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PCS Liv Env

Vocabulary for Topic 6 - Ecology

Abiotic nonliving parts of the environment
Autotroph produces its own food; source of energy for all other living things
Biodiversity variety of species in an area
Biosphere all of Earth's ecosystems including water, land, and air in which organisms survive
Carnivore an organism that survives by eating animals
Carrying Capacity the largest population of any single species that survives by eating animals
Community a combination of all the different populations that live and interact in the same environment
Competition the struggle between organisms for the same limited resources in a particular area
Consumer an organism that obtains its energy from producers
Decomposer an organism, generally a bacterium or fungus, that consumes dead organisms and organic waste
Ecology the study of how living things interact with one another and with their environment
Ecological Niche the specific role played by an organism or a population of organisms in the ecosystem
Ecological Succession the process by which an existing community is replaced by another community
Ecosystem all the living and nonliving things that interact in a specific area; a subdivision of the environment
Energy Pyramid a diagram showing how food energy moves through an ecosystem
Environment every living and nonliving thing that surrounds an organism
Food Chain a representation that identifies the specific feeding relationships among organisms
Food Web many interconnected food chains that shows the feeding relationships among producers, consumers, and decomposers
Habitat the place where an animal or plant lives
Herbivore an organism that eats only plants
Heterotroph organism that cannot make its own food; a consumer
Host the organism in a parasitic relationship that provides a home and/or food for the parasite (Hint: a cat is the host to a flea)
Limiting Factors any factor in the environment that limits the size of a population
Parasite an organism that survives by living and feeding on their organism (Hint: a flea is a parasite)
Population all the individuals of a single species that live in a specific area
Predator an animal that hunts and kills other animals for food
Prey an animal that is hunted and killed by predator
Producer an organism that makes its own food from light energy and inorganic materials
Scavenger a carnivore that feeds on the bodies of dead organisms
Biotic living parts of the environment (Hint: "Bio" means living)
Created by: Ms.Sala