[Eoas-seminar] Oceanography Defense - Christian Fender - Feb. 25, 1:00

[eoas-seminar at lists.fsu.edu]

Oceanography Ph.D. Defense

Christian Fender
 Biological Oceanography
Major Professor: Mike Stukel

Time and Date: 1:00 PM on Feb 25, 2025
Location: EOAS 2061

TITLE:  Visualizing the vacuum: Microscopic insights into salp feeding and ecology

ABSTRACT: Salps are a group of pelagic tunicates with widespread distributions and the potential to strongly impact ecosystem dynamics through their rapid reproduction, carbon export, and filtration rates. Like most filter feeders, they are considered to be nonselective in their feeding such that different species are sometimes considered ecologically equivalent. However, recent reports of differences in the proportions of prey types in salp diets compared to prey availability have challenged this paradigm. Here we investigate the feeding habits, preferences, and their implications for 7 species from the Southwest Pacific east of New Zealand: Salpa thompsoni, Thetys vagina, Thalia democratica, Salpa fusiformis, Ihlea magalhanica, Soestia zonaria, and Pegea confoederata. Our dataset encompasses 58 individuals representing a variety of sizes and both life stages, allowing us to examine how they impact feeding. Scanning electron microscopy was used to examine the gut contents of 58 individuals, which were then compared to water column plankton communities characterized via epifluorescence microscopy, FlowCam, and flow cytometry.  We compare the size and taxon-selectivity of these taxa and also explore the ecosystem impacts of a salp bloom and their implications for fisheries production.

For those who cannot attend in person, a zoom link is provided below:

Michael Stukel is inviting you to a scheduled Zoom meeting.

Topic: Christian Fender Ph.D. Defense
Time: Feb 25, 2025 01:00 PM Eastern Time (US and Canada)
Join Zoom Meeting
https://fsu.zoom.us/j/98482770651

Meeting ID: 984 8277 0651

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