Digital Commons Network^™

Pocket Gophers, Mark Nelson, S. Nicole Frey, Earl Creech, Kalen Taylor, Jacob Hadfield, Linden Greenhalgh, Cory Farnsworth, Jody Gale, Melanie Heaton, Justin Wyatt Clawson, Steve Price

All Current Publications

Pocket gophers can damage agriculture and human development infrastructure. In agricultural fields, pocket gophers cause conflicts by directly consuming plants, destroying plants when their soil mounds cover them, and causing premature loss of field stands such as alfalfa, necessitating expensive alfalfa stand replacement. They can chew through electrical, internet, and other utility cables, damaging irrigation pipes, and compromising the integrity of canals and ditch banks. They also cause significant damage to lawns and gardens in urban areas. Understanding pocket gopher habits, especially the burrow system, is the key to effective control. Management methods include trapping, hand or mechanical baiting, fumigation, …

Effects Of Premortem Stress On Protein Expression, Steak Color, Oxidation, And Myofibrillar Fragmentation Index In The Longissimus Lumborum, Reganne K. Briggs, Jerrad F. Legako, Paul R. Broadway, Jeff A. Carroll, Nicole C. Burdick Sanchez, Nikole E. Ineck, Zachary K. Smith, Ranjith Ramanathan, Kara J. Thornton

Animal, Dairy, and Veterinary Science Faculty Publications

No abstract provided.

Evaluating Mountain Lion Diet Before And After A Removal Of Feral Horses In A Semiarid Environment, Peter C. Iacono, Kathryn A. Schoenecker, Kezia R. Manlove, Pat J. Jackson, David C. Stoner

Wildland Resources Faculty Publications

Non-native species can affect ecosystems by influencing native predator-prey dynamics. Therefore, management interventions designed to remove non-natives may inadvertently lead to increased predation on native species. Feral horses are widely distributed throughout the arid parts of western North America. A growing body of research indicates that horses can be an important prey species to mountain lions in ecosystems where they overlap. In December 2020, the Bureau of Land Management removed 455 horses from the Delamar Mountains, Nevada, USA. We leveraged this management intervention to implement a before–after–control–impact study to test hypotheses about predation on horses and native ungulates. We predicted …

Collaborative Knowledge Braiding For Restoration: Assessing Climate Change Risks And Adaptation Options At Wuda Ogwa In Southeastern Idaho, United States, Sofia Koutzoukis, Will Munger, Lindsay Capito, Darren Parry, Brad Parry, Sarah C. Klain, Mark W. Brunson, Nancy Huntly, Travis Taylor

Wildland Resources Faculty Publications

The restoration of culturally significant landscapes poses formidable challenges given more than 160 years of settler-colonial land use change and a rapidly changing climate. A novel approach to these challenges braids Indigenous and western scientific knowledge. This case study braids Indigenous plant knowledge, species distribution models (SDMs), and climate models to inform restoration of the Bear River Massacre site in Idaho, now stewarded by the Northwestern Band of the Shoshone Nation. MaxEnt SDMs were used to project the future spatial distribution of culturally significant plant species under medium (SSP2-4.5) and high (SSP5-8.5) emissions scenarios. These results support Tribal revegetation priorities …

Please Don’T Break: Best Practices For Digitizing And Archiving Glass Plate Photographs, Ariel Hammond, Noelle Zocco, Alejandra Tomeo, Diego Jimenez

Journal of Western Archives

Glass plate photographs, taken primarily between 1860-1930, were meant to document and preserve imagery, however, these photographs developed directly on glass are increasingly prone to destruction. With recent advances in imaging techniques, metadata, and collections care, the preservation of glass photography has evolved. This paper is a snapshot of the current best practices for preserving, digitizing, and storing glass plate and lantern slide photographs. It also features a case study from the San Diego Natural History Museum Library & Archives, which digitized a collection of 2,000+ glass photographs depicting the earliest images of flora and fauna in San Diego County, …

Phylogenomics Recovers Multiple Origins Of Portable Case Making In Caddisflies (Insecta: Trichoptera), Nature's Underwater Architects, Paul B. Frandsen, Ralph W. Holzenthal, Marianne Espeland, Jesse Breinholt, Jessica A. Thomas Thorpe, Sabrina Simon, Akito Y. Kawahara, David Plotkin, Scott Hotaling, Yiyuan Li, C. Riley Nelson, Oliver Niehuis, Christoph Mayer, Lars Podsiadlowski, Alexander Donath, Bernhard Misof, Emily Moriarty Lemmon, Alan Lemmon, John C. Morse, Shanlin Liu, Steffen U. Pauls, Xin Zhou

Watershed Sciences Faculty Publications

Caddisflies (Trichoptera) are among the most diverse groups of freshwater animals with more than 16 000 describes species. They play a fundamental role in freshwater ecology and environmental engineering in streams, rivers and lakes. Because of this, they are frequently used as indicator organisms in biomonitoring programmes. Despite their importance, key questions concerning the evolutionary history of caddisflies, such as the timing and origin of larval case making, remain unanswered owing to the lack of a well-resolved phylogeny. Here, we estimated a phylogenetic tree using a combination of transcriptomes and targeted enrichment data for 207 species, representing 48 of 52 …

Expression And Secretion Of Sparc, Fgf-21 And Dcn In Bovine Muscle Cells: Effects Of Age And Differentiation, Katie A. Shira, Kara J. Thornton, Brenda M. Murdoch, Gabrielle M. Becker, Gwinyai E. Chibisa, Gordon K. Murdoch

Animal, Dairy, and Veterinary Science Faculty Publications

Skeletal muscle growth is an economically important trait in the cattle industry. Secreted muscle-derived proteins, referred to as myokines, have important roles in regulating the growth, metabolism, and health of skeletal muscle in human and biomedical research models. Accumulating evidence supports the importance of myokines in skeletal muscle and whole-body health, though little is known about the potential presence and functional significance of these proteins in cattle. This study evaluates and confirms that secreted proteins acidic and rich in cysteine (SPARC), fibroblast growth factor 21 (FGF-21), myostatin (MSTN), and decorin (DCN) are …

High Sugar Diet Alters Immune Function And The Gut Microbiome In Juvenile Green Iguanas (Iguana Iguana), Kwanho C. Ki, Erin L. Lewis, Elizabeth Wu, Francis J. Oliaro, Lise M. Aubry, Charles R. Knapp, Karen M. Kapheim, Dale Denardo, Susannah S. French

Biology Faculty Publications

The present work aimed to study whether a high sugar diet can alter immune responses and the gut microbiome in green iguanas. Thirty-six iguanas were split into four treatment groups using a 2x2 design. Iguanas received either a sugar-supplemented diet or a control diet, and either a lipopolysaccharide (LPS) injection or a phosphate-buffered saline (PBS) injection. Iguanas were given their respective diet treatment through the entire study (~3 months) and received a primary immune challenge 1 and 2 months into the experiment. Blood samples and cloacal swabs were taken at various points in the experiment and used to measure changes …

Influential Individuals Can Promote Prosocial Practices In Heterogeneous Societies: A Mathematical And Agent-Based Model, Stefani A. Crabtree, Colin D. Wren, Avinash Dixit, Simon A. Levin

Environment and Society Faculty Publications

In this paper, we examine how different governance types impact prosocial behaviors in a heterogenous society. We construct a general theoretical framework to examine a game-theoretic model to assess the ease of achieving a cooperative outcome. We then build a dynamic agent-based model to examine three distinct governance types in a heterogenous population: monitoring one's neighbors, despotic leadership, and influencing one's neighbors to adapt strategies that lead to better fitness. In our research, we find that while despotic leadership may lead towards high prosociality and high returns it does not exceed the effects of a local individual who can exert …

A Structural Role For Tryptophan In Proteins, And The Ubiquitous Trp CΔ1—H&Centerdot;&Centerdot;&Centerdot;O=C (Backbone) Hydrogen Bond, Michal Szczygiel, Urszula Derewenda, Steve Scheiner, Wladek Minor, Zygmunt S. Derewenda

Chemistry and Biochemistry Faculty Publications

Tryptophan is the most prominent amino acid found in proteins, with multiple functional roles. Its side chain is made up of the hydrophobic indole moiety, with two groups that act as donors in hydrogen bonds: the N^ε—H group, which is a potent donor in canonical hydrogen bonds, and a polarized C^δ1—H group, which is capable of forming weaker, noncanonical bonds. Due to adjacent electron-withdrawing moieties, C—H···O hydrogen bonds are ubiquitous in macromolecules, albeit contingent on the polarization of the donor C—H group. Consequently, C^α groups (adjacent to the carbonyl and amino groups of flanking peptide …

Benefits Of Acceptance And Commitment Therapy (Act) For Chronic Pain, Maria Kleinstaeuber, Ashley Yaugher, Emily Roundy, Michael Levin

All Current Publications

Chronic pain is a common experience for people and can be difficult to manage. However, there are many evidence-based and effective psychological treatments for chronic pain to help people improve their lives. One of these is acceptance and commitment therapy, or ACT. ACT teaches how to accept pain and live a life full of meaning and quality, with pain. It helps individuals increase their quality of life through mindfulness-based methods, experiential processing, and a focus on values, goals, and actions. ACT has been shown to be effective in reducing pain and improving pain management and personal well-being. Consult the resources …

Beneficial Plant-Microbe Interactions And Stress Tolerance In Maize, Saroj Burlakoti, Ananta R. Devkota, Shital Poudyal, Amita Kaundal

Plants, Soils, and Climate Faculty Publications

Beneficial microbes are crucial for improving crop adaptation and growth under various stresses. They enhance nutrient uptake, improve plant immune responses, and help plants tolerate stresses like drought, salinity, and heat. The yield potential of any crop is significantly influenced by its associated microbiomes and their potential to improve growth under different stressful environments. Therefore, it is crucial and exciting to understand the mechanisms of plant-microbe interactions. Maize (Zea mays L.) is one of the primary staple foods worldwide, in addition to wheat and rice. Maize is also an industrial crop globally, contributing 83% of its production for …

Plum Curculio (Conotrachelus Nenuphar), Kate V. Richardson, Marion Murray

All Current Publications

Plum curculio is a brown weevil (beetle with a snout) native to eastern North America, where it is a major pest of pome and stone fruits. It was detected in Box Elder County, Utah, in the early 1980s, and this population remains the only known infestation in western North America, where it is occasionally found in residential and wild fruit trees. Plum curculio is a quarantine pest in western North America (U.S. and Canada), and fruit grown in infested counties is restricted from being exported. Thus, it is a threat to Utah’s fruit industry and requires ongoing monitoring and management …

Time And Habitat Structure Shape Insect Acoustic Activity In The Amazon, Leandro A. Do Nascimento, Cristian Pérez-Granados, Janderson B. Rodrigues Alencar, Karen H. Beard

Wildland Resources Faculty Publications

Insects are the most diverse animal taxon on Earth and play a key role in ecosystem functioning. However, they are often neglected by ecological surveys owing to the difficulties involved in monitoring this small and hyper-diverse taxon. With technological advances in biomonitoring and analytical methods, these shortcomings may finally be addressed. Here, we performed passive acoustic monitoring at 141 sites (eight habitats) to investigate insect acoustic activity in the Viruá National Park, Brazil. We first describe the frequency range occupied by three soniferous insect groups (cicadas, crickets and katydids) to calculate the acoustic evenness index (AEI). Then, we assess how …

Meta-Theoretic Competence For Computational Agent-Based Modeling, Hillary Swanson, Uri Wilensky

Instructional Technology and Learning Sciences Faculty Publications

In the U.S. context, science standards encourage educators to engage students in modeling practices, including computational modeling. While much work has investigated the productivity of computational modeling with respect to students' development of scientific content knowledge, less work has focused on students' development of knowledge and skills for participation in computational modeling practices. A first step in understanding how these practices develop is examining students' activity in the context of computational modeling environments with attention to the productive moves they make. These moves can provide insight into the knowledge they bring to their learning, which may be foundational to the …

What Happened To The Geometry? Examining Spatial And Mathematical Concepts In Computational Toys And Kits For Young Children, Jody Clarke-Midura, Jessica F. Shumway, Anahita Ashineh, Alireza Zandi, Whitney Clawson

Instructional Technology and Learning Sciences Faculty Publications

This paper explores the design of computational toys and kits for young children (ages 4-7) as tools for learning integrated mathematical, spatial, and computational thinking concepts. Specifically, we examine how the design features of the toys and kits represent the concepts of rotation on a point and spatial orientation of the agent. We examine toys and kits sold commercially, developed through research, and used in early childhood classrooms. Our findings indicate that the mathematical and spatial concepts are overlooked in some designs. Prior research examined toys for their affordances related to computational thinking, the present study contributes to understanding of …

Cytokine-Supplemented Maturation Medium Enhances Cytoplasmic And Nuclear Maturation In Bovine Oocytes, Renata Blocher, Ying Liu, Tayler Patrick, Irina A. Polejaeva

Animal, Dairy, and Veterinary Science Faculty Publications

Bovine in vitro oocyte maturation (IVM) is an easy way to obtain oocytes for subsequent assisted reproductive techniques but is inefficient compared to in vivo maturation. Supplementation of three cytokines, fibroblast growth factor 2 (FGF2), leukemia inhibitory factor (LIF), and insulin-like growth factor 1 (IGF1), or FLI, has increased oocyte maturation and embryo development in multiple species, but studies have not explored the oocyte differences caused by FLI IVM supplementation. This study aimed to assess important nuclear and cytoplasmic maturation events in high-quality oocytes. FLI-supplemented oocytes had a decreased GV (3.0% vs. 13.7%, p < 0.01) and increased telophase I incidence (34.6% vs. 17.6%, p < 0.05) after IVM, increased normal meiotic spindles (68.8% vs. 50.0%, p < 0.001), and an increased nuclear maturation rate (75.1% vs. 66.8%, p < 0.001). Moreover, in metaphase II oocytes, the percentage of FLI-treated oocytes with a diffuse mitochondrial distribution was higher (87.7% vs. 77.5%, p < 0.05) and with a cortical mitochondrial distribution was lower (11.6% vs. 17.4%, p < 0.05). Additionally, FLI-supplemented oocytes had more pattern I cortical granules (21.3% vs. 14.4%, p < 0.05). These data suggest that FLI supplementation in bovine in vitro maturation medium coordinates nuclear and cytoplasmic maturation to produce higher-quality oocytes.

Effects Of Differing Radiation Methods On Charge Transport In Polymers, Zachary Gibson, Jr Dennison, Virginie Griseri

Presentations

The mitigation of deleterious arcing and sparking onboard spacecraft depends upon a thorough understanding of the electrical properties of the materials involved. This includes not only understanding steady-state parameters such as dark conductivity, but responses to the space environment as well. For example, radiation-induced conductivity drastically changes the conductivity of a material due to the presence of radiation. However, this change in conductivity diminishes away once the radiation is no longer present. There may also be permanent changes, or aging, in the material properties. The physical processes of aging can be complicated and are often difficult to model. Therefore, empirical …

Seasonal Activity Patterns And Home Range Sizes Of Wolves In The Human-Dominated Landscape Of Northeast Türkiye, J. David Blount, Austin M. Green, Mark Chynoweth, Kyle D. Kittelberger, Dário Hipólito, Katarzyna Bojarska, Emrah Çoban, Josip Kusak, Çağan H. Şekercioğlu

Wildland Resources Faculty Publications

Gray wolves Canis lupus comprise one of the most widely distributed carnivore species on the planet, but they face myriad environmental and anthropogenic pressures. Previous research suggests that wolves adjust their time- and space-use seasonally to mitigate risks from humans, conspecifics, and other predators while maximizing their hunting and reproductive success. With many populations of wolves resettling in areas with dense human populations, understanding how wolves may adjust their temporal and spatial patterns in these more human-dominated landscapes is of high conservation importance. Typically, human presence causes wolves to increase their nocturnality and home range size. Here, we look at …

Evaluation Of Major Physical And Mechanical Properties Of Trembling Aspen Lumber, Dawei Wang, Mengyuan Zhang, Meng Gong, Ying-Hei Chui

Aspen Bibliography

Trembling aspen (Populus tremuloides) is one of the major species within Populus, a predominant genus of hardwoods in North America. However, its utilization has been limited to pulp and paper or wood-based composite boards. This study aimed at evaluating the major physical and mechanical properties of trembling aspen lumber, with an ultimate objective of using this species to produce engineered wood products (EWPs). The testing materials consisted of 2 × 4 (38 mm × 89 mm) trembling aspen lumber pieces in lengths of 8, 10, and 12 feet (2.44, 3.05, and 3.66 m) with two visual grades, …

Mixing Trembling Aspen And White Spruce Increases The Understory Vegetation Cover And Improves Soil Properties But Effects Vary With Broadleaf Density, Mostarin Ara, Bradley D. Pinno, Philip G. Comeau

Aspen Bibliography

Despite the importance of species mixtures to ecosystem-based forest management, density effect of broadleaf trees in the mixture on understory vegetation and soil properties are poorly understood. In this study, we examine the effects of trembling aspen [aspen] (Populus tremuloides Michx.) -white spruce [ spruce] (Picea glauca (Moench) Vos) mixtures that vary in the proportion of aspen on understory vegetation cover, soil nutrient supply rates, and soil properties. Data were collected from an established study located in Alberta, Canada at age 20 and included the following treatments: 1. Natural regeneration of pure aspen; 2. Retaining only …

Ancient Nitrogenases Are Atp Dependent, Derek F. Harris, Holly R. Rucker, Amanda K. Garcia, Zhi-Yong Yang, Scott D. Chang, Hannah Feinsilber, Betül Kaçar, Lance C. Seefeldt

Chemistry and Biochemistry Faculty Publications

Life depends on a conserved set of chemical energy currencies that are relics of early biochemistry. One of these is ATP, a molecule that, when paired with a divalent metal ion such as Mg²⁺, can be hydrolyzed to support numerous cellular and molecular processes. Despite its centrality to extant biochemistry, it is unclear whether ATP supported the function of ancient enzymes. We investigate the evolutionary necessity of ATP by experimentally reconstructing an ancestral variant of the N₂-reducing enzyme nitrogenase. The Proterozoic ancestor is predicted to be ~540–2,300 million years old, post-dating the Great Oxidation Event. Growth …

Pollination And Seed Production Of Lavandula Angustifolia Mill. (Lamiaceae), Sam S. Ingram, Tyler M. Wilson, Joseph S. Wilson, Emma A. Ziebarth, Makenna C. Johnson, Jacob G. Young, Richard E. Carlson

Biology Faculty Publications

Lavandula angustifolia Mill., lavender, is an aromatic plant in the Lamiaceae family. Lavender is an important economic plant that is cultivated throughout the world. Previous studies have shown that the primary pollinators of lavender in Europe and North Africa are bee species, specifically Bombus spp. However, similar studies have not been previously performed in North America. The current study, on cultivated population lavender (grown from seed) in Utah (USA), found a diverse community of bees visiting lavender over a 4-week sequential and successive blooming period. The observed and identified bees were distinguished across 8 genera and 12 species, of which …

Theory-Based Science Communication At Comic Cons, Lisa Lundgren, Emily Slater, Man Zhang, Kadie Kunz, Gabriel-Philip Santos

Instructional Technology and Learning Sciences Faculty Publications

The majority of research concerning science communication happens in spaces where people already have a vested interest in or knowledge of science, such as museums and science cafes. Thus, there is a gap in understanding what theory-based science communication looks like in non-science-centered spaces. This qualitative research study, which featured cosplaying science communicators at comic conventions, offers insights into what science communication practices occur within everyday spaces. We conducted observations of and semi-structured interviews with 15 cosplaying scientists, examining how they utilized effective framing and narrative structuring when communicating science at comic cons in cosplay. Across 700 coded utterances, cosplaying …

Hiding Operational Problems That Need To Be Revealed- A Study Linking Environmental Accidents And Product Recalls, Rick Hardcopf, Rachna Shah

Management Faculty Publications

Purpose:

This study investigates whether a firm that has experienced an environmental accident (EA) is less likely to conduct a product recall. If true, it would indicate that EAs tempt firms to hide operational problems that need to be revealed. The logic is that both events are operational failures that damage a firm’s reputation and share price. Following an EA, a firm may avoid a product recall to avoid providing additional evidence of operational incapability and social irresponsibility and thereby triggering amplified reputational and market penalties.

Research design/methodology/approach:

The dataset is compiled from several public and private sources and includes …

Using Dna Barcoding To Identify High-Priority Taxa (Hymenoptera: Ichneumonidae) From Great Smoky Mountains National Park, Emerie Landers, Brandon Claridge, Will Kuhn, Victoria Seymour, Hettie Peek, Scout Fluet, Jake Ramgren, Jake Phelps, Brayden Paulk, Lydia Cordner, Jeremy Blaschke

Biology Student Research

The All Taxa Biodiversity Inventory (ATBI) in Great Smoky Mountains National Park (GSMNP) seeks to document every species of living thing in the park. The ATBI is decades in progress, yet some taxa remain virtually untouched by taxonomists. Such "high priority" taxa include the hyper-diverse parasitoid wasp family Ichneumonidae. Despite the positive and multifaceted effects ichneumonids have on their environment, only a small percentage of those collected in the park have been identified as species, mostly to their complex morphology and overwhelming diversity. Recently, DNA barcoding has transformed biodiversity inventories, streamlining the process to be more rapid and efficient. To …

Models And Sufficiency Interpretation For Estimating Critical Soil Test Values For The Fertilizer Recommendation Support Tool, N. A. Slaton, A. Pearce, L. Gatiboni, D. Osmond, C. Bolster, F. Miquez, J. Clark, J. Dhillon, B. Farmaha, D. Kaiser, S. Lyons, A. Margenot, A. Moore, D. Ruiz Diaz, D. Sotomayor, J. Spackman, J. Spargo, M. Yost

Plants, Soils, and Climate Faculty Publications

Soil test correlation determines whether a soil test can be used to predict the need for fertilization based on the critical soil test value (CSTV). Our objectives were to compare the CSTV estimated from five combinations of correlation models and yield sufficiency interpretations and to select one method for soil test correlation performed with the Fertilizer Recommendation Support Tool (FRST). Four models were fit to three datasets with strong (Mehlich-1 K), moderate (Mehlich-3 K), or weak (Olsen P) correlations between soil test P or K and crop relative yield. We tested the arcsine-log calibration curve (ALCC), exponential (EXP), linear plateau …

Ecosystem Sentinels As Early-Warning Indicators In The Anthropocene, Elliott L. Hazen, Matthew S. Savoca, T.J. Clark-Wolf, Max Czapanskiy, Peter M. Rabinowitz, Briana Abrahms

Wildland Resources Faculty Publications

We are already experiencing the rapid pace of environmental perturbation in the Anthropocene, necessitating the development of new tools and techniques for measuring changes in ecosystem dynamics. Sentinel species, from birds to invertebrates, have been used to provide insights into ecosystem function, as leading indicators of risk to human health and as harbingers of future change, with implications for ecosystem structure and function. Here, we offer an update to previous research identifying marine top predators as indicators of ecosystem shifts and examine terrestrial sentinels and the latest research on sentinels of pollution and human health. Using ecosystem sentinels enables rapid …

50 Common Questions About Field Crops, Matt Yost, Burdette Barker, Cody Zesiger, Jody Gale, Justin Wyatt Clawson, Mark Nelson, Matthew Palmer, Michael Pace, Cheyenne Reid, Steven Price, Earl Creech, Corey Ransom, Grant Cardon, Clara Anderson, Madelyn Kunzler

All Current Publications

Utah State University Extension strives to provide research-based information and knowledge to help agricultural producers. Producers often have questions about several aspects of field crop production. This article is not comprehensive of all questions about field crops but represents some of the common questions that USU faculty have received from the public, producers, and crop advisors.

Wildfire Smoke Impacts Lake Ecosystems, Mary Jade Farruggia, Janice Brahney, Andrew J. Tanentzap, Jennifer A. Bentrup, Ludmila S. Brighenti, Sudeep Chandra, Alicia Cortés, Rocio L. Fernandez, Janet M. Fischer, Alexander L. Forrest, Yufang Jin, Kenneth Larrieu, Ian M. Mccullough, Isabella A. Oleksy, Rachel M. Pilla, James A. Rusak, Facundo Scordo, Adrianne P. Smits, Celia C. Symons, Minmeng Tang, Samuel G. Woodman, Steven Sadro

Watershed Sciences Faculty Publications

Wildfire activity is increasing globally. The resulting smoke plumes can travel hundreds to thousands of kilometers, reflecting or scattering sunlight and depositing particles within ecosystems. Several key physical, chemical, and biological processes in lakes are controlled by factors affected by smoke. The spatial and temporal scales of lake exposure to smoke are extensive and under-recognized. We introduce the concept of the lake smoke-day, or the number of days any given lake is exposed to smoke in any given fire season, and quantify the total lake smoke-day exposure in North America from 2019 to 2021. Because smoke can be transported at …