1. Flathead Lake Biological Station, University of Montana , Polson, MT, USA
2. Department of Biology, State University of New York at Geneseo , Geneseo, NY, USA
3. Biology Department, Woods Hole Oceanographic Institution , Woods Hole, MA, USA
4. Biology Department, Willamette University , Salem, OR, USA
5. Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution , Woods Hole, MA, USA
6. Graduate School of Oceanography, University of Rhode Island , Narragansett, RI, USA