The restriction of the Yellow-tailed Woolly Monkey suggests a lineage divergence linked to adaptation to which specific environmental conditions?
Answer
Cooler, mistier conditions associated with higher elevation
The highly restricted location of the Yellow-tailed Woolly Monkey in the Peruvian Andes implies a historical evolutionary divergence. One lineage, represented by the common species, remained dominant in the warmer, lower core of the Amazon. The other lineage adapted to climbing significantly higher in elevation to deal with the unique environmental pressures found there—specifically, the cooler temperatures and the persistently misty, wetter conditions characteristic of the Andean cloud forests above 2,000 meters.

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