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| The scientific study of interactions among organisms and between organisms and their environment, or surroundings. |
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| Contains the combined portions of the planet in which all life exists, including water and air, or atmoshpere. |
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| A group of organisms so similar to one another that they can breed and produce fertile offspring |
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| Groups of individuals that belong to the same species and live in the same area |
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| Assemblages of different populations that live together in a defined area |
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| A collection of all the organisms that live in a particular place, together with their non-living, or physical, environment |
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| A group of ecosystems that have the same climate and similar dominant communities |
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| Organisms that can capture energy from sunlight or chemicals and use that energy to produce food |
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| Organic molecules that combine and recombine to produce living tissue |
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| Autotrophs use light energy to power chemical reactions that convert carbon dioxide and H2O into oxygen and energy-rich carbohydrates( sugars & starches) |
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| Organisms use chemical energy to produce carbohydrates |
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| Organisms that rely on other organisms foir their energy and food supply |
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| Another name for HETEROTROPHS |
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| Feed on plant and animal remains and other dead matter (called detritus) |
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| A group of heterotrophs that breaks down organic matter |
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| A series of steps in which organisms transfer energy by eating and being eaten |
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| A term for feeding relationships in an ecosystem that form a network of complex interactions |
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| Each step in a food chain or food web |
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| A diagram that show the relative amounts of energy or matter contained within each trophic level in a food chain or food web |
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| A total amount of living tissue within a given trophic level |
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