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Articles 1 - 30 of 48
Full-Text Articles in Life Sciences
The Influence Of Topographic And Dynamic Cyclic Variables On The Distribution Of Small Cetaceans In A Shallow Coastal System, Marijke N. De Boer, Mark P. Simmonds, Peter J.H. Reijnders, Geert Aarts
The Influence Of Topographic And Dynamic Cyclic Variables On The Distribution Of Small Cetaceans In A Shallow Coastal System, Marijke N. De Boer, Mark P. Simmonds, Peter J.H. Reijnders, Geert Aarts
Mark P. Simmonds, OBE
The influence of topographic and temporal variables on cetacean distribution at a fine-scale is still poorly understood. To study the spatial and temporal distribution of harbour porpoise Phocoena phocoena and the poorly known Risso’s dolphin Grampus griseus we carried out land-based observations from Bardsey Island (Wales, UK) in summer (2001–2007). Using Kernel analysis and Generalized Additive Models it was shown that porpoises and Risso’s appeared to be linked to topographic and dynamic cyclic variables with both species using different core areas (dolphins to the West and porpoises to the East off Bardsey). Depth, slope and aspect and a low variation …
Ciliates Of Sagebrush-Steppe Soils Of Southwestern Idaho: Species Richness And Its Relationship To Changed Soil Variables After Wildfire Events, Laura G. Wendell
Ciliates Of Sagebrush-Steppe Soils Of Southwestern Idaho: Species Richness And Its Relationship To Changed Soil Variables After Wildfire Events, Laura G. Wendell
Boise State University Theses and Dissertations
I conducted a pilot study to examine species richness of terrestrial ciliates associated with big sagebrush habitat (Artemisia tridentata) in southwestern Idaho, USA. As wildland fires are a naturally occurring disturbance in this area, soil variables associated with these fires (% C, % N, pH, soil texture, and % clay) were measured at three sites, both in burned and unburned areas. These soil characteristics were compared to corresponding ciliate diversity and ratios of r-selected colpodeans to K-selected polyhymenophorans (C/P) in non-flooded Petri dish preparations. A total of 85 ciliate taxa were observed across the three sites, including …
Population Genetics, Distributions And Phenology Of Bombus Latreille, 1802 And Xylocopa Latreille, 1802 (Hymenoptera: Apidae), Amber Dawn Tripodi
Population Genetics, Distributions And Phenology Of Bombus Latreille, 1802 And Xylocopa Latreille, 1802 (Hymenoptera: Apidae), Amber Dawn Tripodi
Graduate Theses and Dissertations
This work addresses multiple knowledge gaps in bee ecology, population health and phylogeography in order to provide insights into the changing distributions of native bees. A comparison of Arkansas bumble bee records mirrors range-wide surveys, with records of stable species (Bombus bimaculatus Cresson, 1863 and B. impatiens Cresson, 1863) increasing three-fold, and records of the declining B. pensylvanicus (DeGeer, 1773) dropping to 60% of historical levels. However, nationally-recommended conservation-genetics tools did not mirror these results on a regional level. Stable and declining species had equivalent genetic diversity in samples from Arkansas and Tennessee (HS range: 0.46-0.63). Diploid males, …
Turning Up The Heat On The Little Things That Run The World: Evaluating The Impacts Of Climate Change On Ant Biodiversity In The Temperate Forest Communities Of The Northeastern United States, Israel Del Toro
Doctoral Dissertations
Climatic change threatens biodiversity worldwide. In the forests of the northeastern United States, climate change is expected to increase mean annual temperatures by up to 4.5˚C and change precipitation seasonality. These changes in climate are likely to have impacts on the biodiversity of the region. In order to better understand the impacts of climate change on biodiversity, I used ants, an indicator taxonomic group, to predict how ant communities and ant-mediated ecosystem processes change as the climate warms. In the first chapter of this dissertation, I review the major ecosystem processes and services mediated by ants using the Millennium Ecosystem …
Habitat Use Of The Key Largo Woodrat (Neotoma Floridana Smalli), Lauren J. Barth
Habitat Use Of The Key Largo Woodrat (Neotoma Floridana Smalli), Lauren J. Barth
FIU Electronic Theses and Dissertations
Key Largo woodrats are an endangered subspecies with an extremely limited habitat. This study sought to understand woodrat habitat preferences in order to guide management. Woodrats build stick nests from natural and artificial materials, so nest distribution and nest occupancy were used as indicators of preference. Distribution was determined by nest surveys, and remote cameras were used to assess occupancy. Forest structure, human disturbance, nest, and animal presence metrics were also collected. More nests were found along abandoned roads than along forest transects and more artificial nests were occupied than natural nests. These findings indicate that woodrats prefer areas with …
Influences Of Yard Management Intensity On Urban Soil Biogeochemistry, Viviana Penuela Useche
Influences Of Yard Management Intensity On Urban Soil Biogeochemistry, Viviana Penuela Useche
USF Tampa Graduate Theses and Dissertations
Soils are critical to ecosystem function as they provide essential nutrients for primary producers, habitat and organic energy for decomposers, and storage of organic matter. Irrigation with reclaimed water is an increasingly popular water conservation strategy; yet its high salinity and nutrient content potentially affect soil properties. In this study, set in a residential neighborhood of Tampa (U.S.). I tested whether there are distinct lawn system management strategies characterized by systematic differences in reclaimed water usage and irrigation and fertilization practices. I then investigated whether soil biogeochemistry responds to lawn system management strategy.
My results indicated that amendment strategy, which …
Jackson Lake Limnology, Wayne A. Wurtsbaugh
Jackson Lake Limnology, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
The limnology of Jackson Lake has been studied very little, despite the fact that it is the uppermost large lake on the headwaters of the Snake River, one of the larger rivers in the country (Hayden 1969). It is also an important fishery, largely for introduced lake trout. In 2014 we took our incoming graduate students to the Jackson Hole and one part of this introductory course focused on the limnology of the lake. Prior to the arrival of the students, a nutrient addition bioassay was initiated to demonstrate an experimental approach to understanding what nutrients might control production processes …
Review Of The Face Of The Earth, Ann E. Lundberg
Review Of The Face Of The Earth, Ann E. Lundberg
Faculty Publications
Review of SueEllen Campbell, et al. The Face of the Earth: Natural Landscapes, Science, and Culture. Published review is at Western American Literature.
The Ecology Of Infancy And Early Childhood In Rural Senegal; A Five Year Old Can Boot But Not Foot, An Exploration Of Where Biology Meets Culture, Heather Mills
Independent Study Project (ISP) Collection
This research project explores the life stages of infancy and early childhood in the village of Ndiane in the Thies region of Senegal. I will discuss how biology meets culture to influence children, parenting styles, and expectations of the life stage. How does ecology, the interaction of physical, biological and cultural landscapes, characterize childhood and the intertwined belief systems that influence parenting? The information was gathered using a combination of participant observation and free list interviews.
Remote Sensing Supported Vegetation Detection In The Hole-In-The-Donut Restoration Areas Report, September 2014, Daniel Gann
Remote Sensing Supported Vegetation Detection In The Hole-In-The-Donut Restoration Areas Report, September 2014, Daniel Gann
GIS Center
No abstract provided.
Facing The Wreck: Death, Optimism, And The Fragmented Form, Rachael Marie Schaffner
Facing The Wreck: Death, Optimism, And The Fragmented Form, Rachael Marie Schaffner
Graduate Theses and Dissertations
Walter Benjamin described history as a winged angel who faces backwards, staring perpetually into the past as the violent winds of destiny carry him into the future (Illuminations). Despite a western, post-enlightenment myth of eternal progress, the wreckage of human contributions to history is clearly evident in our 21st-century understanding of anthropogenic impact on global ecology. In the context of these ecological crises (and the resulting political and economic questions), postmodern novels reveal a powerful ability to imagine different ways of living and interacting with the world. This thesis traces the relationship between fragmentation, death, and liminal experiences …
Comparing Population Density Estimation Techniques For Columbia Black-Tailed Deer (Odocoileus Hemionus Columbianus): Fecal Standing Crop And Distance Sampling Methods, Jubilee D. Brenneman
Comparing Population Density Estimation Techniques For Columbia Black-Tailed Deer (Odocoileus Hemionus Columbianus): Fecal Standing Crop And Distance Sampling Methods, Jubilee D. Brenneman
Honors Projects
I estimated deer density and population size on Blakely Island, WA, using the fecal standing crop (FSC) method described by Martin et al. (2011). I compared the FSC method with a well established and broadly applicable estimation method, distance sampling. Additionally, architecture of a commonly browsed shrub, Ocean Spray (Holodiscus discolor), was measured as an indicator of browsing pressure. Fecal standing crop was estimated by counting pellet groups along 26, 100 x 2m line transects. Deer density was estimated using these data and the equation derived by Martin et al. (2011). Distance sampling consisted of recording perpendicular distance …
Body Shape Divergence In Invasive Round Goby, Cat Collins
Body Shape Divergence In Invasive Round Goby, Cat Collins
DePaul Discoveries
The round goby, Neogobius melanostomus, originally native to the Black and Caspian seas, was introduced into the Great Lakes via ballast water in the 1990’s. Since then, the species has spread to all of the Great Lakes, thriving in the Lake Michigan region and spreading to surrounding bays and rivers. Invasive species are considered to have a high evolutionary potential. Differences in environmental conditions between native and introduced ranges stimulate adaptive evolution. Multiple introductions of an exotic species can result in separate instances of founder effects, further increasing the chance of evolutionary change. A total of 267 round goby specimens …
Turtle Town: Creating A Self-Sustainable Ecosystem Using An Ecological Approach To Turtle Aquarium Design, Sheena K. O'Donnell
Turtle Town: Creating A Self-Sustainable Ecosystem Using An Ecological Approach To Turtle Aquarium Design, Sheena K. O'Donnell
Undergraduate University Honors Capstones
Typical pet turtle tank setups do not utilize the complete nutrient cycle seen in a functional natural ecosystem. This dysfunction results in waste and nutrient buildup, which is currently managed by water changes and regular tank cleaning. This type of maintenance can be costly and time-consuming -- not to mention unpleasant and hazardous to the aquarium owner's health. This study tested the effectiveness of using plants as part of a proposed ecological tank design to minimize waste buildup by utilizing nutrients. Wastewater from a dirty turtle tank was transferred to a tank setup containing three plants (Experimental Batch 1), while …
Relative Intestine Length And Feeding Ecology Of Freshwater Fishes, David O. Ribble, M H. Smith
Relative Intestine Length And Feeding Ecology Of Freshwater Fishes, David O. Ribble, M H. Smith
David O Ribble
There is a significant relationship between the intestine length (Y) and total body length (X) for 11 species of freshwater fish (Y = 0.08X1.42). Sufficient variation exists about this relationship to indicate important differences among the species' diets. The diets for each species, ranked on a Trophic Index scale determined from literature data, are negatively rank order correlated with the mean relative intestine lengths (rs = -0.67). There is no significant rank order correlation between the Trophic Indices determined from data on stomach contents and the mean relative intestine lengths for fish from a single creek.
Range Collapse, Genetic Differentiation, And Climate Change: An Ecological History Of The Diana Fritillary, Speyeria Diana And Projections For Its Future, Carrie Wells
All Dissertations
The geographic ranges of most plant and animal species are tied closely to climatic factors, including temperature, precipitation, and soil moisture. For this reason, recent changes in the global climate due to human activities are predicted to have profound effects on natural populations, communities and ecosystems over a relatively short period of time. Combined effects from global warming and other anthropogenic activities such as land-use changes, pollution, and habitat loss/fragmentation, are altering species' distributions faster than they can be documented. Recent climate change has also been shown to alter species' breeding behaviors and alter the synchrony and timing of species' …
Foraging Ecology Of Cougars In The Pryor Mountains Of Wyoming And Montana, Linsey Blake
Foraging Ecology Of Cougars In The Pryor Mountains Of Wyoming And Montana, Linsey Blake
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
We conducted this study to better understand the impact of cougar (Puma concolor) predation in the Pryor Mountains of Wyoming and Montana. Managers of the Bighorn Canyon National Recreation Area and the Pryor Mountain Wild Horse Range were concerned that cougars were having a negative impact upon a small, isolated Rocky Mountain bighorn sheep (Ovis canadensis canadensis) population and were hoping predation might be limiting a feral horse population (Equus caballus) that was in excess of the Appropriate Management Level set by the Bureau of Land Management. Wildlife tourism brings revenue to the park …
Synthesizing Research And Education: Ecology And Genetics Of Independent Fern Gametophytes And Teaching Science Inquiry And Content Through Simulations, Aaron M. Duffy
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The mission statements of Utah State University and the Department of Biology, as well as the requirements of funding agencies like the National Science Foundation encourage an integration of teaching and research. I have attempted to achieve that in my dissertation work by using tools I originally created to support and inform my biological research projects to teach science content and inquiry to middle school and undergraduate students.
Chapter 2 of this dissertation reports the results of surveys for Hymenophyllum wrightii, a fern with independent gametophyte populations in the Pacific Northwest, which improved our understanding of the range, distribution, …
Spatial And Habitat Responses Of Canada Lynx In Maine To A Decline In Snowshoe Hare Density, David G. Mallett
Spatial And Habitat Responses Of Canada Lynx In Maine To A Decline In Snowshoe Hare Density, David G. Mallett
Electronic Theses and Dissertations
Previous studies of Canada lynx (Lynx canadensis) within the northern boreal forest region have documented that lynx respond spatially to a decline in snowshoe hare (Lepus americanus) density, as exhibited by expansion of territories and changes in social structure. I compared home range area and spatial overlap in the southeastern portion of their geographic range during periods of relatively high and relatively low hare density. Home range areas of lynx did not change between periods of high and low hare density, except that home ranges of females during the denning season expanded during the low period. The presence of kittens …
Pelargonium (Geraniaceae) And The Long-Tongued Fly Pollination Guild: Coevolution And Polymorphism In A Specialized Pollination System, Emily M. Blank
Pelargonium (Geraniaceae) And The Long-Tongued Fly Pollination Guild: Coevolution And Polymorphism In A Specialized Pollination System, Emily M. Blank
Honors Scholar Theses
In South Africa, a group of long-tongued flies and the flowering plants they pollinate form a unique and diverse pollination guild system almost entirely endemic to the Greater Cape Floristic Region. This system makes up only a small portion of the biodiversity of the Region, but it is likely a key to understanding the evolutionary processes that have lead to the observed biodiversity. Aside from its unusual pollinators, this guild system is of particular interest due to the extremely labile morphology of both the fly species and the associated flowering plant species, which geographically vary significantly in proboscis lengths and …
Investigating The Impact Of Novel Iron Oxide Nanoparticles On Legionella Pneumophila Biofilms And Trophic Interactions, Brennen Jenkins
Investigating The Impact Of Novel Iron Oxide Nanoparticles On Legionella Pneumophila Biofilms And Trophic Interactions, Brennen Jenkins
All Theses
Microbial biofilms serve as the base of food webs and are important for nutrient cycling in aquatic ecosystems. Nanoparticles (NPs) that enter into these aquatic systems have the potential to settle and become trapped within biofilms. As NPs become further integrated into consumer products, understanding their fate and effects on aquatic ecosystems is of paramount importance. Previous studies from our lab show that gold NPs induce dispersal of Legionella pneumophila biofilms. NPs with platinum and iron oxide core chemistries also lead to similar dispersal events, however, silver core NPs do not seem to induce these events due to NP aggregation. …
Naturalized Offspring From An 85-Year-Old Chinese Chestnut (Castanea Mollissima) Planting: Stand Dynamics And Genetic Relationships, Amy Christel Miller
Naturalized Offspring From An 85-Year-Old Chinese Chestnut (Castanea Mollissima) Planting: Stand Dynamics And Genetic Relationships, Amy Christel Miller
Open Access Theses
Chestnuts, members of the genus Castanea , family Fagaceae, are valuable worldwide, and all species have noteworthy ecological, economic, and cultural importance in their native ranges. Historically, American chestnut (Castanea dentata (Marshall) Borkh.) was an abundant tree species in eastern North America until its decimation in the early 20 th century by chestnut blight, caused by the fungus Cryphonectria parasitica . To regain the benefits of this prized species in North America, efforts are ongoing to produce and introduce blight-resistant hybrids of C. dentata and the blight-resistant Chinese chestnut ( C. mollissima Blume). It is important that the C. …
Overwintering And Early Season Amplification Of Eastern Equine Encephalitis Virus In The Southeastern United States, Andrea Bingham
Overwintering And Early Season Amplification Of Eastern Equine Encephalitis Virus In The Southeastern United States, Andrea Bingham
USF Tampa Graduate Theses and Dissertations
Eastern equine encephalitis virus (EEEV) is a highly pathogenic arbovirus that causes severe disease, with a mortality rate of approximately 30-35% in humans and 80-90% in horses. Studies dating back to the 1930's have identified many of the epidemiological and ecological aspects of the virus. However, there are several aspects of EEEV's transmission cycle that remain unclear. In the northeastern states, transmission is seasonal, peaking in the late summer months, while in Florida there is year-round transmission of EEEV. Recent phylogenetic studies have also suggested that Florida may serve as a reservoir for EEEV; the virus may periodically be introduced …
Mechanisms Of Diatom Assembly In A Hydrologically-Managed Subtropical Wetland, Sylvia S. Lee
Mechanisms Of Diatom Assembly In A Hydrologically-Managed Subtropical Wetland, Sylvia S. Lee
FIU Electronic Theses and Dissertations
Diatoms are useful indicators of ecological conditions but the mechanisms driving assemblage distribution are not clearly defined. Understanding the mechanisms underlying assemblage distribution is necessary to make accurate predictions about the effects of environmental change, such as hydrologic management, restoration, and climate change. The examination of diatom distribution and key drivers across a large wetland over several years can provide a resolved spatio-temporal framework for determining the relative importance of environmental and spatial factors influencing assemblage patterns. I examined a 6-year record of diatom distribution across the Everglades, a large hydrologically-managed subtropical wetland. Successful restoration of this ecosystem depends on …
Review: The Rediscovery Of The Wild, Jillian M. Slater
Review: The Rediscovery Of The Wild, Jillian M. Slater
Marian Library Faculty Publications
Copyright (c) 2014, Jillian Slater. This review is available for non-commercial, educational use, provided that the user identify the author and the publication listed as the place of first publication, along with the volume and the year of the work's publication.
Management Of The Great Salt Lake Ecosystem: Water, Economic Values And Competing Interests, Wayne A. Wurtsbaugh
Management Of The Great Salt Lake Ecosystem: Water, Economic Values And Competing Interests, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
No abstract provided.
The Influence Of Topographic And Dynamic Cyclic Variables On The Distribution Of Small Cetaceans In A Shallow Coastal System, Marijke N. De Boer, Mark P. Simmonds, Peter J.H. Reijnders, Geert Aarts
The Influence Of Topographic And Dynamic Cyclic Variables On The Distribution Of Small Cetaceans In A Shallow Coastal System, Marijke N. De Boer, Mark P. Simmonds, Peter J.H. Reijnders, Geert Aarts
Ecology Collection
The influence of topographic and temporal variables on cetacean distribution at a fine-scale is still poorly understood. To study the spatial and temporal distribution of harbour porpoise Phocoena phocoena and the poorly known Risso’s dolphin Grampus griseus we carried out land-based observations from Bardsey Island (Wales, UK) in summer (2001–2007). Using Kernel analysis and Generalized Additive Models it was shown that porpoises and Risso’s appeared to be linked to topographic and dynamic cyclic variables with both species using different core areas (dolphins to the West and porpoises to the East off Bardsey). Depth, slope and aspect and a low variation …
Movement Patterns And Catch-And-Release Impacts Of Striped Bass In A Tidal Coastal Embayment In Massachusetts, Heather M. Tyrrell
Movement Patterns And Catch-And-Release Impacts Of Striped Bass In A Tidal Coastal Embayment In Massachusetts, Heather M. Tyrrell
Masters Theses 1911 - February 2014
An investigation into the spatial ecology and effects of catch-and-release angling on the physiology and behavior of striped bass was conducted. Fine-scale behavior was assessed by tagging fish with acoustic transmitters equipped with pressure and tri-axial accelerometer sensors and tracking them within a fixed array (n=34 receivers) in a Massachusetts estuary. Activity space changed significantly over the course of the season and increased with water temperature. Striped bass most frequently exhibited low levels of locomotory activity representing 67% of total activity measurements, with occasional high activity and burst swimming, often within the upper 3 m of the water column. Depth …
Monteverde: Ecology And Conservation Of A Tropical Cloud Forest - 2014 Updated Chapters, Nalini M. Nadkarni, Nathaniel T. Wheelwright
Monteverde: Ecology And Conservation Of A Tropical Cloud Forest - 2014 Updated Chapters, Nalini M. Nadkarni, Nathaniel T. Wheelwright
Bowdoin Scholars' Bookshelf
The Monteverde Cloud Forest Reserve has captured the worldwide attention of biologists, conservationists, and ecologists and has been the setting for extensive investigation over the past 40 years. Roughly 40,000 ecotourists visit the Cloud Forest each year, and it is often considered the archetypal high-altitude rain forest. “Monteverde: Ecology and Conservation of a Tropical Cloud Forest”, edited by Nalini Nadkarni and Nathaniel T. Wheelwright (Oxford University Press, 2000 and Bowdoin’s Scholar’s Bookshelf. Book 1 ), features synthetic chapters and specific accounts written by more than 100 biologist and local residents, presenting in a single volume everything known in 2000 about …
A Genealogy Of Ecological Rhetoric: Heraclitus, Bacon, Darwin And Huxley, Jared Grogan
A Genealogy Of Ecological Rhetoric: Heraclitus, Bacon, Darwin And Huxley, Jared Grogan
Wayne State University Dissertations
This dissertation is a genealogical study of historical intersections between rhetoric and ecology. Studying the works of Heraclitus, Francis Bacon, T.H. Huxley and Darwin as "bridge figures" in the history of rhetoric, science and ecological thought, I examine how their rhetorical theories and strategies (as discursive practices, performances and techniques) form a genealogy that bridges rhetorical and ecological theories and practices. My analysis studies their critical assessments and uses of rhetoric as it intersects with each figure's new investigations into natural philosophy, nature, and evolutionary biology, while drawing out relevant lessons for contemporary ecological and rhetorical thinkers. The main threads …