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David Fox Contact Info: Email: geology@umn.edu Website: http://www.geo.umn.edu Professor Fox helped to start a new open access journal 1997 that is accessible to everyone online called Paleontological Electronica Freshman Seminar: Ice Age Extinctions, Environmental Change, and Humans Historical Geology Creativity

BASIC INFO Department:Geology & Geophysics, Pillsbury Hall, Twin Cities Campus Main focus:Paleoecology and paleoclimatology First I investigates the chemical isotopes in ancient animal teeth and bones, namely Carbon, Nitrogen, and Oxygen. These isotopes give off “paleoclimate signals� that tells us what the environment was like 40 million years ago. By tracking those signals through time, patterns emerge in the ecosystem of herbivore animals due to a changing climate. My second focus is exploring how species evolved by creating computer simulated evolutionary histories. The anatomical “gaps� that exist in the evolution of different species can be filled with stratigraphic data. In other words, geologic time-keeping is applied. On-going simulation studies help visualize the evolutionary tree of life. The third focus of my research is on the ecological biogeography of animals. The body size and dietary categories of modern mammals shows striking correlations with climatic variables. Continuing work will include comparisons between continents with quite different faunal and climatic histories over the last several million years.

Angielczyk, K. and Fox, D.L., in press. A new role for stratigraphic data in phylogeny reconstruction? Exploring an alternative use of stratigraphic data in phylogeny reconstruction. Paleobiology. Geology Librarian wrote… Congrats on your latest article in Paleobiology. If your students need help finding the full-text version online they should take a look at GeoRef, a geology literature database.. IM me umngeolib Treatise in Geophysics wrote . . . I’m new to the library, and fully-searchable online. My 11 volumes of electronic encyclopedic information contain information on Geology, Geophysics, and Earth Evolution... Goldy the Gopher wrote . . . I love the library!

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Geology & Geophysics Pillsbury Hall, Twin Cities Campus Paleoclimatology. My research has three broad focuses.  The first investigates ancient animal teeth and bones; they contain biogenic material in the form of chemical isotopes, namely Carbon, Nitrogen, and Oxygen. These isotopes give off “paleoclimate signals� that tells us what the environment was like 40 million years ago. By measuring isotopes from ancient tusks of now extinct North American mammoths and tracking those signals through time in the bones and teeth of modern North American deer, patterns emerge of changing climate affecting the ecosystem of herbivore animals. A second focus is exploring the order of how species evolved. Through the use of computer simulated evolutionary histories, the anotomical “gaps� that exist in the evolution of different species can be filled with stratigraphic data. In other words, geologic time-keeping is applied. This type of data analysis, called stratocladistics, is still a controversial method. On-going simulation studies help toward visualizing evolutionary tree of life. The third focus of my research is on the ecological biogeography of modern North American mammals in relation to the spatial variation in climate.  The frequency of modern mammal species in body size and dietary categories shows striking correlations with climatic varaiables. Continuing work on the biogeography of mammals will include comparisons between the modern mammalian faunas of North American and Africa, continents with quite different faunal and climatic histories over the last several million years.

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