Impact of Permian mass extinctions on continental invertebrate infauna



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Buatois, Luis A. and Borruel Abadía, Violeta and Horra del Barco, Raúl de la and Galán Abellán, Ana Belén and Fernández Barrenechea, José María and Arche, Alfredo (2021) Impact of Permian mass extinctions on continental invertebrate infauna. Terra Nova . ISSN 0954-4879

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The Capitanian (late middle Permian) and end‐Permian mass extinctions were particularly severe from a palaeoecological perspective. Previous studies of their expressions on land underscored their impacts on plants and vertebrates, but the effects on the continental invertebrate infauna remain poorly understood. A multiproxy analysis from the Iberian Basin (Central Spain) reveals a dramatic decrease in bioturbation intensity on land by the end of the Capitanian. This pattern cannot be explained by facies effects because our analysis is based on similar types of deposits through the succession and over an extensive area. The bioturbation crisis coincided with an increase in weathering intensity and acidic conditions, and a collapse in plant communities spanning the late Permian–Early Triassic in the Iberian Basin. Reduced bioturbation may have contributed to decrease in mechanical reworking of the sediment and soil, affected geochemical recycling, increased sediment acidification and impacted on ecosystem structure. Identification of this infaunal crisis on land underscores the ecological severity of mass extinctions and emphasises the significance of feedback loops in riparian ecosystems.

Item Type:Article
Uncontrolled Keywords:acidification, bioturbation, Capitanian mass extinction, continental infauna, end‐Permian mass extinction, fluvial
Subjects:Sciences > Geology > Stratigraphic geology
Sciences > Geology > Paleontology
ID Code:65456
Deposited On:12 May 2021 16:24
Last Modified:13 May 2021 07:53

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