Components of Earth

Biotic and Abiotic Factors

Spaceship Earth Closed System Resources are limited

Why is earth so favorable for life? Distance from the sun (Temp range) Size of the planet (Gravity)

What sustains life on earth? Earth’s 4 spheres help support organisms Atmosphere Hydrosphere Geosphere Biosphere

Atmosphere Hydrosphere Geosphere Biosphere

Biosphere Abiotic and Biotic Factors Uppermost part of the geosphere, most of the hydrosphere, and lower part of the atmosphere

Why it matters….. Humans are apart of a community of organisms Humans are dependent on healthy ecosystems Humans can disrupt ecosystems harming the organisms and themselves

Ecosystems (Sun) One – way flow of high – quality from the sun Energy is lost as heat through process Warms atmosphere Evaporates and recycles water Generates winds Supports plant growth

What is an ecosystem? An ecosystem includes a community of organisms and their physical environment. Web of relationships Predator/prey Symbiotic Competition Biotic and Abiotic factors

Habitat Biodiversity Food, shelter, water, space Variety of organisms in a given area Abiotic factors When biodiversity decreases in an ecosystem, health of the ecosystem decreases.

Impact Populations Limiting factors Resources Law of tolerance too much or too little of abiotic factor Nutrients, precipitation, temperature

Biological Components Producers (Autotroph) Make their own food Consumers (Heterotroph) Feed on other organisms Omnivores Carnivores Herbivores Detritivores

Food Chain VS Food Web

Food Chain VS Food Web Food Chain Food Web Producer to herbivore to carnivore Omnivore Food Web Interconnected food chains Complicated Loss of energy/10% Rule

Energy Flow in Ecosystems Trophic levels Each step in the transfer of energy in an ecosystem Primary source, Sun Producer Consumer Decomposer

Feeding levels Trophic levels Producers are the lowest level Primary consumers Secondary consumer Tertiary consumer and so on 10% rule, 90% energy lost as heat, growth, reproduction

Energy Pyramid Demonstrates the amount of energy transferred to each level 10% Rule