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Articles 1 - 29 of 29
Full-Text Articles in Life Sciences
Plant Genotype, Not Nutrients, Shape Aphid Population Dynamics, Heather E. Tran, Lara Souza, Nathan J. Sanders, Aimee T. Classen
Plant Genotype, Not Nutrients, Shape Aphid Population Dynamics, Heather E. Tran, Lara Souza, Nathan J. Sanders, Aimee T. Classen
Chancellor’s Honors Program Projects
No abstract provided.
Population Status, Habitat Dependence, And Reproductive Ecology Of Bahama Orioles: A Critically Endangered Synanthropic Species, Melissa R. Price, Valerie A. Lee, William K. Hayes
Population Status, Habitat Dependence, And Reproductive Ecology Of Bahama Orioles: A Critically Endangered Synanthropic Species, Melissa R. Price, Valerie A. Lee, William K. Hayes
Faculty Works
Recent elevation of critically endangered Bahama Orioles (Icterus northropi) to species status prompted us to evaluate their population status, habitat use, and breeding ecology. From surveys, we estimated that at least 141 to 254 individuals remain globally, with 90 to 162, 24 to 44, and 27 to 48 individuals remaining on North Andros Island, Mangrove Cay, and South Andros Island, The Bahamas, respectively. Orioles were observed nesting exclusively in anthropogenic habitat (residential and agricultural land), but home ranges also included nearby pine forest and coppice (dry broadleaf forest). Most nests (40 of 46, or 87%) were in nonnative coconut palm …
Gravesoil Microbial Community Structure During Carcass Decomposition, Amy E. Maile
Gravesoil Microbial Community Structure During Carcass Decomposition, Amy E. Maile
Department of Entomology: Dissertations, Theses, and Student Research
Dead bodies placed on soil represent unique challenges for investigators. Although processes in soils can be used to estimate postmortem interval, we know very little about how carcasses and insects affect gravesoil microbial communities.
To address this, the current project was composed of two experiments. Experiment one was conducted to investigate the effect of surface type on carcass decomposition and evaluate soil ecology methods. Experiment two was conducted to investigate the presence of an insect population (Lucilia sericata Meigen) on gravesoil microbial communities. Both experiments were conducted in a laboratory setting using freshly killed mouse carcasses. Mouse carcasses were …
The Evolution Of Lateralized Foot Use In Parrots: A Phylogenetic Approach, Culum Brown, Maria Magat
The Evolution Of Lateralized Foot Use In Parrots: A Phylogenetic Approach, Culum Brown, Maria Magat
Sentience Collection
Cerebral lateralization refers to the division of cognitive function in either brain hemisphere and may be overtly expressed as behavioral asymmetries, such as handedness. The evolutionary history of laterality is of considerable interest due to its close link with the development of human language. Although considerable research effort has aimed at the proximate explanations of cerebral lateralization, considerably less attention has been paid to ultimate explanations. The extent to which laterality is constrained by phylogeny or shaped by ecological forces through natural selection has received little attention. Here, the foot preference of 23 species of Australian parrots was examined to …
Climate And Vegetation Change In The Newberry Mountains, Southern Clark County, Nevada, Ross Joseph Guida
Climate And Vegetation Change In The Newberry Mountains, Southern Clark County, Nevada, Ross Joseph Guida
UNLV Theses, Dissertations, Professional Papers, and Capstones
Ecological studies have shown worldwide that vegetation is being affected by climate change. Species are shifting to new elevations and physiographic positions to adapt to changes in their environment. More specifically, paleoecology studies in the Mojave Desert have shown shifting vegetation patterns in response to past warming and precipitation changes. Recent studies have shown mortality among desert plants related to extended drought and warming. However, few studies have shown how the geographic distribution of Mojave Desert species has changed during this most recent period of warming. This study addresses this gap in the literature by focusing on several plant species …
Zoos As Experiment Environments: Biology Of Larval And Adult Mosquitoes (Diptera: Culicidae), Holly Tuten
Zoos As Experiment Environments: Biology Of Larval And Adult Mosquitoes (Diptera: Culicidae), Holly Tuten
All Dissertations
Zoos are a unique environment where humans and animals are in close daily contact, potential mosquito habitats exist, exotic plants and animals are introduced regularly, and wild animals roam. Studies of mosquito behaviors in zoos will lead to a better understanding, both within and outside zoos, of disease transmission routes and mosquito biology. To investigate whether the unique assemblage of habitats in zoos affects mosquito behavior, I sampled larvae and adults in the Greenville Zoo and the Riverbanks Zoo, South Carolina, USA, from March 2008 to January 2011. The objectives of my study were to investigate mosquito oviposition behavior, blood-host …
The Distribution And Life Cycle Of Alliaria Petiolata In Lincoln, Nebraska, Caleb Pharris
The Distribution And Life Cycle Of Alliaria Petiolata In Lincoln, Nebraska, Caleb Pharris
Department of Environmental Studies: Undergraduate Student Theses
Alliaria petiolata (Garlic Mustard) is a biennial alien invasive plant species of the Brassicacea family. It is responsible for displacing native plant species throughout North America and its management has proven to be extremely difficult. Recently several populations of Alliaria petiolata have been discovered in southwestern Lincoln, Nebraska. The spread of Alliaria petiolata is a concern for natural resource managers and the general public. Due to the difficulty of its control, Alliaria petiolata is capable of creating monocultures which diminish the aesthetic value of an ecosystem. While most commonly found in the understory of hardwood forests, it is capable of …
Old Father Hudson: The Three Stages Of Environmental Activism In The Hudson River Valley, Gregory P. Cannillo
Old Father Hudson: The Three Stages Of Environmental Activism In The Hudson River Valley, Gregory P. Cannillo
Honors Theses
Consequences of development have threatened the health of the Hudson River for decades. These have included the prospect of destroying scenic value of the Hudson River Valley with the a hydroelectric power plant on Storm King Mountain, as well as the pollution of the river itself by a variety of industrial sources. Since the 1960s, a long lineage of environmental activism in the Hudson River Valley has emerged to address those issues. The example of the Hudson River supplies an excellent case study of how environmental issues began to be addressed in the later half of the 20th century. I …
Human-Wildlife Conflict On Small, Subsistence Farms In Kenya, Christopher B. Colonna
Human-Wildlife Conflict On Small, Subsistence Farms In Kenya, Christopher B. Colonna
Mahurin Honors College Capstone Experience/Thesis Projects
As human populations expand, wildlife suddenly competes with humans for resources and confrontation arises as a result. Rural Africa is typical of this problem. We surveyed local owners of small farms within the five villages surrounding Mount Kasigau in Southeast Kenya to quantify losses due to wildlife depredation on both subsistence and cash crops as well as to discover the patterns and variables influencing farmer-wildlife confrontations in the region. We found no statistically significant correlations among the value of damage per acre, the distance from the bush, or the distance to the nearest water source. We did find statistical significance …
Changes In Leaf Morphology, Photosynthesis And Nitrogen Content In Two Coastal Shrubs, Elizabeth Kost
Changes In Leaf Morphology, Photosynthesis And Nitrogen Content In Two Coastal Shrubs, Elizabeth Kost
Theses and Dissertations
It is important to understand mechanisms that facilitate expansion of two common shrubs, Morella cerifera and Baccharis halimifolia in coastal environments. The purpose of my study was to investigate the physiological and structural changes that occur as leaves age. Photosynthesis, incident light, chlorophyll, and leaf C:N ratios were quantified for young, intermediate, and old leaves (distal, central and proximal leaves, respectively). Leaf structural differences were also compared. Leaves did not change morphologically with age. Light decreased with leaf age and during winter months. Photosynthesis showed no seasonal or age related patterns. Chlorophyll increased initially and then declined with age due …
Sponges Of The Caribbean: Linking Sponge Morphology And Associated Bacterial Communities, Ericka Ann Poppell
Sponges Of The Caribbean: Linking Sponge Morphology And Associated Bacterial Communities, Ericka Ann Poppell
Master's Theses
The ecological and evolutionary relationship between sponges and their symbiotic microflora remains poorly understood, which limits our ability to understand broad scale patterns in benthic-pelagic coupling on coral reefs. Previous research classified sponges into two different categories of sponge microbial associations: High Microbial Abundance (HMA) and Low Microbial Abundance (LMA) sponges. Choanocyte chamber morphology and density was characterized in representatives of HMA and LMA sponges using scanning electron microscopy from freeze-fractured tissue. Denaturing Gradient Gel Elextrophoresis was used to examine taxonomic differences among the bacterial communities present in a variety of tropical sponges. The results supported the hypothesis that choanocyte …
Epigeic Spider (Araneae) Diversity And Habitat Distributions In Kings Mountain National Military Park, South Carolina, Sarah Stellwagen
Epigeic Spider (Araneae) Diversity And Habitat Distributions In Kings Mountain National Military Park, South Carolina, Sarah Stellwagen
All Theses
This study examined the epigeic spider fauna in Kings Mountain National Military Park. The aim of this study is to make this information available to park management for use in the preservation of natural resources. Pitfall trapping was conducted monthly for one year in three distinct habitats: riparian, forest, and ridge-top. The study was conducted from August 2009 to July 2010. One hundred twenty samples were collected in each site. Overall, 289 adult spiders comprising 66 species were collected in the riparian habitat, 345 adult comprising 57 species were found in the forest habitat, and 240 adults comprising 47 species …
Wood Anatomy Of Family Salvadoraceae From The Indian Subcontinent With Special Reference To The Ultrastructure Of The Vessel Wall, Vishakha Saxena, Sangeeta Gupta
Wood Anatomy Of Family Salvadoraceae From The Indian Subcontinent With Special Reference To The Ultrastructure Of The Vessel Wall, Vishakha Saxena, Sangeeta Gupta
Aliso: A Journal of Systematic and Floristic Botany
The present study describes the wood microstructure of Azima tetracantha, Salvadora oleoides, and S. persica, the members of family Salvadoraceae represented in the Indian Subcontinent. An identification key based on wood anatomical features has been developed for the separation of the species. SEM studies revealed the presence of vesturing in intervessel pits of Salvadora.
The Effects Of Low Intensity Burn On Population Size, Predation Rates, And Prey Abundance In The Striped Plateau Lizard (Sceloporus Virgatus), Sabrina E. Duncan
The Effects Of Low Intensity Burn On Population Size, Predation Rates, And Prey Abundance In The Striped Plateau Lizard (Sceloporus Virgatus), Sabrina E. Duncan
Summer Research
No abstract provided.
The Missing Link: The Ecology Of The Serpentine And The Implications For East And North Ponds, Colby Environmental Assessment Team, Colby College, Problems In Environmental Science Course (Biology 493), Colby College
The Missing Link: The Ecology Of The Serpentine And The Implications For East And North Ponds, Colby Environmental Assessment Team, Colby College, Problems In Environmental Science Course (Biology 493), Colby College
Colby College Watershed Study: East and North Ponds (2011, 1999, 1996, 1991)
During the fall of 2011, the Colby Environmental Assessment Team (CEAT) studied the Serpentine connecting East Pond and North Pond. East and North Ponds are members of the larger seven-lake system known as the Belgrade Lakes, located in central Maine. There are over 5,500 lakes in Maine that contribute $6.7 billion to the economy annually through activities including boating, fishing, swimming etc. Additionally, Maine’s lakes are sources of municipal and agricultural water, act as flood buffers, and host a wide range of plant, animal, and fish life. Lakes in Maine are a crucial part society and should be studied and …
Species Composition And Abundance Of Mammalian Communities, K. M. Thibault, S. R. Supp, M. Griffin, Ethan P. White, S.K. Morgan Ernest
Species Composition And Abundance Of Mammalian Communities, K. M. Thibault, S. R. Supp, M. Griffin, Ethan P. White, S.K. Morgan Ernest
Ethan P White
Ecologists have long sought to understand the mechanisms underlying the assembly and structure of communities. Such understanding is relevant to both basic science and conservation-related issues. The macroecological approach to this problem involves asking scientific questions using a large number of communities in order to elucidate generalities in pattern and process. Such analyses are typically conducted using a substantial amount of data from a particular taxonomic group across a diversity of systems. Large community databases are available for a number of taxa, but no publicly available database exists for mammals. Given the logistical challenges of collecting such data de novo, …
Ecology Of The Rock Rattlesnake, Crotalus Lepidus, In The Northern Chihuahuan Desert, Vicente Mata Silva
Ecology Of The Rock Rattlesnake, Crotalus Lepidus, In The Northern Chihuahuan Desert, Vicente Mata Silva
Open Access Theses & Dissertations
The Rock Rattlesnake, Crotalus lepidus is a small species that is found from southern Arizona, southern New Mexico, and southern Texas, in the U.S., into northern Mexico. To date, little is known about the ecology of this species. Ecological information is becoming desperately needed for supporting the conservation and protection of species living in fragile environments such as the Chihuahuan Desert amid current local and global threats (e.g., habitat destruction and modification, urban development, and climate change). Although rattlesnakes spend a significant amount of time underground while overwintering, little is known about the physiology and behavior of these organisms during …
Species Compositionand Abundance Of Mammalian Communities, K. M. Thibault, S. R. Supp, M. Griffin, Ethan P. White, S.K. Morgan Ernest
Species Compositionand Abundance Of Mammalian Communities, K. M. Thibault, S. R. Supp, M. Griffin, Ethan P. White, S.K. Morgan Ernest
Biology Faculty Publications
Ecologists have long sought to understand the mechanisms underlying the assembly and structure of communities. Such understanding is relevant to both basic science and conservation-related issues. The macroecological approach to this problem involves asking scientific questions using a large number of communities in order to elucidate generalities in pattern and process. Such analyses are typically conducted using a substantial amount of data from a particular taxonomic group across a diversity of systems. Large community databases are available for a number of taxa, but no publicly available database exists for mammals. Given the logistical challenges of collecting such data de novo, …
Greening Rural Festivals: Ecology, Sustainability And Human-Nature Relations, Christopher R. Gibson, C Wong
Greening Rural Festivals: Ecology, Sustainability And Human-Nature Relations, Christopher R. Gibson, C Wong
Faculty of Science - Papers (Archive)
No abstract provided.
Quantitatively Measuring In Situ Flows Using A Self-Contained Underwater Velocimetry Apparatus (Scuva), Kakani Katija, Sean Colin, John H. Costello, John O. Dabiri
Quantitatively Measuring In Situ Flows Using A Self-Contained Underwater Velocimetry Apparatus (Scuva), Kakani Katija, Sean Colin, John H. Costello, John O. Dabiri
Arts & Sciences Faculty Publications
The ability to directly measure velocity fields in a fluid environment is necessary to provide empirical data for studies in fields as diverse as oceanography, ecology, biology, and fluid mechanics. Field measurements introduce practical challenges such as environmental conditions, animal availability, and the need for field-compatible measurement techniques. To avoid these challenges, scientists typically use controlled laboratory environments to study animal-fluid interactions. However, it is reasonable to question whether one can extrapolate natural behavior (i.e., that which occurs in the field) from laboratory measurements. Therefore, in situ quantitative flow measurements are needed to accurately describe animal swimming in their natural …
Interception In Open-Grown Douglas-Fir (Pseudotsuga Menziesii) Urban Canopy, Mitchell Bixby
Interception In Open-Grown Douglas-Fir (Pseudotsuga Menziesii) Urban Canopy, Mitchell Bixby
Dissertations and Theses
I hypothesized that Douglas-fir trees (Pseudotsuga menziesii) standing apart from other trees ('open-grown') will intercept more rainfall than Douglas-fir trees standing near other trees ('closed-canopy'). Open-grown trees differ structurally and are more common in urban settings, yet have been infrequently studied. Existing literature, based primarily on closed-canopy trees, suggests Douglas-fir trees in Pacific Northwest forests intercept approximately 25% of rainfall annually. Because open-grown trees have more vertical leaf area than individual trees in closed-canopy forests, I expected to find higher interception by open-grown trees.
I collected throughfall under four open-grown Douglas-firs using six static collectors ('buckets') per tree, …
Development And Testing Of An Unmanned Aircraft System For Environmental Science, Jerald James Brady
Development And Testing Of An Unmanned Aircraft System For Environmental Science, Jerald James Brady
Open Access Theses & Dissertations
For some environmental science applications, Unmanned Aircraft Systems (UASs) are increasingly recognized for their capacity to collect remotely sensed data in a safer, more efficient and effective manner than is permitted with manned aircraft and satellite remote sensing platforms. To date, however, technological, human, and other challenges have constrained adoption of UASs in the environmental sciences. This study developed and tested a new UAS for an archetypical environmental science research group (stakeholder) composed of non-UAS experts. Specifically, this thesis: 1) Assessed the research and operational needs of the stakeholder to determine the optimum UAS platform; 2) Developed an Unmanned Aerial …
Mapping And Analysing The Diversity Of The Genus Acantholimon Taxa In Turkey By Geographic Information Systems (Gis), Hakan Mete Doğan, Musa Doğan, Gali̇p Akaydin, Ferhat Celep
Mapping And Analysing The Diversity Of The Genus Acantholimon Taxa In Turkey By Geographic Information Systems (Gis), Hakan Mete Doğan, Musa Doğan, Gali̇p Akaydin, Ferhat Celep
Turkish Journal of Botany
We describe the spatial distribution of the genus Acantholimon Boiss. (Plumbaginaceae) taxa in Turkey, and assess the role that environmental variables may be playing on this distribution. We collected a large number of specimens from 418 geo-referenced sampling sites between 2000 and 2004, and established a point database using geographic information systems (GIS) software. As a result, we identified and mapped 67 taxa; 43 of the determined taxa appear to be endemic. We re-evaluated the current conservation status of the taxa at a national level using recent IUCN Red List categories. In addition, we extracted the corresponding environmental variables of …
Proceedings Of The 2011 International Conference On Karst Hydrogeology And Ecosystems, Jason Samuel Polk, Leslie A. North
Proceedings Of The 2011 International Conference On Karst Hydrogeology And Ecosystems, Jason Samuel Polk, Leslie A. North
Environmental Sustainability Books
Jointly sponsored by the Hoffman Environmental Research Institute, the National Cave & Karst Research Institute, and the International Association of Hydrogeologists, the 2011 International Conference on Karst Hydrogeology and Ecosystems was held at Western Kentucky University in Bowling Green, Kentucy on 8-10 June 2011. Topics include karst geomorphology, engineering and modeling, isotope geochemistry, and cultural and educational aspects of karst environments.
Nutritional Properties Of The Invasive Lionfish: A Delicious And Nutritious Approach For Controlling The Invasion, James A. Morris, Jr., Amber Thomas, Andrew L. Rhyne, Nancy Breen, Lad Akins, Barry Nash
Nutritional Properties Of The Invasive Lionfish: A Delicious And Nutritious Approach For Controlling The Invasion, James A. Morris, Jr., Amber Thomas, Andrew L. Rhyne, Nancy Breen, Lad Akins, Barry Nash
Arts & Sciences Faculty Publications
Lionfish, Pterois volitans and P. miles, are native to the Indo-Pacific and have recently invaded the Western Atlantic Ocean. Strategies for control of this invasion have included limited removal programs and promotion of lionfish consumption at both local and commercial scales. We demonstrate that lionfish meat contains higher levels of healthy n-3 fatty acids than some frequently consumed native marine fish species. Mean lionfish fillet yield was 30.5% of the total body wet weight, a value that is similar to that of some grouper and porgy species. A sensory evaluation indicated that lionfish meet the acceptability threshold of most consumers.
On The Use Of Log-Transformation Vs. Nonlinear Regression For Analyzing Biological Power-Laws, Xiao Xiao, Ethan P. White, M. B. Hooten, Susan L. Durham
On The Use Of Log-Transformation Vs. Nonlinear Regression For Analyzing Biological Power-Laws, Xiao Xiao, Ethan P. White, M. B. Hooten, Susan L. Durham
Biology Faculty Publications
Power-law relationships are among the most well-studied functional relationships in biology. Recently the common practice of fitting power-laws using linear regression on log-transformed data (LR) has been criticized, calling into question the conclusions of hundreds of studies. It has been suggested that nonlinear regression (NLR) is preferable, but no rigorous comparison of these two methods has been conducted. Using Monte Carlo simulations we demonstrate that the error distribution determines which method performs better, with LR better characterizing data with multiplicative lognormal error and NLR better characterizing data with additive, homoscedastic, normal error. Analysis of 471 biological power-laws shows that both …
Advertisement Call And Distribution Of The Treefrogs Hyla Chrysoscelis And Hyla Versicolor In Virginia, Joseph C. Mitchell, Christopher A. Pague
Advertisement Call And Distribution Of The Treefrogs Hyla Chrysoscelis And Hyla Versicolor In Virginia, Joseph C. Mitchell, Christopher A. Pague
Virginia Journal of Science
The gray treefrog complex consists of two sibling species that are indistinguishable morphologically, the diploid Hyla chrysoscelis and the tetraploid Hyla versicolor. Identification is possible in the field only by audio recognition of male advertisement call trill rates (pulses/second). During 1979-1983 we evaluated taped calls of these two species taken from 89 populations from throughout Virginia to map their respective ranges and to evaluate differences in call parameters. Hyla chrysoscelis occurs in the Coastal Plain, eastern and southern Piedmont, and in southwestern Virginia. Hyla versicoloroccurs in the Piedmont, Blue Ridge, and Ridge and Valley regions south to Wythe …
Scaphopod Species (Mollusca) Of The Turkish Levantine And Aegean Seas, Bi̇lal Öztürk
Scaphopod Species (Mollusca) Of The Turkish Levantine And Aegean Seas, Bi̇lal Öztürk
Turkish Journal of Zoology
An examination of benthic material collected from different depths (0-875 m) and habitats along the Turkish Levantine and Aegean seas between 1996 and 2008 has resulted in the identification of 819 scaphopod specimens, belonging to 10 species: Antalis dentalis (Linneaus, 1758), Antalis inaequicostata (Dautzenberg, 1891), Antalis panorma (Chenu, 1843), Antalis rossati (Caprotti, 1966), Antalis vulgaris (da Costa, 1778), Fustiaria rubescens (Deshayes, 1825), Entalina tetragona (Brocchi, 1814), Pulsellum lofotense (M. Sars, 1865), Cadulus jeffreysi (Monterosato, 1875), and Dischides politus (S. Wood, 1842). Of these, P. lofotense and C. jeffreysi are new records for the Aegean molluscan fauna and A. panorma and …
Soil Moisture, Fire, And Tree Community Structure, William Patrick White
Soil Moisture, Fire, And Tree Community Structure, William Patrick White
Browse all Theses and Dissertations
My study was conducted to understand tree community structure and how soil moisture and fire frequency influence them. Eighteen plots were placed in the Edge of Appalachia Nature Preserve of unglaciated southern Ohio: nine within a prescribed burn site and nine control sites outside the burn. Sites were stratified in triplicate across GIS-derived integrated soil moisture index (IMI) classes. Burning was done in 1996. Overstory species dbh and sapling species were sampled 1997, 2001, and 2008. Overstory stems were located in 2009 using range finders. Stem locations were loaded into GIS using novel techniques to quantify individual stem IMI values. …