128 Recent Advances in Paleoclimatology/Paleooceanography (Posters)
Monday, 28 October 2013
9:00 AM - 6:30 PM
Hall D
THE DISTRIBUTION AND ECOLOGY OF LIVING (STAINED) BENTHIC FORAMINIFERA ACROSS AN OXYGEN MINIMUM ZONE IN THE SOUTHERN CALIFORNIA BIGHT
Paper number: 128-3
Program: Technical Sessions
Time: 9:00 AM – 6:30 PM
Authors
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Ryan VentureliIndiana State University, Terre Haute, IN
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Anthony RathburnIndiana State University, Terre Haute, IN
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Steven BedravaIndiana State University, Terre Haute, IN
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Wiebke ZiebisUniv of Southern California, Los Angeles, CA
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Ashley BurkettIndiana State University, Terre Haute, IN
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Elena M. PerezNatural History Museum, London, N/A
Abstract
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.