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- The spread of aquatic invasive species typically occurs through a combination of natural and human mediated dispersal. For many aquatic invasive species, natural dispersal is limited to aquatic corridors connecting habitat. In contrast, human transport may facilitate more distant dispersal and transport among disconnected waterbodies. Genetic information can serve as a powerful tool to track invasion histories and identify both the sources and mechanisms of invasive species dispersal. We used genetic information to understand invasion history and dynamics of expanding northern pike...AuthorsKellie Carim, Lisa A. Eby, Loren M. Miller, Holly McLellan, Virgil Dupuis, Michael K. SchwartzSourceManagement of Biological Invasions. 13(1): 168-190.Year2022
- A severe outbreak of wildfire across the US Pacific Coast during August 2020 led to persistent fire activity through the end of summer. In late September, FireWeather Outlooks predicted higher than usual fire activity into the winter in parts of California, with concomitant elevated fire danger in the Southeastern US. To help inform the regional and national allocation of firefighting personnel and equipment, we developed visualizations of resource use during recent late season, high-demand analogs. Our visualizations provided an overview of the crew, engine, dozer, aerial resource, and...AuthorsErin J. Belval, Karen C. Short, Crystal S. Stonesifer, Dave E. CalkinSourceFire. 5: 35.Year2022
- Bark beetle (Coleoptera: Curculionidae: Scolytinae) outbreaks can be spectacular, killing trees across hundreds to thousands of hectares or more of forest land. As bark beetles are a natural disturbance agent, it is hypothesized that ecosystems are adapted to such periodic disturbances. Under climate change, however, these beetle outbreaks have become more severe, persistent, and chronic on many landscapes, bringing into question the long-term resilience of these forests and the biota that depend on them. Our chapter objective is to review and generalize the effects of bark beetle outbreaks...AuthorsKamal J. K. Gandhi, Chelsea N. Miller, Paula J. Fornwalt, John M. FrankKeywordsSourceIn: Gandhi, Kamal J. K.; Hofstetter, Richard W., eds. Bark Beetle Management, Ecology, and Climate Change. Academic Press. p. 227-259.Year2022
- Quantifying fuel load over large areas is essential to support integrated fire management initiatives in fire-prone regions to preserve carbon stock, biodiversity and ecosystem functioning. It also allows a better understanding of global climate regulation as a potential carbon sink or source. Large area assessments usually require data from spaceborne remote sensors, but most of them cannot measure the vertical variability of vegetation structure, which is required for accurately measuring fuel loads and defining management interventions. The recently launched NASA’s Global Ecosystem...AuthorsRodrigo Vieira Leite, Carlos Alberto Silva, Eben North Broadbent, Cibele Hummel do Amaral, Veraldo Liesenberg, Danilo Roberti Alves de Almeida, Midhun Mohan, Sergio Godinho, Adrian Cardil, Caio Hamamura, Bruno Lopes de Faria, Pedro H. S. Brancalion, Andre Hirsch, Gustavo Eduardo Marcatti, Ana Paula Dalla Corte, Angelica Maria Almeyda Zambrano, Maira Beatriz Teixeira da Costa, Eraldo Aparecido Trondoli Matricardi, Anne Laura da Silva, Lucas Ruggeri Re Y. Goya, Ruben Valbuena, Bruno Araujo Furtado de Mendonca, Celso H. L. Silva Junior, Luiz E. O. C. Aragao, Mariano García, Jingjing Liang, Trina Merrick, Andrew T. Hudak, Jingfeng Xiao, Steven Hancock, Laura Duncason, Matheus Pinheiro Ferreira, Denis Valle, Sassan Saatchi, Carine KlaubergKeywordsSourceRemote Sensing of Environment. 268: 112764.Year2022
- Airborne lidar is often used to calculate forest metrics about trees, but it may also provide a wealth of information about the space between trees. Forest canopy gaps are defined by the absence of vegetative structure and serve important roles for wildlife, such as facilitating animal movement. Forest canopy gaps also occur around snags, keystone structures that provide important substrates to wildlife species for breeding, roosting and foraging.AuthorsJessica M. Stitt, Andrew T. Hudak, Carlos A. Silva, Lee A. Vierling, Kerri T. VierlingKeywordsSourceMethods in Ecology Evolution. 13: 473-484.Year2022
- Fire suppression and the loss of western white pine (WWP) have made northern Rocky Mountain moist mixed-conifer forests less disturbance resilient. Although managers are installing hundreds of plantations, most of these plantations have not experienced wildfire since establishment. In 2015, wildfires burned through 100 WWP plantations in this region, providing an opportunity to evaluate the effects of wildfires on sapling survival. A Weibull distribution approach was used to characterize the variation of fire severity pixels, as indicated by the differenced normalized burn ratio. The...AuthorsTerrie B. Jain, Andrew S. Nelson, Benjamin C. Bright, John C. Byrne, Andrew T. HudakKeywordsSourceJournal of Forestry. 2022: 22-36.Year2022
- Parcel-level risk (PLR) describes how wildfire risk varies from home to home based on characteristics that relate to likely fire behavior, the susceptibility of homes to fire, and the ability of firefighters to safely access properties. Here, we describe the WiRe Rapid Assessment (RA), a parcel-level rapid wildfire risk assessment tool designed to evaluate PLR with a small set of measures for all homes in a community. We investigate the relationship between 2019WiRe RA data collected in the Columbine Lake community in Grand County, Colorado, and whether assessed homes were destroyed in the...AuthorsJames R. Meldrum, Christopher M. Barth, Julia B. Goolsby, Schelly K. Olson, Adam C. Gosey, James (Brad) White, Hannah Brenkert-Smith, Patricia A. Champ, Jamie GomezKeywordsSourceFire. 5: 24.Year2022
- Wildfires in the western United States (US) are increasingly expensive, destructive, and deadly. Reducing wildfire losses is particularly challenging when fires frequently start on one land tenure and damage natural or developed assets on other ownerships. Managing wildfire risk in multjurisdictional landscapes has recently become a centerpiece of wildfire strategic planning, legislation, and risk research. However, important empirical knowledge gaps remain regarding cross-boundary fire activity in the western US. Here, we use lands administered by the US Forest Service as a study system...AuthorsWilliam M. Downing, Christopher J. Dunn, Matthew P. Thompson, Michael D. Caggiano, Karen C. ShortSourceScientific Reports. 12: 2624.Year2022
- Standing dead trees (known as snags) are historically difficult to map and model using airborne laser scanning (ALS), or lidar. Specific snag characteristics are important for wildlife; for instance, a larger snag with a broken top can serve as a nesting platform for raptors. The objective of this study was to evaluate whether characteristics such as top intactness could be inferred from discrete-return ALS data. We collected structural information for 198 snags in closed-canopy conifer forest plots in Idaho. We selected 13 lidar metrics within 5 m diameter point clouds to serve as...AuthorsJessica M. Stitt, Andrew T. Hudak, Carlos A. Silva, Lee A. Vierling, Kerri T. VierlingKeywordsSourceRemote Sensing. 14: 720.Year2022
- As wildfires increase in extent and severity, we need new tools to rehabilitate burned landscapes. We tested the effectiveness of adding fire moss tissue, produced in the greenhouse, as a bio-inoculant to severely burned soils in dry mixed conifer forests. We conducted three sequential experiments using knowledge gained from previous experiments to fine-tune fire moss delivery methods. The first two experiments began in July 2017, less than ten days after a wildfire in Arizona, United States. First, we added disaggregated (passed through a 2 mm sieve) cultivated moss tissue to burned soil...AuthorsHenry S. Grover, Matthew A. Bowker, Peter Z. Fule, Carolyn H. Sieg, Anita J. AntoninkaKeywordsSourceEcological Engineering. 176: 106513.Year2022