Revisiting the sedimentary record of the rise of diatoms
Diatoms are a major primary producer in the modern oceans and play a critical role in the marine silica cycle. Their rise to dominance is recognized as one of the largest shifts in Cenozoic marine ecosystems, but the timing of this transition is debated. Here, we use a diagenetic model to examine th...
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ftzenodo:oai:zenodo.org:4929160 2024-09-15T17:57:30+00:00 Revisiting the sedimentary record of the rise of diatoms Westacott, Sophie Planavsky, Noah Zhao, Ming-Yu Hull, Pincelli 2021-06-11 https://doi.org/10.5061/dryad.hx3ffbgcb unknown Zenodo https://doi.org/10.1126/science.1185581 https://doi.org/10.1073/pnas.0812979106 https://doi.org/10.1016/j.gca.2016.07.022 https://doi.org/10.1016/S0967-0645(96)00108-7 https://doi.org/10.1016/j.quascirev.2006.02.011 https://doi.org/10.5194/cp-5-309-2009 https://doi.org/10.1016/j.palaeo.2007.09.016 https://doi.org/10.1146/annurev-earth-040809-152402 https://doi.org/10.1038/ncomms2508 https://doi.org/10.1016/j.epsl.2016.08.006 https://doi.org/10.1016/S0967-0645(96)00113-0 https://doi.org/10.5194/bg-13-6003-2016 https://doi.org/10.1029/2011JC007255 https://doi.org/10.1029/2008PA001683 https://doi.org/10.1038/nature07435 https://doi.org/10.26879/1032 https://doi.org/10.1016/S0079-6611(01)00053-2 https://doi.org/10.1016/S0012-821X(01)00501-5 https://doi.org/10.1029/2004PA001071 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.hx3ffbgcb oai:zenodo.org:4929160 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other 2021 ftzenodo https://doi.org/10.5061/dryad.hx3ffbgcb10.1126/science.118558110.1073/pnas.081297910610.1016/j.gca.2016.07.02210.1016/S0967-0645(96)00108-710.1016/j.quascirev.2006.02.01110.5194/cp-5-309-200910.1016/j.palaeo.2007.09.01610.1146/annurev-earth-040809-1524021 2024-07-26T18:15:26Z Diatoms are a major primary producer in the modern oceans and play a critical role in the marine silica cycle. Their rise to dominance is recognized as one of the largest shifts in Cenozoic marine ecosystems, but the timing of this transition is debated. Here, we use a diagenetic model to examine the effect of sedimentation rate and temperature on the burial efficiency of biogenic silica over the past 66 million years (i.e., the Cenozoic). We find that the changing preservation potential of siliceous microfossils during that time would have overprinted the primary signal of diatom and radiolarian abundance. We generate a taphonomic null hypothesis of the diatom fossil record by assuming a constant flux of diatoms to the sea floor and having diagenetic conditions driven by observed shifts in temperature and sedimentation rate. This null hypothesis produces a late Cenozoic (~5-20 Ma) increase in the relative abundance of fossilized diatoms that is comparable to current empirical records. This suggests that the observed increase in diatom abundance in the sedimentary record may be driven by changing preservation potential. A late Cenozoic rise in diatoms has been causally tied to the rise of grasslands and baleen whales and to declining atmospheric CO 2 levels. Here we suggest that the similarity among these records primarily arises from a common driver—the cooling climate system—that drove enhanced diatom preservation as well as the rise of grasslands and whales, rather than a causal link amongst them. Code and datasets (csv and txt files) for all analyses and figures. Using included RProject is recommended. ReadMe file provides order of operations (code must be run in sequence) and data source citations. Other/Unknown Material baleen whales Zenodo |
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Diatoms are a major primary producer in the modern oceans and play a critical role in the marine silica cycle. Their rise to dominance is recognized as one of the largest shifts in Cenozoic marine ecosystems, but the timing of this transition is debated. Here, we use a diagenetic model to examine the effect of sedimentation rate and temperature on the burial efficiency of biogenic silica over the past 66 million years (i.e., the Cenozoic). We find that the changing preservation potential of siliceous microfossils during that time would have overprinted the primary signal of diatom and radiolarian abundance. We generate a taphonomic null hypothesis of the diatom fossil record by assuming a constant flux of diatoms to the sea floor and having diagenetic conditions driven by observed shifts in temperature and sedimentation rate. This null hypothesis produces a late Cenozoic (~5-20 Ma) increase in the relative abundance of fossilized diatoms that is comparable to current empirical records. This suggests that the observed increase in diatom abundance in the sedimentary record may be driven by changing preservation potential. A late Cenozoic rise in diatoms has been causally tied to the rise of grasslands and baleen whales and to declining atmospheric CO 2 levels. Here we suggest that the similarity among these records primarily arises from a common driver—the cooling climate system—that drove enhanced diatom preservation as well as the rise of grasslands and whales, rather than a causal link amongst them. Code and datasets (csv and txt files) for all analyses and figures. Using included RProject is recommended. ReadMe file provides order of operations (code must be run in sequence) and data source citations. |
format |
Other/Unknown Material |
author |
Westacott, Sophie Planavsky, Noah Zhao, Ming-Yu Hull, Pincelli |
spellingShingle |
Westacott, Sophie Planavsky, Noah Zhao, Ming-Yu Hull, Pincelli Revisiting the sedimentary record of the rise of diatoms |
author_facet |
Westacott, Sophie Planavsky, Noah Zhao, Ming-Yu Hull, Pincelli |
author_sort |
Westacott, Sophie |
title |
Revisiting the sedimentary record of the rise of diatoms |
title_short |
Revisiting the sedimentary record of the rise of diatoms |
title_full |
Revisiting the sedimentary record of the rise of diatoms |
title_fullStr |
Revisiting the sedimentary record of the rise of diatoms |
title_full_unstemmed |
Revisiting the sedimentary record of the rise of diatoms |
title_sort |
revisiting the sedimentary record of the rise of diatoms |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.5061/dryad.hx3ffbgcb |
genre |
baleen whales |
genre_facet |
baleen whales |
op_relation |
https://doi.org/10.1126/science.1185581 https://doi.org/10.1073/pnas.0812979106 https://doi.org/10.1016/j.gca.2016.07.022 https://doi.org/10.1016/S0967-0645(96)00108-7 https://doi.org/10.1016/j.quascirev.2006.02.011 https://doi.org/10.5194/cp-5-309-2009 https://doi.org/10.1016/j.palaeo.2007.09.016 https://doi.org/10.1146/annurev-earth-040809-152402 https://doi.org/10.1038/ncomms2508 https://doi.org/10.1016/j.epsl.2016.08.006 https://doi.org/10.1016/S0967-0645(96)00113-0 https://doi.org/10.5194/bg-13-6003-2016 https://doi.org/10.1029/2011JC007255 https://doi.org/10.1029/2008PA001683 https://doi.org/10.1038/nature07435 https://doi.org/10.26879/1032 https://doi.org/10.1016/S0079-6611(01)00053-2 https://doi.org/10.1016/S0012-821X(01)00501-5 https://doi.org/10.1029/2004PA001071 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.hx3ffbgcb oai:zenodo.org:4929160 |
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.hx3ffbgcb10.1126/science.118558110.1073/pnas.081297910610.1016/j.gca.2016.07.02210.1016/S0967-0645(96)00108-710.1016/j.quascirev.2006.02.01110.5194/cp-5-309-200910.1016/j.palaeo.2007.09.01610.1146/annurev-earth-040809-1524021 |
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