Staff Profile
Emmett Duffy Photo


Emmett Duffy is Director of the Smithsonian’s Tennenbaum Marine Observatories Network, which coordinates the developing MarineGEO program. MarineGEO is building a worldwide partnership to administer an annual health exam for coastal marine life: documenting how and why coastal sea life is changing, and how that change affects resilience of the marine ecosystems humans depend on. The research focuses on biological diversity as the heart of healthy marine ecosystems and how they respond together to global change. Duffy is a marine biologist who has worked in seagrass and coral reef ecosystems around the world. He has contributed to scientific syntheses linking biodiversity to ecosystem health, the US National Climate Assessment, and visioning for development of an international Marine Biodiversity Observation Network. He was awarded an Aldo Leopold Leadership Fellowship in 2006, Japan’s inaugural Kobe Prize in Marine Biology in 2011, and a Virginia Outstanding Faculty award in 2013. Duffy came to the Smithsonian in 2013 after 19 years at the College of William and Mary’s Virginia Institute of Marine Science. 

Publications (Google Scholar)


  • Stuart-Smith, Rick, Edgar, Graham J., Barrett, Neville S., Bates, Amanda E., Baker, Susan C., Bax, Nicholas J., Becerro, Mikel A., Berkhout, Just, Blanchard, Julia L., Brock, Daniel J., Clark, Graeme F., Cooper, Antonia T., Davis, Tom R., Day, Paul B., Duffy, James Emmett, Holmes, Thomas H., Howe, Steffan A., Jordan, Alan, Kininmonth, Stuart, Knott, Nathan A., Lefcheck, Jonathan S., Ling, Scott D., Parr, Amanda, Strain, Elisabeth, Sweatman, Hugh, et al. (2017). Assessing National Biodiversity Trends for Rocky and Coral Reefs through the Integration of Citizen Science and Scientific Monitoring Programs. Bioscience, 67 (2) , 134-146.
  • Duffy, James Emmett, Lefcheck, Jonathan S., Stuart-Smith, Rick D., Navarrete, Sergio A. and Edgar, Graham J. (2016). Biodiversity enhances reef fish biomass and resistance to climate change . Proceedings of the National Academy of Sciences of the United States of America, 113 (22) , 6230-6235.
  • Naeem, Shahid, Chazdon, Robin, Duffy, James Emmett, Prager, Case and Worm, Boris. (2016). Biodiversity and human well-being: an essential link for sustainable development. Proceedings of the Royal Society B: Biological Sciences, 283 (1844)
  • Chak, Solomon T. C., Rubenstein, Dustin R. and Duffy, James Emmett. (2015). Social Control of Reproduction and Breeding Monopolization in the Eusocial Snapping Shrimp Synalpheus elizabethae . American Naturalist, 186 (5) , 660-668.
  • Chak, Solomon Tin Chi, Duffy, James Emmett and Rubenstein, Dustin R. (2015). Reproductive skew drives patterns of sexual dimorphism in sponge-dwelling snapping shrimps. Proceedings of the Royal Society B: Biological Sciences, 282 (1809)
  • Duffy, James Emmett, Reynolds, Pamela L., Boström, Christoffer, Coyer, James A., Cusson, Mathieu, Donadi, Serena, Douglass, James G., Eklöf, Johan S., Engelen, Aschwin H., Eriksson, Britas Klemens, Fredriksen, Stein, Gamfeldt, Lars, Gustafsson, Camilla, Hoarau, Galice, Hori, Masakazu, Hovel, Kevin, Iken, Katrin, Lefcheck, Jonathan S., Moksnes, Per-Olav, Nakaoka, Masahiro, O'Connor, Mary I., Olsen, Jeanine L., Richardson, J. P., Ruesink, Jennifer L., Sotka, Erik E., et al. (2015). Biodiversity mediates top-down control in eelgrass ecosystems: a global comparative-experimental approach. Ecology Letters, 18 (7) , 696-705.
  • Duffy, James Emmett, Ziegler, Shelby L., Campbell, Justin E., Bippus, Paige M. and Lefcheck, Jonathan S. (2015). Squidpops: A Simple Tool to Crowdsource a Global Map of Marine Predation Intensity . PloS One, 10 (11) , 1-17.
  • Gamfeldt, Lars, Lefcheck, Jonathan S., Byrnes, Jarrett E. K., Cardinale, Bradley J., Duffy, James Emmett and Griffin, John N. (2015). Marine biodiversity and ecosystem functioning: what's known and what's next?. Oikos, 124 (3) , 252-265.
  • Lefcheck, Jonathan S., Byrnes, Jarrett E. K., Isbell, Forest, Gamfeldt, Lars, Griffin, John N., Eisenhauer, Nico, Hensel, Marc J. S., Hector, Andy, Cardinale, Bradley J. and Duffy, James Emmett. (2015). Biodiversity enhances ecosystem multifunctionality across trophic levels and habitats . Nature Communications, 6
  • Stuart-Smith, Rick, Bates, Amanda E., Lefcheck, Jonathan S., Duffy, James Emmett, Baker, Susan C., Thomson, Russell J., Stuart-Smith, Jemina, Hill, Nicole A., Kininmonth, Stuart J., Airoldi, Laura, Becerro, Mikel A., Campbell, Stuart J., Dawson, Terence P., Navarrete, Sergio A., Soler, German, Strain, Elisabeth M. A., Willis, Trevor J. and Edgar, Graham J. (2015). The potential of trait-based approaches to contribute to marine conservation. Marine Policy, 51 , 148-150.
  • Howard, Jennifer, Babij, Eleanora, Griffis, Roger, Helmuth, Brian, Himes-Cornell, Amber, Niemier, Paul, Orbach, Michael, Petes, Laura, Allen, Stewart, Auad, Guillermo, Auer, Carol, Beard, Russell, Boatman, Mary, Bond, Nicholas, Boyer, Timothy, Brown, David, Clay, Patricia, Crane, Katherine, Cross, Scott, Dalton, Michael, Diamond, Jordan, Diaz, Robert, Dortch, Quay, Duffy, James Emmett, Fauquier, Deborah, et al. (2013). Oceans and Marine Resources in a Changing Climate. Oceanography and Marine Biology Annual Review, 51 , 71-192.
  • Ruckelshaus, M., Doney, S. C., Galindo, H. M., Barry, J. P., Chan, F., Duffy, James Emmett, English, C. A., Gaines, S. D., Grebmeier, J. M., Hollowed, A. B., Knowlton, Nancy, Polovina, Jeffrey J., Rabalais, N. N., Sydeman, W. J. and Talley, L. D. (2013). Securing ocean benefits for society in the face of climate change. Marine Policy, 40 , 154-159.
  • Doney, Scott C., Ruckelshaus, Mary, Duffy, James Emmett, Barry, James, Chan, Francis, English, Chad A., Hines, Heather M., Grebmeier, Jacqueline M., Hollowed, Anne B., Knowlton, Nancy, Polovina, Jeffrey J., Rabalais, Nancy N., Sydeman, William J. and Talley, Lynne D. (2012). Climate Change Impacts on Marine Ecosystems. Annual Review of Marine Science, 4 , 11-37.
  • Hultgren, Kristin M. and Duffy, James Emmett. (2012). Phylogenetic community ecology and the role of social dominance in sponge-dwelling shrimp. Ecology Letters, 15 (7) , 704-713.
  • Douglass, James G., Duffy, James Emmett and Canuel, Elizabeth A. (2011). Food Web Structure in a Chesapeake Bay Eelgrass Bed as Determined through Gut Contents and 13C and 15NIsotope Analysis. Estuaries and Coasts, 34 (4) , 701-711.