Top-down effects imply control through predation, including fishery, while
bottom-up effects imply control through food abundance, often thought to be driven by climate or nutrient load.
The top-down effect refers to a higher trophic level influences the community structure of a lower trophic level through predation.
The bottom-up effect means that a lower trophic level in the biological network affects the community structure of higher trophic levels by means of resource restriction
Learn more about Top down and bottom up regulation here:
https://brainly.com/question/18996262
#SPJ4
