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Earth’s Major Biomes. Earth’s Major Biomes. Type of biome controlled by temperature and precipitation. Earth’s Major Biomes. Tundra. Earth’s Major Biomes. Tundra. Characterized by: Very short growing season Little precipitation (10-25 cm / yr) Permafrost Low species diversity.

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earth s major biomes1
Earth’s Major Biomes
  • Type of biome controlled by temperature and precipitation
earth s major biomes3
Earth’s Major Biomes
  • Tundra
  • Characterized by:
  • Very short growing season
  • Little precipitation (10-25 cm / yr)
  • Permafrost
  • Low species diversity
earth s major biomes4
Earth’s Major Biomes
  • Boreal Forest (Tiaga)
earth s major biomes5
Earth’s Major Biomes
  • Boreal Forest (Tiaga)
  • Characterized by:
  • Short growing season
  • Low precipitation (~50 cm / yr)
  • Dominated by conifers (spruce, fir), but also has aspen, birch
earth s major biomes6
Earth’s Major Biomes
  • Temperate Rain Forest
earth s major biomes7
Earth’s Major Biomes
  • Temperate Rain Forest
  • Characterized by:
  • Cool; high precipitation (~127 cm / yr)
  • Dominated by evergreens (hemlock, spruce, cedar)
  • Heavily logged
earth s major biomes8
Earth’s Major Biomes
  • Temperate Deciduous Forest
earth s major biomes9
Earth’s Major Biomes
  • Temperate Deciduous Forest
  • Characterized by:
  • Hot summers, cold winters
  • Moderate precipitation (75-150 cm / yr)
  • Dominated by oaks, hickory, maple
  • Commonly converted to agriculture
earth s major biomes11
Earth’s Major Biomes
  • Grasslands
  • Characterized by:
  • Hot summers, cold winters
  • Low to moderate precipitation (25-75 cm / yr)
  • Dominated tallgrass or shortgrass prairies
  • Heavily converted to agriculture
earth s major biomes13
Earth’s Major Biomes
  • Chaparral
  • Characterized by:
  • Dry summers, mild winters
  • Frequent fires
  • Dominated by short pines, evergreen shrubs, scrub oak (but varies worldwide)
earth s major biomes15
Earth’s Major Biomes
  • Deserts
  • Characterized by:
  • Wide daily variations in temperature
  • Very dry (<25 cm precipitation / yr)
  • Sparse plant coverage
earth s major biomes17
Earth’s Major Biomes
  • Savanna
  • Characterized by:
  • Precipitation 76-150 cm / yr, but very seasonal with extended dry periods
  • Dominated by grasses, with occasional trees
  • African most famous for herds of wildebeest, antelope, zebra
earth s major biomes18
Earth’s Major Biomes
  • Tropical Rain Forests
earth s major biomes19
Earth’s Major Biomes
  • Tropical Rain Forests
  • Characterized by:
  • Very high precipitation 200-450 cm / yr
  • Very nutrient-poor soil
  • Extremely high primary productivity
  • Extremely high species richness
earth s major biomes20
Earth’s Major Biomes
  • Vertical Zonation: The Distribution of Vegetation on Mountains
aquatic ecosystems
Aquatic Ecosystems
  • Human Impacts on Coral Reefs
  • Sedimentation / siltation
  • Pollution
  • Overfishing
  • Direct disturbance (anchor dragging, divers damaging / collecting specimens)
aquatic ecosystems1
Aquatic Ecosystems
  • Human Impacts on the Ocean
aquatic ecosystems2
Aquatic Ecosystems
  • Human Impacts on the Ocean