Subseasonal variations in marine reservoir age from pre-bomb Donax obesulus and Protothaca asperrima shell carbonate

Etayo-Cadavid, Miguel F.; Andrus, C. Fred T.; Jones, Kathleen W.; Hodgins, Gregory W. L.

doi:10.1016/j.chemgeo.2018.07.001

Cited by 9 publications

(5 citation statements)

References 31 publications

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“…Therefore, dates were calibrated using a mixture of SHCal13 ( 63 ) and the Marine13 calibration curves ( 64 ) based on estimates ranging from 20 to 40 (±10)% marine dietary component, depending on the δ 15 N values ( Dataset S1 ). Marine reservoir correction was performed using a ΔR value of 110 ± 49, derived from the most proximate marine reservoir study conducted in Paracas, Peru ( 65 ).…”

Section: Methodsmentioning

confidence: 99%

Integration of ancient DNA with transdisciplinary dataset finds strong support for Inca resettlement in the south Peruvian coast

Bongers

Nakatsuka

O’Shea

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Ancient DNA (aDNA) analysis provides a powerful means of investigating human migration, social organization, and a plethora of other crucial questions about humanity’s past. Recently, specialists have suggested that the ideal research design involving aDNA would include multiple independent lines of evidence. In this paper, we adopt a transdisciplinary approach integrating aDNA with archaeological, biogeochemical, and historical data to investigate six individuals found in two cemeteries that date to the Late Horizon (1400 to 1532 CE) and Colonial (1532 to 1825 CE) periods in the Chincha Valley of southern Peru. Genomic analyses indicate that these individuals are genetically most similar to ancient and present-day populations from the north Peruvian coast located several hundred kilometers away. These genomic data are consistent with 16th century written records as well as ceramic, textile, and isotopic data. These results provide some of the strongest evidence yet of state-sponsored resettlement in the pre-Colonial Andes. This study highlights the power of transdisciplinary research designs when using aDNA data and sets a methodological standard for investigating ancient mobility in complex societies.

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Section: Methodsmentioning

confidence: 99%

Integration of ancient DNA with transdisciplinary dataset finds strong support for Inca resettlement in the south Peruvian coast

Bongers

Nakatsuka

O’Shea

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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“…Marine reservoir corrections (ΔR), which are often based on reservoir ages of marine shells, can be integrated into radiocarbon calibration to produce more accurate dates. Although available ΔR values for the Pacific coast can vary greatly (Taylor & Berger 1967; Jones et al 2007) and are undoubtedly affected by diachronic variability due to coastal upwelling (Latorre et al 2017), Etayo-Cadavid et al (2019) have found no statistically significant difference in the reservoir ages of Donax obesulus and Protothaca asperrima shells collected in northern and central Peru. Their ΔR value for the Paracas area (110±49, calculated according to the Marine13 calibration curve) is derived from an average of 30 dates made on two modern (pre-bomb) shells, and provides the most proximate and best available estimate of ΔR for the Chincha Valley.…”

Section: Methodsmentioning

confidence: 99%

Assembling the dead: human vertebrae-on-posts in the Chincha Valley, Peru

et al. 2022

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The post-mortem manipulation of human bodies is documented in many regions of the world, including South America. Recent archaeological fieldwork in the Chincha Valley, Peru, adds to this catalogue nearly 200 examples of the threading of human vertebrae onto reed posts. Here, the authors report on the distribution and composition of these ‘vertebrae-on-posts’, which are radiocarbon-dated to the Late Horizon (AD 1400–1532) and Colonial (AD 1532–1825) periods. The authors argue that these modified remains represent a social process that reconstructed the dead in response to Colonial-period looting. This manipulation of human remains reflects protracted relationships between the living and the dead, and the enduring social lives of human remains.

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“…Archaeological shells can also be used to study intra-and inter-shell variability in radiocarbon signals that affect calibrations and SST reconstructions (Dusseault 2021). In conjunction with oxygen isotope analysis, radiocarbon dates can also be used to study variation in coastal upwelling (Monge and Alveirinho 2006;Ferguson et al 2013;Etayo-Cadavid et al 2019) or to calculate a geographically localized marine reservoir correction (ΔR) necessary for calibrating marine radiocarbon dates (Betts 2019;Heaton et al 2020). Combining the season of death with an approximate age of harvested bivalves further permits long-term interpretation of the frequency, intensity, and season of shellfish harvesting and thus insight into cultural practices (Burchell et al 2014;Ambrose et al 2016;Betts et al 2017).…”

Section: Mollusk Archivesmentioning

confidence: 99%

Long-term ocean and resource dynamics in a hotspot of climate change

Lotze

Mellon

Coyne

et al. 2022

FACETS

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The abundance, distribution, and size of marine species are linked to temperature and nutrient regimes and are profoundly affected by humans through exploitation and climate change. Yet little is known about long-term historical links between ocean environmental changes and resource abundance to provide context for current and potential future trends and inform conservation and management. We synthesize >4000 years of climate and marine ecosystem dynamics in a Northwest Atlantic region currently undergoing rapid changes, the Gulf of Maine and Scotian Shelf. This period spans the late Holocene cooling and recent warming and includes both Indigenous and European influence. We compare environmental records from instrumental, sedimentary, coral, and mollusk archives with ecological records from fossils, archaeological, historical, and modern data, and integrate future model projections of environmental and ecosystem changes. This multidisciplinary synthesis provides insight into multiple reference points and shifting baselines of environmental and ecosystem conditions, and projects a near-future departure from natural climate variability in 2028 for the Scotian Shelf and 2034 for the Gulf of Maine. Our work helps advancing integrative end-to-end modeling to improve the predictive capacity of ecosystem forecasts with climate change. Our results can be used to adjust marine conservation strategies and network planning and adapt ecosystem-based management with climate change.

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Subseasonal variations in marine reservoir age from pre-bomb Donax obesulus and Protothaca asperrima shell carbonate

Cited by 9 publications

References 31 publications

Integration of ancient DNA with transdisciplinary dataset finds strong support for Inca resettlement in the south Peruvian coast

Integration of ancient DNA with transdisciplinary dataset finds strong support for Inca resettlement in the south Peruvian coast

Assembling the dead: human vertebrae-on-posts in the Chincha Valley, Peru

Long-term ocean and resource dynamics in a hotspot of climate change

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