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Paul Szpak
Trent University
38Publications
15H-index
822Citations
Publications 38
Newest
Published on Dec 1, 2019in Scientific Reports4.01
Mikkel Skovrind2
Estimated H-index: 2
(Wild Center),
José Alfredo Samaniego Castruita4
Estimated H-index: 4
(Wild Center)
+ 6 AuthorsEline D. Lorenzen18
Estimated H-index: 18
(Wild Center)
In 1990, a skull from a morphologically unusual Monodontid was found in West Greenland and collected for the Natural History Museum of Denmark, University of Copenhagen. From its intermediate morphology, the skull was hypothesized to be a beluga/narwhal hybrid. If confirmed, the specimen would, to our knowledge, represent the sole evidence of hybridization between the only two toothed whale species endemic to the Arctic. Here we present genome-wide DNA sequence data from the specimen and investi...
Published on Mar 14, 2019in Scientific Reports4.01
Alba Rey-Iglesia2
Estimated H-index: 2
(Wild Center),
Ana García-Vázquez + 6 AuthorsEline D. Lorenzen18
Estimated H-index: 18
(Wild Center)
Over 60% of the modern distribution range of brown bears falls within Russia, yet palaeoecological data from the region remain scarce. Complete modern Russian brown bear mitogenomes are abundant in the published literature, yet examples of their ancient counterparts are absent. Similarly, there is only limited stable isotopic data of prehistoric brown bears from the region. We used ancient DNA and stable carbon (δ13C) and nitrogen (δ15N) isotopes retrieved from five Pleistocene Yakutian brown be...
Published on Jun 6, 2019in Current Biology9.19
Frédéric Delsuc38
Estimated H-index: 38
(University of Montpellier),
Melanie Kuch18
Estimated H-index: 18
(McMaster University)
+ 10 AuthorsRoss D. E. MacPhee25
Estimated H-index: 25
(AMNH: American Museum of Natural History)
Summary Living sloths represent two distinct lineages of small-sized mammals that independently evolved arboreality from terrestrial ancestors. The six extant species are the survivors of an evolutionary radiation marked by the extinction of large terrestrial forms at the end of the Quaternary. Until now, sloth evolutionary history has mainly been reconstructed from phylogenetic analyses of morphological characters. Here, we used ancient DNA methods to successfully sequence 10 extinct sloth mito...
Published on Jun 1, 2019in Archaeological and Anthropological Sciences1.98
Paul Szpak15
Estimated H-index: 15
(Trent University),
Fred J. Longstaffe41
Estimated H-index: 41
(UWO: University of Western Ontario)
+ 3 AuthorsMichael P. Richards4
Estimated H-index: 4
(SFU: Simon Fraser University)
This study presents sulfur isotope compositions (δ34S) for plants grown in a series of growth chamber and field experiments under controlled conditions. Maize, beans, and squash fertilized with a marine fertilizer (seabird guano) were significantly enriched in 34S relative to the unfertilized control plants (by +4.0 to +7.2‰) in the growth chamber experiments. No 34S enrichment was detected in the plants from the field experiment, which likely relates to the recent use of ammonium sulfate fertil...
Published on May 1, 2019in Quaternary Science Reviews4.64
Paul Szpak15
Estimated H-index: 15
(Trent University),
James M. Savelle18
Estimated H-index: 18
(McGill University)
+ 1 AuthorsMichael P. Richards4
Estimated H-index: 4
(SFU: Simon Fraser University)
Abstract Environmental change in the Arctic has been a primary topic of interest in recent years, particularly as it relates to the consequences of anthropogenic climate change. Sea ice is of particular importance in this context, both in terms of the effects of climate change in the Arctic, but also globally. Most studies examining the responses of various components of the biosphere to warming temperatures necessarily have a short temporal perspective. The purpose of this study was to use stab...
Published on Feb 22, 2019in Environmental Archaeology1.32
Paul Szpak15
Estimated H-index: 15
(Trent University),
Jean-François Millaire10
Estimated H-index: 10
(UWO: University of Western Ontario)
+ 2 AuthorsFred J. Longstaffe41
Estimated H-index: 41
(UWO: University of Western Ontario)
ABSTRACTStable carbon and nitrogen isotope compositions were determined for camelid bone collagen, hair, and wool (fibre) sampled from textiles from archaeological sites in the Santa Valley (north coast of Peru) occupied during Moche III (El Castillo, A.D. 300−500) and Moche IV (Guadalupito, A.D. 500−700) phases; a small number of camelid bone collagen samples were also analysed from the Late Suchimancillo Phase (A.D. 0−300). These data suggest that localised camelid husbandry was practiced in t...
Published on Feb 1, 2019in Radiocarbon1.53
Arthur S. Dyke31
Estimated H-index: 31
,
James M. Savelle18
Estimated H-index: 18
+ 4 AuthorsKathryn Kotar1
Estimated H-index: 1
Published on Oct 22, 2018
Joseph M. Craine45
Estimated H-index: 45
,
Andrew J. Elmore21
Estimated H-index: 21
+ 35 AuthorsAlex Fajardo21
Estimated H-index: 21
Published on Jun 1, 2018in Archaeometry1.64
Paul Szpak15
Estimated H-index: 15
(Trent University),
Jean-François Millaire10
Estimated H-index: 10
(UWO: University of Western Ontario)
+ 2 AuthorsFred J. Longstaffe41
Estimated H-index: 41
(UWO: University of Western Ontario)
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