Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene
The abundance and composition of modern phytoplankton are primarily related to equator‐to‐pole temperature gradients and global ocean circulation, which in turn determine the availability of nutrients in the photic zone. The nutricline is found at greater depths in warm, tropical waters, whereas mor...
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Uppsala universitet, Paleobiologi
2020
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ftuppsalauniv:oai:DiVA.org:uu-417607 2023-11-12T04:08:39+01:00 Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene Henderiks, Jorijntje Bartol, Milos Pige, Nicolas Karatsolis, Boris-Theofanis Lougheed, Bryan C. 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-417607 https://doi.org/10.1029/2020PA003915 eng eng Uppsala universitet, Paleobiologi Uppsala universitet, Institutionen för geovetenskaper Laboratory of Geology of Lyon: Earth, Planets and Environments (LGLTPE), Université Claude Bernard Lyon 1, ENS de Lyon, CNRS, Villeurbanne, France American Geophysical Union (AGU) Paleoceanography and Paleoclimatology, 2572-4517, 2020, 35:8, orcid:0000-0001-9486-6275 orcid:0000-0002-7475-2921 orcid:0000-0002-6248-2151 orcid:0000-0002-1687-2896 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-417607 doi:10.1029/2020PA003915 ISI:000567508700002 info:eu-repo/semantics/openAccess Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Article in journal info:eu-repo/semantics/article text 2020 ftuppsalauniv https://doi.org/10.1029/2020PA003915 2023-11-01T23:32:12Z The abundance and composition of modern phytoplankton are primarily related to equator‐to‐pole temperature gradients and global ocean circulation, which in turn determine the availability of nutrients in the photic zone. The nutricline is found at greater depths in warm, tropical waters, whereas more vigorous surface mixing in higher latitudes (seasonally) enhances nutrient availability and primary productivity. Ocean temperatures were ~7°C higher during the middle Miocene Climatic Optimum (MCO; ~16.9–14.7 million years ago, Ma), which was followed by Antarctic glaciation and global cooling during the middle Miocene Climate transition (MMCT; 14.7–13.8 Ma). Four decades ago, Haq (1980, https://doi.org.10.2307/1485353) already related migration patterns of low‐latitude versus high‐latitude calcareous nannoplankton in the Atlantic Ocean to major climatic fluctuations during the Miocene. Here, we detail and discuss the macroevolutionary patterns and processes across the middle Miocene (~16.5–11 Ma) at five deep sea sites on a north‐south transect in the Atlantic Ocean (57°N to 28°S). We show that the major cooling step toward the modern “icehouse” world impacted coccolithophore communities at all latitudes. Contrary to previous observations suggesting that tropical sites showed little change and that midlatitudes were the most sensitive recorders of climate change across the MMCT, we show that all sites recorded a marked diversification and increase in abundance of reticulofenestrids. Global cooling and related increased meridional overturning circulation are implicated as likely forcings for this macroevolutionary step toward establishing modern coccolithophore communities that are dominated by eurythermal and eurytrophic species such as Emiliania huxleyi. Plain Language Summary How will marine plankton communities respond to a much warmer world than today? How fast or slow would such changes be? We can learn valuable lessons from the fossil record of coccolithophores that represent a prominent phytoplankton group ... Article in Journal/Newspaper Antarc* Antarctic Uppsala University: Publications (DiVA) Antarctic Paleoceanography and Paleoclimatology 35 8 |
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Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
spellingShingle |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap Henderiks, Jorijntje Bartol, Milos Pige, Nicolas Karatsolis, Boris-Theofanis Lougheed, Bryan C. Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene |
topic_facet |
Earth and Related Environmental Sciences Geovetenskap och miljövetenskap |
description |
The abundance and composition of modern phytoplankton are primarily related to equator‐to‐pole temperature gradients and global ocean circulation, which in turn determine the availability of nutrients in the photic zone. The nutricline is found at greater depths in warm, tropical waters, whereas more vigorous surface mixing in higher latitudes (seasonally) enhances nutrient availability and primary productivity. Ocean temperatures were ~7°C higher during the middle Miocene Climatic Optimum (MCO; ~16.9–14.7 million years ago, Ma), which was followed by Antarctic glaciation and global cooling during the middle Miocene Climate transition (MMCT; 14.7–13.8 Ma). Four decades ago, Haq (1980, https://doi.org.10.2307/1485353) already related migration patterns of low‐latitude versus high‐latitude calcareous nannoplankton in the Atlantic Ocean to major climatic fluctuations during the Miocene. Here, we detail and discuss the macroevolutionary patterns and processes across the middle Miocene (~16.5–11 Ma) at five deep sea sites on a north‐south transect in the Atlantic Ocean (57°N to 28°S). We show that the major cooling step toward the modern “icehouse” world impacted coccolithophore communities at all latitudes. Contrary to previous observations suggesting that tropical sites showed little change and that midlatitudes were the most sensitive recorders of climate change across the MMCT, we show that all sites recorded a marked diversification and increase in abundance of reticulofenestrids. Global cooling and related increased meridional overturning circulation are implicated as likely forcings for this macroevolutionary step toward establishing modern coccolithophore communities that are dominated by eurythermal and eurytrophic species such as Emiliania huxleyi. Plain Language Summary How will marine plankton communities respond to a much warmer world than today? How fast or slow would such changes be? We can learn valuable lessons from the fossil record of coccolithophores that represent a prominent phytoplankton group ... |
format |
Article in Journal/Newspaper |
author |
Henderiks, Jorijntje Bartol, Milos Pige, Nicolas Karatsolis, Boris-Theofanis Lougheed, Bryan C. |
author_facet |
Henderiks, Jorijntje Bartol, Milos Pige, Nicolas Karatsolis, Boris-Theofanis Lougheed, Bryan C. |
author_sort |
Henderiks, Jorijntje |
title |
Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene |
title_short |
Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene |
title_full |
Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene |
title_fullStr |
Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene |
title_full_unstemmed |
Shifts in Phytoplankton Composition and Stepwise Climate Change During the Middle Miocene |
title_sort |
shifts in phytoplankton composition and stepwise climate change during the middle miocene |
publisher |
Uppsala universitet, Paleobiologi |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-417607 https://doi.org/10.1029/2020PA003915 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Paleoceanography and Paleoclimatology, 2572-4517, 2020, 35:8, orcid:0000-0001-9486-6275 orcid:0000-0002-7475-2921 orcid:0000-0002-6248-2151 orcid:0000-0002-1687-2896 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-417607 doi:10.1029/2020PA003915 ISI:000567508700002 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020PA003915 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
35 |
container_issue |
8 |
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1782328886441279488 |