BIOMES

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

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

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

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

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

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

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

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