Breaking ecosystems apart and then putting them back together actually makes them more biodiverse than leaving them alone.
April 14, 2026
Original Paper
Fragmentation is a diversity ratchet
arXiv · 2604.09966
The Takeaway
This 'diversity ratchet' challenges the idea that habitat fragmentation is always a disaster for the environment. The cycle of isolation followed by reconnection forces species to adapt and diversify at a much higher rate than stable, continuous environments.
From the abstract
A fragmented landscape reduces the impact of interspeciesconnectivity, leading to higher diversity levels than otherwisepossible in a connected landscape. Reconnecting a previouslyfragmented landscape initiates an extinction event, preferentiallyweeding out more highly connected species. A sequence offragmentation-coalescence events will drive the ecosystem to higherlevels of diversity in a ratchet-like effect, than if the landscapecontinuously remained connected.