|Title / Titel||Earliest benthic faunas and paleoceanography following the Permian- Triassic mass extinction in the South China block|
|Abstract (PDF, 14 KB)|
|Summary / Zusammenfassung||This project investigates the benthic macrofaunas from the microbial limestone in South China. This peculiar microbial limestone is the hallmark of the extinction in the equatorial Tethys. The few known earliest Triassic benthic faunas are usually interpreted as having survived in refugia. The new faunas from the microbial limestone evidently questioned this refuge concept and are expected to yield new insights on patterns of extinction, survival and recovery of the macrobenthos. Moreover, the autecological and synecological analyses of these new faunas will also improve our understanding of the paleoenvironmental puzzling context of this supposedly "disaster" and “anachronistic,” microbe-dominated biota.
Nd isotopic composition allows discriminating distinct water masses and to hence, to detect
any rise (of absence thereof) of the oxygen minimum zone onto the shallow shelves where microbial limestone formed. As anoxia is usually perceived as being the prime kill mechanism of the end-Permian mass extinction and is supposed to have delayed the recovery of marine organisms, the study of these new shallow water benthic faunas coupled with the distribution of water masses in time and space across the same basin will provide a crucial test for the anoxia paradigm.
|Publications / Publikationen||BRAYARD, A., NÜTZEL, A., KAIM, A., ESCARGUEL, G., HAUTMANN, M., STEPHEN, D.A., BYLUND, K.G. JENKS, J. & BUCHER, H. (2011). Gastropod evidence against the Early Triassic Lilliput effect: REPLY. - Geology 39, e233, doi:10.1130/G31765Y.1.HAUTMANN, M., BUCHER, H., BRÜHWILER, T., GOUDEMAND, N., KAIM, A. & NÜTZEL, A. (2011): An unusually diverse mollusc fauna from the earliest Triassic of South China and its implications for benthic recovery after the end-Permian biotic crisis. - Geobios 44: 71-85. doi:10.1016/j.geobios.2010.07.004Weitere Informationen|
|Keywords / Suchbegriffe||Triassic, trace fossil, bivalve, gastropod, disaster biota, benthos, palaeoceanography|
|Project leadership and contacts /
Projektleitung und Kontakte
|Funding source(s) /
|Other Public Sources (e.g. Federal or Cantonal Agencies)
Post-Doc project (Dr Åsa Frisk) funded by the Swedish Research Council
|Duration of Project / Projektdauer||Jan 2011 to Jan 2013|