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Evolutionary dynamics of foraminiferan size during mass extinction, recovery, and background intervals

This research focuses on the size evolution of foraminifera from the Late Permian through the Early Jurassic. Foraminifera are one of the most diverse and widespread groups of organisms and investigating their size evolution during this time interval allows us to gain a better understanding of the driving factors of size change during both the Permian-Triassic and Triassic-Jurassic mass extinctions, as well as the recovery period after each. We constructed a database of global fossil occurances from the literature and analyzed the size distribution of foraminifera in order to better understand the three components of size evolution, size-selective extinction, size-selective origination, and within-lineage size change.


The principal advisor for the project was Jonathan L. Payne: Stanford Paleobiology Research Group
The second reader was Steve C. Wang


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