Biomes Around the World
Rainforest
Tundra
Savanna
Grassland
Mountain
Rainfall and soils insufficient to support significant tree growth
Most common at mid-latitudes and near the interiors of continents
Semi-arid climate
Grasslands are often exploited for agricultural use
Vegetation structure that is dominated by grasses
Fires
Seasonal droughts
Moderate rainfall
Warm temperatures
Coarse grasses and diverse animals.
Small summit areas
Steep inclines
High altitude
Sharp ridges
Lower oxygen levels
An estimated 50 percent of terrestrial biodiversity is found in rainforests
Rainforests are thought to store at least 250 billion tons of carbon
Deforestation and degradation of tropical forests account for roughly 10 percent of global greenhouse emissions from human activities
The world's largest rainforest is the Amazon rainfores
Tropical forests presently cover about 1.84 billion hectares or about 12 percent of Earth's land surface (3.6% of Earth's surface).
Low biotic diversity.
Extremely cold climate.
Simple vegetation structure.
Short season of growth and reproduction.
Energy and nutrients in the form of dead organic material.
