PPT-Crisis at the end of the Permian: global change and the greatest mass extinction in the

Pedro J Marenco Bryn Mawr College Department of Geology End Cretaceous Mass Extinction End Permian Mass Extinction The Big 5 Mass Extinctions modified from Alroy 2010 End Permian End Triassic. ASTR 1420. Lecture. 9. Sections : 4.6, 6.4, 11.3. Mass Extinctions in the Earth History. Mass Extinctions. Check . http://en.wikipedia.org/wiki/Impact_event. http://en.wikipedia.org/wiki/Mass_extinction. The struggle for life on earth. Mass Extinction - Definition. A significant proportion of species become extinct (between 30% and 95%) . The extinctions operate across a wide range of environments and . Brian O. ’. Meara. EEB464 Fall . 2015. Tucson Botanical Gardens. Learning outcomes:. Get a deep perspective on time. Understand major events in earth history. Generate hypotheses regarding what happens after mass extinctions. Overview. Extinctions are as important in the history of life as are the evolution of new species. Explaining extinctions is just as challenging a scientific question as explaining the evolution of new species. Penn State’s Sustainability Institute. Curator of . The Field Guide to Teaching Sustainability. Email: pdb118@psu.edu. Twitter: @. pdbuckland. Resolved: Climate Change is NOT a Crisis. Field Guide to Teaching Sustainability. Pedro J Marenco. Bryn Mawr College Department of Geology. End . Cretaceous . Mass Extinction. End Permian Mass Extinction. The Big 5 Mass Extinctions. (modified from . Alroy. , 2010). End Permian. End Triassic. The Sixth Mass Extinction. Essential Questions. What is extinction?. Which species have become extinct in modern times? . What are the characteristics of past mass extinctions? . How do modern extinction rates compare with natural (background) rates?. The sixth . m. ass . e. xtinction. Objectives. Define . extinction.. Give examples of (1) past mass extinctions (2) and recent species . extinctions.. Compare current extinction rates with background extinction . Objectives:. Define the terms . extinction. , . extirpation. and . mass extinction. .. Contrast background extinction rates and periods of mass extinction.. Evaluate the primary causes of biodiversity loss.. Penn State’s Sustainability Institute. Curator of . The Field Guide to Teaching Sustainability. Email: pdb118@psu.edu. Twitter: @. pdbuckland. Resolved: Climate Change is NOT a Crisis. Field Guide to Teaching Sustainability. ASTR 1420. Lecture . 9. Sections : 4.6, 6.4, 11.3. Mass Extinctions in the Earth History. Mass extinction . (a.k.a. extinction event) : is a sharp decrease in the number of species in a relatively short period of time.. Opportunities and. Adaptive Radiations. Overview. Extinctions. Adaptive Radiations—New Niches. Stem mammals survived and experience adaptive radiation.. Evolution of birds, feathers, flight, and flightlessness.. Pangaea, the interior of which was desert.. Low atmospheric oxygen (~12% recovering to ~16%). No early coal deposits; recovery took ~30 MY. Atmospheric CO. 2. 6X pre-industrial levels. Mean global temperature 3. Essential Questions. What is extinction?. Which species have become extinct in modern times? . What are the characteristics of past mass extinctions? . How do modern extinction rates compare with natural (background) rates?.