An unusually diverse mollusc fauna from the earliest Triassic of South China and its implications for benthic recovery after the end-Permian biotic crisis

Hautmann, Michael; Bucher, Hugo; Brühwiler, Thomas; Goudemand, Nicolas; Kaim, Andrzej; Nützel, Alexander

doi:10.1016/j.geobios.2010.07.004

Cited by 86 publications

(90 citation statements)

References 48 publications

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“…S5a). Absence of the negative CIE in microbial limestone bearing sections20 supports the extension of the PTB hiatus into basal Griesbachian shallow water records (see Supplementary Fig. S5b).…”

Section: Duration Of the Hiatus And Microbial Bloomsupporting

confidence: 64%

Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms

Baresel

Bucher

Bagherpour

et al. 2017

Sci Rep

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New high-resolution U-Pb dates indicate a duration of 89 ± 38 kyr for the Permian hiatus and of 14 ± 57 kyr for the overlying Triassic microbial limestone in shallow water settings of the Nanpanjiang Basin, South China. The age and duration of the hiatus coincides with the Permian-Triassic boundary (PTB) and the extinction interval in the Meishan Global Stratotype Section and Point, and strongly supports a glacio-eustatic regression, which best explains the genesis of the worldwide hiatus straddling the PTB in shallow water records. In adjacent deep marine troughs, rates of sediment accumulation display a six-fold decrease across the PTB compatible with a dryer and cooler climate as indicated by terrestrial plants. Our model of the Permian-Triassic boundary mass extinction (PTBME) hinges on the synchronicity of the hiatus with the onset of the Siberian Traps volcanism. This early eruptive phase released sulfur-rich volatiles into the stratosphere, thus simultaneously eliciting a short-lived ice age responsible for the global regression and a brief but intense acidification. Abrupt cooling, shrunk habitats on shelves and acidification may all have synergistically triggered the PTBME. Subsequently, the build-up of volcanic CO2 induced a transient cool climate whose early phase saw the deposition of the microbial limestone.

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Section: Duration Of the Hiatus And Microbial Bloomsupporting

confidence: 64%

Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms

Baresel

Bucher

Bagherpour

et al. 2017

Sci Rep

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“…Instead, several studies have documented that intervals of recovery were reset by renewed environmental perturbations Z.Q. Chen et al, 2011;Hautmann et al, 2011;Hofmann et al, 2011;Wu et al, 2012). Similar pictures have been drawn for the continental floras, with a catastrophic reduction in standing biomass and the demise of forests (e.g.…”

Section: Skmentioning

confidence: 83%

Vegetation history across the Permian–Triassic boundary in Pakistan (Amb section, Salt Range)

et al. 2015

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“…By the Spathian (late Olenekian), however, bivalves and foraminiferans, together with boring suspension-feeders3359 had colonised hard substrates to create transient metazoan reefs; these established on multi-taxic sponge60 and bivalve61 frameworks during the Smithian–Spathian “coral gap”101160. The recovery of lower tier, skeletonised biotas was therefore evidently delayed in comparison to soft-bottom communities313262, a phenomenon that we show manifested simultaneously within both low, and mid-high palaeolatitude assemblages. Certainly, some filter feeding organisms such as crinoids seem to have re-diversified earlier in the Boreal Realm (at least after the latest Induan A. fassaensis bivalve zone equivalent63), yet typical encrusters including cyclostome bryozoans and serpulid polychaetes did not fully re-establish until the Rhaetian64.…”

Section: Discussionmentioning

confidence: 99%

Boreal earliest Triassic biotas elucidate globally depauperate hard substrate communities after the end-Permian mass extinction

Zatoń

Niedźwiedzki

Blom

et al. 2016

Sci Rep

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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°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.

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An unusually diverse mollusc fauna from the earliest Triassic of South China and its implications for benthic recovery after the end-Permian biotic crisis

Cited by 86 publications

References 48 publications

Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms

Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms

Vegetation history across the Permian–Triassic boundary in Pakistan (Amb section, Salt Range)

Boreal earliest Triassic biotas elucidate globally depauperate hard substrate communities after the end-Permian mass extinction

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