Cargando…

Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth

Eukaryotic algae rose to ecological relevance after the Neoproterozoic Snowball Earth glaciations, but the causes for this consequential evolutionary transition remain enigmatic. Cap carbonates were globally deposited directly after these glaciations, but they are usually organic barren or thermally...

Descripción completa

Detalles Bibliográficos
Autores principales: van Maldegem, Lennart M., Sansjofre, Pierre, Weijers, Johan W. H., Wolkenstein, Klaus, Strother, Paul K., Wörmer, Lars, Hefter, Jens, Nettersheim, Benjamin J., Hoshino, Yosuke, Schouten, Stefan, Sinninghe Damsté, Jaap S., Nath, Nilamoni, Griesinger, Christian, Kuznetsov, Nikolay B., Elie, Marcel, Elvert, Marcus, Tegelaar, Erik, Gleixner, Gerd, Hallmann, Christian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6351664/
https://www.ncbi.nlm.nih.gov/pubmed/30696819
http://dx.doi.org/10.1038/s41467-019-08306-x
_version_ 1783390626121777152
author van Maldegem, Lennart M.
Sansjofre, Pierre
Weijers, Johan W. H.
Wolkenstein, Klaus
Strother, Paul K.
Wörmer, Lars
Hefter, Jens
Nettersheim, Benjamin J.
Hoshino, Yosuke
Schouten, Stefan
Sinninghe Damsté, Jaap S.
Nath, Nilamoni
Griesinger, Christian
Kuznetsov, Nikolay B.
Elie, Marcel
Elvert, Marcus
Tegelaar, Erik
Gleixner, Gerd
Hallmann, Christian
author_facet van Maldegem, Lennart M.
Sansjofre, Pierre
Weijers, Johan W. H.
Wolkenstein, Klaus
Strother, Paul K.
Wörmer, Lars
Hefter, Jens
Nettersheim, Benjamin J.
Hoshino, Yosuke
Schouten, Stefan
Sinninghe Damsté, Jaap S.
Nath, Nilamoni
Griesinger, Christian
Kuznetsov, Nikolay B.
Elie, Marcel
Elvert, Marcus
Tegelaar, Erik
Gleixner, Gerd
Hallmann, Christian
author_sort van Maldegem, Lennart M.
collection PubMed
description Eukaryotic algae rose to ecological relevance after the Neoproterozoic Snowball Earth glaciations, but the causes for this consequential evolutionary transition remain enigmatic. Cap carbonates were globally deposited directly after these glaciations, but they are usually organic barren or thermally overprinted. Here we show that uniquely-preserved cap dolostones of the Araras Group contain exceptional abundances of a newly identified biomarker: 25,28-bisnorgammacerane. Its secular occurrence, carbon isotope systematics and co-occurrence with other demethylated terpenoids suggest a mechanistic connection to extensive microbial degradation of ciliate-derived biomass in bacterially dominated ecosystems. Declining 25,28-bisnorgammacerane concentrations, and a parallel rise of steranes over hopanes, indicate the transition from a bacterial to eukaryotic dominated ecosystem after the Marinoan deglaciation. Nutrient levels already increased during the Cryogenian and were a prerequisite, but not the ultimate driver for the algal rise. Intense predatory pressure by bacterivorous protists may have irrevocably cleared self-sustaining cyanobacterial ecosystems, thereby creating the ecological opportunity that allowed for the persistent rise of eukaryotic algae to global importance.
format Online
Article
Text
id pubmed-6351664
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-63516642019-01-31 Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth van Maldegem, Lennart M. Sansjofre, Pierre Weijers, Johan W. H. Wolkenstein, Klaus Strother, Paul K. Wörmer, Lars Hefter, Jens Nettersheim, Benjamin J. Hoshino, Yosuke Schouten, Stefan Sinninghe Damsté, Jaap S. Nath, Nilamoni Griesinger, Christian Kuznetsov, Nikolay B. Elie, Marcel Elvert, Marcus Tegelaar, Erik Gleixner, Gerd Hallmann, Christian Nat Commun Article Eukaryotic algae rose to ecological relevance after the Neoproterozoic Snowball Earth glaciations, but the causes for this consequential evolutionary transition remain enigmatic. Cap carbonates were globally deposited directly after these glaciations, but they are usually organic barren or thermally overprinted. Here we show that uniquely-preserved cap dolostones of the Araras Group contain exceptional abundances of a newly identified biomarker: 25,28-bisnorgammacerane. Its secular occurrence, carbon isotope systematics and co-occurrence with other demethylated terpenoids suggest a mechanistic connection to extensive microbial degradation of ciliate-derived biomass in bacterially dominated ecosystems. Declining 25,28-bisnorgammacerane concentrations, and a parallel rise of steranes over hopanes, indicate the transition from a bacterial to eukaryotic dominated ecosystem after the Marinoan deglaciation. Nutrient levels already increased during the Cryogenian and were a prerequisite, but not the ultimate driver for the algal rise. Intense predatory pressure by bacterivorous protists may have irrevocably cleared self-sustaining cyanobacterial ecosystems, thereby creating the ecological opportunity that allowed for the persistent rise of eukaryotic algae to global importance. Nature Publishing Group UK 2019-01-29 /pmc/articles/PMC6351664/ /pubmed/30696819 http://dx.doi.org/10.1038/s41467-019-08306-x Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
van Maldegem, Lennart M.
Sansjofre, Pierre
Weijers, Johan W. H.
Wolkenstein, Klaus
Strother, Paul K.
Wörmer, Lars
Hefter, Jens
Nettersheim, Benjamin J.
Hoshino, Yosuke
Schouten, Stefan
Sinninghe Damsté, Jaap S.
Nath, Nilamoni
Griesinger, Christian
Kuznetsov, Nikolay B.
Elie, Marcel
Elvert, Marcus
Tegelaar, Erik
Gleixner, Gerd
Hallmann, Christian
Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth
title Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth
title_full Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth
title_fullStr Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth
title_full_unstemmed Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth
title_short Bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after Snowball Earth
title_sort bisnorgammacerane traces predatory pressure and the persistent rise of algal ecosystems after snowball earth
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6351664/
https://www.ncbi.nlm.nih.gov/pubmed/30696819
http://dx.doi.org/10.1038/s41467-019-08306-x
work_keys_str_mv AT vanmaldegemlennartm bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT sansjofrepierre bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT weijersjohanwh bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT wolkensteinklaus bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT strotherpaulk bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT wormerlars bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT hefterjens bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT nettersheimbenjaminj bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT hoshinoyosuke bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT schoutenstefan bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT sinninghedamstejaaps bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT nathnilamoni bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT griesingerchristian bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT kuznetsovnikolayb bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT eliemarcel bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT elvertmarcus bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT tegelaarerik bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT gleixnergerd bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth
AT hallmannchristian bisnorgammaceranetracespredatorypressureandthepersistentriseofalgalecosystemsaftersnowballearth