1. Department of Oceanography; University of Hawaii; Honolulu Hawaii
2. Department of Aquatic Ecology; Eawag: Swiss Federal Institute of Aquatic Science and Technology; Zurich Switzerland
3. Department of Plant Biology; Kellogg Biological Station, Michigan State University; Hickory Corners Michigan
4. Department of Zoology; Kellogg Biological Station, Michigan State University; Hickory Corners Michigan