The author thanks ODP for providing the samples for this study and acknowledges the financial support of the Swiss National Science Foundation to participate in Leg 165. Funding for the analytical costs for stable isotope analyses were provided by the Swiss National Science Foundation. The technical support of the Stable Isotope Laboratory in Zurich is gratefully acknowledged. Jane Teranes and Miriam Andres are thanked for their help in processing the samples. The manuscript benefited from the careful reviews by Ben Flower, Evan Franseen, and Mark Leckie.