If fertilization in one species in an ecosystem stops and the process represents the only way such a species reproduces, the effect it will have on the ecosystem will depend on the niche the species occupy within the ecosystem.
The cessation of fertilization means that there would be a discontinuity in the population of such a species. In order words, the population of the species will sooner or later go extinct from the ecosystem.
The position and role the species play in the ecosystem become vacant and this will, in turn, affect processes such as the food chain/food web and may even affect other processes such as biogeochemical cycles.
Organisms that depend on such species solely for food will either have to adapt to eating another food or also risk going out of extinction while those they feed on might end up thriving than usual.
In other words, the species equilibrium of the ecosystem will shift as a result of the multiplier effect of the absence of a single species.
More on ecosystem equilibrium can be found here: https://brainly.com/question/23469615?referrer=searchResults
