I am interested in the food we eat, where it comes from, and how our diets have been shaped by changes in environment, climate and human activities through time. In a world where the environment is increasingly under duress, I am also interested in how animals adapt their foraging strategies to the changing conditions. To investigate these research questions, I use biochemical and naturally occurring isotope markers on geological, biological and archaeological samples. Because stable isotope ratios of our samples are determined by multi-facetted processes (i.e. geological, chemical, ecological, and biological), my work has a strong interdisciplinary focus. I currently work on the following main topics:
Yiming Wang received her BSc in Geology
from Beijing University (PKU), China. She obtained MSc and PhD in Department of Geology and Geophysics in University of Alaska Fairbanks. For her MSc, work,
Yiming studied the vegetation changes in Central Mongolia using both
palynological records and remote sensing tools. During her PhD work, she primarily
focused on developing a new climate proxy of δ18O and δD of chironomid (known
as midges) chitin preserved in lake sediments for reconstructing δ18O and δD
lake water for high latitude areas by conducting both laboratory growth experiment
and reconstruct the climate and environment using lake sediment cores.
After her PhD, Yiming worked as a postdoc at Kiel University, where she studied past climate and environmental changes, and land-ocean climate interactions in Southeast Africa and Southern Asia. To reconstruct past rainfall and vegetation changes, she developed and applied stable isotope of terrestrial leaf wax biomarkers preserved in marine sediments. She has also worked extensively with provenance and sea surface temperature biomarkers (e.g. alkenone, foraminiferal Mg/Ca) to reconstruct paleoceanographic conditions.
Yiming has used her extensive knowledge of biomolecular isotope markers to apply amino acid 13C fingerprinting for tracing the geographical origins and food sources of wild and farmed salmon, an approach that holds great potential for seafood authentication.
Wang, Y. V., Wan, A. H. L., Krogdahl, Å., Johnson, M. P., Larsen, T. (2019). 13C values of glycolytic amino acids reflect carbohydrate utilization in farmed Atlantic salmon, PeerJ 7:e7701 http://doi.org/10.7717/peerj.7701
Wang, Y.V., Wan, A. H. L., Jock, E-J., Andersen, N., Winter-Schuh, C., Larsen, T. (2018). Know your fish: A compound-specific isotope approach for tracing wild and farmed salmon. Food Chemistry 256: 380-389
Larsen, T., Ventura, M., Maraldo, K., Triadó-Margarit, X., Casamayor, E., Wang, Y. V., Andersen, N., O’Brien, D.M. (2016). The dominant detritus-feeding invertebrate in arctic peat soils derives its essential amino acids from gut symbionts. Journal of Animal Ecology 85(5): 1275-1285.
Larsen, T., Bach, L., Salvatteci, R., Wang, Y. V., Ventura, M., Andersen, N., McCarthy, M. D. (2015) Assessing the potential of amino acid 13C patterns as a carbon source tracer in marine sediments: effects of algal growth conditions and sedimentary diagenesis. Biogeochemistry, 12(16), 4879-4992.
Schneider, B., Schneider, R.R., Wang, Y. V., Khon, V. (2015) “Model-data synthesis of Monsoon amplitudes for the Holocene and Eemian”, in Schulz, M and Paul, A (eds), Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC), Springer Briefs in Earth System Sciences, DOI 10/ 1007/978-3-319-00693-2_15.
Khon, V., Wang, Y. V., Krebs-Kanzow, U., Kaplan, J., Schneider, B., Schneider, R.R. (2014) Climate and CO2 effects on the vegetation of southern tropical Africa over the last 37,000 years. Earth Planetary Science Letter. 403:407-417.
Wang, Y.V., Ludec, G., Regenberg, M, Andersen, N., Larsen, T., Blanz, T., Schneider, R.R. (2013) Northern and southern hemisphere controls on seasonal sea surface temperatures in the Indian Ocean during the last deglaciation. Paleoceanography. 28(4): 619-632.
Wang, Y.V., Larsen, T., Ludec, G., Andersen, N., Blanz, T., Schneider, R.R. (2013) What does leaf wax δD from a mixed C4/C3 vegetation region tell us? Geochimica et Cosmochimica Acta. 111: 128-139.
Glessmer, M., Wang, Y.V., Kontak, R. (2012) Networking skills: tools for women in the Earth Sciences to build community and succeed. EOS. Vol. 93, No. 41: 406.
Heiri, O., Wooller, M.J., van Hardenbroek, M., Wang, Y.V. (2009) Stable isotopes in Chintinous fossils of aquatic invertebrates. PAGES news. Vol. 17, No.3:100-102
Wang, Y.V., O’Brien, D., Francis, D., Wooller, M. J. (2009) The influence of diet and water on the stable oxygen and hydrogen isotope composition of chironomids (Chironomidae: Diptera) with paleoecological implications. Oecologia.160:225-233.
Wang, Y., Francis, D., O’Brien, D., Wooller, M. J. (2008) A protocol for preparing subfossil Chironomid head capsules (Diptera: Chironomidae) for stable isotope analysis in paleoclimate reconstruction and considerations of contamination sources. J. Paleolimnology, 40:771-781.
Wooller, MJ, Wang, Y., Axford, Y. (2008) A multiple stable isotope record of Late Quaternary limnological changes and chironomid paleoecology from northeastern Iceland. J. Paleolimnology, 40:63-77.
Wang, Y., and Wooller, M.J. (2006) The stable isotopic (C and N) composition of modern plants and lichens from northern Iceland: with paleoenvironmental implications. Jokull, 56: 27-37.
Wang Y, Larsen T. (2018) Stable isotope fingerprinting of amino acids: a novel approach for tracing wild and farmed salmon. G.I.T: Laboratory Journal 3/2018. https://www.laboratory-journal.com/science/food/stable-isotope-fingerprinting-amino-acids