Bethany L. Turner

Analysis of nutritional disease in prehistory: The search for scurvy in antiquity and today

In this paper, we discuss the issues surrounding the study of scurvy, or vitamin C deficiency, in paleopathology, and highlight the work of Donald Ortner in advancing this area of research. This micronutrient deficiency impacts collagen formation and results in damage to a variety of bodily tissues. While clinical manifestations are observed routinely, the lack of specific signatures on bone makes paleopathological diagnosis difficult. Rapid growth in infants, children, and subadults provides abundant remodeled tissue and an increase in vascularization that makes identification possible in younger segments of the population. However, diagnosis of scurvy in adults remains problematic, given that diagnostic lesions are strikingly similar to those associated with rickets, osteomalacia, and other conditions. We argue that this confounding factor underscores the need for a broader anthropological approach to scurvy research that expands beyond differential diagnosis to include more accurate reconstruction of diets and available resources, greater consideration of the possibility - even likelihood - of multiple nutrient deficiencies simultaneously affecting an individual, and the patterning of these deficiencies along lines of status, sex, and age.

Diet, residential origin, and pathology at Machu Picchu, Peru.

Pathological conditions in human skeletal remains provide a wealth of information about archaeological populations, but many are limited in their interpretive significance by their nonspecific etiologies. This study analyzes three common pathological conditions known to manifest in infancy and childhood in the skeletal population from Machu Picchu, Peru (N = 74) with published carbon, nitrogen, oxygen, strontium, and lead isotopic data (Turner et al.: J Archaeol Sci 36 (2009) 317-332; Turner et al.: Chungara: Revista de Antropología Chilena 42 (2010) 515-524) to distinguish early-life diet from residential origins as significantly associated with pathologies among the sites inhabitants. Analyses of variance indicate highly significant variation between enamel δ(18)O values, which serve as a rough proxy of local environment, and both cribra orbitalia (CO) and porotic hyperostosis (PH), generally understood to be markers of anemia. Results tentatively suggest that individuals manifesting these lesions may have lived closer to the arid coasts; however, no significant variation was found in parameters of diet (enamel δ(13) C(carbonate), dentin δ(13) C(collagen), dentin δ(15)N) by either CO or PH, suggesting that the primary factors causing anemia may have been more significantly related to residential origin rather than diet. Linear enamel hypoplasia (LEH) frequency significantly varied by both dietary and residential parameters, supporting models of LEH formation from a synergy of dietary and environmental factors. These results support previous research on the etiology of PH in the Andes; they also represent a useful approach to refining site-specific interpretations of pathological conditions in archaeological populations, and exploring etiological variation between populations.

The variable roads to sacrifice: Isotopic investigations of human remains from Chotuna‐Huaca de los Sacrificios, Lambayeque, Peru

This study investigates two key variables-residential context and subsistence-among sacrificial victims dating to the Late Horizon (A.D. 1450-1532) in the Huaca de los Sacrificios at the Chotuna-Chornancap Archaeological Complex in north coastal Peru. We investigate whether aspects of sacrifice in this distant coastal province mirrored that found in Inca heartland contexts such as the capacocha, or remained more typical of coastal sacrificial traditions. Stable carbon, nitrogen, and oxygen isotope values were characterized in bone carbonate, bone collagen, and hair keratin to estimate geographic residence during the decade before death and diet in the decade, versus months, before death. Bone δ18 Ocarbonate values have a mean (±SD) of 26.8 ± 1.1%, bone δ13 Ccarbonate values -6.7 ± 1.7%, and bone δ(13) Ccollagen values 11.8 ± 1.3%; bone δ15 Ncollagen values have a mean of 11.5 ± 1.3%. Combined hair δ13 Ckeratin values have a mean of -12.8 ± 1.6%, and hair δ15 Nkeratin values 10.8 ± 1.3%. In contrast to contemporaneous coastal and highland contexts, we are unable to identify immigrants among the sacrificed individuals or changes in diet that indicate provisioning with a standardized diet leading up to death. Instead, results suggest that victims were local to the area, but consumed moderately variable diets consistent with local subsistence patterns. These findings suggest a distinct pattern of human sacrifice in the Late Horizon and underscore the regional and temporal variation in sacrificial practices in the central Andes.

Stable Isotopic Reconstruction of Diet and Residential Mobility in a Postbellum African American Community in Rural Georgia

Abstract Despite popular belief, the Great Migration following the Civil War was not a singular event but a long-term demographic phenomenon marked by freed African Americans returning to their natal communities or establishing new communities elsewhere and was presaged by smallerscale movements of African Americans between different regions of the Emancipation-era South. This study analyzes carbon and oxygen (δ13C, δ18O) stable isotope ratios in enamel carbonate from 34 individuals recovered from the Avondale Burial Place, an Emancipation-era cemetery, in Macon, Georgia, in order to reconstruct residential origin and early-life diet and examine whether these individuals immigrated to the site from elsewhere in the South. Carbon isotope results suggest mixed C3/C4 agro-pastoral subsistence rather than a reliance on C4 products such as corn and corn-fed livestock as suggested by historical accounts. Oxygen isotope results suggest that the majority of individuals buried in the Avondale Burial Place were likely born in the area as well; in comparison with other isotopic studies from postbellum contexts, these results support the interpretation that the Great Migration was a gradual process with varying impacts in different areas. Interestingly, a sex-based divergence in both carbon and oxygen isotope values during childhood suggests differences in diet and water consumption possibly related to divergent gender roles. Overall, these results indicate that despite continued hardships, the members of this community consisted of local residents, and they do not indicate the presence of migrant individuals; this isotopic analysis, therefore, contributes to a growing body of bioarchaeological research reconstructing the lost and varied histories of postbellum African American communities.

Primates, Pathogens, and Evolution: A Context for Understanding Emerging Disease

The world is rife with potential pathogens. Of those that infect humans, it is estimated that roughly 20 % are of nonhuman primate origin. The same ease characterizes pathogen transmission in the other direction, from humans to nonhuman primates. This latter problem has increasingly serious ramifications for conservation efforts, as growing numbers of ecotourists and researchers serve as potential vectors of disease. Here, we present an analysis of major cross-species transmission events between human and nonhuman primates. In particular, we consider HIV and malaria as case studies in which nonhuman primate pathogens emerged and became permanent fixtures in human populations. The human practices that facilitate such events are considered, as well as the evolutionary consequences of these events. In addition, we describe human-to-nonhuman primate transmission events and discuss the potential of human pathogens to adapt to nonhuman primate hosts. The topic of emerging infections is addressed, in both human and nonhuman species, in light of changing patterns of contact and novel adaptations on the part of pathogens and hosts.

Urban political ecology in late prehistory: New evidence from El Purgatorio, Peru

One of archaeologys greatest strengths is its reliance on interdisciplinary collaboration and the utilization of multiple lines of evidence to inform archaeological interpretation. For example, through an examination of faunal and floral remains, production and storage facilities, and the isotopic analysis of human skeletal remains one can develop a model for urban political ecology in ancient cultures. In this case study, the political ecology of the Casma capital city, El Purgatorio, Peru, is investigated in order to inform our interpretations and conclusions regarding Casma political, economic and social organization. The results indicate that Casma political ecology was firmly based in coastal resources and oriented towards supporting state-sponsored feasting and ritual activities, suggestive of a largely elite-controlled redistributive economy. In contrast to previous models characterizing this time period as one of factionalism and environmental stress, the data suggest that coastal cultural adaptations produced an era of widespread political and economic stability.

Beyond the Paleolithic prescription: authors' reply to commentary.

We would like to thank Drs. Muskiet and Carrera-Bastos for contributing to the interesting and ongoing debate about the Paleolithic diet. Drs. Muskiet and Carrera-Bastos raise questions about three main aspects of our recent paper: 1) our depiction of the research of proponents of the Paleolithic diet, 2) the extent to which epigenetics is a set of genetic mechanisms, and 3) the role of cultural transmission and social learning in shaping evolutionary pressures and human diets in the pre-agricultural past. Each of these issues is addressed below. Drs. Muskiet and Carrera-Bastos argue that none of the proponents of the Paleolithic diet support a single model claiming that evolution stopped after the agricultural revolution. Yet, a number of researchers quoted in our article, have, in fact, published research pointing toward human bodies as reflecting primarily Paleolithic adaptations in terms of diet.1,2 This research has been highly influential in shaping clinical applications based on evolutionary medicine. While the importance of Neolithic adaptations is acknowledged in more recent work,3 much of the mismatch hypothesis still relies on a Paleolithic default for explaining human eating behavior, to the exclusion of other mechanisms or lines of evidence. The issue here is not …