Mutagenesis in land plants during the end-Triassic mass extinction
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Mutagenesis in land plants during the end-Triassic mass extinction. / Lindström, Sofie; Sanei, Hamed; van de Schootbrugge, Bas; Pedersen, Gunver Krarup; Lesher, Charles E.; Tegner, Christian; Heunisch, Carmen; Dybkjær, Karen; Outridge, Peter.
2019. Abstract from EGU Galileo Conference, Utrecht, Netherlands.Research output: Contribution to conference › Conference abstract for conference › Research › peer-review
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TY - ABST
T1 - Mutagenesis in land plants during the end-Triassic mass extinction
AU - Lindström, Sofie
AU - Sanei, Hamed
AU - van de Schootbrugge, Bas
AU - Pedersen, Gunver Krarup
AU - Lesher, Charles E.
AU - Tegner, Christian
AU - Heunisch, Carmen
AU - Dybkjær, Karen
AU - Outridge, Peter
N1 - Conference code: 5
PY - 2019
Y1 - 2019
N2 - During the last 600 million years of Earth history, four out of five major extinction events were synchronous withvolcanism in large igneous provinces. Despite improved temporal frameworks for these events, the mechanismscausing extinctions remain unclear. Volcanic emissions of greenhouse gases, SO2 and halocarbons are generallyconsidered as major factors in these biotic crises, resulting in global warming, acid rain and ozone-layer depletion.The occurrence of increased abundances of malformed land plant spores and pollen during the end-Permian andend-Devonian events have mainly been attributed to increased UV-B radiation due to ozone layer depletion. Here,we report exceptionally abundant malformed fern spores in Triassic–Jurassic boundary successions in Denmark,Sweden, and Germany. The high occurrences of abnormal fern spores during and after the mass extinction intervalindicate severe environmental stress and genetic disturbance in the parent plants. This coincides with increasedlevels of mercury – the most genotoxic element on Earth – in both marine and terrestrial Triassic–Jurassic boundarysuccessions, and offers compelling evidence that emissions of toxic volcanogenic substances contributed to theend-Triassic biotic crisis
AB - During the last 600 million years of Earth history, four out of five major extinction events were synchronous withvolcanism in large igneous provinces. Despite improved temporal frameworks for these events, the mechanismscausing extinctions remain unclear. Volcanic emissions of greenhouse gases, SO2 and halocarbons are generallyconsidered as major factors in these biotic crises, resulting in global warming, acid rain and ozone-layer depletion.The occurrence of increased abundances of malformed land plant spores and pollen during the end-Permian andend-Devonian events have mainly been attributed to increased UV-B radiation due to ozone layer depletion. Here,we report exceptionally abundant malformed fern spores in Triassic–Jurassic boundary successions in Denmark,Sweden, and Germany. The high occurrences of abnormal fern spores during and after the mass extinction intervalindicate severe environmental stress and genetic disturbance in the parent plants. This coincides with increasedlevels of mercury – the most genotoxic element on Earth – in both marine and terrestrial Triassic–Jurassic boundarysuccessions, and offers compelling evidence that emissions of toxic volcanogenic substances contributed to theend-Triassic biotic crisis
KW - Faculty of Science
KW - mass extinction
KW - Triassic
KW - Jurassic
KW - palynology
KW - mutations
KW - mercury toxicity
M3 - Conference abstract for conference
T2 - EGU Galileo Conference
Y2 - 28 August 2019 through 31 August 2019
ER -
ID: 359341776