Event Title

Seasonality in Vibrio Bacteria Population Structure- a Practical Application of the Lotka-Volterra Competition Model.

Mentor 1

Charles

Mentor 2

Gabriella Pinter

Mentor 3

Istvan Lauko

Location

Union 240B

Start Date

24-4-2015 10:00 AM

Description

Seasonality in Vibrio Bacteria Population Structure- a Practical Application of the Lotka-Volterra Competition Model. Departments of Biological Sciences and Mathematics, University of Wisconsin-Milwaukee, WI. The bioluminescent bacteria Vibrio harveyi and V. chagasii, are found in the Gulf Coast of Florida where their relative abundance varies between winter and summer. This study aims at examining the hypothesis that seasonal variations in the relative abundance of Vibrio harveyi and V. chagasii populations off the coast of Florida are due to changes in growth rate and competitive ability caused by seasonal variations in temperature. We conducted growth experiments with the two bacteria populations at six different temperatures to identify temperature dependent growth rates. Time series cell-count population data were also collected in competition experiments at the same temperature range. The experiments conducted qualitatively exhibit the behavior observed in nature. Experimental results are used to parameterize a Lotka-Volterra competition model to test the presence of factors influencing the competitive dynamics additional to the individual temperature dependent growth parameters.

This document is currently not available here.

Share

COinS
 
Apr 24th, 10:00 AM

Seasonality in Vibrio Bacteria Population Structure- a Practical Application of the Lotka-Volterra Competition Model.

Union 240B

Seasonality in Vibrio Bacteria Population Structure- a Practical Application of the Lotka-Volterra Competition Model. Departments of Biological Sciences and Mathematics, University of Wisconsin-Milwaukee, WI. The bioluminescent bacteria Vibrio harveyi and V. chagasii, are found in the Gulf Coast of Florida where their relative abundance varies between winter and summer. This study aims at examining the hypothesis that seasonal variations in the relative abundance of Vibrio harveyi and V. chagasii populations off the coast of Florida are due to changes in growth rate and competitive ability caused by seasonal variations in temperature. We conducted growth experiments with the two bacteria populations at six different temperatures to identify temperature dependent growth rates. Time series cell-count population data were also collected in competition experiments at the same temperature range. The experiments conducted qualitatively exhibit the behavior observed in nature. Experimental results are used to parameterize a Lotka-Volterra competition model to test the presence of factors influencing the competitive dynamics additional to the individual temperature dependent growth parameters.