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- the place where an organism lives - an area that provides an organism with its basic needs for survival |
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the study of interactions among organisms and their environment |
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a close and often long-term interaction between different biological species |
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organisms of one species living together in the same place at the same time |
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all of the populations in an ecosystem |
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an organism that feeds on others - it has other organisms below it on the food chain |
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an organism that is food for others - it has other organisms above it on the food chain |
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when different individuals perform different tasks required for the survival of the entire group |
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organisms that use an outside energy source to make energy rich molecules (food) |
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- an organism that obtains energy by feeding on other organisms or their remains. |
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anything that limits the number of individuals living in a population |
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The role a species plays within a community |
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a type of symbiotic relationship that benefits both species |
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a type of symbiotic relationship that benefits only one of the species |
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a type of symbiotic relationship that benefits one species and harms the other |
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a relationship in which one organism eats the other for food |
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growth by doubling - "the larger the population gets, the faster it grows" |
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the largest number of individuals of one species than an ecosystem can support over time |
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the simple model of a feeding relationship in an ecosystem |
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when two or more organisms need the same resource at the same time - it is highest between members of the same species |
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- the zone of life on Earth - the top portion of the Earth's crust, all the water that covers Earth's surface, and the surrounding atmosphere |
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plant eaters such as deer and rabbits |
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organisms that eat both plants and animals |
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meat eaters such as tigers and frogs |
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consists of all the organisms living in an area and the nonliving features of the environment |
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the scientific study of LIFE. |
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a large area or geographical region with distinct plant and animal groups adapted to that environment |
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when individuals or groups of organisms compete for similar resources such as territory, mates, water and food. |
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an organism that obtains nutrients by consuming dead and decaying organic matter. |
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meat eaters - at or near the top of the food chain |
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plant eaters - the second step of the food chain, just above producers |
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plants or algae - the first step in a food chain |
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a way of showing all possible feeding relationships in a community |
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the amount of energy that gets transfered to each level of an energy pyramid |
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a simple model that shows feeding relationships in an ecosystem. ex. plant is eaten by mouse, mouse is eaten by snake, snake is eaten by hawk |
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a model of feeding relationships that shows that organisms lower on the food chain occur in higher numbers than those at the top |
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