GEO 131 Ecology

Biosphere: regions of Earth capable of supporting life

-evolved 3.5 b. years ago

20-30 kn thick (from deep ocean trenches into the atmosphere)

Zone of Life very thin (from core to edge of atmosphere)

Population- group of organisms, all the same species, which interbreed and live in the same area.

Species- same kind of individuals which can reproduce fertile offspring

Community- assemblage of different populations that live together

Ecosystem- collection of organisms that live in a place with the nonliving environment

Biome- collection of ecosystems within the same climate and dominant communities

Tundra is the newest ecosystem because it’s a by-product of glacial melting, fairly new.

Organisms depend on one another. Feeding levels:
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