Which living thing in the pond system break down dead plants and animals?

The living things in a pond system that break down dead plants and animals are called decomposers. These are primarily bacteria and fungi.

Here's why they're so important:

* Nutrient Cycling: Decomposers break down the complex molecules in dead organisms into simpler substances like nitrates, phosphates, and carbon dioxide. These nutrients are then released back into the pond system, making them available for plants to use.

* Waste Removal: Decomposers help clean up the pond by breaking down waste products like fish droppings and decaying leaves.

* Maintaining Balance: Decomposers play a vital role in keeping the pond ecosystem in balance. Without them, dead organisms would accumulate, leading to an unhealthy environment.

Some common decomposer organisms in pond systems include:

* Bacteria: Found in large numbers in the water and sediment, they are very efficient at breaking down organic matter.

* Fungi: Can be found on dead plants and animals, as well as in the sediment.

* Some invertebrates: Like earthworms and certain types of insects, also contribute to decomposition.

Let me know if you'd like to learn more about any of these organisms!