Oxygenation of the Baltoscandian shelf linked to Ordovician biodiversification
(2023) In Nature Geoscience 16(11). p.1047-1053- Abstract
Marine biodiversity increased markedly during the Ordovician Period (~487–443 million years ago). Some intervals within the Ordovician were associated with unusually rapid and prominent rises in taxonomic richness, the reasons for which remain debated. Links between increased oxygenation and biodiversification have been proposed, although supporting marine oxygen proxy data are limited. Here we present an expansive multi-site iodine-to-calcium (I/Ca) record from Lower–Middle Ordovician marine carbonates in Baltoscandia that provides a detailed account of the spatio-temporal development of oxygen conditions across this palaeoshelf. The data document progressive oxygenation of regional seafloor environments, with well-oxygenated waters... (More)
Marine biodiversity increased markedly during the Ordovician Period (~487–443 million years ago). Some intervals within the Ordovician were associated with unusually rapid and prominent rises in taxonomic richness, the reasons for which remain debated. Links between increased oxygenation and biodiversification have been proposed, although supporting marine oxygen proxy data are limited. Here we present an expansive multi-site iodine-to-calcium (I/Ca) record from Lower–Middle Ordovician marine carbonates in Baltoscandia that provides a detailed account of the spatio-temporal development of oxygen conditions across this palaeoshelf. The data document progressive oxygenation of regional seafloor environments, with well-oxygenated waters sourced from the palaeoequatorward Iapetus Ocean and peak I/Ca values (that is, dissolved oxygen concentrations) coinciding with the most pronounced biodiversity increases and ecosystem reorganizations during this time interval. This occurred while the climate cooled, global sea level dropped and carbonate deposits became regionally dominant. The results suggest that ventilation of shelves played a critical role in regulating early Palaeozoic marine biodiversity via development of ecospace and aerobic–metabolic conditions.
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- author
- Lindskog, Anders LU ; Young, Seth A. ; Bowman, Chelsie N. ; Kozik, Nevin P. ; Newby, Sean M. ; Eriksson, Mats E. LU ; Pettersson, Johan LU ; Molin, Emmy and Owens, Jeremy D.
- organization
- publishing date
- 2023-11
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Geoscience
- volume
- 16
- issue
- 11
- pages
- 7 pages
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85173992368
- ISSN
- 1752-0894
- DOI
- 10.1038/s41561-023-01287-z
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2023, The Author(s).
- id
- ec737958-274d-49b0-a3b3-878f6acd2041
- date added to LUP
- 2023-12-20 15:47:51
- date last changed
- 2023-12-20 15:49:01
@article{ec737958-274d-49b0-a3b3-878f6acd2041,
abstract = {{<p>Marine biodiversity increased markedly during the Ordovician Period (~487–443 million years ago). Some intervals within the Ordovician were associated with unusually rapid and prominent rises in taxonomic richness, the reasons for which remain debated. Links between increased oxygenation and biodiversification have been proposed, although supporting marine oxygen proxy data are limited. Here we present an expansive multi-site iodine-to-calcium (I/Ca) record from Lower–Middle Ordovician marine carbonates in Baltoscandia that provides a detailed account of the spatio-temporal development of oxygen conditions across this palaeoshelf. The data document progressive oxygenation of regional seafloor environments, with well-oxygenated waters sourced from the palaeoequatorward Iapetus Ocean and peak I/Ca values (that is, dissolved oxygen concentrations) coinciding with the most pronounced biodiversity increases and ecosystem reorganizations during this time interval. This occurred while the climate cooled, global sea level dropped and carbonate deposits became regionally dominant. The results suggest that ventilation of shelves played a critical role in regulating early Palaeozoic marine biodiversity via development of ecospace and aerobic–metabolic conditions.</p>}},
author = {{Lindskog, Anders and Young, Seth A. and Bowman, Chelsie N. and Kozik, Nevin P. and Newby, Sean M. and Eriksson, Mats E. and Pettersson, Johan and Molin, Emmy and Owens, Jeremy D.}},
issn = {{1752-0894}},
language = {{eng}},
number = {{11}},
pages = {{1047--1053}},
publisher = {{Nature Publishing Group}},
series = {{Nature Geoscience}},
title = {{Oxygenation of the Baltoscandian shelf linked to Ordovician biodiversification}},
url = {{http://dx.doi.org/10.1038/s41561-023-01287-z}},
doi = {{10.1038/s41561-023-01287-z}},
volume = {{16}},
year = {{2023}},
}