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description Publicationkeyboard_double_arrow_right Article , Journal 2014 United StatesPublisher:Proceedings of the National Academy of Sciences Zazula, Grant D; MacPhee, Ross DE; Metcalfe, Jessica Z; Reyes, Alberto V; Brock, Fiona; Druckenmiller, Patrick S; Groves, Pamela; Harington, C Richard; Hodgins, Gregory WL; Kunz, Michael L; Longstaffe, Fred J; Mann, Daniel H; McDonald, H Gregory; Nalawade-Chavan, Shweta; Southon, John R;SignificanceNew radiocarbon (14C) dates on American mastodon (Mammut americanum) fossils in Alaska and Yukon suggest this species suffered local extirpation before terminal Pleistocene climate changes or human colonization. Mastodons occupied high latitudes during the Last Interglacial (∼125,000–75,000 y ago) when forests were established. Ecological changes during the Wisconsinan glaciation (∼75,000 y ago) led to habitat loss and population collapse. Thereafter, mastodons were limited to areas south of the continental ice sheets, where they ultimately died out ∼10,00014C years B.P. Extirpation of mastodons and some other megafaunal species in high latitudes was thus independent of their later extinction south of the ice. Rigorous pretreatment was crucial to removing contamination from fossils that originally yielded erroneously “young”14C dates.
University of Califo... arrow_drop_down University of California: eScholarshipArticle . 2014Full-Text: https://escholarship.org/uc/item/30t048pzData sources: Bielefeld Academic Search Engine (BASE)Proceedings of the National Academy of SciencesArticle . 2014 . Peer-reviewedData sources: CrossrefeScholarship - University of CaliforniaArticle . 2014Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1416072111&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 45 citations 45 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert University of Califo... arrow_drop_down University of California: eScholarshipArticle . 2014Full-Text: https://escholarship.org/uc/item/30t048pzData sources: Bielefeld Academic Search Engine (BASE)Proceedings of the National Academy of SciencesArticle . 2014 . Peer-reviewedData sources: CrossrefeScholarship - University of CaliforniaArticle . 2014Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1416072111&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu
description Publicationkeyboard_double_arrow_right Article , Journal 2014 United StatesPublisher:Proceedings of the National Academy of Sciences Zazula, Grant D; MacPhee, Ross DE; Metcalfe, Jessica Z; Reyes, Alberto V; Brock, Fiona; Druckenmiller, Patrick S; Groves, Pamela; Harington, C Richard; Hodgins, Gregory WL; Kunz, Michael L; Longstaffe, Fred J; Mann, Daniel H; McDonald, H Gregory; Nalawade-Chavan, Shweta; Southon, John R;SignificanceNew radiocarbon (14C) dates on American mastodon (Mammut americanum) fossils in Alaska and Yukon suggest this species suffered local extirpation before terminal Pleistocene climate changes or human colonization. Mastodons occupied high latitudes during the Last Interglacial (∼125,000–75,000 y ago) when forests were established. Ecological changes during the Wisconsinan glaciation (∼75,000 y ago) led to habitat loss and population collapse. Thereafter, mastodons were limited to areas south of the continental ice sheets, where they ultimately died out ∼10,00014C years B.P. Extirpation of mastodons and some other megafaunal species in high latitudes was thus independent of their later extinction south of the ice. Rigorous pretreatment was crucial to removing contamination from fossils that originally yielded erroneously “young”14C dates.
University of Califo... arrow_drop_down University of California: eScholarshipArticle . 2014Full-Text: https://escholarship.org/uc/item/30t048pzData sources: Bielefeld Academic Search Engine (BASE)Proceedings of the National Academy of SciencesArticle . 2014 . Peer-reviewedData sources: CrossrefeScholarship - University of CaliforniaArticle . 2014Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1416072111&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen bronze 45 citations 45 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert University of Califo... arrow_drop_down University of California: eScholarshipArticle . 2014Full-Text: https://escholarship.org/uc/item/30t048pzData sources: Bielefeld Academic Search Engine (BASE)Proceedings of the National Academy of SciencesArticle . 2014 . Peer-reviewedData sources: CrossrefeScholarship - University of CaliforniaArticle . 2014Data sources: eScholarship - University of Californiaadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1073/pnas.1416072111&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu