منابع مشابه
Hypoxia, global warming, and terrestrial late Permian extinctions.
A catastrophic extinction occurred at the end of the Permian Period. However, baseline extinction rates appear to have been elevated even before the final catastrophe, suggesting sustained environmental degradation. For terrestrial vertebrates during the Late Permian, the combination of a drop in atmospheric oxygen plus climate warming would have induced hypoxic stress and consequently compress...
متن کاملLate Quaternary Extinctions: State of the Debate
Between fifty and ten thousand years ago, most large mammals became extinct everywhere except Africa. Slow-breeding animals also were hard hit, regardless of size. This unusual extinction of large and slow-breeding animals provides some of the strongest support for a human contribution to their extinction and is consistent with various human hunting models, but it is difficult to explain by mod...
متن کاملResponse of Late Carboniferous and Early Permian Plant Communities to Climate Change1
William A DiMichele2, Hermann W Pfefferkorn3, and Robert A Gastaldo4 2Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560; e-mail: [email protected] 3Department of Earth and Environmental Sciences, University of Pennsylvania, Philadelphia, Pennsylvania 19104; e-mail: [email protected] 4Department of Geology, Colby College...
متن کاملProlonged Permian Triassic ecological crisis recorded by molluscan dominance in Late Permian offshore assemblages.
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 کاملModeling the Role of Primary Productivity Disruption in End- Permian Extinctions, Karoo Basin, South Africa
The end-Permian mass extinction is well-known as the most severe mass extinction of the Phanerozoic. Terrestrial communities appear to have been strongly affected by the event, but the cause of the extinction remains enigmatic. Here we explore whether primary producer disruption (e.g., extinction of terrestrial plants) could have led to a collapse of end-Permian terrestrial ecosystems, using mo...
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ژورنال
عنوان ژورنال: Science
سال: 1996
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.274.5292.1552a