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Rosalie Tostevin

Subjects: 
Earth Science

Roslie graduated from the University of Cambridge with an MSci in Natural Sciences in 2011, and completed her PhD at University College London in 2014. She has since worked as a postdoc at the University of Otago, New Zealand, and is currently a postdoc in the Earth Science department at the University of Oxford.

She is primarily interested in the interactions between life and the environment on the early Earth. Her current research uses experiments to determine how metals are scavenged during precipitation of the mineral greenalite, thought to be abundant in ancient sediments. This enables her to predict the availability of key micronutrients, such as Cu, Ni or Zn in ancient oceans, and explore impacts for early microbial life.

She has previously worked on tracking major shifts in marine oxygen levels using a variety of geochemical proxies. These redox shifts are hypothesised to have influenced the appearance and radiation of modern-like animal groups.

She has also worked on modern geochemical cycles, including the marine and terrestrial sulfur cycle. She is always interested in improving the proxy tools used in ancient sediments, and so has been involved in calibration studies and improving methodologies.

She is a lecturer at St Edmund Hall, and provides regular tutorials for students at the college. Her teaching covers sedimentology and geochemistry across all year groups. Specifically, she covers Earth surface processes, building a habitable planet, chemistry and geological time (First years); Wessex Basin, carbon cycle, generation of sediments, diagenesis and rocks to environments (second years); and climate (3rd years).

You can follow her on Twitter at @RosalieTostevin

Publications

Tostevin, R., He, T., Turchyn, A. V., Wood, R. A., Penny, A. M., Bowyer, F., Antler, G. & Shields, G. A. 2017. Constraints on the late Ediacaran sulfur cycle from carbonate associated sulfate. Precambrian Research

Penny, A. M., Wood, R. A., Zhuravlev,  A. Y., Curtis, A., Bowyer, F., Tostevin, R., 2017. Intraspecific variation in an Ediacaran skeletal metazoan: Namacalathus from the Nama Group, Namibia. Geobiology.

Tostevin, R., Wood, R.A., Shields, G.A., Poulton, S.W., Guilbaud, R., Bowyer, F., Penny, A.M., He, T., Curtis, A., Hoffmann, K.H. and Clarkson, M.O., 2016. Low-oxygen waters limited habitable space for early animals. Nature Communications, 7

Tostevin, R., Shields, G. A., Tarbuck, G. M., He, T., Clarkson, M. O., & Wood, R. A. (2016). Effective use of cerium anomalies as a redox proxy in carbonate-dominated marine settings. Chemical Geology, 438, 146-162

Tostevin, R., Craw, D., Van Hale, R., & Vaughan, M. (2016). Sources of environmental sulfur in the groundwater system, southern New Zealand. Applied Geochemistry, 70, 1-16

Wood, R.A., Poulton, S.W., Prave, A.R., Hoffmann, K.H., Clarkson, M.O., Guilbaud, R., Lyne, J.W., Tostevin, R., Bowyer, F., Penny, A.M. and Curtis, A., 2015. Dynamic redox conditions control late Ediacaran metazoan ecosystems in the Nama Group, Namibia. Precambrian Research, 261, pp.252-271.

Penny, A.M., Wood, R., Curtis, A., Bowyer, F., Tostevin, R. and Hoffman, K.H., 2014. Ediacaran metazoan reefs from the Nama Group, Namibia. Science, 344(6191), pp.1504-1506.

Tostevin, R., Turchyn, A.V., Farquhar, J., Johnston, D.T., Eldridge, D.L., Bishop, J.K. and McIlvin, M., 2014. Multiple sulfur isotope constraints on the modern sulfur cycle. Earth and Planetary Science Letters, 396, pp.14-21.