Although the trophic level of a consumer can be determined by following the longest feeding chain ... stream food web consists of two basal food resources (algae and detritus) and four species ...

Remember, food chains do not show the number of organisms at each trophic level. Pyramids of number are not always perfect pyramids because of large organisms at the bottom and small ones at the top.

Food web is an important conceptual tool for illustrating the feeding relationships among species within a community, revealing species interactions and community structure, and understanding the ...

Here is a pyramid of biomass that represents this food chain. Scientists measured the biomass of each trophic level of this food chain. Their values are recorded in the table below.

At their position atop the food chain, they feed mostly on large prey, usually four-legged herbivores ... We eat plants too, which complicates our "trophic level," or position in the food web.