Impacts on the Biosphere

Learning Targets- I can:• Explain how biotic and abiotic factors determine biome classification

(temperature, rainfall, altitude, type of plant, latitude, type of animals).

• Compare impacts of biotic and abiotic factors on biodiversity. • Match landforms and soils (and their change over time) to biomes.

Biomes• Desert• Hot/dry• Semi-arid• Coastal• Cold

• Aquatic• Freshwater• Marine

• Grasslands• Temperate• Savanna

• Forest• Tropical• Temperate• Boreal

• Tundra• Arctic• Alpine

North Carolina Biomes•Aquatic

Marine

Forests

Temperate

Boreal

Abiotic Factors•Climate• Temperature•Precipitation• Sunlight• Soil• Space for species activities•Nutrients; carbon, nitrogen, phosphorus•Water

Biotic Factors•Plants•Animals•Bacteria•Viruses•Parasites

Limiting Factors•Scarcity of water or sunlight•Lack of food/prey•Too few members of species to reproduce & pass along genetic diversity

Biosphere & Biodiversity•Biosphere- all life on Earth•Biodiversity- the result of:• genetic variation within

populations and • variation of populations within

ecosystems

Some species are developed through genetic variation as a result of isolation from one another. The Kaibab squirrel and Abert’s squirrel (different species) exist on opposite sides of the Grand Canyon.