Eckman, J. E.. Office of Naval Research, eckmanj@onr.navy.mil
Duggins, D. E.. Friday Harbor Labs, University of Washington, duggins@fhl.washington.edu
Siddon, C. C.. Brown University, Christopher_Siddon@brown.edu

 
INFLUENCE OF FLUID FORCES ON MORTALITY OF SUB-SURFACE CANOPY (UNDERSTORY) KELPS
 
Rates of mortality of new recruits of three species of sub-surface canopy (understory) kelps were measured at six subtidal sites in the San Juan Archipelago, Washington. Simultaneously, in situ instrument packages were used to measure current strength, and frequency and intensity of wave height and velocity, within each plant population at biologically relevant heights above the bottom. Mortality rates of all three kelp species varied among sites in patterns suggesting that storm waves or the interaction of storm wave energy with tidal currents strongly affects plant survival. These relationships held despite morphometric evidence that plants inhabiting higher energy regimes exhibit greater capacities to resist fluid forces.
 
Day: Wednesday, Feb. 3
Time: Poster
Location: Sweeney Center
 
Code: SS03WE1396S