1. BIOMES

2. Biotic vs. Abiotic Factors
Biotic Factors – the living; animals and plants Abiotic Factors – the nonliving physical and chemical conditions

3. Abiotic Factors Sunlight Provides Light and Warmth
The source for ALL ecosystems
Water
Essential to all life on Earth

4. Abiotic Factors Temperature
Life (most) live in temperature between 0º → 50º C
Soil
Living things - microorganisms,
plants, and earthworms

5. Abiotic Factors Wind Wind moves clouds and rain
Stirs lakes and ponds moving nutrients
Disperse pollen and seeds

6. Biomes Tropical Forest
Occur near the equator where temperatures are warm year round
Can receive as much as 350 cm of rain yearly
Greatest diversity of life

7. Savanna / Tropical Grassland / Shrubland
Grasslands with scattered trees
produce food for grazing animals
Typically have warm climate – wet and dry seasons

8. Desert Include land areas receiving less than 25 cm of rain per year
Temperatures vary widely
Not many plants

9. Tundra Characterized by bitter cold temperatures and high winds
Permafrost – Permanently frozen subsoil.
Large plants are rare because of roots cannot penetrate permafrost.