SS3.15 Physical Forcing and Pelagic-Benthic Interactions in Aquatic Systems
Date: Thursday, June 13, 2002
Location: Poster Session - VCC
 
BatesA, University of Victoria, Victoria, CANADA, abates@uvic.ca
Tunnicliffe, V, , University of Victoria, Victoria, CANADA, verenat@uvic.ca
 
DIFFERENCES IN THE POPULATION CHARACTERISTICS AND FEEDING STRATEGIES OF A HYDROTHERMAL VENT LIMPET WITH PROXIMITY TO FLUID FLOW.
image
Hydrothermal vents emit heated seawater, which is low in oxygen and rich in hydrogen sulfide and other minerals. The fluid chemistry at vents varies in space and time, as mixing with ambient seawater creates fluctuating temperature and chemical gradients. This variability creates a mosaic of shifting microhabitats. The limpet, (Lepetodrilus fucensis), is numerically dominant across a variety of microhabitats on the Juan de Fuca Ridge, with densities up to 10 animals/cm2. However, little is known about this limpet’s biology. Although evidence suggests (L. fucensis) is capable of multiple feeding strategies, it is unknown if the limpet switches feeding strategy in different microhabitats. This work describes (L. fucensis) population characteristics and feeding strategy as a basis for understanding its remarkable success. Preliminary results, based on samples taken directly in emergent vent flow and 0.5m from the flow, indicate that (L. fucensis) population characteristics and feeding strategy change with proximity to fluid flow. Additional results will be discussed.