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North-Central Section - 43rd Annual Meeting (2-3 April 2009)

Paper No. 8
Presentation Time: 1:00 PM-5:00 PM

COMPARISONS OF 63-150 MICRON AND >150 MICRON SIZE FRACTIONS OF ROSE BENGAL STAINED FORAMINIFERA INHABITING METHANE-SEEP CLAM BEDS IN MONTEREY BAY, CALIFORNIA


TAYLOR, Ronald D.1, WAGGONER, Jason1, RATHBURN, Anthony E.1, MARTIN, Jon B.2, BERNHARD, Joan M.3, PEREZ, M. Elena1 and GIESKES, Joris4, (1)Geology Program, Indiana State University, Science Building room 179, Terre Haute, IN 47809, (2)Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, FL 32611, (3)Department of Geology & Geophysics, Woods Hole Oceanographic Institution, MS #52, Woods Hole, MA 02543, (4)Integrative Oceanography Division, Scripps Institution of Oceanography, 9500 Gilman Dr, La Jolla, CA 92093-0236, rtaylor13@indstate.edu

In a continuing effort to understand the factors that influence the ecology and isotope geochemistry of benthic foraminifera living in methane-seep habitats, the remotely operated research vehicle, JASON, was used to collect samples in clam beds associated with methane seeps in Monterey Bay, California in August 2007. Distribution patterns of Rose Bengal stained benthic foraminifera in the >150 micron and 63-150 micron size fractions were determined from push-core samples taken in both seep and non-seep environments from water depths of approximately 1000m. Dominant taxa in the >150 micron size fractions of seep and non-seep habitats included Epistominella pacifica, Buliminella tenuata, Cibicides wuellerstorfi, and Globobulimina species. Clam beds had greater infaunal abundances (occurring below 1 cm in sediment depth) compared to those of the control site cores. Results from this study provide important modern analog clues about the ecological dynamics of benthic foraminifera living in methane-seep clam beds.

Session No. 17--Booth# 8

T13. Undergraduate Research II (Posters)
Thursday, 2 April 2009: 1:00 PM-5:00 PM
Geological Society of America Abstracts with Programs. Vol 41, No. 4, p.29
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