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biosphere the part of Earth that supports life, including the top portion of Earth's crust, all that waters that cover Earth's surface and surrounding atmosphere
carrying capacity the largest numver of individuals of one species that an ecosystem can support over time
commensalism a symbiotic relationship in which one organism benefits and the other is affected
community all the populations in an ecosystem
consumer organisms that cannot make their own energy-rich molecules
ecology the study of interactions that occur among organisms and their enviroment
ecosystem all the organisms living in an area and nonliving features of their enviroment
habitat the place in which an organism lives
limiting factor anything that restricts the number of individuals in a population
mutualism a symbiotic relationship in which both species benefit
niche how an organism survives;including its habitat how it obtains food and shelter, and how it avoids danger
parasitism a symbiotic relationship in which one organism benefits but the other is harmed
population all the organisms in an ecosystem that belong to the same species
producer organisms that use an outside energy source, such the sun, to make energy-rich molecules
symbiosis any close relationship between species
predator any organism that exists by preying upon other organisms
prey an animal hunted or seized for food, esp. by a carnivorous animal
competition the act of competing; rivalry for supremacy
chemosynthesis process in which producers make energy-rich nutrient molecules from chemicals
food web model that shows the complex feeding relationship among organisms in the community
food pyramid successive levels of predation in a food chain represented schematically as a pyramid because upper levels normally consist of decreasing numbers of larger predators
food chain the chain from a food source to the ultimate consumer
Created by: cris