Professor Stephen Monismith and Jessie Lacy of Stanford University provided the drifters used in these studies. Jim Cloern, USGS, Menlo Park, provided crew for the flooded island experiments: Lisa Lucas, Jean-Marc Guarini and Nancy Monson. Francis Parchaso, USGS, Menlo Park, and Jon Yokomizo, USGS, Sacramento, helped with the Suisun Bay experiments. This work was supported by the Interagency Ecological Program (IEP) and through the Federally funded Integrated Natural Resource Science (INATURES) program.