| 1. |
- Kılınç, Gülşah Merve, et al.
(författare)
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Human population dynamics and Yersinia pestis in ancient northeast Asia
- 2021
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Ingår i: Science Advances. - : American Association for the Advancement of Science (AAAS). - 2375-2548. ; 7:2
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Tidskriftsartikel (refereegranskat)abstract
- We present genome-wide data from 40 individuals dating to c.16,900 to 550 years ago in northeast Asia. We describe hitherto unknown gene flow and admixture events in the region, revealing a complex population history. While populations east of Lake Baikal remained relatively stable from the Mesolithic to the Bronze Age, those from Yakutia and west of Lake Baikal witnessed major population transformations, from the Late Upper Paleolithic to the Neolithic, and during the Bronze Age, respectively. We further locate the Asian ancestors of Paleo-Inuits, using direct genetic evidence. Last, we report the most northeastern ancient occurrence of the plague-related bacterium, Yersinia pestis. Our findings indicate the highly connected and dynamic nature of northeast Asia populations throughout the Holocene.
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| 2. |
- Dalen, Love, et al.
(författare)
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Partial Genetic Turnover in Neandertals : Continuity in the East and Population Replacement in the West
- 2012
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Ingår i: Molecular biology and evolution. - : Oxford University Press (OUP). - 0737-4038 .- 1537-1719. ; 29:8, s. 1893-1897
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Tidskriftsartikel (refereegranskat)abstract
- Remarkably little is known about the population-level processes leading up to the extinction of the neandertal. To examine this, we use mitochondrial DNA sequences from 13 neandertal individuals, including a novel sequence from northern Spain, to examine neandertal demographic history. Our analyses indicate that recent western European neandertals (< 48 kyr) constitute a tightly defined group with low mitochondrial genetic variation in comparison with both eastern and older (> 48 kyr) European neandertals. Using control region sequences, Bayesian demographic simulations provide higher support for a model of population fragmentation followed by separate demographic trajectories in subpopulations over a null model of a single stable population. The most parsimonious explanation for these results is that of a population turnover in western Europe during early Marine Isotope Stage 3, predating the arrival of anatomically modern humans in the region.
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| 3. |
- Lundberg, Stefan, et al.
(författare)
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Stone loach in Stockholm, Sweden, and royal fish-ponds in the seventeenth and eighteenth centuries
- 2010
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Ingår i: Archives of Natural History. - 0260-9541 .- 1755-6260. ; 37:1, s. 150-160
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Tidskriftsartikel (refereegranskat)abstract
- The stone loach (Barbatula barbatula) occurs in three main areas in Sweden. In the north, it is found in Lapland in the River Tornealven. In the south, it is found in Skane. There are also two populations near the cities of Stockholm and Nykoping. New data suggest that these two populations originate from fish that were kept in ponds. In the 1740s King Frederick I is said to have released stone loaches from German sources in Lake Malaren, but this cannot explain its occurrence in Igelbacken near Stockholm. There is also reason to believe that it was kept in ponds at the royal castle Ulriksdal in the mid-eighteenth century. The fish was possibly imported from the king's native Germany, to be eaten as a delicacy. However, historical records tell of pond-keeping of stone loach by the Royal court in the Stockholm area during the 1680s.
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| 4. |
- Skovsted, Christian, 1974-
(författare)
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Associated conchs and opercula of Triplicatella disdoma (Hyolitha) from the early Cambrian of South Australia
- 2013
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Ingår i: Alcheringa. - : Informa UK Limited. - 0311-5518 .- 1752-0754. ; 38:1, s. 148-153
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Tidskriftsartikel (refereegranskat)abstract
- Internal moulds of complete shells, including conch and associated opercula, of the hyolith Triplicatella disdoma from Cambrian Series 2, Stages 3–4 of South Australia are described. The conch of T. disdoma is shown to be narrow and cone-shaped, and with a rounded triangular cross-section. The conch shows a gentle dorsal curvature in lateral view. The fossils lack evidence of helens, and the operculum was smaller than the apertural diameter of the conch and could be withdrawn a short distance into the conch. Triplicatella was probably closely related to orthothecid hyoliths.
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