Treesearch
Displaying 4,601 - 4,610 of 65,035 Publications- 1. Bergmann's rule—which posits that larger animals live in colder areas—is thought to influence variation in body size within species across space and time, but evidence for this claim is mixed. 2. We used Bayesian hierarchical models to test four competing hypotheses for spatiotemporal variation in body size within 20 bat species across North America: (1) the heat conservation hypothesis, which posits that increased body size facilitates body heat conservation (and which is the traditional explanation for the mechanism underlying Bergmann's rule); (2) the heat mortality hypothesis, which...AuthorsJesse M. Alston, Douglas A. Keinath, Craig K. R. Willis, Cori L. Lausen, Joy M. O'Keefe, Janet D. Tyburec, Hugh G. Broders, Paul R. Moosman, Timothy C. Carter, Carol L. Chambers, Erin H. Gillam, Keith Geluso, Ted Weller, Douglas W. Burles, Quinn E. Fletcher, Kaleigh J. O. Norquay, Jacob R. GoheenKeywordsSourceFunctional Ecology. 37(4): 1020-103Year2023
- In 2011–2013, we determined the interactive effects of the cerambycid pheromones racemic syn-2,3-hexanediol, racemic 3-hydroxyhexan-2-one, and racemic 3-hydroxyoctan-2-one on trap catches of predators associated with bark and woodboring beetles in north Georgia and South Carolina. Temnoscheila virescens (F.) (Coleoptera: trogossitidae) was attracted to traps baited with 3-hydroxyhexan-2-one; ethanol enhanced attraction. Traps baited with syn-2,3-hexanediol attracted Chariessa pilosa (Forster) (Coleoptera: Cleridae); attraction was interrupted by 3-hydroxyhexan-2-one. An assassin bug...AuthorsD Miller, P Mayo, J D. SweeneyKeywordsSourceEnvironmental EntomologyYear2023
- Background: Tropical forests are critical for the global carbon budget, yet they have been threatened by deforestation and forest degradation by fre, selective logging, and fragmentation. Existing uncertainties on land cover classifcation and in biomass estimates hinder accurate attribution of carbon emissions to specifc forest classes. In this study, we used textural metrics derived from PlanetScope images to implement a probabilistic classifcation framework to identify intact, logged and burned forests in three Amazonian sites. We also estimated biomass for these forest classes using...AuthorsEkena Rangel Pinagé, Michael Keller, Christopher P. Peck, Marcos Longo, Paul Duffy, Ovidiu CsillikKeywordsSourceCarbon Balance and ManagementYear2023
- Wildfires are a global crisis, but current fire models fail to capture vegetation response to changing climate. With drought and elevated temperature increasing the importance of vegetation dynamics to fire behavior, and the advent of next generation models capable of capturing increasingly complex physical processes, we provide a renewed focus on representation of woody vegetation in fire models. Currently, the most advanced representations of fire behavior and biophysical fire effects are found in distinct classes of fine-scale models and do not capture variation in live fuel (i.e....AuthorsAlexandra K. Jonko, Rodman R. Linn, Ilkay Altintas, Adam L. Atchley, L. Turin Dickman, Andreas Bar, Adam D. Collins, Jean-Luc Dupuy, Michael R. Gallagher, J. Kevin Hiers, Chad M. Hoffman, Sharon M. Hood, Matthew D. Hurteau, W. Matt Jolly, Alexander Josephson, E. Louise Loudermilk, Wu Ma, Sean T. Michaletz, Rachael H. Nolan, Joseph J. O’Brien, Russell A. Parsons, Raquel Partelli-Feltrin, Francois Pimont, Vıctor Resco de Dios, Joseph Restaino, Zachary J. Robbins, Karla A. Sartor, Emily Schultz-Fellenz, Shawn P. Serbin, Sanna Sevanto, Jacquelyn K. Shuman, Carolyn H. Sieg, Nicholas Skowronski, David R. Weise, Molly Wright, Chonggang Xu, Marta Yebra, Nicolas YounesKeywordsSourceNew Phytologist. 238(3): 952-970.Year2023
- Over 200 years ago, Ailanthus altissima (tree-of-heaven) was introduced to the United States for use as an ornamental. The tree was recognized for its ability to tolerate various soil types and climates, rapid growth, high reproductive capacity, and lack of apparent insect pests or diseases. Initially, Ailanthus represented a reliable tree to plant in cities and revegetate disturbed areas. Today, however, the species is a common invader in many forests across the nation.AuthorsNorthern Research Station USDA Forest ServiceSourceRooted in Research Issue 13, January 2023Year2023
- A new mold growth model was developed to aid in moisture risk assessment of wood-based building assemblies. This proposed simple model relies on several features common to existing mold growth models but combines them in a new way with improved predictive power. Structurally the model is based on a dose-response relationship. Hygrothermal conditions conducive to mold growth are represented using a mold germination isopleth, i.e., a critical relative humidity curve as a function of temperature. The dose at a given time step depends on the difference between surface relative humidity and the...AuthorsCharles R. Boardman, Samuel V. Glass, Robert LepageSourceJournal of Building EngineeringYear2023
- Salvage logging using ground-based heavy equipment can impact soils and vegetation and lead to various effects that can increase or decrease post-fire runoff and erosion (removal of soil or sediment from its initial position). This document briefly outlines the current understanding of these effects and provides an overview of best management practices (BMPs) designed to mitigate the negative effects related to sediment delivery to streams and other aquatic resources. This document is based on the authors' knowledge and best available scientific information and is intended to supplement...AuthorsJoseph Wagenbrenner, Drew Coe, Will OlsenKeywordsSourceCalifornia Forestry Report No. 7. Sacramento: State of California, The Resources Agency, California Department of Forestry & Fire Protection. 32 p.Year2023
- In the U.S., federal, tribal, state, local, and private land management entities seek to implement a wildfire management strategy that spans large spatial extents and multiple ownerships to achieve wildfire risk reduction and forest restoration. This strategy requires cross-boundary cooperation. Cooperative cross-boundary forest management is not new; yet little case study research has documented historical examples. This study provides insight into how potentially overlooked models of cross-boundary cooperation of the past may be applicable to renewed cross-boundary cooperation today. We...AuthorsMichelle Steen-Adams, Susan Charnley, Mark AdamsKeywordsSourceLand Use Policy. 127(3): 106550.Year2023
- Forest landscape simulation models (FLM) have been extensively used for projecting ecosystem dynamics and carbon fluxes. However, more guidance and methods for formal calibration and corroboration of FLMs are needed to ensure higher fidelity results from these models. We developed a novel systematic methodology for calibrating and corroborating a FLM at the grid-cell scale using empirical estimates from the national forest inventory in the United States (US) which uses an equal probability sample design. We illustrate our approach by using the Forest Inventory and Analysis (FIA) data from...AuthorsLucia A. Fitts, Jacob S. Fraser, Brian R. Miranda, Grant M. Domke, Matthew B. Russell, Brian R. SturtevantKeywordsSourceEcological ModellingYear2023
- The behaviour of wildland fires and the dispersion of smoke from those fires can be strongly influenced by atmospheric turbulent flow. The science to support that assertion has developed and evolved over the past 100+ years, with contributions from laboratory and field observations, as well as modelling experiments. This paper provides a synthesis of the key laboratory- and field- based observational studies focused on wildland fire and atmospheric turbulence connections that have been conducted from the early 1900s through 2021. Included in the synthesis are reports of anecdotal turbulence...AuthorsWarren E. E. HeilmanKeywordsSourceInternational Journal of Wildland FireYear2023