1. Ocean Drilling Program Leg 201 Shipboard Scientific Party.
2. Institut für Chemie und Biologie des Meeres, Universität Oldenburg, D-26111 Oldenburg, Germany.
3. University of Rhode Island Graduate School of Oceanography, Narragansett, RI 02882, USA.
4. Department of Environmental Science, Roger Williams University, Bristol, RI 02809, USA.