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“While there’s no silver bullet solutions to environmental restoration, beavers are a keystone species, and an important part of the puzzle to restore our ecosystems in California.”

“The desert tortoise is considered a keystone species, which means that they have a disproportionate effect on the entire ecosystem,” says Henen, a civilian who heads the conservation branch of the base’s Environmental Affairs Division.

Considered "keystone species" by many, crayfish play an outsized role as food sources for other animals and as ecosystem engineers, creating burrows that act as habitat for many species in semi-terrestrial environments.

Regardless, Musk and Ramaswamy are forging ahead with hires, using language that suggests their project is the keystone of Trump's second term's agenda.

Many keystone tree species of the region, including red and white oaks, depend on fire to curb undergrowth and create space within the canopy so sunlight can reach seedlings.