Asked was ""Are there situations where you can't create a natural food chain? If so, what are they?"" A natural food chain should develop where ever fish are able to survive long term. The main differences will be in the type of food chain and amount of natural food (fertility) that will be produced within the system to sustain a fishery. Stocking new or different species (invertebrates and fish) into a water body can sometimes result in additional foods that are available. When chosen wisely, new additions will enhance the aquatic food web. Supplemental feeding and or fertilizing boosts or increases the amount of fish pounds per acre that can live in that water body.
In systems where a natural food chain will not develop are instances where the habitat has been compromised or impacted by some form of contamination usually chemical; pollution of some sort. In these instances fish are also not able to survive long term.
