In trophic chains, any change that affects any of the links will directly affect the superior and the immediately anterior link. Option D. damselfish.
What is a tropic chain?
The trophic chain is a relationship between different organisms, through which occurs transference of energy. The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at each level feed on the preceding one and become food for the next one.
- The first link corresponds to a producer organism -autotroph-.
- The following links are the consumers -heterotrophs-: herbivores, carnivores, and omnivores.
- The last links are the decomposers that degrade organic matter from dead organisms.
All organisms are equilibrated until a change occurs. When the change affects any of the involved links, there can be a cascade effect on the chain.
A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link, populations that are directly influenced by the affected link.
According to the proposed food chain, if the shrimp population decreases, damselfish would be the first population to decline. Option D.
This is because damselfish feeds on shrimps. If shrimps are missing, damselfish will be affected by the lack of food.
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