Question

what would happen if there were no underwater plants like the hydrilla?

Answer 1

If there will be no underwater plants like hydrilla, then there will be no eco-system in the underwater its because the underwater animals are fully dependant on the underwater plant like hydrilla.

These plants are the daily food of the small under water species.

So, the conclusion is this that the hydrilla is the main way of maintaining the ecosystem of the underwater.

Answer 2

Answer:

Some species that survive only on eating hydrilla would die or change their diet. Others would be partially affected by it. There's more space for other water plants and over time both the vegetation fishes surviving on hydrilla would replenish. Some ponds ecosystems where hydrilla is the only plant will die out.