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Env. Science

chap. 5

the movement of carbon from the nonliving environment into living things and back carbon cycle
the process by which cells produce energy from carbohydrates; atmospheric oxygen combines with glucose to form water and carbon dioxide cellular respiration
a final, stable community in equilibrium with the environment climax community
an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources consumer
an organism that feeds by breaking down organic matter from dead organisms; examples include bacteria and fungi decomposer
a gradual process of change and replacement in a community ecological succession
the pathway of energy transfer through various stages as a result of the feeding patterns of a series of organisms food chain
a diagram that shows the feeding relationships between organisms in an ecosystem food web
the process in which nitrogen circulates among the air, soil, water, plants, and animals in an ecosystem nitrogen cycle
bacteria that convert atmospheric nitrogen into ammonia nitrogen-fixing bacteria
the cyclic movement of phosphorus in different chemical forms from the environment to organisms and then back to the environment phosphorus cycle
the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce carbohydrates and oxygen photosynthesis
a species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established pioneer species
succession that begins in an area that previously did not support life primary succession
an organism that can make organic molecules from inorganic molecules; a photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem producer
the process by which one community replaces another community that has been partially or totally destroyed secondary succession
one of the steps in a food chain or food pyramid; examples include producers and primary, secondary, and tertiary consumers trophic level
Created by: kathyadams