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Ch 5 Env Sci Voc. GM

Chapter 5 - How Ecosystems Work- p. 142- Gaby Montoya

Photosynthesis energy from the sun enters an ecosystem whena plant uses sunlight to make sugar molecules.
Producers is an organism that makes its own food.
Consumers organisms that get their energy by eating other organism.
Decompsers Some consumers get their food by breaking down dead organisms.
Cellular Respiration Process of breaking down food to yeild energy.
Food Chain A sequence in which energy is transfered from an organism to the next as each organism each organism eats anothers.
Trophic Level One of the teps in a food chain or food pyramid.
Carbon Cycle The movement of carbon from the nonliving enviroment into livingsthings and back.
Nitrogen-fixing bacteria bacteria that convert atmospheric nitrogeninto ammonia.
Nitrogen Cycle a process in which nirogen is cycled between the atmosphere, bacteria, and other organisms
Phosphorus Cycle is the movement of phosphorus from the environment to organisms and then back to the environment
Ecological Succession is a gradual process of change and replacement of some or all of the species in a community.
Primary Succession is the type of succession that occurs on a surface where no ecoysystem existed before, such as rocks or sand dunes
Secondary Succession the more common type of succession, occurs on a surface where an ecoysystem has previously existed.
Pioneer Species the first organisms to colonize any newly available area and begin the process of ecological succession
Climax Community is a fial and stable community
Created by: gmontoya1