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Articles 3631 - 3660 of 11634
Full-Text Articles in Entire DC Network
The Forgotten Stage Of Forest Succession: Early-Successional Ecosystems On Forest Sites, Mark E. Swanson, Jerry F. Franklin, Robert L. Beschta, Charles M. Crisafulli, Dominick A. Dellasala, Richard L. Hutto, David B. Lindenmaver, Frederick J. Swanson
The Forgotten Stage Of Forest Succession: Early-Successional Ecosystems On Forest Sites, Mark E. Swanson, Jerry F. Franklin, Robert L. Beschta, Charles M. Crisafulli, Dominick A. Dellasala, Richard L. Hutto, David B. Lindenmaver, Frederick J. Swanson
Biological Sciences Faculty Publications
Early-successional forest ecosystems that develop after stand-replacing or partial disturbances are diverse in species, processes, and structure. Post-disturbance ecosystems are also often rich in biological legacies, including surviving organisms and organically derived structures, such as woody debris. These legacies and post-disturbance plant communities provide resources that attract and sustain high species diversity, including numerous early-successional obligates, such as certain woodpeckers and arthropods. Early succession is the only period when tree canopies do not dominate the forest site, and so this stage can be characterized by high productivity of plant species (including herbs and shrubs), complex food webs, large nutrient fluxes, …
Generalized Functional Responses For Species Distributions, Jason Matthiopoulos, Mark Hebblewhite, Geert Aarts, John Fieberg
Generalized Functional Responses For Species Distributions, Jason Matthiopoulos, Mark Hebblewhite, Geert Aarts, John Fieberg
Wildlife Biology Faculty Publications
Researchers employing resource selection functions (RSFs) and other related methods aim to detect correlates of space-use and mitigate against detrimental environmental change. However, an empirical model fit to data from one place or time is unlikely to capture species responses under different conditions because organisms respond nonlinearly to changes in habitat availability. This phenomenon, known as a functional response in resource selection, has been debated extensively in the RSF literature but continues to be ignored by practitioners for lack of a practical treatment. We therefore extend the RSF approach to enable it to estimate generalized functional responses (GFRs) from spatial …
Montana Kaimin, March 1, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, March 1, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
A Specific Interaction Of Small Molecule Entry Inhibitors With The Envelope Glycoprotein Complex Of The Junín Hemorrhagic Fever Arenavirus, Celestine J. Thomas, Hedi E. Casquilho-Gray, Joanne York, Dianne L. Decamp, Dongcheng Dai, Erin B. Petrilli, Dale L. Boger, Richard A. Slayden, Sean M. Amberg, Stephen Sprang, Jack H. Nunberg
A Specific Interaction Of Small Molecule Entry Inhibitors With The Envelope Glycoprotein Complex Of The Junín Hemorrhagic Fever Arenavirus, Celestine J. Thomas, Hedi E. Casquilho-Gray, Joanne York, Dianne L. Decamp, Dongcheng Dai, Erin B. Petrilli, Dale L. Boger, Richard A. Slayden, Sean M. Amberg, Stephen Sprang, Jack H. Nunberg
Biological Sciences Faculty Publications
Arenaviruses are responsible for acute hemorrhagic fevers worldwide and are recognized to pose significant threats to public health and biodefense. Small molecule compounds have recently been discovered that inhibit arenavirus entry and protect against lethal infection in animal models. These chemically distinct inhibitors act on the tripartite envelope glycoprotein (GPC) through its unusual stable signal peptide subunit to stabilize the complex against pH-induced activation of membrane fusion in the endosome. Here, we report the production and characterization of the intact transmembrane GPC complex of Junín arenavirus and its interaction with these inhibitors. The solubilized GPC is antigenically indistinguishable from the …
Montana Kaimin, February 25, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 25, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, February 24, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 24, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, February 18, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 18, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, February 16, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 16, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, February 15, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 15, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, February 10, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 10, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, February 9, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 9, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Montana Kaimin, February 3, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, February 3, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Volatile Chemicals From Leaf Litter Are Associated With Invasiveness Of A Neotropical Weed In Asia, Inderjit, Heather Evans, Christoph Crocoll, Devika Bajpai, Rajwant Kaur, Yu-Long Feng, Carlos Silva, Jacinto Treviño Carreón, Alfonso Valiente-Banuet, Jonathan Gershenzon, Ragan M. Callaway
Volatile Chemicals From Leaf Litter Are Associated With Invasiveness Of A Neotropical Weed In Asia, Inderjit, Heather Evans, Christoph Crocoll, Devika Bajpai, Rajwant Kaur, Yu-Long Feng, Carlos Silva, Jacinto Treviño Carreón, Alfonso Valiente-Banuet, Jonathan Gershenzon, Ragan M. Callaway
Biological Sciences Faculty Publications
Some invasive plant species appear to strongly suppress neighbors in their nonnative ranges but much less so in their native range. We found that in the field in its native range in Mexico, the presence of Ageratina adenophora, an aggressive Neotropical invader, was correlated with higher plant species richness than found in surrounding plant communities where this species was absent, suggesting facilitation. However, in two nonnative ranges, China and India, A. adenophora canopies were correlated with much lower species richness than the surrounding communities, suggesting inhibition. Volatile organic compound (VOC) signals may contribute to this striking biogeographical difference and …
Latitudinal Variation In Top-Down And Bottom-Up Control Of A Salt Marsh Food Web, Laurie B. Marczak, C.-K. Ho, K. Wieski, H. Vu, R. F. Denno, S. C. Pennings
Latitudinal Variation In Top-Down And Bottom-Up Control Of A Salt Marsh Food Web, Laurie B. Marczak, C.-K. Ho, K. Wieski, H. Vu, R. F. Denno, S. C. Pennings
Biological Sciences Faculty Publications
The shrub Iva frutescens, which occupies the terrestrial border of U.S. Atlantic Coast salt marshes, supports a food web that varies strongly across latitude. We tested whether latitudinal variation in plant quality (higher at high latitudes), consumption by omnivores (a crab, present only at low latitudes), consumption by mesopredators (ladybugs, present at all latitudes), or the life history stage of an herbivorous beetle could explain continental-scale field patterns of herbivore density. In a mesocosm experiment, crabs exerted strong top-down control on herbivorous beetles, ladybugs exerted strong top-down control on aphids, and both predators benefited plants through trophic cascades. Latitude …
Floodplain Succession And Soil Nitrogen Accumulation On A Salmon River In Southwestern Kamchatka, Michael R. Morris, Jack Arthur Stanford
Floodplain Succession And Soil Nitrogen Accumulation On A Salmon River In Southwestern Kamchatka, Michael R. Morris, Jack Arthur Stanford
Biological Sciences Faculty Publications
We documented riparian primary succession on an expansive floodplain (Kol River, Kamchatka, Russian Federation) that receives large nitrogen subsidies from spawning Pacific salmon. As is typical of primary succession, new alluvial deposits in the lower Kol floodplain were nitrogen poor (200 kg persulfate N/ha to 10 cm soil depth); however, nitrogen accumulated rapidly, and soils contained 1600 kg N/ha (to 10 cm + the litter layer) by 20 years. Soil nitrogen approached an asymptote at 2500 kg N/ha by 80 years. Nitrogen-fixing Alnus trees were a minor component of the forest community during the first 20 years of succession. However, …
T-705 (Favipiravir) Inhibition Of Arenavirus Replication In Cell Culture, Michelle Mendenhall, Andrew Russell, Terry Juelich, Emily L. Messina, Donald F. Smee, Alexander N. Freiberg, Michael R. Holbrook, Yousuke Furuta, Juan-Carlos De La Torre, Jack H. Nunberg, Brian B. Gowen
T-705 (Favipiravir) Inhibition Of Arenavirus Replication In Cell Culture, Michelle Mendenhall, Andrew Russell, Terry Juelich, Emily L. Messina, Donald F. Smee, Alexander N. Freiberg, Michael R. Holbrook, Yousuke Furuta, Juan-Carlos De La Torre, Jack H. Nunberg, Brian B. Gowen
Biological Sciences Faculty Publications
A number of New World arenaviruses (Junin [JUNV], Machupo [MACV], and Guanarito [GTOV] viruses) can cause human disease ranging from mild febrile illness to a severe and often fatal hemorrhagic fever syndrome. These highly pathogenic viruses and the Old World Lassa fever virus pose a significant threat to public health and national security. The only licensed antiviral agent with activity against these viruses, ribavirin, has had mixed success in treating severe arenaviral disease and is associated with significant toxicities. A novel pyrazine derivative currently in clinical trials for the treatment of influenza virus infections, T-705 (favipiravir), has demonstrated broad-spectrum activity …
Is Wildlife Going To The Dogs? Impacts Of Feral And Free-Roaming Dogs On Wildlife Populations, Julie K. Young, Kirk A. Olson, Richard P. Reading, Sukh Amgalanbaatar, Joel Berger
Is Wildlife Going To The Dogs? Impacts Of Feral And Free-Roaming Dogs On Wildlife Populations, Julie K. Young, Kirk A. Olson, Richard P. Reading, Sukh Amgalanbaatar, Joel Berger
Biological Sciences Faculty Publications
In human-populated landscapes, dogs (Canis familiaris) are often the most abundant terrestrial carnivore. However, dogs can significantly disrupt or modify intact ecosystems well beyond the areas occupied by people. Few studies have directly quantified the environmental or economic effects of free-roaming and feral dogs. Here, we review wildlife-dog interactions and provide a case study that focuses on interactions documented from our research in Mongolia to underscore the need for studies designed to best determine how dogs affect native wildlife and especially imperiled populations. We suggest additional research, public awareness campaigns, and the exclusion of dogs from critical wildlife habitat. The …
Montana Kaimin, January 27, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, January 27, 2011, Students Of The University Of Montana, Missoula
Montana Kaimin, 1898-present
Student newspaper of the University of Montana, Missoula.
Evaluating The Effectiveness Of A Commercial Portable Air Purifier In Homes With Wood Burning Stoves: A Preliminary Study, Julie F. Hart, Tony J. Ward, Terry M. Spear, Richard J. Rossi, Nicholas N. Holland, Brodie G. Loushin
Evaluating The Effectiveness Of A Commercial Portable Air Purifier In Homes With Wood Burning Stoves: A Preliminary Study, Julie F. Hart, Tony J. Ward, Terry M. Spear, Richard J. Rossi, Nicholas N. Holland, Brodie G. Loushin
Public and Community Health Sciences Faculty Publications
Wood burning for residential heating is prevalent in the Rocky Mountain regions of the United States. Studies have shown that wood stoves can be a significant source of PM2.5 within homes. In this study, the effectiveness of an electrostatic filter portable air purifier was evaluated (1) in a home where a wood stove was the sole heat source and (2) in a home where a wood stove was used as a supplemental heat source. Particle count concentrations in six particle sizes and particle mass concentrations in two particle sizes weremeasured for ten 12-hour purifier on and ten purifier off trials …
From Good Intentions To Proven Interventions: Effectiveness Of Actions To Reduce The Health Impacts Of Air Pollution, Luisa V. Giles, Prabjit Barn, Nino Kuenzli, Isabelle Romieu, Murray A. Mittleman, Stephan Van Eeden, Ryan Allen, Chris Carlsten, Dave Stieb, Curtis W. Noonan, Audrey Smargiassi, Joel D. Kaufman, Shakoor Hajat, Tom Kosatsky, Michael Brauer
From Good Intentions To Proven Interventions: Effectiveness Of Actions To Reduce The Health Impacts Of Air Pollution, Luisa V. Giles, Prabjit Barn, Nino Kuenzli, Isabelle Romieu, Murray A. Mittleman, Stephan Van Eeden, Ryan Allen, Chris Carlsten, Dave Stieb, Curtis W. Noonan, Audrey Smargiassi, Joel D. Kaufman, Shakoor Hajat, Tom Kosatsky, Michael Brauer
Biomedical and Pharmaceutical Sciences Faculty Publications
BACKGROUND: Associations between air pollution and a multitude of health effects are now well established. Given ubiquitous exposure to some level of air pollution, the attributable health burden can be high, particularly for susceptible populations. OBJECTIVES: An international multidisciplinary workshop was convened to discuss evidence of the effectiveness of actions to reduce health impacts of air pollution at both the community and individual level. The overall aim was to summarize current knowledge regarding air pollution exposure and health impacts leading to public health recommendations. DISCUSSION: During the workshop, experts reviewed the biological mechanisms of action of air pollution in the …
Crown Of The Continent Magazine - Winter 2011, University Of Montana, Missoula
Crown Of The Continent Magazine - Winter 2011, University Of Montana, Missoula
Crown of the Continent and the Greater Yellowstone Magazine
Table of Contents: This is Bob Marshall Country -- Bob Marshall the Man -- A Creation Story: How the wilderness came to be -- Science and Public Policy -- Views of the Crown: Colored photos by Chuck Haney -- How Did the Bear Cross the Road? -- Hardy Survivors of the Pine -- A Town of the Crown
Harlequin's Daughter, Abby Swanson
Hard Work, Jamie Rogers
Another Dirty Spring, Peter Horton
Dynamics Of Gene Duplication In The Genomes Of Chlorophyll D-Producing Cyanobacteria: Implications For The Ecological Niche, Scott R. Miller, A. Michelle Wood, Robert E. Blankenship, Maria Kim, Steven Ferriera
Dynamics Of Gene Duplication In The Genomes Of Chlorophyll D-Producing Cyanobacteria: Implications For The Ecological Niche, Scott R. Miller, A. Michelle Wood, Robert E. Blankenship, Maria Kim, Steven Ferriera
Biological Sciences Faculty Publications
Gene duplication may be an important mechanism for the evolution of new functions and for the adaptive modulation of gene expression via dosage effects. Here, we analyzed the fate of gene duplicates for two strains of a novel group of cyanobacteria (genus Acaryochloris) that produces the far-red light absorbing chlorophyll d as its main photosynthetic pigment. The genomes of both strains contain an unusually high number of gene duplicates for bacteria. As has been observed for eukaryotic genomes, we find that the demography of gene duplicates can be well modeled by a birth-death process. Most duplicated Acaryochloris genes are of …
Steatite On The Juniata: Early Pottery At The Sunny Side Site (36bd267), Central Pennsylvania, Douglas H. Macdonald, Eric P. Scuoteguazza, David L. Cremeens
Steatite On The Juniata: Early Pottery At The Sunny Side Site (36bd267), Central Pennsylvania, Douglas H. Macdonald, Eric P. Scuoteguazza, David L. Cremeens
Anthropology Faculty Publications
Archaeological excavations recovered early steatite-tempered pottery at the Sunny Side site (36BD267), Bedford County, Pennsylvania. The Sunny Side site is on a floodplain/terrace of Yellow Creek near its confluence with the Raystown Branch of the Juniata River. A 70-cm-wide hearth was excavated along with associated Selden Island steatite-tempered pottery and lithic debris at a depth of 94 cm below ground surface in a buried Ab horizon. A hickory wood charcoal sample from the hearth was dated to 3500±100 B.P. (CAL BC 2120 - 2090 and BC 2050 - 1540). The early pottery at the Sunny Side site confirms prior work …
Paraffin: An Economic And Ecological Alternative For Bone Conservation, Victoria E. Luksha
Paraffin: An Economic And Ecological Alternative For Bone Conservation, Victoria E. Luksha
Graduate Student Theses, Dissertations, & Professional Papers
Fragile bone materials are ubiquitous in archaeological museum and forensic settings. Although there are many chemical and industrial options for conservation, these may adversely affect the bone objects undergoing preservative treatment. Here, paraffin is explored as a biologically friendly alternative to bone material conservation. Modern domestic pig ribs were subjected to paraffin treatment and then to isotopic analysis to quantify and investigate the chemical effects of paraffin. Although the results showed that paraffin had a limited impact, the sample size proved too small to display the definitive parameters of paraffin’s effects. The results were nevertheless compelling enough to warrant more …
Corticosterone As A Mediator Of The Tradeoff Between Survival And Reproduction, Stephen Harold Patterson
Corticosterone As A Mediator Of The Tradeoff Between Survival And Reproduction, Stephen Harold Patterson
Graduate Student Theses, Dissertations, & Professional Papers
Organisms cannot simultaneously maximize their investment in survival and reproductive success, thus these traits are said to trade off against one another. The physiological mechanisms that help guide these investment decisions are not fully understood. Stress-induced corticosterone is a strong candidate mechanism, because it is thought to promote survival-oriented behavior and physiology at the expense of non-critical functions such as reproduction. In this dissertation, I studied multiple components of corticosterone physiology (baseline corticosterone and stress-induced corticosterone) in several species of passerine birds to address this question from a variety of angels. I first provide direct support for corticosterone playing a …
The Columbia Gardens Amusement Park: Company Sponsored Community In Butte, Montana, Matthew R. Carl
The Columbia Gardens Amusement Park: Company Sponsored Community In Butte, Montana, Matthew R. Carl
Graduate Student Theses, Dissertations, & Professional Papers
In 1899, William A. Clark, one of Butte, Montana’s famous “Copper Kings,” purchased 21 acres of land east of Butte, on which he created the Columbia Gardens amusement park. Clark ran his park at personal expense, refusing to charge admission and regularly offering special deals so that Butte residents, particularly children, could enjoy the park. After Clark’s death in 1925, his estate sold most of his Montana holdings, including the Columbia Gardens, to the Anaconda Copper Mining Company in 1928. Without the sentimental attachment to the park that Clark had had, the fact that the Columbia Gardens was not created …
Evaluating Repeat Photography In Documenting Natural And Cultural Landscape Changes: A Changing Crown Of The Continent Ecosystem Between 1899 And 2010, Dusty Leigh Waltner
Evaluating Repeat Photography In Documenting Natural And Cultural Landscape Changes: A Changing Crown Of The Continent Ecosystem Between 1899 And 2010, Dusty Leigh Waltner
Graduate Student Theses, Dissertations, & Professional Papers
Photography can be an invaluable tool in human geographical research, for example, to better understand the importance of place to people. Increasingly, geographers are looking at how photography can play an active role in the construction of geographical knowledge, that is, how photographs are seen rather than what they show. This study examines the use of repeat photography as a research method by conducting a case study on landscape change in the Crown of the Continent Ecosystem. Grounded in extensive archival research on the past, present, and future uses of photography as a research method, a repeat photography survey was …