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Articles 1 - 30 of 1296
Full-Text Articles in Biodiversity
Leaf Optical And Indirect Lai Measurements In Wheat And Alfalfa At Maciv: Agmet Progress Report 89-4, E. A. Walter-Shea, B. L. Blad
Leaf Optical And Indirect Lai Measurements In Wheat And Alfalfa At Maciv: Agmet Progress Report 89-4, E. A. Walter-Shea, B. L. Blad
School of Natural Resources: Documents and Reviews
No abstract provided.
Drone Imagery Of Submarine Groundwater Discharge Effects On Coastal Primary Productivity On Coral Reefs In Maunalua Bay, Hawai'i, Lulu Wang, Florybeth Flores La Valle, Grace Kim
Drone Imagery Of Submarine Groundwater Discharge Effects On Coastal Primary Productivity On Coral Reefs In Maunalua Bay, Hawai'i, Lulu Wang, Florybeth Flores La Valle, Grace Kim
Seaver College Research And Scholarly Achievement Symposium
Submarine groundwater discharge (SGD) plays a crucial role in coastal ecosystems, especially coral reefs, by introducing terrestrial nutrients and freshwater, significantly affecting the primary productivity of coastal ecosystems and potentially altering ecological balances. La Valle et al. (2023) emphasized the importance of SGD in nutrient distribution and algal productivity, highlighting the need for comprehensive understanding and management strategies in the face of increasing nutrient runoff due to land use changes due to increased population. To better understand the impact, our experiments utilize remote sensing and data science by using a DJI Mavic 3 Enterprise drone with a thermal imaging camera …
Effectiveness Of Frog Skin Secretions Against Uv-B Radiation, Connor Mcgaha, Kinkade Mcmurray, Lee B. Kats
Effectiveness Of Frog Skin Secretions Against Uv-B Radiation, Connor Mcgaha, Kinkade Mcmurray, Lee B. Kats
Seaver College Research And Scholarly Achievement Symposium
As an increasing number of their species face possible extinction, amphibian populations have been steadily declining over the past decades (IUCN). While various factors have been suggested or proven to be partially responsible for this reduction, increased ultraviolet B radiation (UVBR) appears to be one of the more prominent explanations, especially when considering the continual thinning of the Earth’s ozone layer due to anthropogenic climate change. However, it has also been discovered that skin secretions, which are reported to function as a component of amphibians’ innate immune systems, may have an effect on UVBR (Cramp and Franklin). With this in …
Animal Conservation In St. Louis, Kate O'Sullivan
Animal Conservation In St. Louis, Kate O'Sullivan
Undergraduate Research Symposium
St. Louis has a multitude of organizations involved in the natural sciences. But how many of them actually contribute towards animal conservation? The St. Louis Zoo is an organization that focuses a lot of its effort on presentation, so how does that impact the funds that go towards actually saving the animals? I plan to dive into the different animal-based organizations in St. Louis and its surrounding areas, as well as discuss the positives and negatives of each organization. Furthermore, I will provide examples from several sources that I have been reviewing all year to support my claims. I plan …
Lycosidae Abundance And Diversity Across Lawn And Leaf Litter Substrate, Sage O. Lockett, Dan Albrecht-Mallinger
Lycosidae Abundance And Diversity Across Lawn And Leaf Litter Substrate, Sage O. Lockett, Dan Albrecht-Mallinger
Undergraduate Research Posters
Significant knowledge gaps exist in how land-cover impacts ground-hunting spider populations. To fill these gaps, this study investigates a common family of ground-hunting spiders, Lycosidae, to determine differences in their abundance and diversity in deciduous leaf litter and managed turfgrass (lawn). The study was conducted within a forested ecosystem at Virginia Commonwealth University's Rice Rivers Center in Charles City County, Virginia. I placed 10 belt transects (1m x 20m) on lawn substrate and 10 identical transects in deciduous forest leaf litter substrate. I performed repeated visual census via eyeshine and manual capture of up to three individuals per transect …
Quantifying The Ecological Effects Of Salix Fragilis On Riparian Habitat In Kittitas County, Washington, Landon Shaffer
Quantifying The Ecological Effects Of Salix Fragilis On Riparian Habitat In Kittitas County, Washington, Landon Shaffer
All Master's Theses
Invasive species threaten plant community structure and function globally. Riparian areas, the zone near streams where water influences vegetation, are especially sensitive to invasive species colonization, suffering large-scale shifts in community composition. Salix fragilis (crack willow) is a nonnative riparian species abundant in the lower elevation tributaries of central Washington. Some speculate whether this willow should be listed as invasive in Washington, despite a lack of regional supporting evidence. I studied riparian communities dominated by either S. fragilis or native species in the Kittitas Valley and measured biodiversity, quantified differences in solar attenuation, and compared leaf decomposition rates to learn …
A Conservation Model: Costa Rican Conservation Strategies Effectively Preserve Their Threatened Primates, Ryan Belmont
A Conservation Model: Costa Rican Conservation Strategies Effectively Preserve Their Threatened Primates, Ryan Belmont
Regis University Student Publications (comprehensive collection)
The wildlife of Costa Rica has experienced various anthropogenic threats over the last century including climate change and agricultural expansion. The mantled howler monkey (Alloutta palliata), Central American spider monkey (Ateles geoffroyi), white-faced capuchin (Cebus imitator), and the Central American squirrel monkey (Saimiri oerstedii) are Costa Rica’s native primates that face several anthropogenic threats such as deforestation for agriculture and climate change. In response to increased threats to its four native species of non-human primates, Costa Rica has implemented effective governmental conservation tactics such as the Payments for Environmental Services program, ecotourism …
Addressing Water Hyacinth (Pontederia Crassipes) Impacts On Aquatic Biota In Lake Okeechobee, Joseph Salerno
Addressing Water Hyacinth (Pontederia Crassipes) Impacts On Aquatic Biota In Lake Okeechobee, Joseph Salerno
All HCAS Student Capstones, Theses, and Dissertations
The incursion of water hyacinth, Pontederia crassipes in Lake Okeechobee has resulted in management systems to be implemented to reduce the coverage of the invasive macrophyte. Its residence in the Lake Okeechobee ecosystem and the effects it has on organisms in the lake, whether it be positive or harmful is unknown. This study attempted to assess the potential effects that water hyacinth has on aquatic biota in Lake Okeechobee. Biotic data were collected on open water, water hyacinth covered, and native vegetation covered habitats via hook-and-line fishing, electrofishing, baited minnow traps, and the sampling of plant roots over a thirteen-month …
Quantifying The Role Of Water Quality On Nitrogen Cycling In A Trophic Estuary, Kayla Gonzalez-Boy
Quantifying The Role Of Water Quality On Nitrogen Cycling In A Trophic Estuary, Kayla Gonzalez-Boy
Symposium of Student Scholars
Jobos Bay Estuary is an intertidal, tropical estuary located in southern Puerto Rico. The estuary covers about 12 km2 and has a variety of habitats, such as seagrass beds, mangroves, mud flats, and coral reefs, which play important roles in sediment trapping and water quality maintenance. Seagrasses also serve as nursery and feeding grounds and provide shelter for macrofauna. Currently, the role of seagrasses and water quality on nitrogen (N) cycling in trophic estuaries is not well constrained. Understanding variations in sediment-based effects on N cycling rates and transformations, and how they are associated with water quality, is an …
Book Review: Habitantes De La Obscuridad (Fauna Ibero-Balear De Las Cuevas) – Inhabitants Of The Darkness (Ibero-Baleric Fauna Of Caves), Oana Teodora Moldovan
Book Review: Habitantes De La Obscuridad (Fauna Ibero-Balear De Las Cuevas) – Inhabitants Of The Darkness (Ibero-Baleric Fauna Of Caves), Oana Teodora Moldovan
International Journal of Speleology
NA
Effects Of Large Wood Additions On Basal Resources, Macroinvertebrates, And Ecosystem Processes In The Narraguagus River, Maine, Val Watson
Electronic Theses and Dissertations
Ecological restoration is an increasingly common practice across ecosystems, and current practices aim to restore the biological and physical processes underlying ecosystem function, often for the sake of endangered higher-level consumers. Studies of restoration outcomes often report few or inconsistent ecological changes, and monitoring of restoration projects rarely measures ecological processes. Monitoring also usually measures outcomes at a single scale, despite the prevalence of scale- dependent phenomena across ecosystems. My thesis uses measurements of ecological processes to assess restoration response and evaluates responses across multiple scales. I focus here on a long-term large wood addition project on the Narraguagus River …
Monitoring The Effects Of Poultry Waste On Fishes And Macroinvertebrates In The Sabine River, Karley R. Parker
Monitoring The Effects Of Poultry Waste On Fishes And Macroinvertebrates In The Sabine River, Karley R. Parker
Biology Theses
Freshwater is a vital resource that provides life and sustainability for almost all organisms on Earth. It is important to maintain its health and protect it from emerging pollutants that pose a threat to the organisms that use it. Pollution continues to threaten the well-being of the environment’s freshwater sources all around the world that could lead to damaging effects in the future. The Sabine River is a major freshwater resource in the east Texas and western Louisiana areas that provides a habitat for thousands of organisms as well as other domestic uses for humans. In 2019, a waste discharge …
An Ecological Survey Of East Texas Salamanders Across The Camp Tyler Outdoor Field School In Smith County, Texas, Justin C. Hunt
An Ecological Survey Of East Texas Salamanders Across The Camp Tyler Outdoor Field School In Smith County, Texas, Justin C. Hunt
Biology Theses
Amphibians are a unique class of organisms with a very long and storied evolutionary history of survival. Many modern amphibian clades occupy several vital ecological roles within their native freshwater environments. One of these roles, typically includes functioning as an ecological indicator species, whereby the presence of stable and diverse populations of many amphibian species, including salamanders, within a freshwater ecosystem have long been considered ecological indicators of good habitat quality and stable ecosystem health. Similarly, salamanders also function as important members of their local food webs and act as valuable mediators of complex trophic hierarchies to facilitate nutrient cycling …
Commercial Fishing Identification Guide 2023, Department Of Primary Industries And Regional Development, Western Australia
Commercial Fishing Identification Guide 2023, Department Of Primary Industries And Regional Development, Western Australia
Fisheries occasional publications
Throughout this guide you will see all or some of the marine bioregion symbols with each fish illustration, indicating where the species is most likely to occur.
This guide has been developed to help you identify the more common species in Western Australia you may encounter. The purpose of this guide is to enhance consistent and accurate species identification.
If you are unsure about a particular species (or if it is not in this guide), please discuss it with a representative of the Department of Primary Industries and Regional Development, Western Australia.
The Impact Of Road Crossings On Karst Headwater Streams In Northwest Arkansas, Anthony M. Zenga
The Impact Of Road Crossings On Karst Headwater Streams In Northwest Arkansas, Anthony M. Zenga
ATU Theses and Dissertations 2021 - Present
The karst region of NW Arkansas is home to many headwater endemic Species of Greatest Conservation Need (SGCN). This includes many species of darters, such as Etheostoma cragini, E. microperca, and E. mihileze, as well as crayfish such as Faxonious meeki brevis and F. nana. NW Arkansas is rapidly urbanizing, increasing the need to construct structures like culverts, bridges, and fords. These man-made road crossings can cause stream habitat degradation and fragmentation, as well as impair overall stream connectivity. To evaluate the impact that road crossings have on aquatic SGCN species and their habitat, 30 headwater streams were sampled throughout …
Development Of A 16s Reference Library For Edna Metabarcoding The Freshwater Fishes Of Western Ecuador., Hannah M. Willis, Olivia G. Schweikart, Windsor E. Aguirre
Development Of A 16s Reference Library For Edna Metabarcoding The Freshwater Fishes Of Western Ecuador., Hannah M. Willis, Olivia G. Schweikart, Windsor E. Aguirre
DePaul Discoveries
This project examines the use of the 16S locus to amplify neotropical freshwater fishes native to Western Ecuador in a newly created 16S reference library for DNA barcoding and eDNA metabarcoding applications. Among the orders Characiformes, Siluriformes, Cichliformes, Gobiiformes, Cryprinodontiformes, Gymnotiformes, and Perciformes, a compendium of 105 specimens were sequenced, with 43 representing new 16S sequences previously unavailable on Genbank.
The Digitization Of Eatonia, Peter M. Grant
The Digitization Of Eatonia, Peter M. Grant
Faculty Articles & Research
The June 2023 issue of The Mayfly Newsletter features this article written by Dr. Peter Grant about the digitization of Eatonia by SWOSU University Archivist and Special Collections Librarian, Phillip Fitzsimmons, and Digitization Technician, Ben Dressler.
Recreational Fishing Location Guide, Department Of Primary Industries And Regional Development, Western Australia
Recreational Fishing Location Guide, Department Of Primary Industries And Regional Development, Western Australia
Fisheries occasional publications
This guide has been developed to help you identify the fishing locations that you may visit. The purpose of this guide is to enhance consistent and accurate identification of fishing locations and block numbers within each Bioregion. If you are unsure about a particular location, please discuss it with a representative of the Department of Primary Industries and Regional Development, Western Australia.
Practical Solutions To The Invasion Of Lionfish In Utila, Honduras: Science, Education, Food, And Jewelry, Carolyn Corley
Practical Solutions To The Invasion Of Lionfish In Utila, Honduras: Science, Education, Food, And Jewelry, Carolyn Corley
Undergraduate Honors Theses
Lionfish (Pterois sp.) are invasive species capable of devastating coral reef ecosystems due to their lack of predators, large appetites, generalist diet, high fecundity, and rapid spawning rates. As lionfish have expanded their distribution across the Caribbean, many conservation groups have taken it upon themselves to systematically remove these predators from environments where they are threatening native species. However, few have involved the community the way I observed while interning with the Whale Shark and Oceanic Research Center in Utila, Honduras. Protecting coral reefs is extremely important, especially in small communities like Utila, where the majority of people’s …
Pasturelands As Natural Climate Solutions: A Socioecological Study Of Tree Carbon And Beef Production Trade-Offs, Bela Starinchak
Pasturelands As Natural Climate Solutions: A Socioecological Study Of Tree Carbon And Beef Production Trade-Offs, Bela Starinchak
Masters Theses, 2020-current
Forest restoration is the most effective natural climate solution, with the potential to sequester 37% of the carbon dioxide (CO2) needed to reach the Paris climate mitigation goal. Cattle pastures offer an underutilized opportunity to increase global forest restoration efforts, improve biodiversity, and maximize carbon storage through the adoption of management strategies that prioritize the incorporation of trees into pasturelands. However, remote estimations of tree carbon storage in pastoral systems have never been field-verified and their accuracy is unclear. Furthermore, the effect of increased trees on cattle production is understudied across biomes. Lastly, the restoration potential of these …
Detecting Native Freshwater Mussels In Pennsylvania Waterways: Comparison & Validation Of Environmental Dna Methods, Meredith Bennett
Detecting Native Freshwater Mussels In Pennsylvania Waterways: Comparison & Validation Of Environmental Dna Methods, Meredith Bennett
Electronic Theses and Dissertations
North America is home to approximately one third of the world's freshwater mussel species. They are highly imperiled organisms due to habitat destruction and invasive species. Traditional surveys rely on visual identification of mussels, but individuals tend to be rare and difficult to identify. An alternative method is to extract environmental DNA (eDNA) from water samples, which has advantages over traditional sampling, including less sampling effort and fewer hazards to researchers and organisms. We conducted a review of the two main eDNA approaches: single-species detection and metabarcoding. We also developed and validated metabarcoding primers for the detection of native mussels. …
What Are The Impacts Of Deer Browsing And Japanese Stiltgrass (Microstegium Vinenium) On Native Sapling Growth In A Residential Wetland In Southeastern Georgia?, Josie Richards
Honors College Theses
Wetlands promote biodiversity, act as climate stabilizers, and regulate water flow, yet are vulnerable to invaders. An invasive species can affect the biodiversity, abiotic conditions, and increase vulnerability of an ecosystem over time and deer browsing can actively affect new growth by removing the apical buds of young woody vegetation. Japanese stiltgrass (Microstegium vimineum), a wetland specific invader, has been shown to compete against native species for limited resources and actively crowd them out. Growth of native saplings can be further complicated by the presence of white tailed deer (Odocoileus virginianus), which browse woody vegetation and limit recruitment of trees. …
Revision, Description, And Diagnosis Of Adult And Larval Pycnopsyche Spp. (Trichoptera: Limnephilidae) Using Morphological And Molecular Methods, Matthew Green
All Dissertations
The genus Pycnopsyche Banks, 1905 (Trichoptera: Limnephilidae) is the 2nd most species-rich genus of Nearctic Limnephilidae. Larvae and adults are ecologically diverse and widespread throughout eastern North America. Larvae construct cases from mineral or plant material and are frequently used by biomonitoring professionals at the species level to monitor trends in water quality. However, only two species of Pycnopsyche are currently separable as larvae, with diagnosis limited by the number of unknown larvae associated with known adults. Using morphological and molecular data, the phylogenetic relationships among Pycnopsyche species and species groups were inferred with Bayesian and Maximum Likelihood analyses to …
Zebrafish Feeding And Breeding: Adapting Best Practices For Zebrafish Husbandry, Abbigale Sullins
Zebrafish Feeding And Breeding: Adapting Best Practices For Zebrafish Husbandry, Abbigale Sullins
Scholars Day Conference
Zebrafish (Danio rerio) are a tropical, freshwater fish that serve as a key research model for human health and disease. The anatomical and genetic similarities shared by humans and zebrafish make establishing a zebrafish laboratory advantageous for undergraduate research and coursework. Zebrafish feeding protocols utilize two primary food types: dry (flake or pelleted) food and live prey such as artemia (brine shrimp) or rotifers. Adopting a feeding protocol that incorporates both dry and live feed optimizes considerations of nutrition and cost for maintaining healthy fish. Best practices for feeding were adapted from authoritative sources in the current literature and published …
The Bellarmine Bee Bed: Organizing A Native Plant Garden Using Feedback From The Local Community, Kate Moran
The Bellarmine Bee Bed: Organizing A Native Plant Garden Using Feedback From The Local Community, Kate Moran
Undergraduate Theses
Animal pollinators are the cornerstone of healthy ecosystems. Their survival is essential for the persistence of entire food chains: from the flowers they cross-pollinate directly, to the animals who depend on those plants for nutrition. The establishment of pollinator gardens—particularly ones that consist of native plants—is an effective way to enhance their biodiversity, abundance, and well-being.
The main goal of this thesis is to construct a pollinator garden that maximizes the benefits for animal pollinators using feedback from local gardeners. A survey was used to gather information about the popularity and preferences of 40 flowering plants, and after analyzing the …
Twenty Years Of Change In A Southeast Florida Acropora Cervicornis Thicket, Daniel Perez
Twenty Years Of Change In A Southeast Florida Acropora Cervicornis Thicket, Daniel Perez
All HCAS Student Capstones, Theses, and Dissertations
Acropora cervicornis is a species of stony coral that can exist in large thickets that provide functionally unique habitat. However, populations have declined by 98% in some areas of the Caribbean. Even in death, the structure from an A. cervicornis thicket provides surface area for the attachment of benthic organisms. Broward County Acropora (BCA) is an A. cervicornis thicket, located off Fort Lauderdale, Florida, which has been monitored since 2003. The objective of this study was to describe the temporal changes in community structure in response to 20 years of disturbances affecting BCA. Data was collected by taking images along …
Benthic Beasts: The Ecological Significance Of Lake Sturgeon And Blue Catfish In Eastern Appalachian Waterways, Stewart Thacker
Benthic Beasts: The Ecological Significance Of Lake Sturgeon And Blue Catfish In Eastern Appalachian Waterways, Stewart Thacker
Research Day
East Tennessee freshwater ecosystems comprise an abundance of an extremely diverse selection of species. This presentation examines Acipenser fulvescens and Ictalurus furcatus, two of the largest freshwater fish in the Appalachian area, which play significant ecological roles within the benthic dimension of our freshwater environments. Commonly known as “bottom-feeders,” Benthivorous species enjoy a broad range of food sources including other fish, detritus, crustaceans, and more. The extensive variety of food consumed by A. fulvescens and I. furcatus permits population control of other, denser, aquatic populations inhabiting other regions of the water column, as well as other organisms included …
Hide And Seek: An Exploration Of Antipredator And Predator Avoidance Mechanisms In Orthopodomyia Signifera In Response To Predation From Toxorhynchites Rutilus, Nathaniel Dahlberg
Hide And Seek: An Exploration Of Antipredator And Predator Avoidance Mechanisms In Orthopodomyia Signifera In Response To Predation From Toxorhynchites Rutilus, Nathaniel Dahlberg
Master's Theses
There have been many observations of larval Orthopodomyia signifera coexisting with the predator Toxorhynchites rutilus. There are three hypotheses that could explain how Or. signifera resists predation from Tx. rutilus. The first hypothesis states that larvae adapt behavioral changes that limit predation. The second hypothesis states thoracic setae serve as a physical defense that prevents Tx. rutilus from grasping Or. signifera. The third hypothesis states Or. signifera possess a chemical defense indicated by aposematic coloration. To test the first hypothesis larval Or. signifera were exposed to conspecific and heterospecific predation cues and their behavior was observed. Both cues …
Center For Grassland Studies, March 2023
Center For Grassland Studies, March 2023
Center for Grassland Studies: Newsletters
Contents
New Assistant Director for The Center for Grassland Studies, David Wedin
Center for Grassland Studies Policy Advisory Committee
Director's Column by Jerry Volesky (Interim Director)
Congratulations December 2022 Graduates
New Grazing Lands Ecologist for Grassland Studies, Nic McMillan
New Administrative Associate for Grassland Studies, Ashley Branting
Apply Now for CGS Scholarships and Assistantship, https://grassland.unl.edu/grassland-systems/grazing-livestock-scholarships
New Guidelines for Reducing Eastern Redcedar in Grasslands by Dillon Fogarty
Year One Barta Brothers Ranch Collaborative Adaptive Management Update by Craig Allen
Nebraska Grazing Conference, August 8-9, 2023 by Daren Redfearn
Forty Years Reflection on Grassland Fire Weather by David Wedin
Nebraska Youth Range …
Prairie Dogs, Gary Witmer, Jon Grant, Kendra Cross
Prairie Dogs, Gary Witmer, Jon Grant, Kendra Cross
Wildlife Damage Management Technical Series
Prairie dogs (Cynomys spp.) occur throughout the prairie states of middle North America from Mexico northward into Canada. They occupy a variety of habitats from prairies to high mountain valleys and sage brush-dominated deserts. The most common species is the black-tailed prairie dog (Cynomys ludovicianus; Figure 1). Prairie dogs are considered a “keystone species.” They provide habitat for many other native, grassland species. Prairie dogs live in colonies or “towns” that can span hundreds to thousands of acres. Depending on the species, their presence is evident by their burrow system. Despite the many ecosystem benefits prairie dogs provide by modifying …