Lana Williams

Improving stable isotopic interpretations made from human hair through reduction of growth cycle error.

A recent trend in stable isotopic analysis involves the reconstruction of short-term variations in diet using hair segments. However, bulk hair samples typically contain a growth cycle error, which may conceal or confound the most recently incorporated isotopic information. It is assumed that, at any given time, ∼85-90% of scalp hairs are actively growing, while the remaining 10-15% have transitioned into a resting or inactive phase, which lasts up to 4 months before hairs are shed. This study uses growth phase to determine the effects of age, sex, and health status on carbon and nitrogen isotopic ratios of hair analyzed in sequential segments. For this study, we selected archaeological hair samples from 10 individuals from Dakhleh Oasis, Egypt. Isotopic analyses of actively growing hair segments were compared to those for mixed growth phase segments from each individual. These data demonstrate the presence of growth cycle error and show that an understanding of structural-functional relationships is essential for interpreting normal versus pathological changes in hair follicle and fiber production. In situations where diet change and mobility produce variations in an individuals isotopic composition, elimination of positional-temporal error in sequential segment hair analyses can facilitate greater understanding of intraindividual metabolic reactions and changes in hair growth cycles. Phase identification may aid in determining the presence of pathological conditions in individuals, especially in those lacking skeletal indications, and provide a more precise estimation of seasonal dietary patterns, access to changing food resources, and metabolic equilibration to a new locality.

Shattered lives and broken childhoods: Evidence of physical child abuse in ancient Egypt

Much can be learned about cultural attitudes of violence towards children from the analyses of their skeletal remains and mortuary patterns of the communities in which they lived and died. A bioarchaeological approach integrating biological, socio-cultural, and physical environments is used in analyzing the remains of a 2-3-year-old child from Kellis 2, a Romano-Christian period cemetery in the Dakhleh Oasis, Egypt. The skeletal remains of this individual show an unusual pattern of trauma and healing events, possibly indicating multiple episodes of non-accidental trauma. Macroscopic, radiographic, and histologic analyses show the extent of the skeletal trauma and healing, while stable carbon and nitrogen analyses of bone and hair reveal metabolic disturbances and changes in diet correlated with these traumatic events. Results from the differential diagnosis demonstrate that this individual exhibits skeletal fracture and healing patterns consistent with repeated non-accidental trauma, which may or may not have resulted in death. In addition, this individual may also represent the earliest documented case of violence against children from an archaeological context.

Forensic Recovery of Human Remains: Archaeological Approaches, Second Edition

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An exploration of adult body shape and limb proportions at Kellis 2, Dakhleh Oasis, Egypt

Several studies have shown that the human body generally conforms to the ecogeographical expectations of Bergmanns and Allens rules; however, recent evidence suggests that these expectations may not hold completely for some populations. Egypt is located at the crossroads of Sub-Saharan Africa, Southern Europe, and the Near East, and gene flow among groups in these regions may confound ecogeographical patterning. In this study, we test the fit of the adult physique of a large sample (N = 163) of females and males from the Kellis 2 cemetery (Dakhleh Oasis, Egypt) against ecogeographical predictions. Body shape (i.e., body mass relative to stature) was assessed by the femur head diameter to bicondylar femur length index (FHD/BFL), and brachial and crural indices were calculated to examine intralimb proportions. Body shape in the Kellis 2 sample is not significantly different from high-latitude groups and a Lower Nubian sample, and intralimb proportions are not significantly different from mid-latitude and other low-latitude groups. This study demonstrates the potential uniqueness of body shape and intralimb proportions in an ancient Egyptian sample, and further highlights the complex relationship between ecogeographic patterning and adaptation.

Death and Disability in a Younge Phase Community

Abstract Roffelsen is an early Younge phase mortuary component in southwestern Ontario. The single burial feature is a pit containing the articulated skeletons of seven successively buried individuals, ranging in age from a few months to late middle age. All had been stripped of soft tissues, except for the connecting tissues that maintained their articulation. Most also had a disk cut from the cranium and a hole drilled near bregma. All but the infant display various forms of developmental failure of the outer and middle ear and the petrous portion of the temporal bone. The pit was apparently the burial facility for an extended family with significant hearing impairments. This disability may have limited their interaction with neighboring communities, perhaps even playing a role in their eventual disappearance as a separate community.

Reconstructing diet in Napoleon's Grand Army using stable carbon and nitrogen isotope analysis

OBJECTIVES Historical evidence has provided information regarding disease and mortality in Napoleon Bonapartes Grand Army, but dietary information beyond individual soldier accounts remains scarce. The purpose of this research is to reconstruct the diets of Napoleons multiethnic army who were associated with the Russian Campaign of 1812. MATERIALS AND METHODS We conducted stable carbon and nitrogen isotope ratio analysis on femoral bone collagen of 78 individuals recovered from a salvage excavation at the mass gravesite of Šiaurės miestelis in Vilnius, Lithuania. These individuals were later discovered to be Napoleonic soldiers and camp followers who participated in the 1812 Russian Campaign. RESULTS Stable carbon isotope ratios range from -19.2‰ to -11.8‰, with a mean of -17.8‰ ± 1.5‰ (1 σ). Stable nitrogen isotope ratios range from 7.1‰ to 13.6‰, with a mean of 10.5‰ ± 1.4‰ (1 σ). Both δ13 C and δ15 N values show a wide range of variation. DISCUSSION Stable isotope data indicate considerable dietary variation in this population associated with a multiethnic and socially stratified military population. Diets ranged from predominantly C3 -based to predominantly C4 -based, with varying inputs of terrestrial, freshwater, and marine animal protein. Comparison with other European populations further denotes the exceptional range of dietary variation of soldiers and camp followers in Napoleons army.

Growth of the pectoral girdle in a sample of juveniles from the kellis 2 cemetery, Dakhleh Oasis, Egypt

This study investigates growth patterns in the scapula and clavicle in a cross‐sectional juvenile skeletal sample ranging from 20 weeks gestation to 8.5 years of age from the Kellis 2 cemetery, Dakhleh Oasis, Egypt. The primary goal is to quantify growth patterns and growth velocities in the scapula and clavicle to better understand the development of the pectoral girdle.

Ontogenetic changes in intralimb proportions in a Romano-Christian period sample from the Dakhleh Oasis, Egypt

The purpose of this study is to document the appearance of adult patterns in intralimb indices during ontogeny in a skeletal sample from the Kellis 2 cemetery, Dakhleh Oasis, Egypt. In addition, this study explores evolvability in intralimb indices to understand relative differences in sensitivity to ecogeographic variables.