Uruguay's Vegetation: The Pampa Grasslands & Hidden Forests

Uruguay's natural cover is predominantly temperate grassland — the southern extension of the Pampa biome — but mosaics of forest, wetland, and coastal systems add ecological depth.

1. Pampa Grasslands (80%+ original cover)

• Dominant grasses: Stipa (needlegrass), Piptochaetium, Poa, Bothriochloa — perennial tussocks.
• Forbs: Eryngium (buttonweed), Baccharis, legumes (Adesmia, Desmodium).
• Grazing adaptation: Deep roots, fire tolerance, meristem protection.
• Fauna: Pampas deer, capybara, rhea, ovenbirds, tuco-tucos.

2. Gallery Forests (Riparian Corridors)

• Along Uruguay, Negro, Yí, Queguay, Santa Lucía rivers.
• Species: Salix humboldtiana (willow), Populus, Alnus, Cephalanthus, Blepharocalyx (arrayán).
• Critical wildlife corridors; filter agricultural runoff.

3. Subtropical Forests (Northeast — Rivera, Cerro Largo)

• Transition to Paranáense/Atlantic Forest.
• Species: Parapiptadenia, Balforoudendron, Ocotea, palms (Euterpe, Butia).
• Fragmented; conservation priority (Arequita, Lunarejo parks).

4. Coastal Systems

• Dunes: Panicum, Hydrocotyle, Senecio — stabilizers.
• Wetlands: Bañados del Este (Ramsar) — marsh, lagoons, 300+ bird spp.
• Rocky coast: Baccharis scrub, endemic Senecio spp.

5. Anthropogenic Shift

• 60%+ grassland → improved pasture (ryegrass, clover) / crops (soy, wheat, rice).
• Eucalyptus/pine plantations (1M+ ha) — pulp, carbon credits.
• Native grassland remnants <20% — priority for conservation ranching.

Uruguay looks like endless grass — but the details hold a continent's ecology.