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Unit 7- Food Webs

Vocabulary for Food Webs~Energy Flow in Ecosystems Notes

QuestionAnswer
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.
Created by: MsLogan
 

 



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