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  • Foster, William J.University of Potsdam,Museum für Naturkunde (author)

Suppressed competitive exclusion enabled the proliferation of Permian/Triassic boundary microbialites

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2019-11-20
  • Wiley,2020
  • 13 s.

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:8f98a37b-dc5e-40d6-96d0-dc1fd0226a51
  • https://lup.lub.lu.se/record/8f98a37b-dc5e-40d6-96d0-dc1fd0226a51URI
  • https://doi.org/10.1002/dep2.97DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • During the earliest Triassic microbial mats flourished in the photic zones of marginal seas, generating widespread microbialites. It has been suggested that anoxic conditions in shallow marine environments, linked to the end-Permian mass extinction, limited mat-inhibiting metazoans allowing for this microbialite expansion. The presence of a diverse suite of proxies indicating oxygenated shallow sea-water conditions (metazoan fossils, biomarkers and redox proxies) from microbialite successions have, however, challenged the inference of anoxic conditions. Here, the distribution and faunal composition of Griesbachian microbialites from China, Iran, Turkey, Armenia, Slovenia and Hungary are investigated to determine the factors that allowed microbialite-forming microbial mats to flourish following the end-Permian crisis. The results presented here show that Neotethyan microbial buildups record a unique faunal association due to the presence of keratose sponges, while the Palaeotethyan buildups have a higher proportion of molluscs and the foraminifera Earlandia. The distribution of the faunal components within the microbial fabrics suggests that, except for the keratose sponges and some microconchids, most of the metazoans were transported into the microbial framework via wave currents. The presence of both microbialites and metazoan associations were limited to oxygenated settings, suggesting that a factor other than anoxia resulted in a relaxation of ecological constraints following the mass extinction event. It is inferred that the end-Permian mass extinction event decreased the diversity and abundance of metazoans to the point of significantly reducing competition, allowing photosynthesis-based microbial mats to flourish in shallow water settings and resulting in the formation of widespread microbialites.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Heindel, KatrinUniversity of Vienna (author)
  • Richoz, SylvainLund University,Lunds universitet,Geologiska institutionen,Naturvetenskapliga fakulteten,Department of Geology,Faculty of Science,Karl-Franzens-University of Graz(Swepub:lu)sy2872ri (author)
  • Gliwa, JanaMuseum für Naturkunde (author)
  • Lehrmann, Daniel J.Trinity University (author)
  • Baud, AymonUniversity of Lausanne (author)
  • Kolar-Jurkovšek, TeaGeological Survey of Slovenia (author)
  • Aljinović, DunjaUniversity of Zagreb (author)
  • Jurkovšek, BogdanGeological Survey of Slovenia (author)
  • Korn, DieterMuseum für Naturkunde (author)
  • Martindale, Rowan C.University of Texas at Austin (author)
  • Peckmann, JörnUniversity of Hamburg (author)
  • University of PotsdamMuseum für Naturkunde (creator_code:org_t)

Related titles

  • In:Depositional Record: Wiley6:1, s. 62-742055-4877

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