During an important era in the history of the Pitiusas Islands, the salt flats were their main economic driving force. The first advances came to the islands in connection with this salt extraction industry. The first steam engine, the first diesel engine, the first telephone and, up until today, the first train. The salt flats in Ibiza and Formentera were the first cause, the first struggle, to be taken up by the first conservation movement and as a consequence of that, the salt flats in Ibiza and Formentera came to be the first protected area in our Pitiusas Islands.
Las Salinas Nature Reserve in Ibiza and Formentera constitutes one large ecological unit that, even if it features a high degree of diversity, contains within itself climatic, geographical, landscape and other characteristics that lead it to present its own environmental conditions defining the zone.
Located between the two islands of Ibiza and Formentera, this space–along with the stretch of sea and islets that join them—makes up one of the richest, most diverse and singular natural areas in not only the Balearic Islands but even as far as the bio-geographical region of the Western Mediterranean is concerned.
This enormous biodiversity is determined, at the same time, by the diversity of environments and ecosystems existing in the area itself: salt ponds, marshes, woods, fields under cultivation, systems of sand dunes, rocky coastlines and marine cliffs, the presence of firm, sandy sea beds covered by Posidonia oceanica and islets.
In the salt flats of Ibiza and Formentera we can find the main populations of waterfowl in the Pitiusas Islands. These include species that find places to nest in the ponds and marshlands, others that take refuge from the cold of northern Europe, spending the wintertime, and still others that use the salt flats as a stopping-off point on their migratory journeys. What is more, they are joined by local birds from our fields and woods as well as seabirds.
However, in addition to the birds, there are other groups of fauna such as marine fauna which are no less important. This is the case when it comes to the populations of fishes, cetaceans—with a total of three different species of dolphin—as well as the chance to see sperm whales and minke whales, along with a large number of marine turtles, among others.
The pink colouring that is rare in natural areas and which is such a clear feature of the salt flats is found both extensively and sporadically here. Firstly, a form of bacteria known as Halobacterium covers the bottom of the ponds over the whole area. It lends this special colour to the entire area comprising the crystallising ponds. Occasionally, the same extreme conditions found in these hypersaline ponds leads them to be inhabited by a small crustacean known as Artemia salina which—owing to the low level of oxygen in the water—requires a large amount of respiratory pigments, giving it a strong reddish colouring. Curiously, the fact that the flamingos make use of this tiny shrimp or crustacean as a foodstuff is what causes their wings to turn pink. Thus the ponds are pink, the crustaceans are pink and the flamingos that fly over the ponds like flares are themselves pink.