According to a new study, it would take an astounding 3 million years for the number of species that have been lost due to human activity on Madagascar to be restored. Furthermore, the study found that if currently threatened species were to become extinct, it would take more than 20 million years f
Madagascar is a globally recognized biodiversity hotspot, renowned for its abundance of unique species, from baobab trees to lemurs. The island is quite extraordinary in that approximately 90% of its species of plants and animals are found nowhere else. After humans arrived on the island 2500 years ago, it has experienced a multitude of extinctions, including the loss of giant lemurs, elephant birds, and dwarf hippos.
Lowland Streaked Tenrec . This is a species of tenrec, a diverse and unique group of mammals found only on Madagascar. Credit: Chien C. LeeA team of biologists and paleontologists from Europe, Madagascar, and the United States set out to answer these questions by building an unprecedented new dataset describing the evolutionary relationships of all species of mammals that were present in Madagascar at the time that humans colonized the island.
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It would take 23 million years for evolution to replace Madagascar's endangered mammalsIn many ways, Madagascar is a biologist's dream, a real-life experiment in how isolation on an island can spark evolution. About 90% of the plants and animals there are found nowhere else on Earth. But these plants and animals are in major trouble, thanks to habitat loss, over-hunting, and climate change. Of the 219 known mammal species on the island, including 109 species of lemurs, more than 120 are endangered. A new study in Nature Communications examined how long it took Madagascar's unique modern mammal species to emerge and estimated how long it would take for a similarly complex set of new mammal species to evolve in their place if the endangered ones went extinct: 23 million years, far longer than scientists have found for any other island.
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