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Articles 31 - 60 of 422
Full-Text Articles in Entire DC Network
Full Issue, Vol. 11
Monographs of the Western North American Naturalist
No abstract provided.
Reading Fluency And Gonoodle© Brain Breaks Among Elementary-Aged Children, Hannah Jeanne Wold
Reading Fluency And Gonoodle© Brain Breaks Among Elementary-Aged Children, Hannah Jeanne Wold
Theses and Dissertations
This study examines the immediate and chronic effects of physical activity (PA) breaks on reading fluency. While many teachers recognize the value of PA for increasing engagement and focus (getting the wiggles out) in academic endeavors, these results reveal increases in academic achievement in reading fluency are also possible.This study examines 384 second and third grade students with low income backgrounds from the Rocky Mountain region. A two-way analysis of variance (ANOVA) was used to examine the effects of chronic and acute brain breaks via GoNoodle© (McQuigg, 2013) on reading fluency and physical activity (steps). Between group differences were further …
Golden Eagle Predation On Endangered San Joaquin Kit Foxes, Brian L. Cypher, Kenneth A. Spencer, Tory L. Westall, Daniel E. Meade
Golden Eagle Predation On Endangered San Joaquin Kit Foxes, Brian L. Cypher, Kenneth A. Spencer, Tory L. Westall, Daniel E. Meade
Western North American Naturalist
Golden Eagles (Aquila chrysaetos) have been identified as a potential predator of endangered San Joaquin kit foxes (Vulpes macrotis mutica), but only one case of such predation has been confirmed. In a recent study on San Joaquin kit foxes, we documented 6 cases of putative predation by Golden Eagles on kit foxes and provided our evidence for each. Golden Eagle predation on kit foxes is most likely to occur in the spring when kit foxes and their pups are frequently aboveground during the day. Such predation is more likely to occur around the margins of the …
A Physics For Civilization, Arthus S. Iberall
A Physics For Civilization, Arthus S. Iberall
Comparative Civilizations Review
A highly accomplished polymath, Arthur Iberall (1918-2002) served as an executive board member of the ISCSC as well as a long-time member and a distinguished participant in the ISCSC annual meetings. He was an expert on complex systems thinking.
New Altitudinal Records For, And Ecomorphic Variation In, Two Freshwater Sponges (Porifera: Spongillidae: Spongilla Lacustris And Ephydatia Muelleri) From A Colorado, Usa, Alpine Lake, Scott J. Herrmann, Del Wayne R. Nimmo, Lynn M. Herrmann-Hoesing
New Altitudinal Records For, And Ecomorphic Variation In, Two Freshwater Sponges (Porifera: Spongillidae: Spongilla Lacustris And Ephydatia Muelleri) From A Colorado, Usa, Alpine Lake, Scott J. Herrmann, Del Wayne R. Nimmo, Lynn M. Herrmann-Hoesing
Western North American Naturalist
The primary objective of this article is to report the co-occurrence of Spongilla lacustris (Linnaeus 1759) and Ephydatia muelleri (Lieberkühn 1855) in an alpine Colorado lake whose altitude of 3580 m represents new elevation maximums for these sponges for Colorado and for the whole of North America. A secondary objective was to characterize the physicochemical conditions of the lake water. For many limnological parameters, heavy metals, and metalloids, new minimums are recorded, particularly for E. muelleri. Ecomorphic variation of atypical gemmuloscleres for E. muelleri and S. lacustris is documented with SEM micrographs. Even though all the encrusted “white colonies” of …
So . . . We're Going For A Walk: A Placed-Based Outdoor Art Experiential Learning Experience, Priscilla Anne Stewart
So . . . We're Going For A Walk: A Placed-Based Outdoor Art Experiential Learning Experience, Priscilla Anne Stewart
Theses and Dissertations
Schools in the United States often emphasize making children competitive in a global economy while neglecting the importance of developing citizens who are ecologically responsible. Problems of climate change, loss of biodiversity, mass extinctions and degradation of the natural environment, are often ignored. Some researchers have suggested that children lack unstructured play time in nature, have an increased amount of screen time, lack mindfulness, and are insulated from the natural world. Many children rarely have significant experience with nature's wildness. It is common for people to experience a sense of placelessness in the hyper-mobility of present times where "globalizing" agendas …
A Comparison Of Diurnal Resting Sites Used By Sylvilagus Audubonii And Lepus Californicus In The Chihuahuan Desert, Robert L. Harrison
A Comparison Of Diurnal Resting Sites Used By Sylvilagus Audubonii And Lepus Californicus In The Chihuahuan Desert, Robert L. Harrison
Western North American Naturalist
Sylvilagus audubonii (desert cottontail) and Lepus californicus (black-tailed jackrabbit) occur in sympatry in the southwestern United States and northern Mexico. During the daytime, both species occupy shallow excavations under shrubs known as forms. Comparisons of form and shrub characteristics between the 2 species can provide insights into connections between body size, physiology, and behavior. I examined forms of the 2 species in the Chihuahuan Desert in southern New Mexico, USA, from 2014 to 2016. In response to temperature, S. audubonii varied the structure of its forms and dug burrows, whereas L. californicus did not. Sylvilagus audubonii forms were most commonly …
Cytochrome Oxidase I Sequences From Northern And Southern California Suggest Cryptic Baetis (Ephemeroptera: Baetidae) Species, Natalie J. Stauffer-Olsen, Patrick M. O'Grady, Vincent H. Resh
Cytochrome Oxidase I Sequences From Northern And Southern California Suggest Cryptic Baetis (Ephemeroptera: Baetidae) Species, Natalie J. Stauffer-Olsen, Patrick M. O'Grady, Vincent H. Resh
Western North American Naturalist
The geographically widespread mayfly genus Baetis occurs from the subarctic to tropical regions of the world. Many of the 20 described Baetis species in North America are known to show cryptic species diversity. However, studies of Baetis that have examined morphology and genetic diversity have found mixed results in terms of cryptic species, with some studies indicating a complex of related species and others suggesting a single widespread species. We used Bayesian analyses, intra- and interspecific genetic diversity values, and median-joining haplotype networks to compare cytochrome oxidase I (COI) sequences from Baetis specimens from parts of northern and southern California …
Adult Whooping Crane (Grus Americana) Consumption Of Juvenile Channel Catfish (Ictalurus Punctatus) During The Avian Spring Migration In The Central Platte River Valley, Nebraska, Usa, Andrew J. Caven, Jenna Malzahn, Keith D. Koupal, Emma M. Brinley Buckley, Joshua D. Wiese, Rick Rasmussen, Carol Steenson
Adult Whooping Crane (Grus Americana) Consumption Of Juvenile Channel Catfish (Ictalurus Punctatus) During The Avian Spring Migration In The Central Platte River Valley, Nebraska, Usa, Andrew J. Caven, Jenna Malzahn, Keith D. Koupal, Emma M. Brinley Buckley, Joshua D. Wiese, Rick Rasmussen, Carol Steenson
Monographs of the Western North American Naturalist
Stopover sites provide important forage resources and protection from predators to the Aransas-Wood Buffalo population of Whooping Cranes (Grus americana) as they migrate 4000 km across the Great Plains each spring and fall. Given the Whooping Crane’s expansive migration corridor, sensitivity to human disturbance, small population size, and protected status under the Endangered Species Act, it is challenging to gather detailed information regarding the particular forage resources that the cranes exploit at various stopover locations. On 22 March 2018 we observed and photo-documented an adult Whooping Crane consuming at least 5 individual juvenile channel catfish (Ictalurus punctatus …
Sandhill Crane Use Of Riverine Roost Sites Along The Central Platte River In Nebraska, Usa, David M. Baasch, Patrick D. Farrell, Andrew J. Caven, Kelsey C. King, Jason M. Farnsworth, Chadwin B. Smith
Sandhill Crane Use Of Riverine Roost Sites Along The Central Platte River In Nebraska, Usa, David M. Baasch, Patrick D. Farrell, Andrew J. Caven, Kelsey C. King, Jason M. Farnsworth, Chadwin B. Smith
Monographs of the Western North American Naturalist
Wide channels with short bank vegetation, access to nearby foraging habitat, shallow water areas (deep), and absence of disturbance features are factors commonly associated with suitable roost sites for Sandhill Cranes (Antigone canadensis). However, since channel width has typically been evaluated independently of channel depth and flow, it is possible that use of narrow channels is not limited so much by a requirement for wider channels but by deeper water that flows through these narrow channels. We used a discrete-choice modeling framework and 9 years of roost location data to evaluate the influence of channel-width measures and flow …
Bobcat Abundance And Habitat Selection On The Utah Test And Training Range, Kyle David Muncey
Bobcat Abundance And Habitat Selection On The Utah Test And Training Range, Kyle David Muncey
Theses and Dissertations
Remote cameras have become a popular tool for monitoring wildlife. We used remote cameras to estimate bobcat (Lynx rufus) population abundance on the Utah Test and Training Range during two sample periods between 2015 and 2017. We used two statistical methods, closed capture mark-recapture (CMR) and mark-resight Poisson log-normal (PNE), to estimate bobcat abundance within the study area. We used the maximum mean distance moved method (MMDM) to calculate the effective sample area for estimating density. Additionally, we captured bobcats and estimated home range using minimum convex polygon (MCP) and kernel density estimation (KDE) methods. Bobcat abundance on the UTTR …
California Island Rediscovery: Building An Archive To Improve Conservation Today And Equip The Historical Ecologist Of Tomorrow, Scott A. Morrison, T. Scott Sillett, W. Chris Funk, Cameron K. Ghalambor, Torben C. Rick
California Island Rediscovery: Building An Archive To Improve Conservation Today And Equip The Historical Ecologist Of Tomorrow, Scott A. Morrison, T. Scott Sillett, W. Chris Funk, Cameron K. Ghalambor, Torben C. Rick
Western North American Naturalist
An understanding of how past conditions have shaped present-day ecological patterns and trends is critical to science-based conservation management. Unfortunately, the records, specimens, and objects historical ecologists need to help generate that understanding are often lacking. And because of a general underinvestment by society in systematic collection and museum curation, future historical ecologists may be similarly limited in their ability to investigate conditions regarding our present day. Given the importance of historical data and materials in contemporary conservation decision-making, we suggest it is incumbent upon resource managers and scientists to ask whether additional research efforts are needed to document past …
Horizon Scanning: Survey And Research Priorities For Coastal And Marine Systems Of The Northern Channel Islands, California, Mary G. Gleason, Jennifer E. Caselle, Chris Caldow, Russell Galipeau, Walter Heady, Corinne Laverty, Annie Little, David Mazurkiewicz, Eamon O'Byrne, Dirk Rosen, Stephen Whitaker
Horizon Scanning: Survey And Research Priorities For Coastal And Marine Systems Of The Northern Channel Islands, California, Mary G. Gleason, Jennifer E. Caselle, Chris Caldow, Russell Galipeau, Walter Heady, Corinne Laverty, Annie Little, David Mazurkiewicz, Eamon O'Byrne, Dirk Rosen, Stephen Whitaker
Western North American Naturalist
Historical marine ecology provides information on past ocean conditions and community structure that can inform current conservation and management. In an era of rapid global ocean changes, it is critical that managers and scientists ensure sufficient documentation of past and present conditions of resources they manage or study. Documenting, archiving, and preserving historic and contemporary data will provide their colleagues in the future with more information to make robust science-based management decisions. Using a workshop approach, we identified research and archiving priorities to enhance documentation of the past and present conditions of coastal and marine ecosystems of the northern Channel …
Equipping Tomorrow's Historical Ecologist: Priorities For Documenting Conditions Of The Terrestrial Fauna Of Santa Cruz Island, California, Christina L. Boser, T. Scott Sillett, Paul W. Collins, Kathryn R. Faulkner, W. Chris Funk, Cameron K. Ghalambor, Lyndal Laughrin, Gregory B. Pauly, Jeanne M. Robertson, Robyn Shea, Winston Vickers
Equipping Tomorrow's Historical Ecologist: Priorities For Documenting Conditions Of The Terrestrial Fauna Of Santa Cruz Island, California, Christina L. Boser, T. Scott Sillett, Paul W. Collins, Kathryn R. Faulkner, W. Chris Funk, Cameron K. Ghalambor, Lyndal Laughrin, Gregory B. Pauly, Jeanne M. Robertson, Robyn Shea, Winston Vickers
Western North American Naturalist
Historical ecological research provides valuable insights for contemporary conservation management. Gaps in historical records, however, can limit the utility of that research. Future conservationists may therefore find themselves disadvantaged by the current societal trend of underinvestment in systematic collection of museum specimens and natural history information. To reduce that risk, we asked what managers and scientists could do today to better document the past and present conditions of Santa Cruz Island, California, as a means to improve both contemporary and future conservation. We focused our inquiry on the island’s terrestrial fauna, which includes numerous taxa of conservation concern. Here we …
Comparison Of Estimators For Monitoring Long-Term Population Trends In Deer Mice, Peromyscus Maniculatus, On The California Channel Islands, Catherin A. Schwemm, Charles A. Drost, John L. Orrock, Timothy J. Coonan, Thomas R. Stanley
Comparison Of Estimators For Monitoring Long-Term Population Trends In Deer Mice, Peromyscus Maniculatus, On The California Channel Islands, Catherin A. Schwemm, Charles A. Drost, John L. Orrock, Timothy J. Coonan, Thomas R. Stanley
Western North American Naturalist
Capture-recapture methods are commonly used to estimate abundance and density of wild animal populations. Although a variety of sophisticated analytical techniques are available to evaluate capture-recapture data, vertebrate monitoring programs often lack the resources (e.g., time, personnel, and/or analytical expertise) to apply these methods. As an alternative, simple population indices, such as counts of unique individuals, may provide sufficient information to detect meaningful changes in population size. In this study we investigated whether a population index, easily generated from mark-recapture data under all conditions, might be used to provide valid ecological information for managers interested in long-term population trends of …
An Ecological And Distributional Analysis Of Great Basin Bristlecone Pine (Pinus Longaeva), Gregory Watson Taylor
An Ecological And Distributional Analysis Of Great Basin Bristlecone Pine (Pinus Longaeva), Gregory Watson Taylor
Theses and Dissertations
Understanding the impacts of climate change is critical for improving the conservation and management of ecosystems worldwide. Ecosystems vary along a precipitation and temperature gradient, ranging from tropical jungles to arid deserts. The Great Basin is a semi-arid eco-region that is found within the western United States. Plant communities within the Great Basin range from sagebrush valleys to sub-alpine conifer forests found at high elevation areas. It is predicted that the Great Basin will experience prolonged periods of drought, more intense fires, and greater variability in average annual and monthly precipitation, all in response to changes in climate patterns. At …
Relative Abundance Of Pond Snails In Turnbull National Wildlife Refuge, Washington, And The Spread Of An Invasive Snail, Michele D. Larson, Christina M. Torrieri, A. Ross Black
Relative Abundance Of Pond Snails In Turnbull National Wildlife Refuge, Washington, And The Spread Of An Invasive Snail, Michele D. Larson, Christina M. Torrieri, A. Ross Black
Western North American Naturalist
Freshwater gastropods comprise a diverse and highly imperiled taxonomic group that is threatened by anthropogenic factors including the introduction of nonnative species. We surveyed 10 wetland ponds in Turnbull National Wildlife Refuge to assess the possible expansion of the nonnative European ear snail (Radix auricularia) and to determine the genus richness and relative abundance of native gastropods. D-frame dip nets were used to sample gastropods at 4 locations in each pond. Six genera of gastropods were found, including R. auricularia in 6 ponds where it was not previously known. Radix auricularia is now the dominant genus in Middle …
Toward Understanding Posttraumatic Stress And Depression Among Trauma-Affected Widows In Sri Lanka, Jessica E. Lambert, Alyssa Banford Witting, Spencer James, Lakmal Ponnamperuma, Thulitha Wickrama
Toward Understanding Posttraumatic Stress And Depression Among Trauma-Affected Widows In Sri Lanka, Jessica E. Lambert, Alyssa Banford Witting, Spencer James, Lakmal Ponnamperuma, Thulitha Wickrama
Faculty Publications
Objective: In this study, we applied conservation of resources theory (Hobfoll, 1989) to explain high rates of depression and posttraumatic stress symptoms (PTSS) among war- and disaster-affected Tamil widows in the Eastern Province of Sri Lanka. We hypothesized exposure to potentially traumatic events and severity of current contextual problems would influence PTSS and depressive symptoms directly and indirectly through loss of psychological (view of self), environmental (sense of community), and energy (physical health) resources. Method: Trained research assistants interviewed a convenience sample (N = 381) of women, using established measures of the constructs of interest. Data were analyzed using …
Small Mammal Diversity, Rattlesnake Demographics, And Resource Utilization In The Great Basin: Implications For Management And Stable Isotope Proxies, Bryan T. Hamilton
Small Mammal Diversity, Rattlesnake Demographics, And Resource Utilization In The Great Basin: Implications For Management And Stable Isotope Proxies, Bryan T. Hamilton
Theses and Dissertations
Plant carbon isotopes were used to track assimilation of riparian resources by small mammals. Voles and shrews derived significant portions of their carbon from riparian vegetation. Deer and harvest mice were abundant in riparian habitat but assimilated little riparian vegetation indicating that the riparian corridor provided resources other than food. This is first use of stable carbon isotopes to trace riparian resources into a vertebrate community. Conifer encroachment in sagebrush ecosystems negatively affects many wildlife populations. Conifer removal is recommended across millions of hectares in the Great Basin. However the effects of conifer encroachment and conifer removal are unknown for …
Estimates Of Habitat Use By Rabbits (Sylvilagus Spp.) From Fecal Pellet Counts Varies By Plot Design In Southern California, Sean P. Dunagan, Tim J. Karels
Estimates Of Habitat Use By Rabbits (Sylvilagus Spp.) From Fecal Pellet Counts Varies By Plot Design In Southern California, Sean P. Dunagan, Tim J. Karels
Western North American Naturalist
Studies of rabbits and hares often use fecal pellet counts to estimate population density, create indices of abundance, and monitor habitat use, because fecal pellet counts are more easily deployed and less labor intensive than visual surveys and live trapping. In some habitats, plot size and shape can affect the measured pellet density and the resulting estimates of habitat use by rabbits. We compared rabbit (Sylvilagus spp.) fecal pellet density estimates derived from 0.155-m2 rectangular, 0.155-m2 circular, 1-m2 square, and 1-m2 circular plots in southern California chaparral and coastal sage scrub communities to evaluate habitat …
Effects Of Feral Horse Herds On Rangeland Plant Communities Across A Precipitation Gradient, Lauren E. Baur, Kathryn A. Schoenecker, Melinda D. Smith
Effects Of Feral Horse Herds On Rangeland Plant Communities Across A Precipitation Gradient, Lauren E. Baur, Kathryn A. Schoenecker, Melinda D. Smith
Western North American Naturalist
Feral horses are widespread in the western United States, with the majority of feral horse herds found in the Great Basin. There is a federal mandate to manage these herds in order to maintain “ecological balance”; however, understanding of the specific effects of feral horse grazing on rangeland plant communities in this region is incomplete. To address this research gap, we utilized long-term grazing exclosures and fenceline contrasts to evaluate the impacts of feral horses on several plant community variables (diversity, richness, dominance, and biomass) and species composition. Because the effects of grazing can vary with site precipitation and productivity, …
Horizon Scanning: Survey And Research Priorities For Cultural, Historical, And Paleobiological Resources Of Santa Cruz Island, California, Torben C. Rick, Todd J. Braje, Jon M. Erlandson, Kristina M. Gill, Laura Kirn, Lynn Mclaren-Dewey
Horizon Scanning: Survey And Research Priorities For Cultural, Historical, And Paleobiological Resources Of Santa Cruz Island, California, Torben C. Rick, Todd J. Braje, Jon M. Erlandson, Kristina M. Gill, Laura Kirn, Lynn Mclaren-Dewey
Western North American Naturalist
Santa Cruz Island contains a remarkable array of cultural and biological resources and a rich tradition of research across the social and biological sciences and humanities. Given dramatic changes in climate forecast in the coming decades of the Anthropocene, however, many questions remain about the sustainability and future of island ecosystems and cultural resources. Here, we focus on a new interdisciplinary initiative, Island Rediscovery (IR), that was the subject of 2 recent workshops. Drawing on a variety of disciplines and approaches, IR seeks to utilize research on Santa Cruz Island’s past and present to help better prepare for the future …
Response To Drought Of A Stream Fish Assemblage In A High Elevation Stream In The Intermountain West, Richard M. Simkins
Response To Drought Of A Stream Fish Assemblage In A High Elevation Stream In The Intermountain West, Richard M. Simkins
Theses and Dissertations
One of the most influential disturbances for stream fish assemblages is large-scale declines in flow caused by periods of drought. Although stream characteristics are known to influence the response of stream fishes to drought, we asked if ecological traits of stream fishes determine, in part, their population level response to drought. To test for ecological trait-based responses to drought in a stream fish assemblage, we quantified species abundances over a period of 5 years that represented a wet to dry period. We sampled stream fishes in Yellow Creek, Wyoming, USA, a high elevation stream dependent on snow-storage for most of …
A First Survey Of Metazoan Parasites In The Fishes Of Lake Powell, Utah, Aaron M. Brooksby, Mehmet Cemal Oguz, Mark C. Belk
A First Survey Of Metazoan Parasites In The Fishes Of Lake Powell, Utah, Aaron M. Brooksby, Mehmet Cemal Oguz, Mark C. Belk
Western North American Naturalist
Lake Powell (Colorado River drainage, Utah and Arizona, USA) is an important and unique fishery comprising several nonnative fishes. There are no previous studies of the parasites of the fishes of Lake Powell. We provide a general survey of the metazoan parasites found in the numerically dominant fish species of the reservoir. We collected and surveyed for parasites in 236 fishes of 8 species. We found 832 parasites comprising 13 species. All of the parasite species we found are widespread throughout North America and other parts of the world. Six of the 13 species of parasites we found have been …
Twelve Years Of High-Resolution Near-Surface Radiometer Data Provides Insight Into End-Of-Season Controls In A Dry Grassland, Lynn M. Moore, William K. Lauenroth
Twelve Years Of High-Resolution Near-Surface Radiometer Data Provides Insight Into End-Of-Season Controls In A Dry Grassland, Lynn M. Moore, William K. Lauenroth
Western North American Naturalist
The onset of plant dormancy has proven difficult to explain in nearly all ecosystems. Most research has focused on the end-of-season dynamics of deciduous ecosystems, where leaf coloration and leaf fall are the primary phenological responses. More complex are the end-of-season dynamics of grasslands, where the mechanism of dormancy is a gradual response to climatic variables. These complications are magnified in dry grasslands, where the effects of temperature on phenology are modulated by the availability of soil water. Our objectives were to identify the primary drivers influencing the timing of end of season on the shortgrass steppe and determine if …
Interconnectedness, Complicity And Ambiguity: Reading With Dark Ecology, Rachel Dene Whipple
Interconnectedness, Complicity And Ambiguity: Reading With Dark Ecology, Rachel Dene Whipple
Theses and Dissertations
There are many aspects of ecological thinking. When reading texts through a lens of dark ecology, certain conflicts that arise from the imposition of human expectations on natural systems are revealed. These include interconnectedness, complicity, and ambiguities. Within a system, boundaries are contingent and transitory. Beginnings and ends are gradual, not definite. Ecological systems change over time, but it is a category error to imagine that change represents progress or to assume a teleological purpose. While there are hierarchies of power, and different roles, no species is, ecologically speaking, more advanced than another. Ecological criticism focuses on interconnectedness, complicity, and …
Population Structure, Genetic Diversity, Geographic Distribution, And Morphology Of Two Boechera (Brassicaceae) Parental Species (Boechera Thompsonii And Boechera Formosa) And Of Their Resultant Hybrid Boechera Duchesnensis, Christina Elizabeth Fox Call
Population Structure, Genetic Diversity, Geographic Distribution, And Morphology Of Two Boechera (Brassicaceae) Parental Species (Boechera Thompsonii And Boechera Formosa) And Of Their Resultant Hybrid Boechera Duchesnensis, Christina Elizabeth Fox Call
Theses and Dissertations
Background: Over the relatively short period of its evolutionary history, Boechera (Brassicaceae) has undergone rapid radiation that has produced 70+ morphologically distinct, sexual diploids. However, reproductive isolation has moved more slowly than morphological divergence in this group and the diploids appear to hybridize frequently where they coexist. Boechera duchesnensis appears to be the result of hybridization between its putative parents Boechera thompsonii and Boechera formosa. Objectives: The objectives of this study are to (i) analyze and document genetic diversity patterns in the population structure, - including allelic and heterozygosity frequencies - of B. thompsonii and B. formosa …
Lichen Inventory Of White Rocks Open Space (City Of Boulder, Colorado), Erin A. Tripp
Lichen Inventory Of White Rocks Open Space (City Of Boulder, Colorado), Erin A. Tripp
Western North American Naturalist
A lichen inventory of White Rocks Open Space (City of Boulder, CO), a unique outcropping of exposed unstable sandstones, is presented. White Rocks is an ecologically important, ~40.5-ha (100-acre) protected area whose biological significance is in part attributable to geological and climatological history as well as degree of preservation, but also because it represents a biodiversity reservoir in a sea of agriculture and urban development. This inventory resulted in documentation of 56 species, including 1 new record to the United States, 1 new record to Colorado, 2 species new to science, and 2 additional species potentially new to science pending …
High Salinity Stabilizes Bacterial Community Composition And Activity Through Time, Tylan Wayne Magnusson
High Salinity Stabilizes Bacterial Community Composition And Activity Through Time, Tylan Wayne Magnusson
Theses and Dissertations
Dormancy is a plausible strategy for bacteria to overcome the effects of temporal fluctuations in resources or stresses and await more “optimal” conditions to resume metabolic activity and growth. Seasonal changes in environmental conditions force microbes to adjust their metabolic activity accordingly, and community composition drastically shifts. In extreme environments, however, the overriding effects of a constant stress may constrain the need or benefit of bacteria entering dormancy. In hypersaline lakes, high metabolic activity is required to maintain adaptations that permit survival. Sampling from six lakes on a salinity gradient (0.05% – 30.3%), we measured seasonal fluctuations in bacterial dormancy …
North Versus South: The Effects Of Foreign Direct Investment And Historical Legacies On Poverty Reduction In Post-Đổi Mới Vietnam, Scott R. Sanders
North Versus South: The Effects Of Foreign Direct Investment And Historical Legacies On Poverty Reduction In Post-Đổi Mới Vietnam, Scott R. Sanders
Faculty Publications
This research examines the factors that account for variance in provincial poverty reduction rates between 2002 and 2008 in Vietnam. In particular, this paper uses spatial regression modeling to show that foreign direct investment (FDI) and the capitalist legacies of southern Vietnam significantly affected provincial poverty reduction during this time period. These findings suggest that although Vietnam as a whole has benefited from post-Đổi Mới economic reform and FDI, the historical capitalist legacies of the former Republic of Vietnam played a strong role in aiding provinces in the south in attracting FDI and subsequently reducing provincial poverty.