Monday, October 16, 2023

The Galápagos Got Back Its Giant Tortoises—And a Whole Lot More | Afghanistan’s terrible earthquakes | Estonia’s Skeleton Technologies raises another €108m to scale fast-charging battery tech | Indonesia's EV ambitions could help boost investments in the rest of Southeast Asia

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The Galápagos Got Back Its Giant Tortoises—And a Whole Lot More - The Atlantic   

By the late 19th century, whalers, settlers, and pirates had changed the ecology of the Galápagos Islands by poaching some native species—like Galápagos giant tortoises—and introducing others, such as goats and rats. The latter species became pests and severely destabilized the island ecosystems. Goats overgrazed the plants the tortoises ate while rats preyed on their eggs. Over time, the tortoise population plummeted. On Española, an island in the southeast of the archipelago, the tortoise count fell from thousands to less than 20. Along the way, as goats ate all the plants they could, Española—once akin to a savanna—turned barren.

In the following century, conservationists set out to restore the Galápagos giant tortoise on Española—and the island ecosystem. They began eradicating the introduced species, and capturing Española’s remaining tortoises and breeding them in captivity. With the goats wiped out and the tortoises in cages, the ecosystem transformed once again. This time, the overgrazed terrain became overgrown with densely packed trees and woody bushes. Española’s full recovery to its savanna-like state would have to wait for the tortoises’ return.

From the time those remaining tortoises were taken into captivity, from 1963 to 1974, until they were finally released, in 2020, conservationists with the NGO Galápagos Conservancy and the Galápagos National Park Directorate reintroduced nearly 2,000 captive-bred Galápagos giant tortoises to Española. Since then, the tortoises have continued to breed in the wild, causing the population to blossom to an estimated 3,000. They’ve also seen the ecology of Española transform once more as the tortoises are reducing the extent of woody plants, expanding the grasslands, and spreading the seeds of a key species.

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