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Articles 1 - 30 of 132
Full-Text Articles in Life Sciences
Moose-Wilson Corridor Use Levels, Type, Patterns And Impacts In Grand Teton National Park- Summer/Fall 2014 Technical Report, Christopher Monz, A. D'Antonio, K. Heaslip
Moose-Wilson Corridor Use Levels, Type, Patterns And Impacts In Grand Teton National Park- Summer/Fall 2014 Technical Report, Christopher Monz, A. D'Antonio, K. Heaslip
Christopher Monz
No abstract provided.
Recreation Impact Monitoring Analysis And Protocol Development, Glacier Bay National Park, K. C. Goonan, Christopher Monz, B. Bruno, T. Lewis
Recreation Impact Monitoring Analysis And Protocol Development, Glacier Bay National Park, K. C. Goonan, Christopher Monz, B. Bruno, T. Lewis
Christopher Monz
No abstract provided.
An Application Of Recreation Resource Assessment Techniques To Inform Management Action In An Urban-Proximate Natural Area, Ashley D'Antonio, Christopher Monz, Nell Larson, Amy Rohman
An Application Of Recreation Resource Assessment Techniques To Inform Management Action In An Urban-Proximate Natural Area, Ashley D'Antonio, Christopher Monz, Nell Larson, Amy Rohman
Christopher Monz
No abstract provided.
The Ecological Implications Of Visitor Transportation In Parks And Protected Areas: Examples From Research In Us National Parks, Christopher Monz, Ashley D'Antonio, Steve Lawson, Jesse Barber, Peter Newman
The Ecological Implications Of Visitor Transportation In Parks And Protected Areas: Examples From Research In Us National Parks, Christopher Monz, Ashley D'Antonio, Steve Lawson, Jesse Barber, Peter Newman
Christopher Monz
The demand for recreation and nature-based tourism experiences in parks and protected areas continues to grow in many locations worldwide and in response, many parks are employing transit services designed to improve visitor access. Transit services (e.g., public bus service) are a component of the overall park transportation system and are very desirable in park settings as they yield many advantages over personal auto access including reduced congestion in parking areas, reduced carbon footprint, and an enhanced visitor experience. However, a growing body of research also suggests that the delivery of visitors via transit to destinations within a park or …
Contrasting Effects Of Different Mammalian Herbivores On Sagebrush Plant Communities, Kari E. Veblen
Contrasting Effects Of Different Mammalian Herbivores On Sagebrush Plant Communities, Kari E. Veblen
Kari E. Veblen
Herbivory by both grazing and browsing ungulates shapes the structure and functioning of terrestrial ecosystems worldwide, and both types of herbivory have been implicated in major ecosystem state changes. Despite the ecological consequences of differences in diets and feeding habits among herbivores, studies that experimentally distinguish effects of grazing from spatially co-occurring, but temporally segregated browsing are extremely rare. Here we use a set of long-term exclosures in northern Utah, USA, to determine how domestic grazers vs. wild ungulate herbivores (including browsers and mixed feeders) affect sagebrush-dominated plant communities that historically covered ~62 million ha in North America. We sampled …
Update On Michigan Biomaterials Initiative, October 31, 2014, Terry L. Sharik
Update On Michigan Biomaterials Initiative, October 31, 2014, Terry L. Sharik
Terry L. Sharik
Powerpoint Presented the 2014 Biomaterial Conference from Forest Resources & Environmental Sciences, Michigan Tech
Great Salt Lake's Two Deep Brine Layers, Wayne A. Wurtsbaugh
Great Salt Lake's Two Deep Brine Layers, Wayne A. Wurtsbaugh
Wayne A. Wurtsbaugh
Two major causeways that divide the Great Salt Lake have radically changed salt balances in different sections of the lake, and have caused deep brine layers to form. For you scrabble buffs, limnologists call these layers “monimolimnions”. In 1959 the Southern Pacific Railway built a 13- mile rock-fill causeway across the main lake, dividing it in half. T
Native And Domestic Browsers And Grazers Reduce Fuels, Fire Temperatures, And Acacia-Ant Mortality In An African Savanna, Kari E. Veblen
Native And Domestic Browsers And Grazers Reduce Fuels, Fire Temperatures, And Acacia-Ant Mortality In An African Savanna, Kari E. Veblen
Kari E. Veblen
Despite the importance of fire and herbivory in structuring savanna systems, few replicated experiments have examined the interactive effects of herbivory and fire on plant dynamics. In addition, the effects of fire on associated ant-tree mutualisms have been largely unexplored. We carried out small controlled burns in each of 18 herbivore treatment plots of the Kenya Long-term Exclosure Experiment (KLEE), where experimentally excluding elephants has resulted in 42% greater tree densities. The KLEE design includes six different herbivore treatments that allowed us to examine how different combinations of megaherbivore wildlife, mesoherbivore wildlife, and cattle affect fire temperatures and subsequent loss …
Monitoring Of Livestock Grazing Effects On Bureau Of Land Management Land, Kari E. Veblen
Monitoring Of Livestock Grazing Effects On Bureau Of Land Management Land, Kari E. Veblen
Kari E. Veblen
Public land management agencies, such as the Bureau of Land Management (BLM), are charged with managing rangelands throughout the Western United States for multiple uses such as livestock grazing and conservation of sensitive species and their habitats. Monitoring of condition and trends of these rangelands, particularly with respect to effects of livestock grazing, provide critical information for effective management of these multi-use landscapes. We therefore investigated the availability of livestock grazing-related quantitative monitoring data and qualitative region-specific Land Health Standards (LHS) data across BLM grazing allotments in the Western United States. We then queried university and federal rangeland science experts …
Extending A Geographic Lens Towards Climate Justice, Part 2: Climate Action, Claudia Radel
Extending A Geographic Lens Towards Climate Justice, Part 2: Climate Action, Claudia Radel
Claudia Radel
There has been a recent increase of interest within the academic literature on the justice issues posed by climate change and the human responses to its present and forecasted effects. In two parts (here and in a previous article), we review and synthesize the recent literature by asking what climate justice concerns have been identified within three related realms: (i) the characterization of climate change itself and the assignment of responsibility for that change; (ii) the differential or uneven impacts of climate change; and (iii) the actions taken to address the problems associated with climate change, including both mitigation and …
Recent Advances In Recreation Ecology And The Implications Of Different Relationships Between Recreation Use And Ecological Impacts, Christopher Monz, C. M. Pickering, W. Hadwen
Recent Advances In Recreation Ecology And The Implications Of Different Relationships Between Recreation Use And Ecological Impacts, Christopher Monz, C. M. Pickering, W. Hadwen
Christopher Monz
No abstract provided.
Enhancing Theutility Of Visitor Impact Assessment In Parks And Protected Areas: A Combined Social-‐‐ Ecological Approach, A. D'Antonio, Christopher Monz, P. Newman, S. Lawson, D. Taff
Enhancing Theutility Of Visitor Impact Assessment In Parks And Protected Areas: A Combined Social-‐‐ Ecological Approach, A. D'Antonio, Christopher Monz, P. Newman, S. Lawson, D. Taff
Christopher Monz
No abstract provided.
Biotic Acceptance In Introduced Amphibians And Reptiles In Europe And North America, Karen H. Beard
Biotic Acceptance In Introduced Amphibians And Reptiles In Europe And North America, Karen H. Beard
Karen H. Beard
Aim: The biotic resistance hypothesis argues that complex plant and animal communities are more resistant to invasion than simpler communities. Conversely, the biotic acceptance hypothesis states that non-native and native species richness are positively related. Most tests of these hypotheses at continental scales, typically conducted on plants, have found support for biotic acceptance. We tested these hypotheses on both amphibians and reptiles across Europe and North America. Location: Continental countries in Europe and states/provinces in North America. Methods: We used multiple linear regression models to determine which factors predicted successful establishment of amphibians and reptiles in Europe and North America, …
Megaherbivores And Cattle Alter Edge Effects Around Ecosystem Hotspots In An African Savanna, Kari E. Veblen
Megaherbivores And Cattle Alter Edge Effects Around Ecosystem Hotspots In An African Savanna, Kari E. Veblen
Kari E. Veblen
Wild mammalian herbivores and cattle are fundamental drivers of African savanna ecosystems and have strong impacts on woody vegetation. However, few experimental studies have investigated the separate and combined influences of different large herbivores on spatial vegetation patterning. In East Africa, temporary cattle corrals (bomas) develop after abandonment into productive, treeless ‘glades’ that attract both domestic and wild herbivores. Edges of glades exhibit unusually high densities of large trees. We used a long-term, broad-scale manipulative experiment to test whether megaherbivores (elephants and giraffes), wild meso-herbivores (15–1000 kg), or cattle caused shifts in woody plant abundances in glade edges. We also …
Impacts Of Traditional Livestock Corrals On Woody Plant Communities In An East African Savanna, Kari E. Veblen
Impacts Of Traditional Livestock Corrals On Woody Plant Communities In An East African Savanna, Kari E. Veblen
Kari E. Veblen
No abstract provided.
Pocket Guide To Sagebrush, Leila M. Shultz
How Sanak Aleut Fit Into The Intertidal Food Web, Jennifer A. Dunne, Spencer Wood, Roly Russell, Nancy Huntly, Matthew Betts, Herbert Maschner
How Sanak Aleut Fit Into The Intertidal Food Web, Jennifer A. Dunne, Spencer Wood, Roly Russell, Nancy Huntly, Matthew Betts, Herbert Maschner
Nancy Huntly
No abstract provided.
The Ecological Interactions Of Sanak, Nancy Huntly, Spencer Wood, Roly Russell
The Ecological Interactions Of Sanak, Nancy Huntly, Spencer Wood, Roly Russell
Nancy Huntly
No abstract provided.
The Remarkable Life Of Sanak, Roly Russell, Nancy Huntly, Spencer Wood, Bruce Finney, Dieta Hanson
The Remarkable Life Of Sanak, Roly Russell, Nancy Huntly, Spencer Wood, Bruce Finney, Dieta Hanson
Nancy Huntly
No abstract provided.
Detection Probability Of Two Introduced Frogs In Hawaii: Implications For Assessing Non-Native Species Distributions, Karen H. Beard
Detection Probability Of Two Introduced Frogs In Hawaii: Implications For Assessing Non-Native Species Distributions, Karen H. Beard
Karen H. Beard
Two nonnative Caribbean frogs, the Puerto Rican coqui and the Cuban greenhouse frog, recently invaded Hawaii. Because of its louder breeding call, management efforts have focused on the coqui, while little has been done to address the more cryptic greenhouse frog, even though it may be as widespread and have similar ecological impacts. The goal of this research was to determine the distribution and detection probability of both species on the island of Hawaii. We conducted a breeding call presence/absence survey at 446 sites every 2 km along major road networks. We re-surveyed 125 sites twice to determine detection and …
Use Of Pre-S Protein-Containing Hepatitis B Virus Surface Antigens And A Powerful Adjuvant To Develop An Immune Therapy For Chronic Hepatitis B Virus Infection, J S. Yum, B C. Ahn, H J. Jo, D Y. Kim, K H. Kim, H S. Kim, Y C. Sung, J Yoon, John D. Morrey, H M. Moon
Use Of Pre-S Protein-Containing Hepatitis B Virus Surface Antigens And A Powerful Adjuvant To Develop An Immune Therapy For Chronic Hepatitis B Virus Infection, J S. Yum, B C. Ahn, H J. Jo, D Y. Kim, K H. Kim, H S. Kim, Y C. Sung, J Yoon, John D. Morrey, H M. Moon
John D. Morrey
A hepatitis B virus (HBV) vaccine has been developed using a new adjuvant and HBV surface antigens produced from a CHO cell line. The purified HBV surface antigens are composed of L protein, M protein, and S protein in a mixture of 20- and 40-nm diameter particles and filamentous forms. This HBV surface antigen, formulated with L-pampo, a proprietary adjuvant, induced 10 times more antibody than the same antigen with alum and was capable of inducing strong immune responses in three different HBV transgenic mice. In spite of the presence of a large amount of HBV antigen in the blood, …
Respiratory Insufficiency Correlated Strongly With Mortality Of Rodents Infected With West Nile Virus, John D. Morrey, V Siddharthan, H Wang, J O. Hall
Respiratory Insufficiency Correlated Strongly With Mortality Of Rodents Infected With West Nile Virus, John D. Morrey, V Siddharthan, H Wang, J O. Hall
John D. Morrey
West Nile virus (WNV) disease can be fatal for high-risk patients. Since WNV or its antigens have been identified in multiple anatomical locations of the central nervous system of persons or rodent models, one cannot know where to investigate the actual mechanism of mortality without careful studies in animal models. In this study, depressed respiratory functions measured by plethysmography correlated strongly with mortality. This respiratory distress, as well as reduced oxygen saturation, occurred beginning as early as 4 days before mortality. Affected medullary respiratory control cells may have contributed to the animals' respiratory insufficiency, because WNV antigen staining was present …
Yosemite National Park Meadow Use And Impact Study, Christopher Monz, A. D'Antonio
Yosemite National Park Meadow Use And Impact Study, Christopher Monz, A. D'Antonio
Christopher Monz
No abstract provided.
An Assessment Of Usda Forest Service Wilderness In Colorado: Manager's Perceptions Of Conditions And Remoteness Modeling, Christopher Monz
An Assessment Of Usda Forest Service Wilderness In Colorado: Manager's Perceptions Of Conditions And Remoteness Modeling, Christopher Monz
Christopher Monz
No abstract provided.
Yosemite National Park Trampling Study. Final Project Report., Christopher Monz, A. D'Antonio
Yosemite National Park Trampling Study. Final Project Report., Christopher Monz, A. D'Antonio
Christopher Monz
No abstract provided.
Coqui Frog Invasions Change Invertebrate Communities In Hawaii, Karen H. Beard
Coqui Frog Invasions Change Invertebrate Communities In Hawaii, Karen H. Beard
Karen H. Beard
The Puerto Rican coqui frog (Eleutherodactylus coqui) invaded Hawaii in the late 1980s. Because the coqui reaches high densities and consumes large quantities of invertebrates, it was hypothesized to change invertebrate communities where it invades. Previous research found that coquis can change invertebrate communities, but these studies used highly manipulative, small-scale experiments. The objective of this research was to determine whether coquis create community-level changes in invertebrate communities at the landscape scale. We collected leaf litter, flying, and foliage invertebrates on both sides of 15 coqui invasion fronts across the island of Hawaii. Multivariate analyses show that coquis are associated …
Plant-Soil Feedbacks Provide An Additional Explanation For Diversity-Productivity Relationships, A. Kulmatiski, Karen H. Beard, J. Heavilin
Plant-Soil Feedbacks Provide An Additional Explanation For Diversity-Productivity Relationships, A. Kulmatiski, Karen H. Beard, J. Heavilin
Karen H. Beard
Plant-soil feedbacks (PSFs) have gained attention for their role in plant community dynamics, but their role in productivity has been overlooked. We developed and tested a biomass-specific, multispecies model to examine the role of PSFs in diversity-productivity relationships. The model predicts a negative relationship between PSFs and overyielding: plants with negative PSFs grow more in communities than in monoculture (i.e., overyield) and plants with positive PSFs grow less in communities than in monoculture (i.e., underyield). This effect is predicted to increase with diversity and saturate at low species richness because the proportion of ‘self-cultivated’ soils rapidly decreases as species are …
Coastal Campsite Monitoring Protocol- Kenai Fjords National Park, Christopher Monz
Coastal Campsite Monitoring Protocol- Kenai Fjords National Park, Christopher Monz
Christopher Monz
No abstract provided.
Relative Changes In Krillabundance Inferred From Antarctic Fur Seal, T. Huang, L. Sun, John M. Stark, Y. Wang, Z. Cheng, Q. Yang, S. Sun
Relative Changes In Krillabundance Inferred From Antarctic Fur Seal, T. Huang, L. Sun, John M. Stark, Y. Wang, Z. Cheng, Q. Yang, S. Sun
John M. Stark
No abstract provided.
Autonomic Nervous Dysfunction In Hamsters Infected With West Nile Virus, H Wang, V Siddharthan, J O. Hall, John D. Morrey
Autonomic Nervous Dysfunction In Hamsters Infected With West Nile Virus, H Wang, V Siddharthan, J O. Hall, John D. Morrey
John D. Morrey
Clinical studies and case reports clearly document that West Nile virus (WNV) can cause respiratory and gastrointestinal (GI) complications. Other functions controlled by the autonomic nervous system may also be directly affected by WNV, such as bladder and cardiac functions. To investigate how WNV can cause autonomic dysfunctions, we focused on the cardiac and GI dysfunctions of rodents infected with WNV. Infected hamsters had distension of the stomach and intestines at day 9 after viral challenge. GI motility was detected by a dye retention assay; phenol red dye was retained more in the stomachs of infected hamsters as compared to …