In which specific geological region is the surviving habitat of the Paiute Cutthroat Trout almost entirely confined?
Answer
The remote headwaters of the eastern Sierra Nevada in California.
The native range of the Paiute Cutthroat Trout is extremely restricted, surviving almost exclusively in the cold-water headwaters situated in the eastern Sierra Nevada mountains of California. This inherent limitation of their specific habitat contributes significantly to their rarity, even before external threats are factored in. This restricted environment is characterized by cold water typical of high-elevation streams and is intrinsically limited in size and scope, making the entire subspecies highly vulnerable to catastrophic localized events.

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