Patrick Ewanchuk, Ph.D.

Research interests

Population and community ecology of marine plants, algae and invertebrates

My research program uses both descriptive ecology and manipulative experiments to understand the organization and dynamics of coastal plant, algal and animal communities. Specifically, my work on New England shores has focuses on (1) how abiotic and biotic factors influence zonation in coastal salt marshes and (2) how direct and indirect interactions between crab predators and consumers can influence the abundance of foundation species (barnacles and fucoid algae) on New England rocky shores.

Research projects

The relative importance of Density vs Trait -mediated indirect effects in a rocky intertidal food web
The maintenance of New England salt marsh forb pannes
Understanding the impact of nutrient and hydrological changes on New England salt marsh plant communities

Education

1987-1991 B.S. (Biology) University of British Columbia, Vancouver, Canada

1992-1995 M.S. (Ecology) San Diego State University

Research: Population Growth of Eelgrass (Zostera marina L.): The Relative
Importance of Sexual versus Asexual Reproduction

1997-2003 Ph.D. (Ecology and Evolutionary Biology) Brown University

Research: The Ecology of Northern New England Salt Marshes Plant Communities

2003-2004 Postdoctoral researcher Northeastern University

Research: The Role of Trait-mediated Indirect Interaction in Structuring Marine Intertidal Communities

Select research publications

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Coastal Salt Marshes:

Ewanchuk, P. J. and M. D. Bertness. 2004. The role of waterlogging in maintaining forb panes in Northern New England Salt Marshes. Ecology 85: 1568-1574.

Ewanchuk, P. J., and M. D. Bertness.2004. Structure and Organization of a northern New England salt marsh plant community. J. Ecology 92: 72-85.

Ewanchuk, P. J. and M. D. Bertness. 2003. Recovery of a Northern New England salt marsh plant community from winter icing. Oecologia 136:616-626.

Bertness, M. D. and P. J. Ewanchuk. 2002. Latitudinal and climate driven variation in the strength of salt marsh plant competition and facilitation. Oecologia 132: 392-401.

Bertness M. D., P. J. Ewanchuk, and B. R. Silliman. 2002. Anthropogenic modification of New England salt marsh landscapes. Proceedings of the National Academy of Science. 99: 1395-1398.

Rocky Intertidal:

Trussell, G. C., P. J. Ewanchuk, and M. D. Bertness. 2003. Trait-mediated effects in rocky intertidal food chains: Predator risk cues alter prey feeding rates. Ecology 84: 629-640.

Trussell, G. C., P. J. Ewanchuk, and M. D. Bertness. 2002. Field evidence of trait-mediated indirect interactions in a rocky intertidal food web. Ecology Letters 5: 241-245.

Bertness, M. D., G. C Trussell, P. J. Ewanchuk, and B. R. Silliman. 2002. Do alternate stable community states exist in the Gulf of Maine rocky intertidal zone? Ecology 83: 3434-3448.

Seagrass Communities:

Ebert, T. A., S. L Williams and P. J. Ewanchuk. 2002. Mortality estimates from age distributions: Critique of a method used to study seagrass dynamics. Limnol. Oceanogr. 47: 600-603.

Ewanchuk, P. J., and S. L. Williams. 1996. Survival and re-establishment of vegetative fragmentation of eelgrass (Zostera marina L.). Canadian Journal of Botany 74: 1584-1590.

Ewanchuk, P. J. 1995. Population growth of eelgrass (Zostera marina L.): The relative importance of sexual versus asexual reproduction. MS Thesis. San Diego State University. pp. 149.

	Patrick J. Ewanchuk, Ph.D. Assistant Professor
	Biology Department Providence College Providence, RI 02918
	Office: Alburtus Magnus 132 Phone: (401) 865-2394 FAX: (401) 865-1438 Email: ewanchuk@providence.edu Link to My Lab Homepage

Office: Alburtus Magnus 132 Phone: (401) 865-2394 FAX: (401) 865-1438 Email: ewanchuk@providence.edu

Education

1987-1991 B.S. (Biology) University of British Columbia, Vancouver, Canada

Select research publications

Office: Alburtus Magnus 132
Phone: (401) 865-2394
FAX: (401) 865-1438
Email: ewanchuk@providence.edu