Master of Science (MS)
First Advisor's Name
Joel C. Trexler
First Advisor's Committee Title
Second Advisor's Name
Second Advisor's Committee Title
Third Advisor's Name
Third Advisor's Committee Title
Wetlands, Food Webs, Algae, Fatty Acids, Sailfin Molly, Eastern Mosquitofish, Riverine Grass Shrimp, Everglades, stoichiometry, phosphorus
Date of Defense
Establishing historical water velocities is a goal of Everglades restoration because of their role maintaining landscape topographic relief. However, flows may also change the trophic state of marshes by phosphorus loading. I used fatty acid (FA) and stoichiometric data to quantify how increased sheet flow altered the relative heterotrophic and autotrophic contributions to aquatic consumers in a field experiment that introduced flowing water to an Everglades marsh in November, 2014. Algal taxonomic composition was different between pre-flow and flow sampling, marked by increases in the nutrient exploiting Mougeotia species (green algae) during flow sampling. Dietary tracer FAs in consumers reflected changes in algal resources, including an increase in green algae-derived and a decrease in bacteria-derived FAs. These food web responses indicate that establishing historic water velocity in degraded wetlands can shift the origins of organic matter from a more detrital to more algal supported web.
Bornhoeft, Sarah C., "Influence of Experimental Sheet Flow on Aquatic Foods Webs of the Central Everglades" (2016). FIU Electronic Theses and Dissertations. 2562.