Continuity and Change in the Eastern Aleutian Archaeological Sequence

Davis, Richard S.; Knecht, Rick

doi:10.3378/027.082.0503

Cited by 16 publications

(2 citation statements)

References 18 publications

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“…On the basis of archaeological evidence and mtDNA data from ancient and modern samples, the Aleutian Islands are hypothesized to have been peopled as early as ca. 9 KYA by ‘Paleo-Aleuts’ who were succeeded by the ‘Neo-Aleuts’, with present-day Aleutian Islanders potentially resulting from admixture between these two populations (52, 53). Perhaps their complex genetic history included input from a population related to Australo-Melanesians through an East Asian continental route, and this genomic signal might have been subsequently transferred to parts of the Americas, including South America, through past gene flow events (Fig.…”

Section: Evidence Of More Distant Old World Gene Flow Into Some Nativmentioning

confidence: 99%

Genomic evidence for the Pleistocene and recent population history of Native Americans

Raghavan

Steinrücken

Harris

et al. 2015

Science

479

500

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How and when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we find that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia no earlier than 23 thousand years ago (KYA), and after no more than 8,000-year isolation period in Beringia. Following their arrival to the Americas, ancestral Native Americans diversified into two basal genetic branches around 13 KYA, one that is now dispersed across North and South America and the other is restricted to North America. Subsequent gene flow resulted in some Native Americans sharing ancestry with present-day East Asians (including Siberians) and, more distantly, Australo-Melanesians. Putative ‘Paleoamerican’ relict populations, including the historical Mexican Pericúes and South American Fuego-Patagonians, are not directly related to modern Australo-Melanesians as suggested by the Paleoamerican Model.

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Section: Evidence Of More Distant Old World Gene Flow Into Some Nativmentioning

confidence: 99%

Genomic evidence for the Pleistocene and recent population history of Native Americans

Raghavan

Steinrücken

Harris

et al. 2015

Science

479

500

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“…In turn, the activity of birds (active guano deposition) influenced the chemical composition of soil and water, and the structure of islands' flora [8,[25][26][27][28]. Since the beginning of the Early Holocene, the Aleutian Islands began to be colonized by ancient Aleuts, whose activities influenced the local flora and fauna, but not so crucially as people colonization in Europe [29]. Humans colonized different islands at different times from the East, and the seabirds were among their main prey [10,22,30].…”

Section: Introductionmentioning

confidence: 99%

The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes

Neplyukhina

Tchabovsky

Gololobova

et al. 2021

Water

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A diatom analysis of a peat deposit from Shemya Island (Aleutian Arc, USA) is performed, and the dynamics of the diatom community are described. According to the radiocarbon dating, the formation of the deposit began 9300 cal. years BP. Principal component analysis made it possible to relate the dynamics of the diatom community to certain environmental conditions and the factors that influenced the coastal ecosystems during its formation. The following factors (predictors) were considered: the influence of age, zoo- and anthropogenic effects, and changes in climatic conditions. Sea level change was the main driver of the diatom community in the studied water body having a continuous direct and indirect influence on the studied small water body, i.e., by bird colony formation and more humid and coastal conditions. Since 3000–2000 cal. years BP, the anthropogenic factor (hunting depression of the bird colony) also became significant. During the whole water body lifetime and following peat formation, the diatom community was influenced by groups of factors: global factors (e.g., sea level rise) caused gradual change of local factors, which resulted in smooth shifts in community. In contrast, local factor influence (bird colony rise and fall due to human activity) caused abrupt and transient shifts. We can hypothesize that the relatively stable global environmental conditions in the Late Holocene were an auspicious background to see abrupt changes due to influence of the zoogenic and anthropogenic factors. We believe that further works on the material from other islands will make it possible to form a general picture of changes in the diatom communities in the Holocene and interpret it in connection with climatic changes in the region.

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2019

A Companion to Anthropological Genetics

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Continuity and Change in the Eastern Aleutian Archaeological Sequence

Cited by 16 publications

References 18 publications

Genomic evidence for the Pleistocene and recent population history of Native Americans

Genomic evidence for the Pleistocene and recent population history of Native Americans

The Holocene History of the Diatom Community in a Small Water Body on Shemya Island (Aleutian Arc, USA): The Influence of Global and Local Environmental Changes

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