Treesearch
Displaying 4,951 - 4,960 of 64,691 Publications- Emerald ash borer (EAB) (Agrilus planipennis), non-native shrubs, and white-tailed deer (Odocoileus virginianus) have been independently shown to affect woody seedling communities. Our objective was to determine the relative importance as well as additive and interactive-effects of these stressors in the context of two environmental factors, canopy tree competition and site wetness. We sampled 24 sites, representing three natural noncongruent gradients in ash mortality, deer browse, and introduced shrub invasion. We explored the responses of seedling species abundance, diversity and...AuthorsBrian M. Hoven, Kathleen Knight, Valerie E. Peters, David L. GorchovKeywordsSourceForest Ecology and ManagementYear2022
- North American ratsnakes (Pantherophis spp.) are regionally important predators whose behavior has previously been linked to habitat fragmentation and climate change. Ratsnakes are hypothesized to benefit from fragmentation that creates favorable microclimates, but previous studies have produced inconsistent results, potentially reflecting geographic variation or study design limitations. We used radiotelemetry and kernel-based home range estimators to evaluate the seasonal movements and habitat use of 53 Western Ratsnakes (Pantherophis obsoletus) in central Missouri, USA. Snakes frequently...AuthorsAndrew D. George, Frank R. Thompson, John FaaborgKeywordsSourceHerpetological Conservation and Biology. 17(2): 306–315.Year2022
- Overwintering success is an important determinant of arthropod populations that must be considered as climate change continues to influence the spatiotemporal population dynamics of agricultural pests. Using a long-term monitoring database and biologically relevant overwintering zones, we modeled the annual and seasonal population dynamics of a common pest, Helicoverpa zea (Boddie), based on three overwintering suitability zones throughout North America using four decades of soil temperatures: the southern range (able to persist through winter), transitional zone (uncertain overwintering...AuthorsDouglas Lawton, Anders S. Huseth, George G. Kennedy, Amy C. Morey, William D. Hutchison, Dominic D. Reisig, Seth J. Dorman, DeShae Dillard, Robert C. Venette, Russell L. Groves, John J. Adamczyk, Izailda Barbosa Dos Santos, Tracey Baute, Sebe Brown, Eric Burkness, Ashley Dean, Galen P. Dively, Hélène B. Doughty, Shelby J. Fleischer, Jessica Green, Jeremy K. Greene, Krista Hamilton, Erin Hodgson, Thomas Hunt, David Kerns, Billy Rogers Leonard, Sean Malone, Fred Musser, David Owens, John C. Palumbo, Silvana Paula-Moraes, Julie A. Peterson, Ricardo Ramirez, Silvia I Rondon, Tracy L. Schilder, Abby Seaman, Lori Spears, Scott D. Stewart, Sally Taylor, Tyler Towles, Celeste Welty, Joanne Whalen, Robert Wright, Marion ZuefleKeywordsSourceProceedings of the National Academy of SciencesYear2022
- Nitrogen (N) enrichment from excessive fertilization in managed forests affects biogeochemical cycles on multiple scales, but our knowledge of how N availability shifts multi-nutrient stoichiometries (including macronutrients: N, phosphorus, potassium, calcium, magnesium and micronutrients: manganese, iron and zinc) within and among organs (root, stem and leaf) remains limited. To understand the difference among organs in terms of multi-nutrient stoichiometric homeostasis responding to N fertilization, a six-level N supply experiment was conducted through a hydroponic system to examine...AuthorsHongtao Xie, Xueqin Li, Yu Tang, Lauren S. Pile, Songheng JinSourceTree PhysiologyYear2022
- Introduction: The COVID-19 pandemic focused attention on city parks as important public resources. However, monitoring park use over time poses practical challenges. Thus, pandemic-related trends are unknown. Methods: We analyzed monthly mobility data from a large panel of smartphone devices, to assess park visits from January 2018 to November 2020 in the 50 largest U.S. cities. Results: In our sample of 11,890 city parks, visits declined by 36.0 % (95 % CI [27.3, 43.6], p < 0.001) from March through November 2020, compared to prior levels and trends. When we segmented the COVID-19 period...AuthorsJonathan Jay, Felicia Heykoop, Linda Hwang, Alexa Courtepatte, Jorrit de Jong, Michelle KondoKeywordsSourceLandscape and Urban PlanningYear2022
- In this study, we compare electricity consumption of the suburban households with similar socio-economic, demographic, and geographic profiles to assess possible roles of social-psychological and behavioral factors. We examine the extent to which these factors influence self-reported energy curtailment (EC) and energy efficiency (EE) behaviors. We also analyze their distinct yet combined roles—often lumped together in the literature— in explaining the total household's electricity consumption. Our study uses a mix of survey responses and monthly utility data from 155 households in a...AuthorsPranay Kumar, Holly Caggiano, Cara Cuite, Clinton J. Andrews, Frank A. Felder, Rachael Shwom, Kristin Floress, Sonya Ahamed, Chelsea SchellyKeywordsSourceEnergy Research & Social ScienceYear2022
- Wildfire is a complex problem because of the diverse mix of actors and landowners involved, uncertainty about outcomes and future conditions, and unavoidable trade-offs that require ongoing negotiation. In this perspective, we argue that addressing the complex challenge of wildfire requires governance approaches designed to fit the nature of the wildfire problem. For instance, while wildfire is often described as a cross-boundary problem, understanding wildfire risk as transboundary highlights important political and institutional challenges that complicate collaboration across jurisdiction...AuthorsBrett Alan Miller, Laurie Yung, Carina Wyborn, Maureen Essen, Benjamin Gray, Daniel R. WilliamsKeywordsSourceFire. 5: 49.Year2022
- Remotely piloted aircraft systems (RPAS) are providing fresh perspectives for the remote sensing of fire. One opportunity is mapping tree crown scorch following fires, which can support science and management. This proof-of-concept shows that crown scorch is distinguishable from uninjured canopy in point clouds derived from low-cost RGB and calibrated RGB-NIR cameras at fine resolutions (centimeter level). The Normalized Difference Vegetation Index (NDVI) provided the most discriminatory spectral data, but a low-cost RGB camera provided useful data as well. Scorch heights from the point...AuthorsChristopher J. Moran, Valentijn Hoff, Russell A. Parsons, Lloyd P. Queen, Carl A. SeielstadKeywordsSourceFire. 5: 59.Year2022
- Successional processes ultimately determine and define carbon accumulations in forested ecosystems. Although primary succession on wholly new substrate occurs across the globe, secondary succession, often following storm events or anthropogenic disturbance, is more common and is capable of globally significant accumulations of carbon (C) at a time when offsets to anthropogenic carbon dioxide (CO2) emissions are critically needed. In Hawai'i, prior studies have investigated ecosystem development during primary succession on lava flows, including estimates of C mass accumulation. Yet...AuthorsFlint F. Hughes, Dennis Grossman, Travis Sowards, Jonathan D. Marshall, Dieter Mueller‐DomboisKeywordsSourceEcological Applications. 32(4): e2539Year2022
- Increased ecological disturbances, species invasions, and climate change are creating severe conservation problems for several plant species that are widespread and foundational. Understanding the genetic diversity of these species and how it relates to adaptation to these stressors are necessary for guiding conservation and restoration efforts. This need is particularly acute for big sagebrush (Artemisia tridentata; Asteraceae), which was once the dominant shrub over 1,000,000 km2 in western North America but has since retracted by half and thus has become the target of one of the largest...AuthorsAnthony E. Melton, Andrew W. Child, Richard S. Beard, Carlos Dave C. Dumaguit, Jennifer S. Forbey, Matthew Germino, Marie-Anne de Graaff, Andrew Kliskey, Ilia J. Leitch, Peggy Martinez, Stephen J. Novak, Jaume Pellicer, Bryce A. Richardson, Desiree Self, Marcelo Serpe, Sven BuerkiSourceG3: Genes, Genomes, Genetics. 12(7): jkac122.Year2022