Terms : Hide Images
| 7290848553 | ecological community | a group of actually or potentially interacting species living in the same place | 0 | |
| 7290848554 | community level interactions | when the interaction between two species leads to changes in the presence or absence of other species or to a large change in abundance of other species, then a community effect is said to have occurred | 1 | |
| 7290848556 | food chain | the linkage of who feeds on whom | 2 | |
| 7290848557 | food web | a network of who feeds on whom or a diagram showing feeds on whom | 3 | |
| 7290848558 | trophic level | in an ecological community, all the organisms that are the same number of food-chain steps from the primary source of energy | 4 | |
| 7290848559 | autotroph | an organism that produces its own food from inorganic compounds and a source of energy | 5 | |
| 7290848560 | carnivore | organisms that feed on other live organisms; usually applied to animals that eat other animals; a meat eater. | 6 | |
| 7290848561 | herbivore | an organism that feeds on an autotroph; a plant eater | 7 | |
| 7290848562 | omnivore | organisms that eat both plants and animals | 8 | |
| 7290848563 | decomposer | an organism that obtains its energy and nutritional requirements by feeding on dead organisms; or, a feeder on dead organisms. | 9 | |
| 7290848564 | producer | any of the various organisms which produce their own organic compounds from simple precursors and many of which are food sources for other organisms | 10 | |
| 7290848565 | primary consumer | an organism which is found near the very bottom of the food chain who consumes plant material | 11 | |
| 7290848566 | secondary consumer | an organism that feeds on primary consumers, usually a carnivore | 12 | |
| 7290848567 | tertiary consumer | a high-level consumer, which is usually the top predator in an ecosystem and/or food chain | 13 | |
| 7290848568 | carbon cycle | combined biochemical cycle of carbon, oxygen and hydrogen | 14 | |
| 7290848569 | nitrogen cycle | a complex biogeochemical cycle responsible for moving important nitrogen components through the biosphere and other Earth systems | 15 | |
| 7290848570 | nitrogen fixation | the process by which atmospheric nitrogen is converted to ammonia, nitrate ion, or amino acids | 16 | |
| 7290848571 | denitrification | the conversion of nitrate to molecular nitrogen by the action of bacteria (an important step in the nitrogen cycle) | 17 | |
| 7290848572 | phosphorus cycle | major biochemical cycle involving the movement of phosphorus throughout the biosphere and lithosphere; important because phosphorus is important to life and for plant growth | 18 | |
| 7290848573 | photosynthesis | synthesis of sugars from carbon dioxide and water by living organisms using light as energy; oxygen is byproduc | 19 | |
| 7290848574 | respiration | the complex series of chemical reactions in organisms that make energy available for use | 20 | |
| 7290848575 | aerobic | living or occurring only in the presence of oxygen | 21 | |
| 7290848576 | anaerobic | living, active or occurring in the absence of oxygen; without oxygen | 22 | |
| 7290848578 | zooplankton | small aquatic invertebrates that live in the sunlit waters of streams, lakes, and oceans and feed on algae and other invertebrate animals | 23 | |
| 7290848579 | phytoplankton | microscopic floating plants, mainly algae, that live suspended in bodies of water and that drift about because they cannot move by themselves or because they are too small or too weak to swim effectively against a current | 24 | |
| 7290848580 | keystone species | loosely speaking, a species, such as the sea otter, that has a large effect on its community or ecosystem so that its removal or addition to the community leads to major changes in the abundances of many or all other species | 25 | |
| 7290848582 | biological diversity | the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part | 26 | |
| 7290848586 | species | a group of individuals capable of species | 27 | |
| 7290848593 | species diversity | the number and variety of species found in a given area in a region | 28 | |
| 7290848598 | habitat | where an individual, population or species exists or can exist | 29 |
