What do you think, what will happen if all the fish in a pond die? How will it affect the pond Ecosystem?

Once all the fish in a pond die, all that decomposing organic matter will trigger a process of eutrophication of the pond, which in turn could cause a progressive growth of the surface vegetation of the pond, reducing or even preventing the entry of rays. from the sun, which in turn will reduce the dissolved oxygen in the pond and restrict the survival of other aquatic organisms whose subsistence requires oxygen, destabilizing the ecosystem.

Explanation:

All living beings are made of organic matter with high concentrations of nitrogen, which is why, once a large number of living beings, whether animals or plants, perish in a pond, they will lead to a saturation of elements called eutrophication, This will allow the surface plants to grow at an accelerated rate and, although this might be seen as beneficial at first, the truth is that once the plants cover the surface of the pond, they will prevent the sun's rays from entering the pond, the time that different organisms or photosynthetic microorganisms will not be able to carry out their process, drastically reducing the dissolved oxygen in the pond and restricting the survival of any living being that requires oxygen within it, which can be taken as a total imbalance of the ecosystem that could bring to an end the biotic component of it.

what is the other part to the question

answer; can each be concretely realized in different ways;