, Kevin R. FordKeywordsSourceCanadian Journal of Forest Research. 49(7): 775-787.Year2019
- The Forest Inventory and Analysis (FIA) program reports on the status and trends of Washington’s forest resources, producing comprehensive updates every 5 years. This report provides detailed estimates of forest area, tree species composition and distribution, volume, biomass, carbon, standing dead trees and down wood, and understory vegetation on forest land for the state of Washington. It also includes estimates of annual growth, mortality, and removals on forest land. Estimates are based on inventory data collected on 6,112 forested FIA plots in Washington between 2007 and 2016. There...AuthorsMarin Palmer, Olaf Kuegler, Glenn ChristensenKeywordsSourceGen. Tech. Rep. PNW-GTR-976. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 79 p.Year2019
- Advancing phenology is one of the most visible effects of climate change on plant communities, and has been especially pronounced in temperature-limited tundra ecosystems. However, phenological responses have been shown to differ greatly between species, with some species shifting phenology more than others. We analysed a database of 42,689 tundra plant phenological observations to show that warmer temperatures are leading to a contraction of community-level flowering seasons in tundra ecosystems due to a greater advancement in the flowering times of late-flowering species than early-flower...AuthorsJanet S. Prevey, Christian Rixen, Nadja Rüger, Toke T. Høye, Anne D. Bjorkman, Isla H. Myers-Smith, Sarah C. Elmendorf, Isabel W. Ashton, Nicoletta Cannone, Chelsea L. Chisholm, Karin Clark, Elisabeth J. Cooper, Bo Elberling, Anna Maria Fosaa, Greg H. R. Henry, Robert D. Hollister, Ingibjörg Svala Jónsdóttir, Kari Klanderud, Christopher W. Kopp, Esther Lévesque, Marguerite Mauritz, Ulf Molau, Susan M. Natali, Steven F. Oberbauer, Zoe A. Panchen, Eric Post, Sabine B. Rumpf, Niels Martin Schmidt, Edward Schuur, Philipp R. Semenchuk, Jane G. Smith, Katharine N. Suding, Ørjan Totland, Tiffany Troxler, Susanna Venn, Carl-Henrik Wahren, Jeffrey M. Welker, Sonja WipfKeywordsSourceNature Ecology & Evolution. 3(1): 45-52.Year2019
- The Northwest Forest Plan (NWFP) initiated one of the most sweeping changes to forest management in the world, affecting 10 million hectares of federal land. The NWFP is a science-based plan incorporating monitoring and adaptive management and provides a unique opportunity to evaluate the influence of policy. We used >25 years of region-wide bird surveys, forest data, and landownership maps to test this policy’s effect on biodiversity. Clearcutting decreased rapidly, and we expected populations of olderforest– associated birds to stabilize on federal land, but to continue declining on...AuthorsBenjamin T. Phalan, Joseph M. Northrup, Zhiqiang Yang, Robert Deal, Josée S. Rousseau, Thomas Spies, Matthew G. BettsKeywordsSourceProceedings of the National Academy of Sciences. 101: 201813072-.Year2019
- The wood energy landscape is rapidly changing in southeast Alaska. One of the important decisions facing wood energy users is the best choice of wood fuel to use, with options often including wood chips, cordwood, and pellets. However, there are usually tradeoffs depending on the wood energy type selected: wood pellets must often be transported long distances, cordwood systems are relatively labor intensive, and chip-fired systems can often be very expensive. We consider the use of locally produced and engineered fuel chips as a fuel source for small thermal wood energy applications in...AuthorsDavid L. Nicholls, Robert Deering, Thomas R. MilesSourceGen. Tech. Rep. PNW-GTR-965. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 24 p.Year2019
- Most studies of the health benefits of the natural environment use coarse 2D exposure metrics based on the normalized difference vegetation index (NDVI). We compare the performance of these 2D NDVI metrics to finer-resolution 3D metrics derived from Light Detection and Ranging imagery (LiDAR). In logit models of small-for-gestational-age births, both NDVI and LiDAR metrics were associated with a reduced probability of an adverse birth outcome. However, models using LiDAR metrics had higher explanatory power than equivalent NDVI models, and LiDAR models also revealed that vegetation height...AuthorsGeoffrey Donovan, Demetrios Gatziolis, Kristen Jakstis, Saskia ComessKeywordsSourceHealth & Place. 57: 305-312.Year2019
- Background: Several small experimental studies and cross-sectional observational studies have shown that exposure to the natural environment might protect against attention-deficit hyperactivity disorder (ADHD) or moderate the symptoms of ADHD in children. We aimed to assess whether exposure to the natural environment protects against ADHD and whether this hypothesised protective effect varies across a child’s life course. Methods: We did a longitudinal study with data collected from all children born in New Zealand in 1998, excluding those without an address history, those who were not...AuthorsGeoffrey Donovan, Yvonne L Michael, Demetrios Gatziolis, Andrea' t Mannetje, Jeroen DouwesKeywordsSourceLancet Planet Health. 3: e226-e234.Year2019