AlisaVershininaUC Santa CruzPhD Student

1156 High Street EEBiology/CBBSanta CruzCA95064United States

(831) 459 - 3009vershininaalissa@gmail.comhttps://pgl.soe.ucsc.edu/https://orcid.org/0000-0002-3120-6592BethShapiroUC Santa Cruz, HHMIProfessor

1156 High Street EEBiology/CBBSanta CruzCA95064USA

(831) 459 - 3009bashapir@ucsc.uedhttps://pgl.soe.ucsc.edu/https://orcid.org/0000-0002-2733-7776PamelaGrovesInstitute of Arctic Biology, University of Alaska FairbanksResearch Scientist

PO Box 757000FairbanksAK99775-7000United States

pgroves@alaska.eduPamelaGrovesInstitute of Arctic Biology, University of Alaska FairbanksResearch Scientist

PO Box 757000FairbanksAK99775-7000United States

pgroves@alaska.eduprincipalInvestigatorBethShapiroUC Santa Cruz, Howard Hughes Medical InstituteProfessor

1156 High Street EEBiology/CBBSanta CruzCA95064USA

(831) 459 - 3009bashapir@ucsc.uedhttps://pgl.soe.ucsc.edu/https://orcid.org/0000-0002-2733-7776principalInvestigatorDanielMannGeography Program, School of Natural Resources, University of Alaska FairbanksAssistant Professordhmann@alaska.eduprincipalInvestigator2019This data package is associated with the NSF Award # 1417036.Collaborative Research: Land Bridges, Ice-Free Corridors, and Biome Shifts: Impacts on the Evolution and Extinction of Horses in Ice-Age Beringia. This study asks: How important was connectivity among populations of large arctic mammal species for maintaining genetic diversity, influencing evolutionary change, and mitigating extinction risk? What types of barriers affected this connectivity, and how permeable were these barriers to gene flow? This study looks into how caballine horses, that inhabited ice-age Beringia (the biogeographic connector between Asia and North America), were affected by changes involving three different biogeographic barriers/corridors (1. the Bering Strait/Bering Land Bridge, which controlled dispersal and gene flow between Eurasia and Alaska; 2. the Ice-Free Corridor, which controlled gene flow between the Yukon and the Lower 48 States; and 3. biome shifts that periodically disrupted the spatial continuity of the Mammoth-Steppe, the unique ecosystem that stretched from France to the Yukon during the ice ages) during the last 30,000 years of the ice age. The specimens are currently in the Earth Sciences Collection at the University of Alaska Fairbanks Museum and are being curated by Pamela Groves and Daniel H. Mann. Each bone was sub-sampled for ancient DNA extraction, and sub-samples are currently in the collection of Paleogenomics lab UC Santa Cruz, curated by Alisa Vershinina.PleistoceneEquusHorseAlaskaNoneThis work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.Alaska-153.369141-153.36914166.16050766.160507All paleontological samples were identified to genus or species.GenusEquus20152019AlisaVershininaUC Santa CruzPhD Student

1156 High Street EEBiology/CBBSanta CruzCA95064United States

(831) 459 - 3009vershininaalissa@gmail.comhttps://pgl.soe.ucsc.edu/https://orcid.org/0000-0002-3120-6592Field trips to collect paleontological samples.Taxonomic identification.Radiocarbon dating, N and C stable isotope analysis.Stable isotope data were acquired at the UC Irvine KECK AMS facility led by John Southton. Radiocarbon concentrations are given as fractions of the Modern standard, D14C, and conventional radiocarbon age, following the conventions ofStuiver and Polach (Radiocarbon, v. 19, p.355, 1977). Sample preparation backgrounds have been subtracted, based on measurements of 14C-free whale and mammoth bone. All results have been corrected for isotopic fractionation according to the conventions of Stuiver and Polach (1977), with d13C values measured on prepared graphite using the AMS spectrometer. These can differ from d13C of the original material, and are not shown. d13C and d15N values shown were measured to a precision of <0.1‰ and <0.2‰, respectively, on aliquots of ultrafiltered collagen, using a Fisons NA1500NC elemental analyzer/Finnigan Delta Plus isotope ratio mass spectrometer.All samples were collected in Alaska: North Slope, Seward Peninsula, Mainland Alaska (Fairbanks), and Alaska-Canada border.Most of them are dated between 10k years old and 50k years old. Some are older than 50k years.All collected elements are bones, mostly metapodials.No sampling description provided.AlisaVershininaUC Santa CruzPhD StudentprincipalInvestigatorBethShapiroUC Santa Cruz, HHMIProfessorprincipalInvestigatorPamelaGrovesInstitute of Arctic Biology, University of Alaska FairbanksResearch ScientistprincipalInvestigatorNSF Award 1417036 (Collaborative Research: Land Bridges, Ice-Free Corridors, and Biome Shifts: Impacts on the Evolution and Extinction of Horses in Ice-Age Beringia)horses_14C_delC_delN_Pleistocene_Alaska.csvUncalibrated radiocarbon dates, delta C and delta N stable isotope data for horse bones collected in different locations in Alaska.UCSC_PGL_IDID, Paleogenomics labUCSC lab ID numberSC(Santa Cruz)18 (year).AV003 (sample)text/csvdata_package_description_and_details.txtDetails about data collection, people involved with the project, abbreviations.DetailsDetails about the data packageAny text*text/plain