The Macaronesian islands, or simply Macaronesia is a modern name for several groups of islands of volcanic origin in the Atlantic Ocean off the coast of Europe and Africa. They belong to three countries: Portugal, Spain, and Cape Verde.
Origin of nameEdit
The following groups of islands (archipelagos) are commonly counted as being part of the Macaronesia - from north to south:
- Portuguese islands
- Spanish islands
Geography and environmentEdit
The climate of the Macaronesian islands goes from Mediterranean in the Azores and Madeira to arid in Cape Verde. The Portuguese archipelagos of the Azores and Madeira have a generally cooler climate and higher rainfall than the Canary Islands and Cape Verde.
Even if the distances between the different groups of islands are large, the plants and animals are similar and there are many endemic plants that are found only in these islands.
The islands have a unique biogeography, and are home to several distinct plant and animal communities. The laurel forests,[a] known as laurisilva, of Macaronesia are a type of mountain cloud forest[b] with species of a vegetation type which originally covered much of the Mediterranean Basin when the climate of the region was more humid and evolved to adapt to island conditions. These forests once covered most of the Azores, Madeira, and parts of the Canary Islands ("Canaries") between 400–1200 m altitude (the eastern Canaries and Cape Verde being too dry).
Cutting the trees for timber and wood, clearing vegetation for grazing and agriculture, and the introduction of plants and animals by humans has displaced much of the native vegetation. The laurisilva has been reduced to small pockets. As a result, many of the endemic biota of the islands are seriously endangered or extinct.
- A laurel forest or laurisilva means that the trees have leaves as the laurel but it does not mean that there are laurel trees or any other tree of the family Lauraceae, even if they are common in this type of forest.
- A cloud forest is a tropical or subtropical, evergreen, moist forest in mountains characterized by a persistent, frequent or seasonal low-level cloud cover. Cloud forests often have an abundance of mosses covering the ground and vegetation.
- Jérôme Petit et Guillaume Prudent, « Macaronésie », Changement climatique et biodiversité dans l’outre-mer européen, UICN/ONERC, 2008, p. 124-137