Lecture17FoodWebs

Lecture17FoodWebs - 1. What is a food web? A food web...

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Unformatted text preview: 1. What is a food web? A food web describes the (often complex) feeding relationships among organisms in an ecosystem food web = A complex of interrelated food chains in an ecological community (dictionary.com) food chain = linear arrangement showing the transfer of energy and organic materials through various trophic levels of marine organisms trophic level = the feeding level in a food web; composed of organisms that obtain their energy in a similar manner Apex predator Primary Producers Primary consumers Secondary consumers Tertiary consumers 2. What are the main components of food webs? phytoplankton ciliates,copepods, salps chaetognaths jellyfish, fish Sharks, sea otters, whales Size increases Number decreases Growth rates decrease 3. How are materials transferred through food webs? Trophodynamics = the study of the factors that affect the transfer of materials between trophic levels Herbivores eat plants only (primary consumers) Carnivores eat animals only Omnivores eat both plants and animals Detritivores eat dead organic matter...
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Lecture17FoodWebs - 1. What is a food web? A food web...

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