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Planet Earth Report -- Weird Signal from Proxima Centauri to Why Humans Won t Dominate Earth in 300 Years
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The Red Queen Phenomenon -- No One Species has an Advantage on a Planet Where 99% Have Gone Extinct
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Richard Collins: Sizing up life on an island
The Island Rule states that species living on islands tend to become either bigger or smaller, depending on the resources available
The remains of a Giant Irish deer at the Natural History Museum in Dublin. Picture: Haydn West
Wed, 05 May, 2021 - 22:30
In Through the Looking-Glass, Alice participates in ‘the Red Queen’s race’. To stay in the same place on the chessboard, she has to keep running constantly. The Red Queen Hypothesis says that, like Alice, a species can’t rest on its evolutionary laurels; its survival depends on keeping abreast of developments taking place among co-evolving predators, prey and rivals.
IMAGE: A juvenile Brookesia micra standing on a human finger tip view more
Credit: Frank Glaw, Jörn Köhler, Ted M. Townsend, Miguel Vences, CC BY 2.5, via Wikimedia Commons
It is an old-standing theory in evolutionary ecology: animal species on islands have the tendency to become either giants or dwarfs in comparison to mainland relatives. Since its formulation in the 1960s, however, the island rule has been severely debated by scientists. In a new publication in
Nature Ecology and Evolution on April 15, researchers solved this debate by analysing thousands of vertebrate species. They show that the island rule effects are widespread in mammals, birds and reptiles, but less evident in amphibians.
Le monde sur tapis roulant
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