Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores
One major challenge in the study of late-Quaternary extinctions (LQEs) is providing better estimates of past megafauna abundance. To show how megaherbivore population size varied before and after the last extinctions in interior Alaska, we use both a database of radiocarbon-dated bone remains (spann...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10101202 2023-12-24T10:25:36+01:00 Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores Conroy, KJ Baker, AG Jones, VJ van Hardenbroek, M Hopla, EJ Collier, R Lister, AM Edwards, ME 2020-09 text https://discovery.ucl.ac.uk/id/eprint/10101202/1/Jones_Rev3_MS%20with%20changes%20trackedTER_without_track.pdf https://discovery.ucl.ac.uk/id/eprint/10101202/ eng eng Cambridge University Press (CUP) https://discovery.ucl.ac.uk/id/eprint/10101202/1/Jones_Rev3_MS%20with%20changes%20trackedTER_without_track.pdf https://discovery.ucl.ac.uk/id/eprint/10101202/ open Quaternary Research , 97 pp. 99-110. (2020) Beringia Paleoecology Megafauna Herbivore Sporormiella Sordaria Coprophilous fungal spores Fossil Last glacial maximum Transition Article 2020 ftucl 2023-11-27T13:07:29Z One major challenge in the study of late-Quaternary extinctions (LQEs) is providing better estimates of past megafauna abundance. To show how megaherbivore population size varied before and after the last extinctions in interior Alaska, we use both a database of radiocarbon-dated bone remains (spanning 25–0 ka) and spores of the obligate dung fungus, Sporormiella, recovered from radiocarbon-dated lake-sediment cores (spanning 17–0 ka). Bone fossils show that the last stage of LQEs in the region occurred at about 13 ka ago, but the number of megaherbivore bones remains high into the Holocene. Sporormiella abundance also remains high into the Holocene and does not decrease with major vegetation changes recorded by arboreal pollen percentages. At two sites, the interpretation of Sporormiella was enhanced by additional dung fungal spore types (e.g., Sordaria). In contrast to many sites where the last stage of LQEs is marked by a sharp decline in Sporormiella abundance, in interior Alaska our results indicate the continuance of megaherbivore abundance, albeit with a major taxonomic turnover (including Mammuthus and Equus extinction) from predominantly grazing to browsing dietary guilds. This new and robust evidence implies that regional LQEs were not systematically associated with crashes of overall megaherbivore abundance. Article in Journal/Newspaper Alaska Beringia University College London: UCL Discovery |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Beringia Paleoecology Megafauna Herbivore Sporormiella Sordaria Coprophilous fungal spores Fossil Last glacial maximum Transition |
spellingShingle |
Beringia Paleoecology Megafauna Herbivore Sporormiella Sordaria Coprophilous fungal spores Fossil Last glacial maximum Transition Conroy, KJ Baker, AG Jones, VJ van Hardenbroek, M Hopla, EJ Collier, R Lister, AM Edwards, ME Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores |
topic_facet |
Beringia Paleoecology Megafauna Herbivore Sporormiella Sordaria Coprophilous fungal spores Fossil Last glacial maximum Transition |
description |
One major challenge in the study of late-Quaternary extinctions (LQEs) is providing better estimates of past megafauna abundance. To show how megaherbivore population size varied before and after the last extinctions in interior Alaska, we use both a database of radiocarbon-dated bone remains (spanning 25–0 ka) and spores of the obligate dung fungus, Sporormiella, recovered from radiocarbon-dated lake-sediment cores (spanning 17–0 ka). Bone fossils show that the last stage of LQEs in the region occurred at about 13 ka ago, but the number of megaherbivore bones remains high into the Holocene. Sporormiella abundance also remains high into the Holocene and does not decrease with major vegetation changes recorded by arboreal pollen percentages. At two sites, the interpretation of Sporormiella was enhanced by additional dung fungal spore types (e.g., Sordaria). In contrast to many sites where the last stage of LQEs is marked by a sharp decline in Sporormiella abundance, in interior Alaska our results indicate the continuance of megaherbivore abundance, albeit with a major taxonomic turnover (including Mammuthus and Equus extinction) from predominantly grazing to browsing dietary guilds. This new and robust evidence implies that regional LQEs were not systematically associated with crashes of overall megaherbivore abundance. |
format |
Article in Journal/Newspaper |
author |
Conroy, KJ Baker, AG Jones, VJ van Hardenbroek, M Hopla, EJ Collier, R Lister, AM Edwards, ME |
author_facet |
Conroy, KJ Baker, AG Jones, VJ van Hardenbroek, M Hopla, EJ Collier, R Lister, AM Edwards, ME |
author_sort |
Conroy, KJ |
title |
Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores |
title_short |
Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores |
title_full |
Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores |
title_fullStr |
Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores |
title_full_unstemmed |
Tracking late-Quaternary extinctions in interior Alaska using megaherbivore bone remains and dung fungal spores |
title_sort |
tracking late-quaternary extinctions in interior alaska using megaherbivore bone remains and dung fungal spores |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
https://discovery.ucl.ac.uk/id/eprint/10101202/1/Jones_Rev3_MS%20with%20changes%20trackedTER_without_track.pdf https://discovery.ucl.ac.uk/id/eprint/10101202/ |
genre |
Alaska Beringia |
genre_facet |
Alaska Beringia |
op_source |
Quaternary Research , 97 pp. 99-110. (2020) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10101202/1/Jones_Rev3_MS%20with%20changes%20trackedTER_without_track.pdf https://discovery.ucl.ac.uk/id/eprint/10101202/ |
op_rights |
open |
_version_ |
1786201565021863936 |