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Food chain in a Swedish lake. Osprey feed on northern pike, which in turn feed on perch which eat bleak which eat crustaceans.. A food chain is a linear network of links in a food web, often starting with an autotroph (such as grass or algae), also called a producer, and typically ending at an apex predator (such as grizzly bears or killer whales), detritivore (such as earthworms and woodlice ...
A pyramid of energy or pyramid of productivity shows the production or turnover (the rate at which energy or mass is transferred from one trophic level to the next) of biomass at each trophic level. Instead of showing a single snapshot in time, productivity pyramids show the flow of energy through the food chain. Typical units are grams per ...
A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
The following 10 pages use this file: Food pyramid (nutrition) History of USDA nutrition guidelines; MyPyramid; Talk:Veganism/Archive 5; User:Lbockhorn/sandbox
In order to more efficiently show the quantity of organisms at each trophic level, these food chains are then organized into trophic pyramids. [1] The arrows in the food chain show that the energy flow is unidirectional, with the head of an arrow indicating the direction of energy flow; energy is lost as heat at each step along the way. [2] [3]
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Food pyramid may refer to: Food pyramid (nutrition) , one of many pyramid-shaped nutrition guides used around the world Food pyramid (food chain) , a graphic representation showing the ecological interrelationship between producers and consumers
The USDA's food pyramid from 2005 to 2011, MyPyramid. The USDA food pyramid was created in 1992 and divided into six horizontal sections containing depictions of foods from each section's food group. It was updated in 2005 with black and white vertical wedges replacing the horizontal sections and renamed MyPyramid. MyPyramid was often displayed ...