1. which biotic factors do you see in the photo? 2. which abiotic factors can you detect in this photo? 3. in what ways does one biotic factor interact with the abiotic factors? 4. pick one biotic factor and change it dramatically somehow. how will this change affect the aquarium? 5. pick one abiotic factor and change it dramatically somehow. how will this change affect the aquarium?

1. Biotic components of the ecosystem refer to all the living organisms present in the ecosystem. So, fishes and plants would be the biotic components.

2. Abiotic components of the ecosystem refer to the physical or non-living component of the ecosystem. Thus, water and rocks would form the abiotic component of the given ecosystem.

3. The biotic and abiotic components are linked through energy flow and biogeochemical cycles. For example, fishes get oxygen from water and excrete their waste product in the water. Similarly, plants also get carbon dioxide and water for photosynthesis from the abiotic component.  

4. Change in the biotic component would disturb the whole ecosystem. For example, if plants are reduced or removed from the ecosystem, enough amount of food and oxygen would not be produced. Similarly, if the number of fishes is increased to a large number, then it might be difficult for the ecosystem to sustain for a long time.

5. The abiotic component is also essential for the ecosystem. Any change in the abiotic component can produce severe effects on the ecosystem. For example, if water is removed or highly polluted then the living organisms would not be able to survive in the ecosystem.