Food chains or food webs have hierarchies of predatory levels {trophic level}, by organism sizes. For example, ocean algae phytoplankton are at Level 1. Krill zooplankton are at Level 2. Haddock, sardine, anchovy, and herring are at Level 3. Whiting, snapper, and halibut are at Level 4. Cod and tuna are at Level 5. Saithe are at Level 6. Higher levels grow more slowly.
Biological Sciences>Ecology>Community>Food Chain
4-Ecology-Community-Food Chain
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Date Modified: 2022.0224