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Marine Biology & Oceanography
Short Communication
Short-Term Variation in the Abundance of Vibrio vulnificus and Vibrio parahaemolyticus in a Tidal Estuary
 
1JHT, Inc., NOAA/NCCOS Cooperative Oxford Lab, Oxford, MD 21654, USA Matt Rhodes1 2James M. Bennett High School, Salisbury, MD 21801, USA Hemalatha Bhaskaran2 and 3NOAA/NCCOS/Cooperative Oxford Lab, Oxford, MD 21654, USA John Jacobs3*
 
Corresponding author : John Jacobs, NOAA/NCCOS Cooperative Oxford Lab, 904 South Morris Street, Oxford, MD 21654, USA, Tel: 410-226-5193-135; Fax: 410-226-5925;
E-mail: john.jacobs@noaa.gov
 
Received: January 31, 2013 Accepted: March 29, 2013 Published: April 05, 2013
 
Citation: Rhodes M, Bhaskaran H, Jacobs J (2013) Short-Term Variation in the Abundance of Vibrio vulnificus and Vibrio parahaemolyticus in a Tidal Estuary. J Mar Biol Oceanogr 2:2. doi:10.4172/2324-8661.1000109
 
Abstract
 
We examined the influence of tide stage and depth on the abundance of Vibrio vulnificus and Vibrio parahaemolyticus in the Chesapeake Bay. Samples were collected every 3 hours following predicted tides at a fixed location over 3 separate days and Vibrio concentrations analyzed by qPCR. Multi-way Analysis of Variance suggest that sampling day explains the vast majority of the variance in abundance for both species (p<0.0001) with limited influence of tide and depth. The physio-chemical parameters that define a sampling day were further explored with environmental gradient analysis. Gradients in daily photosynthetic activity and turbidity (PC1) and temperature and salinity (PC2) explained 75% of the environmental variability, and 50% of Vibrio vulnificus abundance. However, these same gradients did not explain a significant proportion of variation in the abundance of Vibrio parahaemolyticus (P>0.05). These results suggest that within day variability is not as important as that associated with environmental changes over time, and further highlight the need for species specific and mechanistic approaches to the study of vibrio ecology.
 
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