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Articles 1 - 30 of 79
Full-Text Articles in Life Sciences
The Impact Of Beneficial Organisms In Corn Agroecosystems, Callie Rosalind Braley
The Impact Of Beneficial Organisms In Corn Agroecosystems, Callie Rosalind Braley
Doctor of Plant Health Program: Dissertations and Student Research
Corn is one of the world’s, and Nebraska’s, most important crops. Millions of acres are planted to corn each year in the Cornhusker State. However, each year there are a plethora of arthropod, weed, and microorganism pests that rob farmers of reaching their maximum yield potential. There are many options available to manage these pests in corn agroecosystems, but one option is often underutilized: beneficial organisms. For each pest, there are a variety of natural enemies that can assist in mitigating the damage caused by pests.
Many beneficial organisms exist, and they can be grouped by the type of pest …
The Brown Bear Gut Microbiome: A Novel Tool For Conservation & Management, Sarah M. Trujillo
The Brown Bear Gut Microbiome: A Novel Tool For Conservation & Management, Sarah M. Trujillo
All NMU Master's Theses
Gut microbiomes (GMBs), complex communities of microorganisms inhabiting the gastrointestinal tracts of their hosts, perform countless micro-ecosystem services such as facilitating energy uptake and modulating immune responses. While scientists increasingly recognize the role GMBs play in host health, the role of GMBs in wildlife ecology and conservation has yet to be realized fully. Here, I use brown bears (Ursus arctos) as an ecological model to investigate (1) how both extrinsic and intrinsic factors influence GMB community membership and structure; and (2) the correlation between GMB membership and brown bear health metrics. To achieve these aims, I subsampled archived …
Boxed In: Hinge Closing Performance Of Ornate Box Turtles (Terrapene Ornata), Gina L. Buelow
Boxed In: Hinge Closing Performance Of Ornate Box Turtles (Terrapene Ornata), Gina L. Buelow
MSU Graduate Theses
Turtles are perhaps best known for the bony shells that encase them, a unique morphological trait that provides protection against predators. Many taxa have even evolved the ability to enclose themselves using hinges that can be used to create a seal between the carapace and plastron. I measured the hinge closing force of Ornate Box Turtles (Terrapene ornata) to assess the performance of this unusual yet ecologically important trait. I sampled head-started turtles from Thomson Sand Prairie in the Upper Mississippi River National Wildlife and Fish Refuge and wild turtles collected in northern Oklahoma. To assess the effects of head-starting …
Estimating The Risk Of Future Plastic Marine Debris Resulting From The Urban Coastal Built Environment, Kelly C. Jones
Estimating The Risk Of Future Plastic Marine Debris Resulting From The Urban Coastal Built Environment, Kelly C. Jones
OES Theses and Dissertations
The growing urban built environment in the coastal zone poses an unknown risk to the marine biosphere as a source of marine debris. Plastic, since its introduction in the mid- 1900s, is now used in nearly all aspects of human life. Growth in human population and urbanization in coastal zones has resulted in the accumulation of large stocks of plastic in the coastal built environment, and these stocks are still growing exponentially. The coastal zone is exposed to a number of hazards including storms, tsunamis, and sea level rise, and most of these hazards are expected to change in the …
Multi-Strata Silvipastoral Systems For Increasing Productivity And Conservation Of Natural Resources In Central America, Muhammad Ibrahim, Andrea Schlonvoigt, Juan Carlos Camargo, M. Souza
Multi-Strata Silvipastoral Systems For Increasing Productivity And Conservation Of Natural Resources In Central America, Muhammad Ibrahim, Andrea Schlonvoigt, Juan Carlos Camargo, M. Souza
IGC Proceedings (1997-2023)
Conversion of primary forest to pasture is widespread in Central and Latin America and the progressive removal of trees has resulted in environmental degradation and a decline in productivity, simultaneously threatening rural livelihoods and regional biodiversity. Recently there has been keen interest to develop silvipastoral systems for sustainable animal production. Traditional silvipastoral systems are characterised with a diversity of woody perennials that plays an important role in supplying feed to animals in the dry season, production of timber, shade for animals, and in the conservation of natural resources. Improved novel woody perennials such as Morus alba (mulberry) and Trichanthera gigantea …
Willingness Of Non-Industrial Private Forest Landowners To Obtain A Private Versus Public Consultation, Erika Largacha
Willingness Of Non-Industrial Private Forest Landowners To Obtain A Private Versus Public Consultation, Erika Largacha
LSU Master's Theses
Promoting conservation practices among family forests landowners play a critical role to enhance forest health and ecosystem services. Several certification programs recognize such efforts, but participation among landowners varies based on their characteristics, program requirements, and incentives. One crucial step of certification is to obtain a forest management plan, but acquisition among landowners remains extremely low. Several studies suggest connecting landowners with foresters as the key element towards the adoption of forest management plans. Because foresters are typically employed by public forestry agencies or as private self-employed consultants, landowners' willingness to work with either may differ. As far as we …
Overfishing Drives Over One-Third Of All Sharks And Rays Toward A Global Extinction Crisis, Nicholas K. Dulvy, Nathan Pacoureau, Cassandra L. Rigby, Riley A. Pollom, Rima W. Jabado, David A. Ebert, Brittany Finucci, Caroline M. Pollock, Jessica Cheok, Danielle H. Derrick, Katelyn B. Herman, C. Samantha Sherman, Wade J. Vanderwright, Julia M. Lawson, Rachel H.L. Walls, John K. Carlson, Patricia Charvet, Kinattumkara K. Bineesh, Daniel Fernando, Gina M. Ralph, Jay H. Matsushiba, Craig Hilton-Taylor, Sonja V. Fordham, Colin A. Simpfendorfer
Overfishing Drives Over One-Third Of All Sharks And Rays Toward A Global Extinction Crisis, Nicholas K. Dulvy, Nathan Pacoureau, Cassandra L. Rigby, Riley A. Pollom, Rima W. Jabado, David A. Ebert, Brittany Finucci, Caroline M. Pollock, Jessica Cheok, Danielle H. Derrick, Katelyn B. Herman, C. Samantha Sherman, Wade J. Vanderwright, Julia M. Lawson, Rachel H.L. Walls, John K. Carlson, Patricia Charvet, Kinattumkara K. Bineesh, Daniel Fernando, Gina M. Ralph, Jay H. Matsushiba, Craig Hilton-Taylor, Sonja V. Fordham, Colin A. Simpfendorfer
Biological Sciences Faculty Publications
The scale and drivers of marine biodiversity loss are being revealed by the International Union for Conservation of Nature (IUCN) Red List assessment process. We present the first global reassessment of 1,199 species in Class Chondrichthyes-sharks, rays, and chimeras. The first global assessment (in 2014) concluded that one-quarter (24%) of species were threatened. Now, 391 (32.6%) species are threatened with extinction. When this percentage of threat is applied to Data Deficient species, more than one-third (37.5%) of chondrichthyans are estimated to be threatened, with much of this change resulting from new information. Three species are Critically Endangered (Possibly Extinct), representing …
Spotted Salamander Egg Masses Exhibit A Unique Internal Microbiome In Relation To Their Environment, Elizabeth Leonard
Spotted Salamander Egg Masses Exhibit A Unique Internal Microbiome In Relation To Their Environment, Elizabeth Leonard
Senior Honors Theses
Microbial studies have led to various ecological and medicinal discoveries. Amphibian eggs, like those of Ambystoma maculatum, exhibit natural resistance to bacterial invasion that may be microbiome related. The purpose of this research was to sequence the external and internal microbiome of A. maculatum egg masses and compare with the environmental microbiome. It was hypothesized that the external and internal microbiome would bear more similarity to each other than the water. A significant difference was observed between the microbiome of the inside surface of the egg mass and the water but not the outside surface of the egg and …
Attitudes And Interactions Of Indigenous And Non-Indigenous People With Wildlife In The Northern Talamanca Mountains Of Costa Rica, Carolina Saenz-Bolaños
Attitudes And Interactions Of Indigenous And Non-Indigenous People With Wildlife In The Northern Talamanca Mountains Of Costa Rica, Carolina Saenz-Bolaños
Doctoral Dissertations
In this study I investigated wildlife and human use of landscapes in the northern Talamanca Mountains of Costa Rica (Pacuare-Barbilla sector), including three contiguous protected areas (a national park, a forest reserve, and an indigenous territory), as well as surrounding unprotected areas. I describe and compare perceptions of wildlife by different social actors in the Pacuare-Barbilla sector, collecting information with a questionnaire as an instrument. I also inventoried and monitored the abundance and distribution of a variety of wildlife species occurring throughout the area using camera traps. The species with greater abundance or only occurrence in the national park were …
Avian Reproductive Success Is Associated With Multiple Vegetation Characteristics At An Active Grassland Restoration Site In Central Georgia, Kayla Allen, Katie Stumpf
Avian Reproductive Success Is Associated With Multiple Vegetation Characteristics At An Active Grassland Restoration Site In Central Georgia, Kayla Allen, Katie Stumpf
Georgia Journal of Science
Grassland bird populations are experiencing major declines due to habitat degradation, pesticide use, and fire suppression throughout North America. Large-scale grassland restoration efforts to improve and provide suitable habitat are ongoing, but there is little data on productivity of birds breeding in restored habitats, nor on the impact of specific vegetation characteristics on reproductive success. Since 2005, agriculture fields at Panola Mountain State Park in central Georgia have been undergoing restoration to warm-season grasslands; however, until now, data on nest success or productivity was lacking. The goals of this project were to: (1) quantify reproductive success and (2) determine which …
Can Providing Positive Interactions With Snakes Change A Person’S Perception Of Dangerous Wildlife Interactions?, Bethany Walker
Can Providing Positive Interactions With Snakes Change A Person’S Perception Of Dangerous Wildlife Interactions?, Bethany Walker
Theses
Due to a long co-evolutionary history between placental mammals and reptiles, primates demonstrate aversive responses to snakes. In humans, this can result in ophidiophobia, or the fear of snakes which can arise due to cultural backgrounds, traumatic experiences, or fear instilled by others. However, these reptiles fill essential roles in ecosystems. Conservation and outreach efforts are important to help our population understand snakes’ role in our lives and the state’s broader biodiversity. Negative experiences or preconceptions about snakes can make this message hard to share with the public. Educators can help prevent intentional harm to some of these organisms through …
Soil Not Oil: An Assessment Of The Role Of Earth Jurisprudence In Restoring Biodiversity Conservation In The Indigenous Bagungu Community, In Uganda, Joslyn Primicias
Soil Not Oil: An Assessment Of The Role Of Earth Jurisprudence In Restoring Biodiversity Conservation In The Indigenous Bagungu Community, In Uganda, Joslyn Primicias
Independent Study Project (ISP) Collection
An Earth-centered way of living is essential in Western Uganda, along with many more repressed regions affected by giant corporate evils. The purpose of this study was to assess the contribution of Earth Jurisprudence in the restoration of conservation in the Indigenous Bagungu community. More specifically, this study examines the customary laws and rituals used by the Bagungu, the strategies used to decolonize their culture, and their perspectives on foreign influence and globalization. Key-informant interviews were conducted with seven custodians and questionnaire-led interviews were administered to thirty-one clan members from the districts of Buliisa and Hoima. The study sample size …
Predictors Of Marine Genetic Structure In The Indo-Australian Archipelago, Udhi E. Hernawan, Paul S. Lavery, Gary A. Kendrick, Kor-Jent Van Dijk, Yaya I. Ulumuddin, Teddy Triandiza, Kathryn M. Mcmahon
Predictors Of Marine Genetic Structure In The Indo-Australian Archipelago, Udhi E. Hernawan, Paul S. Lavery, Gary A. Kendrick, Kor-Jent Van Dijk, Yaya I. Ulumuddin, Teddy Triandiza, Kathryn M. Mcmahon
Research outputs 2014 to 2021
The spatial genetic structure of marine organisms is related to dispersal and life-history traits, historical processes, current oceanographic connectivity and habitat features. Here, we assessed the relative importance of these factors for the genetic structure of a broad range of marine species in the Indo Australian Archipelago (IAA). We collated published data on 99 marine species from eight taxonomic groups (ascidians, fishes, molluscs, crustaceans, echinoderms, corals, reptiles, and marine plants) and used generalized linear models (GLMs) to estimate the best predictors of genetic structure. Genetic structure was characterized by FST and the number of genetic clusters over the study area. …
The Pandemic, Climate Change And Farm Subsidies, Allen H. Olson, Edward J. Peterson
The Pandemic, Climate Change And Farm Subsidies, Allen H. Olson, Edward J. Peterson
Journal of Food Law & Policy
Many people believe that once the COVID-19 pandemic has passed, life will return to the way it was. This belief is both unrealistic and dangerous. It is unrealistic because the virus will be around for years if not indefinitely. The timeframe for the worst of the pandemic will depend on our ability to administer effective vaccines worldwide and the public’s willingness to accept continued social distancing in the meantime. The damage done to public health, the economy and individuals is already substantial and will get worse. Recovery will be slow and incomplete. The belief that life will return to the …
Mr449: Allagash Wilderness Waterway Visitor Survey 2019, John J. Daigle, Ashley Cooper
Mr449: Allagash Wilderness Waterway Visitor Survey 2019, John J. Daigle, Ashley Cooper
Miscellaneous Reports
Quality in outdoor recreation can be defined as the degree to which recreation opportunities provide the experiences for which they are designed and managed. Key to protecting the backcountry experiences is an understanding of the different types of visitors to the Allagash Wilderness Waterway, each one with different needs and expectations, and the different levels of importance they place on recreation opportunities and conditions. In this report, visitor management implications and suggested further research focus on the diversity of use of the Allagash Wilderness Waterway in order to maximize the quality of the visitor experiences while protecting the unique natural …
Effects Of Patch Size, Fragmentation, And Invasive Species On Plant And Lepidoptera Communities In Southern Texas, James A. Stilley, Christopher A. Gabler
Effects Of Patch Size, Fragmentation, And Invasive Species On Plant And Lepidoptera Communities In Southern Texas, James A. Stilley, Christopher A. Gabler
Biology Faculty Publications and Presentations
Simple Summary
Human land use has removed habitats, separated habitats into small and disconnected fragments, and introduced foreign species, which all harm wildlife. South Texas is highly diverse and home to many endangered species, but human disturbance threatens its wildlife. In south Texas, we poorly understand how different aspects of human land use influence wildlife diversity and abundance. We studied this by surveying plants and butterflies in 24 habitat fragments in south Texas that differed in size, shape, type, and land use history. Human disturbance was extensive, and foreign and weedy species were dominant in most habitats. Habitat types had …Summer To Autumn Population Of Wild Eumaeus Atala On The Ft. Lauderdale Campus Of Nova Southeastern University, Alexandra M. Lens
Summer To Autumn Population Of Wild Eumaeus Atala On The Ft. Lauderdale Campus Of Nova Southeastern University, Alexandra M. Lens
Mako: NSU Undergraduate Student Journal
Eumaeus atala is an endangered tropical butterfly native to the Caribbean and some parts of Florida, USA. Following population reductions primarily due to habitat loss, E. atala populations are now increasing due to conservation efforts of its cycad host plants, especially Zamia integrifolia (coontie). The purpose of this study was to observe, document, and measure the population of wild E. atala on the Ft. Lauderdale, Florida campus of Nova Southeastern University where landscaping use of host plants supports a natural population of E. atala. Forty-four host plants located in two different sites were observed for 14 weeks. One site …
Cats And Wildlife: An Animal Welfare Perspective., John Hadidian
Cats And Wildlife: An Animal Welfare Perspective., John Hadidian
Management - General
While there is no question that outdoors cats have an impact on wildlife, the extent and significance of this impact is the subject of considerable debate. The controversy surrounding outdoor cats can be traced back at least a century, with contemporary claims of threats to global biodiversity bringing animal welfare and conservation interests directly into opposition, largely over the means of managing conflicts. The irony in this is that cat defenders and cat detractors generally agree that it is in the best interests of cats that they should be shielded from the vagaries of outdoor life. While there are practical …
Assessing The Short-Term Effects Of Translocation On Freshwater Mussels: Is Habitat Or Water Quality More Important?, Joshua D. Arnold
Assessing The Short-Term Effects Of Translocation On Freshwater Mussels: Is Habitat Or Water Quality More Important?, Joshua D. Arnold
Masters Theses
Freshwater mussels (Order: Unionida) are very important to the function of aquatic ecosystems and are typically indicators of good water quality. They provide a valuable link between the water column and the benthic substrate in which they live and are a valuable food resource for many species of animals. However, most species native to North America are currently threatened with extinction, to the point that more than 70% of native freshwater mussels are listed as either threatened or endangered at the state or federal level. The cause of this decline can be attributed to historical over exploitation, habitat alteration, and …
Genetic Population Dynamics Of The Critically Endangered Scalloped Hammerhead Shark (Sphyrna Lewini) In The Eastern Tropical Pacific Ocean, Sydney P. Harned
Genetic Population Dynamics Of The Critically Endangered Scalloped Hammerhead Shark (Sphyrna Lewini) In The Eastern Tropical Pacific Ocean, Sydney P. Harned
All HCAS Student Capstones, Theses, and Dissertations
The scalloped hammerhead shark, Sphyrna lewini, is a Critically Endangered, migratory species known for its tendency to form large aggregations of mostly adult females, especially in the heavily-fished Eastern Tropical Pacific (ETP) Ocean. This species forms iconic, visually spectacular, seasonal aggregations in the northern Galápagos Islands, and it is hypothesized based on telemetry studies that pregnant females from these aggregations migrate to mainland coastal nurseries for parturition. This study investigated the population genetic dynamics of the scalloped hammerhead across most of its coastal and offshore distribution (Mexico to Ecuador) in the ETP, focusing on young-of-the-year animals sampled from nursery …
Toxicology Of Chemical Stress To Monarch Butterflies (Danaus Plexippus L.), Annie Krueger
Toxicology Of Chemical Stress To Monarch Butterflies (Danaus Plexippus L.), Annie Krueger
Department of Entomology: Dissertations, Theses, and Student Research
Monarch butterfly (Danaus plexippus L.) population declines have caught the attention of the country and prompted nationwide conservation initiatives. The United States Fish and Wildlife Service has identified insecticide exposure and loss of milkweed (Asclepias spp.) reproductive habitat as primary threats to the monarch. In the Midwestern US, milkweed largely occurs around cropland borders where there may be a spatial and temporal overlap of monarch larvae, insecticide usage, and fertilizer applications. In this study, the acute toxicity and sub-lethal effects on growth and diet consumption of two commonly used pyrethroid insecticides, bifenthrin and beta-cyfluthrin, were characterized …
Pacific Black Duck Ecology And Habitat Assessment In Aunu'u, American Samoa, And Their Relationship To Other Mallard-Like Ducks Of Oceania, Greater Indonesia, And The Philippines, Marissa Kaminski
Open Access Theses & Dissertations
Determining a species’ ecological needs, assessing the quality of their habitat, and determining genetic differentiation and connectivity among populations is essential to their conservation. My dissertation focuses on obtaining such a holistic view for a population of Pacific Black Ducks recently established on the Island of Aunu’u, American Samoa. Specifically, I present the first evaluation of the ecology and habitat of a recently established population of Pacific Black Ducks on the Island of Aunu’u, American Samoa, in Chapter 1, while I assess the genetic connectivity and relationship of this population to other Mallard-like ducks found in Greater Indonesia, Oceania, and …
Corbicula Fluminea Effects On Survival, Growth, And Drift Of Juvenile Lampsilis Siliquoidea In Laboratory Exposures, Allison Nicole Sieja
Corbicula Fluminea Effects On Survival, Growth, And Drift Of Juvenile Lampsilis Siliquoidea In Laboratory Exposures, Allison Nicole Sieja
MSU Graduate Theses
The Asian clam, Corbicula fluminea, is an invasive species that is abundant and often co-occurs with native freshwater mussels. Corbicula is widely suspected of having negative effects on native mussels, but few studies have empirically tested this hypothesis. I used laboratory experiments to evaluate how adult Corbicula affected the survivorship, growth, and drift of juvenile Lampsilis siliquoidea. Survival and growth of newly metamorphosed mussels were tested in downwelling flow-through chambers with glass-bead substrate. Treatments were control (no clams), small adult clams, or large adult clams. After 28 days, large clams slightly but significantly reduced the number of juveniles …
The Effects Of Acid Rain Mitigation Efforts On The Behaviour-Dependent Movement Of Migrating Atlantic Salmon (Salmo Salar, L.) Smolts, Omar Salem Taboun
The Effects Of Acid Rain Mitigation Efforts On The Behaviour-Dependent Movement Of Migrating Atlantic Salmon (Salmo Salar, L.) Smolts, Omar Salem Taboun
Electronic Theses and Dissertations
Acidification has led to changes in the chemistry of fresh waters and has impacted the survival of Atlantic Salmon (Salmo salar), an endangered anadromous fish species. Liming, which has been implemented to restore freshwater ecosystems, has been demonstrated to restore a suitable pH for Atlantic Salmon, however, it remained unknown to what extent liming can restore the underlying behavioural traits and migration behaviour of smolts. We captured 116 smolts from two freshwater river treatments in Nova Scotia, Canada: acidified Little River (n=17) and lime-treated West River (n=99). We performed stream-side behavioural assays and discerned five behavioural metrics: (1) …
The Conservation Of Grasslands And Rangeland By Pastoralists: Challenges And Opportunities, Thomas M. Loquang
The Conservation Of Grasslands And Rangeland By Pastoralists: Challenges And Opportunities, Thomas M. Loquang
IGC Proceedings (1997-2023)
No abstract provided.
Biodiversity Of Plants And Animals In Grassland Systems: Approaches To Conservation And Restoration In England, S. Peel, S. P. Chaplin
Biodiversity Of Plants And Animals In Grassland Systems: Approaches To Conservation And Restoration In England, S. Peel, S. P. Chaplin
IGC Proceedings (1997-2023)
No abstract provided.
Recent Initiatives In Biodiversity Conservation In Grazed Temperate Grasslands And Woodlands In Australia, Ian Lunt, John Morgan, Louise Gilfedder, Richard J. Williams, Simon Foster
Recent Initiatives In Biodiversity Conservation In Grazed Temperate Grasslands And Woodlands In Australia, Ian Lunt, John Morgan, Louise Gilfedder, Richard J. Williams, Simon Foster
IGC Proceedings (1997-2023)
No abstract provided.
Conservation Of South Florida Orchid Mycorrhizal Fungi, Ellen Garcia
Conservation Of South Florida Orchid Mycorrhizal Fungi, Ellen Garcia
FIU Electronic Theses and Dissertations
Starting in the late 1800’s orchids were heavily poached, leaving many species to reach critically low numbers. Coupled with habitat loss and urbanization many orchid populations were extirpated in southern Florida. Due to lack of endosperm, orchid seeds are reliant on specific mycorrhizal fungi to obtain nutrients to enable growth and development resulting in very low germination rates in nature. The obligate relationship on mycorrhizal fungi complicates orchid re-establishment. The research project aims are (1) to evaluate the correlation between phenotypic traits and optimal growing conditions in various micro-climate, and (2) to assess the range of mycorrhizal fungi community in …
Examining The Presence Of A Possible Species Complex Of Octopus Joubini (Cephalopoda: Octopodidae) In The Eastern Gulf Of Mexico, Haley Holloway
Examining The Presence Of A Possible Species Complex Of Octopus Joubini (Cephalopoda: Octopodidae) In The Eastern Gulf Of Mexico, Haley Holloway
USF Tampa Graduate Theses and Dissertations
The Pygmy Octopus Octopus joubini (Robson, 1929) is a small, shallow water species found throughout the Gulf of Mexico (GoM), western Atlantic Ocean and the northeastern Caribbean Sea (Mather, 1982; Jereb & Roper, 2014; Judkins, 2009). This species is believed to belong to a complex based upon morphological features including arm length, web depth, sucker size, egg size, hatchling ecology, and chromatophore coloration. It has been proposed that Octopus mercatoris, another pygmy species found in the GoM, may belong in this complex; however, no analyses have been performed to verify this claim. The present study incorporated morphological comparisons with …
Isolation And Characterization Of Polymorphic Microsatellite Loci In Achnatherum Inebrians And A. Sibiricum, Na Chen, Chunjie Li
Isolation And Characterization Of Polymorphic Microsatellite Loci In Achnatherum Inebrians And A. Sibiricum, Na Chen, Chunjie Li
IGC Proceedings (1997-2023)
No abstract provided.