The Atlantic's Fortunate Isles: A Volcanic Time Capsule of Ancient Mediterranean Forests

Countries & Cities · Published 30 September 2026 Swipe more like this →

In short: Far off the coasts of Europe and Africa lie four volcanic archipelagos known as Macaronesia. These islands are not just scenic retreats; they are biological time capsules. They harbor rare laurisilva forests—relics of a prehistoric era that once blanketed the Mediterranean Basin before the ice ages changed the world forever.

The term Macaronesia, derived from the Greek for 'islands of the fortunate,' was revived in 1917 to describe a unique collection of Atlantic archipelagos: the Azores, Madeira, the Canary Islands, and Cape Verde. Geologically, these islands are the peaks of massive seamounts rising from the ocean floor, primarily situated on the African tectonic plate. While the Azores sit at a complex triple junction of the Eurasian, African, and North American plates, the entire region is united by its volcanic origin and its status as a biogeographical anomaly.

Because these islands were never connected to a continent, every native species arrived through long-distance dispersal. This isolation allowed for the evolution of unique ecosystems, most notably the laurisilva. These mountain cloud forests, found between 400 and 1,200 metres in altitude, contain plant genera like Apollonias and Persea that once thrived across the Mediterranean and northwestern Africa. Fossil evidence confirms that these species were widespread before the climate cooled and dried during the ice ages, leaving the islands as the last refuge for this ancient vegetation.

Today, this fragile heritage faces significant pressure. Human activity, including deforestation and the introduction of foreign species, has fragmented the original habitats. A particularly severe threat is hyperpredation: introduced cats, sustained by high numbers of non-native rodents and rabbits, exert intense pressure on endemic reptiles and birds. While the European Union has protected 5,000 square kilometres of land and sea across the Azores, Madeira, and the Canary Islands since 2001, many endemic species remain critically endangered as these isolated pockets of prehistoric life struggle to survive in a modern world.

The political landscape of the region is as varied as its climate, which ranges from the humid Azores to the desert-like Canary Islands. The Azores and Madeira are autonomous regions of Portugal, while the Canary Islands are an autonomous community of Spain; all three are part of the European Union. Cape Verde, by contrast, is a sovereign state and a member of the African Union, highlighting the complex intersection of European and African influences that define this Atlantic crossroads.

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