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Full-Text Articles in Life Sciences
Genetic Differentiation Of Two Species Of Buckwheat (Eriogonum), Jenessa Blotter Lemon
Genetic Differentiation Of Two Species Of Buckwheat (Eriogonum), Jenessa Blotter Lemon
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Limestone mining in the San Franicso Mountain Range of west central Utah threatens the survival of a rare endemic species of buckwheat (Eriogonum soredium). This species is an edaphic endemic, only found growing on the outcrops of the Ordovician limestone mines in the area. Eriogonum soredium is a candidate for governmental protection under the Endangered Species Act (ESA). However, a common, widespread buckwheat (Eriogonum shockleyi) appears to be closely related to the narrow endemic. The genetic relatedness of the rare and and common species will greatly influence the decision of United States Fish and Wildlife Service …
Genetic Approaches To Population Ecology And Conservation Of The Sacramento Mountain Salamander, Samantha Jo Nicole Cordova
Genetic Approaches To Population Ecology And Conservation Of The Sacramento Mountain Salamander, Samantha Jo Nicole Cordova
Biology ETDs
Aneides hardii (Sacramento Mountain salamander) is restricted to high-elevation habitat that is fragmented by low-elevation piñon-juniper woodland. Aneides hardii is a species of conservation concern in New Mexico, in part, because disease and climate change endanger its long-term persistence. In this study, we use sequence data from the mitochondrial cytochrome b gene and a microsatellite locus of A. hardii to addresses the timing and scale of population subdivision. We also calculated genetic diversity measures and compared them among mountain ranges to explore demographic history of A. hardii. Twenty-six haplotypes and three genetically distinct lineages were identified, and each haplotype …
The Population Genetics Of Morro Bay Eelgrass (Zostera Marina), Julia Gardner Harencar
The Population Genetics Of Morro Bay Eelgrass (Zostera Marina), Julia Gardner Harencar
Master's Theses
Seagrass populations are in decline worldwide. Zostera marina (eelgrass), one of California’s native seagrasses, is no exception to this trend. In the last 8 years, Morro Bay, California has lost 95% of its eelgrass. Eelgrass is an ecosystem engineer, providing important ecosystem services such as sediment stabilization, nutrient cycling, and nursery habitats for fish. The failure of recent restoration efforts necessitates a better understanding of the causes of eelgrass decline in this estuary. Previous research on eelgrass in California has demonstrated a link between population genetic diversity and eelgrass bed health, ecosystem functioning, and resilience to disturbance and extreme climatic …
Effective Population Size, Demography, And Viability Of Eastern Massasaugas (Sistrurus Catenatus) In Southwest Michigan, Danielle R. Bradke
Effective Population Size, Demography, And Viability Of Eastern Massasaugas (Sistrurus Catenatus) In Southwest Michigan, Danielle R. Bradke
Masters Theses
As humans increasingly exploit natural areas, wildlife populations face a growing number of threats that often result in population decline and isolation. Small, isolated populations are vulnerable to extirpation due to both genetic and demographic factors. Yet, low detectability of many imperiled species often precludes the collection of population-level data important for assessing population viability and implementing successful conservation. The eastern massasauga (Sistrurus catenatus) is a cryptic pitviper that has been extirpated throughout much of its historic range due to agricultural conversion of wetland habitat and other synergistic threats. Consequently, this species is federally listed as threatened in both the …
Differentiating The Neches River Rose Mallow (Hibiscus Dasycalyx) From Its Congeners By Means Of Phylogenetics And Population Genetics, Julia Norrell
Differentiating The Neches River Rose Mallow (Hibiscus Dasycalyx) From Its Congeners By Means Of Phylogenetics And Population Genetics, Julia Norrell
Biology Theses
This study used molecular phylogenetic methods to attempt to resolve the taxonomic status of the federally threatened East Texas-endemic wildflower, the Neches River Rose Mallow (Hibiscus dasycalyx). Hibiscus dasycalyx co-occurs with two other closely related congeners that are currently not of conservation concern: the halberdleaf rose mallow (H. laevis); and the crimson-eyed rose mallow (H. moscheutos). This study assessed the phylogeny of these three Hibiscus species, and attempted to determine if there is possible hybridization occurring between them. To this end, Restriction Site Associated DNA Sequencing (RAD-Seq), a Next Generation Sequencing method, was used …
Understanding The Past, Present, And Future Of Land Conservation In South Carolina, Nicole Berson
Understanding The Past, Present, And Future Of Land Conservation In South Carolina, Nicole Berson
Graduate Theses
Urbanization poses a significant challenge for many ecosystems in the United States. However, monitoring its impacts requires extensive data and this lack of up-to-date information makes understanding the impacts of urbanization difficult to assess. One area that has seen tremendous growth is the Interstate 85 (I-85) corridor between Charlotte, NC and Atlanta, GA, which is known as “The Boom Belt.” Unfortunately, due to limited resources from conservation and state agencies, data on land use change and its impacts in this area have not been updated since the early 1990s. To investigate how urbanization is impacting this region, I conducted a …
Restoration Of Black Oak (Quercus Velutina) Sand Barrens Via Three Different Habitat Management Approaches, David J. Kriska
Restoration Of Black Oak (Quercus Velutina) Sand Barrens Via Three Different Habitat Management Approaches, David J. Kriska
ETD Archive
Disturbance regimes, i.e. frequent fires, historically maintained oak barrens until European settlement patterns, and eventually, Smoky the Bear and the fire suppression campaign of the U.S. Forest Service snuffed out the periodic flames. In the absence of a disturbance regime, ground layer floral composition at many historical oak sand barrens will change predominantly because of a buildup of leaf litter and shading of the soils. Termed mesophication, this process of ecological succession will drive Black Oak Sand Barrens to an alternate steady state. A survey conducted on Singer Lake Bog in Green, Ohio, demonstrated that succession shifted the community to …