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Blalock Ecology

GA S7L4 Ecology

ecology the study of the interactions between organisms and their environment
biotic describes living factors in the environment
abiotic describes nonliving factors in the environment
population a group of individuals of the same species that live together in the same area at the same time
community all of the populations of different species that live and interact in an area
ecosystem a community of organisms and their nonliving environment
biosphere the part of the Earth where life exists
herbivore a consumer that eats plants
carnivore a consumer that eats animals
omnivore a consumer that eats a variety of organisms
scavenger an animal that feeds on the bodies of dead animals
food chain a diagram that represents how the energy in food molecules flows from one organism to the next
energy pyramid a diagram that shows the loss of energy at each level of the food chain
food web a complex diagram representing the many energy pathways in a real ecosystem
habitat the environment where an organism lives
niche an organism's way of life and its relationships with its abiotic and biotic environments
carrying capacity the largest population that a given environment can support over a long period of time
prey an organism that is eaten by another organism
predator an organism that eats other organisms
mutualism a symbiotic relationship in which both organism benefit
commensalism a symbiotic relationship in which one organism benefits and the other is unaffected
parasitism a symbiotic relationship in which one organism benefits while the other is harmed
coevolution the long-term changes that take place in two species because of their close interactions with one another
primary consumer in a food chain, an organism that eats plants, such as a rabbit
secondary consumer in a food chain, an organism that feeds on plant-eaters; also called a predator
tertiary consumer in an ecosystem, a predator that feeds on other predators
quartenary consumer eats a tertiary consumer; example...a hawk eats an owl