
Grove Koger
The first time I ran across the term “Macaronesia,” I assumed it must be a misprint for “Macronesia,” and that the term must refer to some grouping of large (“macro”) islands. Micronesia, after all, is a region of small (“micro”) islands in the Pacific Ocean.
But I was wrong. Macaronesia is indeed the correct term and is derived from the Greek phrase makárōn nēsoi, meaning “fortunate isles” or “isles of the blessed”—an enticing but largely mythological reference to the islands that lie, or might lie, west of the Strait of Gibraltar in what we know today as the Atlantic Ocean. In this sense, they were a land of perpetual summer, and, according to Pliny the Elder, abounded in “fruit and birds of every kind.”

But pinning down the term’s modern meaning isn’t quite so simple. The term “Macaronesia” was apparently coined by British botanist Philip Barker-Webb (1793-1854), who included three archipelagoes—Madeira, the Selvagens and the Canary Islands—in the designation, all of them lying off the coast of Northwest Africa. However, later botanists added the Azores, which lie nearly 900 miles west of Portugal, and Cabo Verde, which lies more than 300 miles west of westernmost Africa. (I’m indebted for this information to the authors of “Restructuring of the ‘Macaronesia’ Biogeographic Unit: A Marine Multi-Taxon Biogeographical Approach” in Scientific Reports.)
Of these five groups, Madeira, the Selvagens (which are administered from Madeira), and the Azores are part of Portugal, the Canary Islands are part of Spain, and Cape Verde, which was once a colony of Portugal, is now an independent nation.

If you look at the map at the top of today’s post, however, you’ll notice how widely separated some of them are; the Azores, for instance, are more than 1,500 miles from Cape Verde, and Cape Verde itself is about 1,000 miles from the Canaries. Does it really make sense to group them together?
The authors of “Restructuring of the ‘Macaronesia’ Biogeographic Unit” don’t think so, writing that they “found no support for the current concept of Macaronesia as a coherent marine biogeographic unit.” They reached their conclusion after considering six kinds of marine life, and in light of what they found, they suggested removing Cape Verde and giving it “status of a biogeographical subprovince within the West African Transition province.” They also suggested removing the Azores and establishing them as their own ecoregion, and establishing a new ecoregion made up of Madeira, the Selvagens, and the Canary Islands.

While the scientific terminology involving biogeographical regions may not be familiar, the thrust of the authors’ comments is clear: Philip Barker-Webb got it right, and in his honor, the authors suggest calling the new ecoregion Webbnesia.
□□□
The map at the top of today’s post was created by ArnoldPlaton and is reproduced courtesy of Wikimedia Commons.The first photograph, of a mountain village in Madeira, is by ArunSwamiPersaud (pixabay.com) and is reproduced courtesy of Needpix.com. The second photograph, showing a typical scene in the Selvagens, is by Coimbra68 and is reproduced courtesy of Wikimedia Commons, while the third photograph, taken by laurajane (pixabay.com), is of Tenerife in the Canary Islands, and is reproduced courtesy of Needpix.com.
□□□
If you’ve enjoyed today’s post, please share!





















