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| Macaronesian region | |
|---|---|
| Name | Macaronesian region |
| Settlement type | Biogeographic region |
| Subdivisions | Azores, Madeira, Canary Islands, Cape Verde |
Macaronesian region The Macaronesian region comprises four North Atlantic archipelagos—Azores, Madeira, Canary Islands, and Cape Verde—noted for shared volcanic origins, insular biodiversity, and strategic maritime location. The region links historic maritime routes such as the Age of Discovery, connects biogeographic concepts like endemism and island biogeography, and features political jurisdictions including Portugal and Spain alongside the sovereign state of Cape Verde.
The name derives from the Greek term "Macaronesia" historically associated with the Fortunate Isles and later used in works by Ulisse Aldrovandi and Philip Barker-Webb; modern usage appears in botanical and zoogeographic classifications like those by Philip Sclater and Erwin Stresemann. Definitions vary among authors such as Óscar Lourenço and institutions like the International Union for Conservation of Nature (IUCN), with delimitation decisions affecting listings in compilations by BirdLife International, World Wildlife Fund (WWF), and the European Environment Agency. Debates about inclusion of peripheral islets and biogeographic boundaries reference classification schemes used by Brummitt, Takhtajan, and the APG systems in floristic treatments.
The archipelagos occupy the eastern and central North Atlantic: the Azores lie on the North American Plate–Eurasian Plate boundary, Madeira sits south of the Iberian Peninsula off Portugal, the Canary Islands lie west of Western Sahara and Morocco under Spain, and Cape Verde sits off the Senegal coast forming the republic of Cabo Verde. Major islands include São Miguel, Pico, Madeira, Tenerife, Gran Canaria, Fuerteventura, Lobos Island, Santo Antão, and Sal. Maritime features such as the Azores Triple Junction, Mid-Atlantic Ridge, and the Canary Current shape oceanography, while ports like Funchal, Ponta Delgada, Santa Cruz de Tenerife, and Cidade da Praia anchor transport networks.
The Macaronesian islands originate from hotspot and plate-related volcanism associated with structures like the Azores Triple Junction, mantle plumes postulated by researchers such as J. T. Wilson and W. Jason Morgan, and seamount chains including the Great Meteor Seamounts and Fuerteventura volcanic complex. Volcanic materials range from basalt to phonolite with stratigraphy studied by geologists such as George Walker and A. P. Nutman. Historic eruptions include La Palma 1798 and the Eruption of 2021 in Cumbre Vieja, while geomorphology features calderas like Caldera de Taburiente, Sete Cidades, and Fogo.
Climatic influences include the Canary Current, the Azores High, and trade wind regimes affecting precipitation patterns across islands from humid subtropical climate zones on Madeira to arid climates on Fuerteventura and Lanzarote. Biogeographic affinities link Macaronesia to the Mediterranean Basin, North Africa, and tropical West Africa; floristic regions reference works by Armando Noronha, Félix de Silva, and the Flora Europaea project. Oceanic and montane microclimates produce laurisilva cloud forest remnants comparable to taxa recorded by Charles Darwin on other islands and catalogued in checklists by institutions like the Royal Botanic Gardens, Kew.
The islands harbor high levels of endemism exemplified by plant genera and species such as Laurus azorica, Laurus relatives, Echium species like Echium wildpretii, and unique laurel forest assemblages with taxa described by Philip Webb and Sabin Berthelot. Endemic fauna includes the Azores bullfinch (Pyrrhula murina), Madeiran firecrest (Regulus madeirensis), Canary Islands chiffchaff (Phylloscopus canariensis), Cabo Verde shearwater (Calonectris edwardsii), and invertebrates such as the Madeiran land snail genera catalogued by Juan Aguilar. Marine endemics and reef-associated species recorded by researchers at the Instituto Português do Mar e da Atmosfera and Centro de Investigação Marinha reflect Atlantic isolation.
Human contact includes pre-European navigational hypotheses debated with evidence ranging from Phoenician and Carthaginian voyaging claims to documented colonization during the Age of Discovery by explorers such as Diogo Gomes, João Gonçalves Zarco, and Jean de Béthencourt. Portuguese settlement of the Azores and Madeira and Castilian/Spanish control of the Canary Islands followed treaties like the Treaty of Alcáçovas and the Treaty of Tordesillas while Cape Verde developed as an Atlantic hub in the Atlantic slave trade and later independence movement led by figures such as Amílcar Cabral. Cultural syncretism produced Creole languages like Cape Verdean Creole and political ties to states including Portugal and Spain.
Economic activities include tourism concentrated in destinations like Funchal, Playa de las Américas, and Sal Island; agricultural exports such as sugarcane historically, banana cultivation, wine production from Malvasia grapes, and modern sectors including fisheries and renewable energy projects by companies and agencies like EDP Renováveis. Transport infrastructure links islands through airlines such as TAP Air Portugal and Binter Canarias and ports like Port of Las Palmas, while land use shifts involve terracing, viticulture zones exemplified by Madeira wine landscapes, and urban growth in capitals like Mindelo.
Conservation priorities address threats from invasive species such as Rattus rattus and Opuntia ficus-indica management, habitat loss impacting laurisilva and endemic taxa, and climate change effects on sea level and ocean acidification documented by Intergovernmental Panel on Climate Change (IPCC). Protected areas include Laurisilva of Madeira (a UNESCO World Heritage Site), the Parque Natural do Fogo, and marine reserves recognized by bodies like European Commission conservation directives and Ramsar Convention listings. Restoration programs involve botanical gardens such as Jardim Botânico da Madeira, research by agencies like Instituto Nacional de Estatística (Portugal), and NGO efforts from BirdLife International and local conservation groups.
Category:Biogeographic regions