invertebrates; mass extinction; carbon isotopes; benthos; palaeoecology; recovery; palaeoenvironments; Early Triassic
Hofmann Richard, Hautmann Michael, Bucher Hugo (2015), Recovery dynamics of benthic marine communities from the Lower Triassic Werfen Formation, northern Italy, in Lethaia
, 48(4), 474-496.
Hofmann Richard, Hautmann Michael, Brayard Arnaud, Nützel Alexander, Bylund Kevin G., Jenks James F., Vennin Emmanuelle, Olivier Nicolas, Bucher Hugo (2014), Recovery of benthic marine communities from the end-Permian mass extinction at the low latitudes of eastern Panthalassa, in Palaeontology
, 57(3), 547-589.
Hofmann Richard, Hautmann Michael, Wasmer Martin, Bucher Hugo (2013), Palaeoecology of the Spathian Virgin Formation (Utah, USA) and its implications for the Early Triassic recovery, in Acta Palaeontologica Polonica
, 58(1), 149-173.
Hautmann Michael, Smith Andrew, McGowan Alistair, Bucher H. (2012), Bivalves from the Olenekian (Early Triassic) of south-western Utah: systematics and evolutionary significance, in Journal of Systematic Palaeontology
, iFirst 2012, 1-31.
Wasmer Martin, Hautmann Michael, Hermann Elke, Ware David, Roohi Ghazala, Ur-Rehman Khalil, Yaseen Aamir, Bucher Hugo (2012), Olenekian (Early Triassic) bivalves from the Salt Range and Surghar Range, Pakistan, in PALAEONTOLOGY
, 55, 1043-1073.
Hofmann Richard, Hautmann Michael, Bucher Hugo, A new paleoecological look at the Dinwoody Formation (Lower Triassic, Western U.S.): intrinsic versus extrinsic controls on ecosystem recovery after the end-Permian mass extinction., in Journal of Paleontology
Kaim A., Nützel A., Hautmann M., Bucher H., Early Triassic bivalves from Salt Range, Pakistan , in Bulletin of Geosciences
Mass extinction events have been a major focus of palaeontological research in the past decades, but only recently the evolutionary significance of recovery processes in the wake of such events has been recognized. Controversially discussed questions include the role of intrinsic versus environmental factors in delaying biotic recovery, possible decoupling of taxonomic and ecological recovery, and general rules of biodiversification dynamics under the unusual conditions of a largely vacated ecospace. Not unexpectedly, much of this discussion has concentrated on the biotic recovery from the end-Permian mass extinction event as the most severe crisis in the history of life, but only little field data exist to underlay or reject conflicting theories. Particularly quantitative palaeoecological data are virtually missing although they are essential in order to clarify the role of biotic interactions between re-expanding clades as well as evolutionary responses to changing environmental conditions. During the ongoing SNF project 200021-121774 (ending February 2012), quantitative palaeoecological data on Early Triassic marine benthic communities have been collected in two palaeogeographically distant areas, located at low palaeolatitudes on opposite sides of Pangaea: northern Italy (Werfen Formation) and the western USA (Dinwoody Formation, Thayes Formation and equivalents). Well-dated comparative benthic material from previous and ongoing work in Pakistan, South China, and Greenland is also incorporated. The aim of the herein requested 4th project year is completing and further extending the palaeoecological analyses for testing preliminary hypotheses obtained during the first project phase. These include hints at an unexpectedly quick recovery of benthic ecosystems and at decoupling of taxonomic diversification and ecosystem differentiation. The study finally aims at a comprehensive reconstruction of benthic ecosystem recovery after the greatest crisis in the history of life and inferring the role of intrinsic and extrinsic factors in this process.