The Galapagos Islands still possess a unique terrestrial and marine flora and fauna. The uniqueness of this ecosystem has evolved because of and depends on isolation from the mainland and among islands. This isolation is increasingly diminished through tourism and, in its wake, the immigration of Ecuadoreans who settle in Galapagos to profit from the economic boom accompanying tourism. The breakdown of isolation threatens the whole ecosystem of the Galapagos, therefore plans for a quarantine system are presently being developed by the Charles Darwin Research Station and the Galapagos National Park Service.