Figure 6: Location of experimental stations with a plenty of Dsr matching sequences. A � Gutless Worm, Bay of Capo di Sant� Andrea, Elba; B � Alvinella Pompejana, East Pacific Rise; C � Farm Soil, Waseca County; D � Deep Mediterranean, Ionian 3 Km station; E � Richmond Acid Mine; F � Sargasso Station 13; G � Upwelling, Fernandina Island, Galapagos; H � Punta Cormorant, Hypersaline Lagoon, Floreana Island, Galapagos.