University of Oregon

Cynthia D. Trowbridge

Senior Research Associate


B.A. Biological Sciences, Cornell University
Ph.D. Zoology, Oregon State University


Mail:   OIMB, P.O. Box 5389, Charleston, OR 97420 (institutional)
P.O. Box 1995, Newport, OR 97365 (home)
Phone:   (541) 961-0643
Fax:   (541) 888-3250

Graduate Students

Given the nature of my OIMB appointment, I cannot accept MS or PhD students.

Selected Publications

Journal Papers

Trowbridge, C.D. 1991. Diet specialization limits herbivorous sea slugs’ capacity to switch among food species. Ecology 72: 1880-1888.

Trowbridge, C.D. 1991. Group membership facilitates feeding of the herbivorous sea slug Placida dendritica. Ecology 72: 2193-2203.

Trowbridge, C.D. & Todd, C.D. 2001 . Host-plant changes of marine specialist herbivores: ascoglossan sea slugs on the introduced Codium fragile. Ecol. Monogr. 71: 219-243.

Trowbridge, C.D., Hirano, Y.J., & Hirano, Y.M. 2010 [for 2008]. Sacoglossan opisthobranchs on northwestern Pacific shores: Stiliger berghi Baba, 1937, and Elysia sp. on filamentous red algae. Veliger 51: 43-62.

Trowbridge, C.D., Hirano, Y.M., Hirano, Y.J., Nishida, K., & Sudo, K. 2011. North-west Pacific sacoglossan guild associated with filamentous green algae (Family Cladophoraceae and Family Boodleaceae). Mar. Biodivers. Rec. doi:10.1017/S1755267211000170.

Trowbridge, C.D., Hirano, Y.M., Hirano, Y.J., Sudo, K., Shimadu, Y., Watanabe, T., Yorifuji, M., Maeda, T., Anetai, Y., & Kumagai, K. 2010. Subtropical sacoglossans in Okinawa—at “special risk” or “predictably rare”? Am. Malacol. Bull. 28: 167-182.

Books & DVDs

Little, C. & Trowbridge, C.D. 2013. A brief introduction to the organisms that live in Lough Hyne (and what the scientists know about them). Pp. 162-181 in: Lough Hyne: From Pre-History to the Present. Kearney, T. Macalla Publishing, Skibbereen, Ireland.

Little, C., Williams, G.A., & Trowbridge, C.D. 2009. The Biology of Rocky Shores, 2nd Edition, Oxford University Press,

Trowbridge, C.D. 2006. A global proliferation of non-native marine and brackish macroalgae. Invited 91-page chapter in: World Seaweed Resources—An Authoritative Reference System. DVD-ROM, version 1.0. Critchley, A.T., Ohno, M., & Largo, D.B. (eds.). ETI Bioinformatics, Amsterdam.  


Rocky shorebook4bc641f090

Lough Hyne book 2013

Review Papers

Trowbridge, C.D. 1998. Ecology of the green macroalga Codium fragile (Suringar) Hariot 1889: invasive and non-invasive subspecies. Oceanogr. Mar. Biol. Ann. Rev. 36: 1-64.

Trowbridge, C.D. 1999. An assessment of the potential spread and options for control of the introduced green macroalga Codium fragile ssp. tomentosoides on Australian shores. Consultancy report, CSIRO/Centre for Research on Introduced Marine Pests: Hobart.

Trowbridge, C.D. 2002. Northeastern Pacific sacoglossan opisthobranchs: natural history review, bibliography, and prospectus. Veliger 45: 1-24.

Trowbridge, C.D., Hirano, Y.M., & Hirano, Y.J. 2011. Inventory of Japanese sacoglossan opisthobranchs: Historical review, current records, and unresolved issues. Am. Malacol. Bull. 29: 1-22.


Cynthia D. Trowbridge has been fascinated with tidepools, beach drift, and marine life for the past forty years. Her educational background includes a B.A. from Cornell University and a Ph.D. from Oregon State University. She has conducted ecological research on seaweeds and invertebrates in nine countries, including her current work in the UK, Ireland, and Japan. Her specialties include the feeding ecology of herbivorous sea slugs (sacoglossans) and the problem of invasive seaweeds.  She teaches marine-oriented field courses for university students, state park staff, and the general public. Cynthia is the currently serving as an Associate Editor of the Journal of Marine Biology of the U.K. and Marine Biodiversity Records.


Ascidians at Lough Hyne Marine Reserve


Additional Information


Public Outreach


Professional Service

International Research Experience for Students (IRES):

In the news: Press articles

  • sc0004 Southern Star 29 Sep 2012 Community section p 25



Rocky shore zonation (Tasmania)


Corallimorphs in Irish tidal rapids


Boring sponge in Lough Hyne, Ireland

Lough Hyne, Ireland

Lightbulb ascidians in Ireland