Food chains and food webs are methods of describing an ecosystem by describing how energy flows from one species to another. First proposed by the English zoologist Charles Elton in 1927, food chains and food webs describe the successive transfer...

All organisms, dead or alive, are potential food sources for other organisms. A caterpillar eats a leaf, a robin eats the caterpillar, a hawk eats the robin. Eventually, the tree and the hawk also die and are consumed by decomposers. Organisms in an...

There is no waste produced in a functioning, thriving natural ecosystem. All organisms, dead and alive, are potential sources of energy and nutrition for other members of the environment. For example, a worm digests tiny soil nutrients; a robin eats...

The series of interactions that occur among organisms in efforts to obtain food and energy. Because of energy loss in each transfer, most food chains involve only four or five links from beginning transfer of energy from primary producers through a...

Food chains, food webs and/or food networks describe the feeding relationships between species to another within an ecosystem. Organisms are connected to the organisms they consume by arrows representing the direction of biomass transfer. Typically a...

Food chain Save-A-Lot moving up, moving into old supermarket stores By TOM DAYKIN of the Journal Sentinel staff Friday, February 16, 2001 When a 65,000-square-foot Pick 'n Save supermarket closed this week at Silver Mill Shopping Center on Milwaukee's...

How big business bought up the ethical market You can play a game with the trendy food products on supermarket shelves. It's called "spot the owner". What you're looking for - when you scan the tin, tub or pack in your hand -...

Tests that determine whether toxic chemicals accumulate in food may be missing some hazardous materials and need to be updated, a Canadian researcher said Thursday.It has long been known that toxins can accumulate in the food chain, rising to higher concentrations as larger animals eat...

A red shrimp found in Lake Erie and two other Great Lakes has scientists concerned they could threaten the food chain.A small, half-inch creature, the red mysid is near the bottom of the food chain. Big fish eat them and they compete with small fish...