Museum of Nature South Tyrol, Bindergasse/Via Bottai 1, Bozen, Bolzano, 39100, Italy.
Paläontologisches Institut und Museum, Karl Schmid-Strasse 4, 8006, Zürich, Switzerland.
Nat Commun. 2019 Jan 23;10(1):384. doi: 10.1038/s41467-018-07945-w.
The most severe mass extinction among animals took place in the latest Permian (ca. 252 million years ago). Due to scarce and impoverished fossil floras from the earliest Triassic, the common perception has been that land plants likewise suffered a mass extinction, but doubts remained. Here we use global occurrence data of both plant macro- and microfossils to analyse plant biodiversity development across the Permian-Triassic boundary. We show that the plant fossil record is strongly biased and that evidence for a mass extinction among plants in the latest Permian is not robust. The taxonomic diversities of gymnosperm macrofossils and of the pollen produced by this group are particularly incongruent. Our results indicate that gymnosperm macrofossils are considerably undersampled for the Early Triassic, which creates the impression of increased gymnosperm extinction in the latest Permian.
在动物中，最严重的大规模灭绝发生在最近的二叠纪（约 2.52 亿年前）。由于最早的三叠纪时期的化石植物群稀缺且贫瘠，人们普遍认为陆地植物也遭受了大规模灭绝，但仍存在疑问。在这里，我们使用植物宏观和微观化石的全球出现数据来分析二叠纪-三叠纪边界的植物生物多样性发展。我们表明，植物化石记录存在严重的偏差，并且在最近的二叠纪时期植物大规模灭绝的证据并不稳健。裸子植物宏观化石和该类群产生的花粉的分类多样性尤其不一致。我们的结果表明，裸子植物宏观化石在早三叠世的采样严重不足，这给人留下了在最近的二叠纪时期裸子植物灭绝加剧的印象。
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