Coyle, K. O.. Institute of Marine Science, coyle@ims.uaf.edu
Pinchuk, A. O.. Institute of Marine Science, ftaip1@aurora.alaska.edu

 
ZOOPLANKTON COMMUNITY STRUCTURE AT THE INNER FRONT OF THE SOUTHEASTERN BERING SEA DURING A TWO YEAR PERIOD OF CLIMATIC EXTREMES
 
Zooplankton distribution, community structure ,and seasonal and interannual variability were studied at the inner front of the southeastern Bering Sea. Comparisons were made of the zooplankton community structure in the southern and northern parts of Bristol Bay. Unusually warm water with intense stratification, low primary production and a coccolithophorid bloom were recorded in the summer of 1997. During the above unusual conditions, the zooplankton community was characterized by high abundances of Oithona similis, Pseudocalanus spp. and Acartia longiremis. Biomass was dominated by the larger Calanus marshallae, Sagitta elegans, and hydrozoans. In southern Bristol Bay, larval euphausiids were abundant both spring and fall, while in the northern area off Nunivak Island they were absent during fall. Multidimensional scaling revealed two communities, one on the stratified and one on mixed side of the structural front. Initial analysis of samples collected in the stormier summer of 1998 revealed few Calanus marshallae in the frontal region but considerable concentrations of juvenile euphausiids in northern and southern Bristol Bay. This research is part of a cooperative program involving University of Alaska Fairbanks, University of California Irvine, Pacific Marine Environmental Laboratory and University of New England.
 
Day: Monday, Feb. 1
Time: 04:00 - 04:15pm
Location: Hilton of Santa Fe
 
Code: SS14MO0400H