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A palaeobotanical perspective on the great end-Permian biotic crisis
Cascales-Miñana, B.; Diez, J.B.; Gerrienne, P.; Cleal, C.J. (2016). A palaeobotanical perspective on the great end-Permian biotic crisis. Historical Biology 28(8): 1066-1074. https://dx.doi.org/10.1080/08912963.2015.1103237
In: Historical Biology. TAYLOR & FRANCIS LTD: Abingdon. ISSN 0891-2963; e-ISSN 1029-2381, more
Peer reviewed article  

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Keywords
    Marine/Coastal; Terrestrial
Author keywords
    Biosphere dynamics; continental diversity; global extinction; massdepletion; palaeodiversity; plant fossil

Authors  Top 
  • Cascales-Miñana, B., more
  • Diez, J.B.
  • Gerrienne, P., more
  • Cleal, C.J.

Abstract
    Mass extinctions are crucial to understanding changes in biodiversity through time. However, it is still disputed whether extinction dynamics in the marine and terrestrial biotas followed comparable trajectories. For instance, while marine realms have suffered five strong depletions in diversity, the so-called 'Big Five' mass extinctions, only the end-Permian event appears to have also resulted in a major abrupt reduction in continental diversity. However, recent evidence based on the diversity dynamics of vegetation has suggested the presence of two major episodes of extinction in the terrestrial environments, at the end-Carboniferous and the end-Permian times. This apparent contradiction is addressed in the present study. Here, we show that while the end-Carboniferous plant extinction was focused on particular environments (e.g. tropical wetlands) and affected mainly the free-sporing plant diversity (i.e. lycopsids, ferns and progymnosperms), only the end-Permian mass extinction had devastating effects on vegetation on a global scale. If we take the biosphere as a whole, the results highlight that the end-Permian biotic crisis was the only genuine global mass extinction event, affecting widely both the marine and terrestrial environments.

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