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Boreal earliest Triassic biotas elucidate globally depauperate hard substrate communities after the end-Permian mass extinction
Univ Silesia, Fac Earth Sci, Bedzinska 60, PL-41200 Sosnowiec, Poland.;KNOW Leading Natl Res Ctr, Ctr Polar Studies, Sosnowiec, Poland..
Uppsala universitet, Evolution och utvecklingsbiologi.
Uppsala universitet, Evolution och utvecklingsbiologi.
Uppsala universitet, Evolutionsmuseet.
Ansvarlig organisasjon
2016 (engelsk)Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 6, artikkel-id 36345Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The end-Permian mass extinction constituted the most devastating biotic crisis of the Phanerozoic. Its aftermath was characterized by harsh marine conditions incorporating volcanically induced oceanic warming, widespread anoxia and acidification. Bio-productivity accordingly experienced marked fluctuations. In particular, low palaeolatitude hard substrate communities from shallow seas fringing Western Pangaea and the Tethyan Realm were extremely impoverished, being dominated by monogeneric colonies of filter-feeding microconchid tubeworms. Here we present the first equivalent field data for Boreal hard substrate assemblages from the earliest Triassic (Induan) of East Greenland. This region bordered a discrete bio-realm situated at mid-high palaeolatitude (> 30 degrees N). Nevertheless, hard substrate biotas were compositionally identical to those from elsewhere, with microconchids encrusting Claraia bivalves and algal buildups on the sea floor. Biostratigraphical correlation further shows that Boreal microconchids underwent progressive tube modification and unique taxic diversification concordant with changing habitats over time. We interpret this as a post-extinction recovery and adaptive radiation sequence that mirrored coeval subequatorial faunas, and thus confirms hard substrate ecosystem depletion as a hallmark of the earliest Triassic interval globally.

sted, utgiver, år, opplag, sider
2016. Vol. 6, artikkel-id 36345
HSV kategori
Forskningsprogram
SWEDARCTIC; SWEDARCTIC 2015, Östra Grönland 2015; SWEDARCTIC 2016, Östra Grönland 2016
Identifikatorer
URN: urn:nbn:se:polar:diva-8764DOI: 10.1038/srep36345ISI: 000387314500001PubMedID: 27821855OAI: oai:DiVA.org:polar-8764DiVA, id: diva2:1605897
Forskningsfinansiär
Swedish Polar Research SecretariatTilgjengelig fra: 2021-10-26 Laget: 2021-10-26 Sist oppdatert: 2022-09-15bibliografisk kontrollert

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Niedzwiedzki, GrzegorzBlom, HenningKear, Benjamin P.
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