Bone diagenesis study of the burials from the Pedra do Alexandre archaeological site, Carnaúba dos Dantas, RN

Sullasi, Henry Sócrates Lavalle; Santos, André Luiz Campelo dos; Silva, Sergio Francisco Serafim Monteiro da

doi:10.15210/lepaarq.v15i30.12955

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…On the southeastern coast, the genetic similarities ascertained through f 3 outgroup and f 4 statistics revealed three distinct groups at the sambaqui do Limão: (1) the oldest individual (Limão_2700BP), (2) a cluster of four temporally intermediate individuals (Limão_~1900BP) and (3) the most recent individual (Limão_500BP). The Limão_~1900BP group shows the highest genetic affinities to Limão_2700BP and to a possibly early to middle Holocene hunter-gatherer from the northeastern site of Pedra do Alexandre (Pedra Do Alexandre2_undated) 71 (Fig. 2 ).…”

Section: Resultsmentioning

confidence: 99%

Genomic history of coastal societies from eastern South America

Ferraz,

Suarez Villagran,

Nägele

et al. 2023

Nat Ecol Evol

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Sambaqui (shellmound) societies are among the most intriguing archaeological phenomena in pre-colonial South America, extending from approximately 8,000 to 1,000 years before present (yr bp) across 3,000 km on the Atlantic coast. However, little is known about their connection to early Holocene hunter-gatherers, how this may have contributed to different historical pathways and the processes through which late Holocene ceramists came to rule the coast shortly before European contact. To contribute to our understanding of the population history of indigenous societies on the eastern coast of South America, we produced genome-wide data from 34 ancient individuals as early as 10,000 yr bp from four different regions in Brazil. Early Holocene hunter-gatherers were found to lack shared genetic drift among themselves and with later populations from eastern South America, suggesting that they derived from a common radiation and did not contribute substantially to later coastal groups. Our analyses show genetic heterogeneity among contemporaneous Sambaqui groups from the southeastern and southern Brazilian coast, contrary to the similarity expressed in the archaeological record. The complex history of intercultural contact between inland horticulturists and coastal populations becomes genetically evident during the final horizon of Sambaqui societies, from around 2,200 yr bp, corroborating evidence of cultural change.

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Section: Resultsmentioning

confidence: 99%

Genomic history of coastal societies from eastern South America

Ferraz,

Suarez Villagran,

Nägele

et al. 2023

Nat Ecol Evol

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The influence of a standardized experimental environment on early diagenetic changes to animal bone

Lacel¹,

Wojtków

Tomanik

et al. 2021

Geoarchaeology

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We evaluated the dynamics of the diagenetic changes to pig bones incubated for 4, 10, and 31 months in a controlled environment (soil type, moisture and pH, air humidity, and temperature). The criteria for the assessment were as follows: physical parameters (bone weight), biomechanical parameters (compressive strength), bone microstructure (using micro‐computed tomography), and phosphorus and calcium content in the surrounding soil. It was shown that the bone weight decreased the most after 4 months of incubation, whereas the biggest change in the compressive strength was not observed until after 31 months of incubation. Also, the main changes to the bone microstructure were observed in the initial period of degeneration. After 4 months of the experiment, a major drop in the percentage of the thinnest bone trabeculae was noted, whereas a reverse trend was observed for the thickest trabeculae. Moreover, the most significant decrease in the Ca/P ratio in the surrounding soil was observed after the experiment's first 4 months. We conclude that the bioerosion of collagen observed after the initial experimental period was followed by hydroxyapatite chemical decomposition. These results indicate the usefulness of the applied analyses and the feasibility of ensuring a standardized environment for diagenetic research.

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Bone diagenesis study of the burials from the Pedra do Alexandre archaeological site, Carnaúba dos Dantas, RN

Cited by 2 publications

References 23 publications

Genomic history of coastal societies from eastern South America

Genomic history of coastal societies from eastern South America

The influence of a standardized experimental environment on early diagenetic changes to animal bone

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