Yosemite National Park's Five Major Biomes

Vertical Zonation in the Sierra Nevada

Yosemite's 11,000-foot elevation gradient creates distinct ecological communities:

1. Chaparral (Foothills, 1,000–3,000 ft)

Dense, evergreen shrubs (manzanita, ceanothus, chamise) adapted to summer drought. Habitat for deer, rabbits, quail, reptiles.

2. Oak Woodland (Lower Montane, 3,000–5,000 ft)

Blue oak, interior live oak, gray pine savannas. High biodiversity: acorn woodpeckers, deer, gray squirrels, diverse understory.

3. Coniferous Forest (Mid-Montane to Subalpine, 5,000–9,000 ft)

Mixed conifers: ponderosa pine, sugar pine, white fir, incense cedar. Giant sequoia groves (Mariposa, Tuolumne, Merced) in southern park. Black bears, mule deer, numerous birds.

4. Alpine Meadows (Above Treeline, >9,000 ft)

Grassy flats, wildflower displays, krummholz whitebark pine. Specialists: yellow-bellied marmots, pikas, Clark's nutcrackers, Sierra Nevada bighorn sheep.

5. Riparian & Aquatic (All Elevations)

Stream corridors with willows, alders, cottonwoods. Critical for amphibians, aquatic insects, migratory birds, and native trout.

This vertical diversity makes Yosemite a biodiversity hotspot and a living laboratory for climate change research.