Each food chain is a descriptive diagram including a series of arrows, each pointing from one species to another, representing the flow of food energy from one feeding group of organisms to another.
What is a Food web?
- Food web is conceptual tool that illustrates the feeding relationships among species within a community, community structure revealing species interactions and understanding the dynamics of energy transfer in an ecosystem.
- It implies the transfer of food energy from its source in plants through herbivores to carnivores.
- Normally, food webs contains a number of food chains meshed together.
- There are two sorts of food chains: the grazing food chain, beginning with autotrophs, and therefore the detrital food chain, beginning with dead organic matter.
- Energy and nutrients move from plants to the herbivores consuming them, and to the carnivores or omnivores preying upon the herbivores, In a grazing food chain.
- In a detrital food chain, dead organic matter of plants and animals is weakened by decomposers, e.g., bacteria and fungi, and moves to detritivores then carnivores.
- Example: Grasshoppers prey on plants; scorpions prey on grasshoppers; kit foxes prey on scorpions. While the food cycle showed here is a simple one, most feed webs are complex and involves species with both weak and strong interactions among them. For instance , the predators of a scorpion during a desert ecosystem might be a golden eagle, an owl, a roadrunner, or a fox.
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