1. Dep. of Geological and Environmental Sciences; Stanford Univ.; Stanford CA 94305-2115
2. RMC Water and Environment; Sacramento CA
3. School of Medicine, Stanford University; Stanford CA
4. Instituto Tecnologico de Canarias; Playa de Pozo Izquierdo Las Palmas Canary Islands Spain
5. USDA-ARS, George E. Brown Jr. Salinity Lab.; Riverside CA 92507-4617