No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition

The Eocene-Oligocene (E/O) boundary ~33.9 million years ago, has been described as a state change in the Earth system marked by the permanent glaciation of Antarctica and a proposed increase in oceanic productivity. Here we quantified the response of fish production and biodiversity to this event us...

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Main Authors: Sibert, Elizabeth, Zill, Michelle, Frigyik, Ella, Norris, Richard
Format: Other/Unknown Material
Language:unknown
Published: Zenodo 2020
Subjects:
Online Access:https://doi.org/10.5061/dryad.nk98sf7q5
id ftzenodo:oai:zenodo.org:4992386
record_format openpolar
spelling ftzenodo:oai:zenodo.org:4992386 2024-09-15T17:45:25+00:00 No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition Sibert, Elizabeth Zill, Michelle Frigyik, Ella Norris, Richard 2020-03-02 https://doi.org/10.5061/dryad.nk98sf7q5 unknown Zenodo https://doi.org/10.1038/s41561-020-0540-2 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.nk98sf7q5 oai:zenodo.org:4992386 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Eocene-Oligocene fossils microfossils Ichthyoliths pelagic fish info:eu-repo/semantics/other 2020 ftzenodo https://doi.org/10.5061/dryad.nk98sf7q510.1038/s41561-020-0540-2 2024-07-26T03:19:14Z The Eocene-Oligocene (E/O) boundary ~33.9 million years ago, has been described as a state change in the Earth system marked by the permanent glaciation of Antarctica and a proposed increase in oceanic productivity. Here we quantified the response of fish production and biodiversity to this event using microfossil fish teeth (ichthyoliths) in seven deep-sea sediment cores from around the world. Ichthyolith accumulation rate (a proxy for fish biomass production) shows no synchronous trends across the E/O. Ichthyolith accumulation in the Southern Ocean and Pacific Gyre sites is an order of magnitude lower than the equatorial and Atlantic sites, demonstrating that the Southern Ocean was not a highly productive ecosystem for fish before or after the E/O. Further, tooth morphotype diversity and assemblage composition remained stable across the interval, indicating little change in the biodiversity or ecological role of open ocean fish. While the E/O boundary was a major global climate change event, its impact on pelagic fish was relatively muted. Our results support recent findings of whale and krill diversification which suggest that the pelagic ecosystem restructuring commonly attributed to the E/O transition likely occurred much later, in the late Oligocene or Miocene. README for Data Archive for: Pelagic fish production and diversity unchanging across the Eocene-Oligocene Glaciation Elizabeth C Sibert, Michelle E Zill, Ella T. Frigyik, and Richard D Norris Contact: Elizabeth Sibert (esibert@fas.harvard.edu) *Email address will be updated at a future time This dataset consists of images of each unique ocean drilling sample considered in this study. There are two sites included in this study: DSDP Site 596 and ODP Site 689. They were imaged at different times and on different instruments, however the data are functionally equivilant. File Name information: ODP Site 689: Filenames take the form: SiteNumber_SlideNumber_SampleNumber_IODP-Core_IODP-Section_IODP-SampleDepthInterval_HoleNumber_ZoomLevel ODP-689B ANT01 ... Other/Unknown Material Antarc* Antarctica Southern Ocean Zenodo
institution Open Polar
collection Zenodo
op_collection_id ftzenodo
language unknown
topic Eocene-Oligocene
fossils
microfossils
Ichthyoliths
pelagic fish
spellingShingle Eocene-Oligocene
fossils
microfossils
Ichthyoliths
pelagic fish
Sibert, Elizabeth
Zill, Michelle
Frigyik, Ella
Norris, Richard
No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition
topic_facet Eocene-Oligocene
fossils
microfossils
Ichthyoliths
pelagic fish
description The Eocene-Oligocene (E/O) boundary ~33.9 million years ago, has been described as a state change in the Earth system marked by the permanent glaciation of Antarctica and a proposed increase in oceanic productivity. Here we quantified the response of fish production and biodiversity to this event using microfossil fish teeth (ichthyoliths) in seven deep-sea sediment cores from around the world. Ichthyolith accumulation rate (a proxy for fish biomass production) shows no synchronous trends across the E/O. Ichthyolith accumulation in the Southern Ocean and Pacific Gyre sites is an order of magnitude lower than the equatorial and Atlantic sites, demonstrating that the Southern Ocean was not a highly productive ecosystem for fish before or after the E/O. Further, tooth morphotype diversity and assemblage composition remained stable across the interval, indicating little change in the biodiversity or ecological role of open ocean fish. While the E/O boundary was a major global climate change event, its impact on pelagic fish was relatively muted. Our results support recent findings of whale and krill diversification which suggest that the pelagic ecosystem restructuring commonly attributed to the E/O transition likely occurred much later, in the late Oligocene or Miocene. README for Data Archive for: Pelagic fish production and diversity unchanging across the Eocene-Oligocene Glaciation Elizabeth C Sibert, Michelle E Zill, Ella T. Frigyik, and Richard D Norris Contact: Elizabeth Sibert (esibert@fas.harvard.edu) *Email address will be updated at a future time This dataset consists of images of each unique ocean drilling sample considered in this study. There are two sites included in this study: DSDP Site 596 and ODP Site 689. They were imaged at different times and on different instruments, however the data are functionally equivilant. File Name information: ODP Site 689: Filenames take the form: SiteNumber_SlideNumber_SampleNumber_IODP-Core_IODP-Section_IODP-SampleDepthInterval_HoleNumber_ZoomLevel ODP-689B ANT01 ...
format Other/Unknown Material
author Sibert, Elizabeth
Zill, Michelle
Frigyik, Ella
Norris, Richard
author_facet Sibert, Elizabeth
Zill, Michelle
Frigyik, Ella
Norris, Richard
author_sort Sibert, Elizabeth
title No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition
title_short No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition
title_full No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition
title_fullStr No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition
title_full_unstemmed No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition
title_sort no state change in pelagic fish production and biodiversity during the eocene-oligocene transition
publisher Zenodo
publishDate 2020
url https://doi.org/10.5061/dryad.nk98sf7q5
genre Antarc*
Antarctica
Southern Ocean
genre_facet Antarc*
Antarctica
Southern Ocean
op_relation https://doi.org/10.1038/s41561-020-0540-2
https://zenodo.org/communities/dryad
https://doi.org/10.5061/dryad.nk98sf7q5
oai:zenodo.org:4992386
op_rights info:eu-repo/semantics/openAccess
Creative Commons Zero v1.0 Universal
https://creativecommons.org/publicdomain/zero/1.0/legalcode
op_doi https://doi.org/10.5061/dryad.nk98sf7q510.1038/s41561-020-0540-2
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