We thank Bill Lee and Mark Robinson for designing and implementing the microsphere delivery system. In addition, we thank the entire technical staff of Leg 185, especially Anne Pimmel and Erik Moortgat, for assistance with the gas chromatograph, Roy Davis for assistance with the epifluorescence microscope, and John Pretorius, Pieter Pretorius, Patrick Riley, and Matt O'Regan for making the laboratory van functional. We especially thank Kate Moran for facilitating the implementation of this study.