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What is a "top-down impact" in terms of ecology?
Im trying to figure out what a top-down impact is in an ecology class.
The questions is : If urbanization causes the disappearance of top level predators. what would the top-down impact be?
The top-down impact of that would be that the lower-level consumers would be unregulated grow in population feasting on even lower creatures until the population would grow too large or there would be a food shortage. Eventually, the system would re-establish itself as the unregulated species reached population equilibrium; this can take a long time though. Basically, it just means that a top level of consumers is wiped out, and the lower level consumers go crazy until they die.
ZZ Top - La Grange (From "Double Down Live)