Despite pockets of agriculture, the islands are unnaturally barren due to wanton deforestation and the disappearance of the native olive groves, juniper and carob plantations. Fifty years ago[when?] much of the landscape was farmland bounded by dry stone walls but today, the local economy is based on sponge fishing and canning, supplemented by tourism in Lampedusa.
Of particular ecological concern in the islands is the protection of the loggerhead sea turtle (Caretta caretta) which is endangered throughout the Mediterranean as a result of its nesting sites being taken over by tourism. In Italy the beaches of Pozzolana di Ponente on Linosa and Isola dei conigli on Lampedusa are two of the last remaining sites where the turtle regularly lays its eggs, the others (larger) being in southern Calabria (close to Reggio Calabria). The Area Marina Protetta Isole Pelagienature reserve, covering all three islands, was instituted in 2002.
