1. Environmental Sciences Program; Mt. Allison University; Sackville NB E4L 1A7 Canada
2. Earth and Ocean Sciences; Nicholas School of the Environment; Duke University; Durham NC 27708 USA
3. University of Maine and Gulf of Maine Research Institute; Portland ME 04101 USA
4. W.K. Kellogg Biological Station; Michigan State University; Hickory Corners MI 49060 USA
5. Centre for Ocean Life; National Institute for Aquatic Resources; Technical University of Denmark; Charlottenlund DK-2930 Denmark
6. Earth and Oceanographic Science; Bowdoin College; Brunswick ME 04011 USA
7. CERES-ERTI; École Normale Supérieure; 24 Rue Lhomond Paris 75005 France