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Intra-Population Variation Of Hair And Fingernail Stable Hydrogen, Oxygen, Carbon And Nitrogen Isotopes In London, Ontario, Canada Residents During The Covid-19 Pandemic, Sawyer C E Rowe

Electronic Thesis and Dissertation Repository

Lockdowns and travel restrictions during the COVID-19 pandemic forced a significant fraction of London, Ontario, Canada residents to remain in one location for long enough to reach isotopic equilibrium with their primary drinking water source(s). This situation created ideal natural conditions for measuring the isotopic fractionation between the stable hydrogen and oxygen isotopes of drinking water and hair or nail tissues, and for determining the magnitude of intra-population variation in tissue δ²H and δ¹⁸O. Hair and nail of participants who reported exclusively drinking London municipal tap water spanned much larger δ²H and δ^{18 …}

Using Stable Isotopes To Understand Survival Versus Extinction Of Late Pleistocene Muskoxen, Stephanie Mabee

Electronic Thesis and Dissertation Repository

This thesis uses stable isotopes to investigate the adaptive advantages of Ovibos moschatus, a muskox, relative to now-extinct Pleistocene megafauna in eastern Beringia (Yukon Territory and Alaska), including another muskox Bootherium bombifrons. Ecological niches were defined for Ovibos and Bootherium using stable carbon and nitrogen isotope compositions of bone collagen. Plant remains trapped in modern Ovibos molars were used to determine the carbon and nitrogen isotope collagen-diet discrimination factors, which were then applied to ancient specimens. Ovibos possessed larger isotopic – and hence ecological – niches than Bootherium across eastern Beringian sites. The larger niche suggests that Ovibos …

Reconstructing Subsistence Practices Of Southwestern Ontario Late Woodland Peoples (A.D. 900-1600) Using Stable Isotopic Analyses Of Faunal Material, Zoe H. Morris

Electronic Thesis and Dissertation Repository

Stable carbon–, nitrogen–, and oxygen–isotope analyses of animal bones and teeth from 28 archaeological sites are used to reconstruct human subsistence behaviour, i.e., increased maize horticulturalism, during the Late Woodland period (A.D. 1000–1650) in southwestern Ontario. The isotopic data provided dietary, seasonal, and geographic information, which was analysed within archaeological, symbolic, and ecological contexts and used to reconstruct the diets, hunting patterns, and animal processing practices of two neighbouring groups, the Ontario Iroquoian and Western Basin peoples.

Paleodietary and seasonality analyses focused on the following species: canids (domestic dogs, foxes, and wolves), wild turkeys and white-tailed deer, though additional fauna …

Exploring The Movement Of People In Postclassic And Historic Period Lamanai Using Stable Isotopes, Alicia E. Donis

Electronic Thesis and Dissertation Repository

The location of the Maya site of Lamanai on the New River Lagoon in northern Belize strategically situated it to participate in both coastal and inland trade routes and communication. This study of human burials at Lamanai examines the phosphate-oxygen isotope compositions of bone and enamel, which reflect drinking water and hence climatic zones, oxygen- and hydrogen-isotope compositions of modern local water, which provide a baseline for drinking water, and carbon- and nitrogen-isotope compositions of bone collagen, which reflect diet. The combination of isotopic, mortuary, osteological, and artifactual data is used to explore mobility at Lamanai during the Postclassic and …

A Multi-Isotope Investigation Of Two Medieval German Populations: Insight Into The Relationship Among Diet, Disease, And Tissue Isotopic Compositions, Karyn C. Olsen

Electronic Thesis and Dissertation Repository

This thesis investigates the relationship between disease and bone collagen isotope compositions, and uses isotopic analyses of human and faunal bone to examine the diet and geographic associations of two medieval (9th to 16th century) German communities derived from urban (Regensburg, n=111) and rural (Dalheim, n=24) contexts.

The first goal of this research was to determine the reliability of bone collagen isotopic compositions to characterize diet in unhealthy individuals. Examples of bone pathology were selected from two medieval samples and one modern/historic skeletal collection (n=49) in order to measure the extent to which pathology influences intra-skeletal isotopic variability. The carbon- …

Origins Of Stable Isotopic Variations In Late Pleistocene Horse Enamel And Bone From Alberta, Nicolle S. Bellissimo

Electronic Thesis and Dissertation Repository

Oxygen and carbon isotopic measurements of coevally formed bone and tooth enamel bioapatite from a modern equid show that these tissues record drinking water and diet isotopic signals in an identical fashion. Hence, data for both tissues can be combined to track movement, dietary changes, and seasonal variability over the animal’s lifetime, and climatic variability over longer time periods. This tool was tested for horses using ten paired tooth and bone samples to reconstruct conditions in Alberta during the Late Pleistocene. While post-mortem isotopic alteration confounded interpretation of the results, two key findings emerged: (i) pre- and post-Last Glacial Maximum …

Late Pleistocene Climate And Proboscidean Paleoecology In North America: Insights From Stable Isotope Compositions Of Skeletal Remains, Jessica Z. Metcalfe

Electronic Thesis and Dissertation Repository

This thesis uses the carbon, nitrogen, and oxygen isotope compositions of mammoth (Mammuthus) and mastodon (Mammut) skeletal remains to reconstruct paleoclimate and paleoecology in Late Pleistocene North America. Analytical methods, sampling strategies, environmental adaptations and seasonal behaviors of proboscideans were investigated.

Reliable and reproducible results are crucial for a study of this nature. A persistent methodological problem in the isotope analysis of structural carbonate in bioapatite was solved by reacting bioapatite under “sealed vessel” conditions.

Growth rate determinations are critical for designing sampling strategies and interpreting results. Histological and isotopic measurements demonstrated variations in enamel growth …