Paper No. 3
Presentation Time: 9:00 AM-6:30 PM
THE DISTRIBUTION AND ECOLOGY OF LIVING (STAINED) BENTHIC FORAMINIFERA ACROSS AN OXYGEN MINIMUM ZONE IN THE SOUTHERN CALIFORNIA BIGHT
Multicore samples collected within an oxygen minimum zone off the coast of California provide the opportunity to assess changes in benthic foraminiferal abundances and assemblages along a depth transect (360-3000m) with varying oxygen availability. In this study, coarse-grained sediments were targeted. Sample grain size averages range from 23.9-105.7 µm at the examined locations. Within the oxygen minimum zone in the Southern California Bight, temperatures range from 2.9oC to 7.1oC, and bottom water oxygen values range from 0.38 ml/L to 3.63 ml/L at sample locations. Living (Rose Bengal stained) specimens of the >150 µm size fraction were examined from the 0-2 cm interval. Preliminary results show abundant taxa to include Uvigerina spp., Cassidulina spp., and Bulimina spp. in the upper 0-1 cm portion of cores with an increase in Globobulimina spp. down core.