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Unit 7- Food Webs
Vocabulary for Food Webs~Energy Flow in Ecosystems Notes
| Question | Answer |
|---|---|
| Ecosystem | all the living(biotic) and nonliving(abiotic) things in an area. A single ecosystem may contain many habitats. |
| Producer | an organism that can make its own food (by photosynthesis) ex-trees/plants/flowers/algae Producers are the source of all food in ecosystems. |
| Consumers | organisms that cannot make their own food and depend on producers for food and energy. They are classified as: Herbivores-consumers that eat plants Carnivores- eat animals Omnivores- eat both plant & animals |
| Scavenger | a carnivore that feeds on the bodies of dead organisms ex:vulture/dead deer |
| Decomposers | organisms that break down wastes and dead organisms and return the raw materials to the environment ex: fungi, (mushrooms)bacteria,some insects & snails |
| food chain | a series of events in which one organism eats another and obtains energy. The first organism in a food chain is always a producer. |
| first level consumer (aka=primary consumer) | The second organism is a consumer that eats the producers |
| second level consumer (aka=secondary consumer) | consumer that eats the first level consumer. |
| food web | A more realistic way to show the flow of energy through an ecosystem that consists of the many overlapping food chains in an ecosystem. |
| energy pyramid | shows the amount of energy that moves from one feeding level to another in a food web. |
| trophic level | feeding level in a an energy pyramid |
| habitat | The place where an organism lives and that provides the things the organism needs A single ecosystem may contain many habitats. |
| biotic factors | The living parts of an ecosystem. In the forest ecosystem biotic factors include: mushrooms, rabbits, termites, trees and flicker birds. |
| abiotic factors | The nonliving parts of the ecosystem. They include: water, sunlight, temperature and soil. |
| species | a group of organisms that are physically similar and can reproduce with each other to produce fertile offspring. |
| population | All of the members of one species in a particular area |
| community | All of the different populations that live together in an area. To be considered a community, the different populations must live close enough together to INTERACT. |
| symbiosis | a close relationship between two species. The 3 types of symbiotic relationships are: Mutualism Commensalism Parasitism |
| Mutualism | a relationship in which both species benefit |
| Commensalism | a relationship in which one species benefits and the other species is neither helped nor harmed. |
| parasitism | a close relationship that involves one organism living on or inside another organism and harming it. The parasite benefits from the interaction while the host is harmed. |