Date of Award


Degree Type


Degree Name


Degree Program

Earth & Environmental Science


Earth and Environmental Sciences

Major Professor

O'Connell, Martin

Second Advisor

Foster-Martinez, Madeline

Third Advisor

Smith, Patrick


Bayou St. John is a degraded waterway located within the City of New Orleans. The Bayou, which is disconnected from Lake Pontchartrain by floodgates, has undergone restoration efforts to improve connectivity through frequent floodgate openings and marsh habitat restoration outside of the floodgates. To assess possible responses of local fish assemblages to these restoration efforts, I analyzed long-term fish assemblage data from three sites located inside of the floodgates and one site located at the restored marsh outside of the floodgates. Two sites inside of the floodgates experienced significant changes in assemblages between the pre-opening period (2006-2012) and post-opening period (Allen Toussaint Bridge, R = 0.125, p < 0.01 and Mirabeau Bridge, R = 0.051, p < 0.01). The restored marsh site also experienced significant changes in assemblages over time (BSJ Marsh, R = 0.421, p < 0.01), but these changes appeared due to a 2016 Bonnet Carré Spillway opening.


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