Environmental mutagenesis during the end-Permian ecological crisis
نویسندگان
چکیده
منابع مشابه
Environmental mutagenesis during the end-Permian ecological crisis.
During the end-Permian ecological crisis, terrestrial ecosystems experienced preferential dieback of woody vegetation. Across the world, surviving herbaceous lycopsids played a pioneering role in repopulating deforested terrain. We document that the microspores of these lycopsids were regularly released in unseparated tetrads indicative of failure to complete the normal process of spore develop...
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The end-Permian mass extinction was the largest biotic crisis in the history of animal life, eliminating as many as 95% of all species and dramatically altering the ecological structure of marine communities. Although the causes of this pronounced ecosystem shift have been widely debated, the broad consensus based on inferences from global taxonomic diversity patterns suggests that the shift fr...
متن کاملTwo pulses of oceanic environmental disturbance during the Permian–Triassic boundary crisis
a State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, Hubei, 430074, PR China b State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, Hubei, 430074, PR China c Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, USA d Department Geology and Geophysics, Yale University,...
متن کاملThe end-Permian extinction
The end Permian extinction was the greatest mass extinction of the Phanerozoic Era. It impacted marine and terrestrial plants and animals. Although the rate of the extinction has been controversial in the past, recent evidence suggests that the extinction progressed in two pulses approximately 5-12 million years apart. The second pulse of the extinction is marked by a sharp temperature spike an...
متن کاملBiogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event
Article history: The Permian–Triassic Boun Received 16 August 2008 Received in revised form 3 February 2009 Accepted 11 February 2009 Available online 19 March 2009 Editor: M.L. Delaney
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2004
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.0404472101