| S.No. | Aquatic Ecosystem | Terrestrial Ecosystem |
| (i) | Aquatic ecosystem exists on water covering 71 % of the earth surface. | Terrestrial ecosystem exists on land covering 29% of the earth surface. |
| (ii) | Aquatic animals use 20% of energy to obtain oxygen. | Terrestrial animals use only 1-2% of energy to obtain oxygen. |
| (iii) | n this ecosystem there is abundant of Water with limited oxygen supply | In this ecosystem there is less availability of water, greater availability of gases and temperature fluctuation. |
| (iv) | The small drifting photosynthetic | The primary producer is the plant that produce food through photosynthetic process. |
| (v) | Aquatic environment is more stable with smaller fluctuation in temperature and other variable. | Terrestrial environment is quite unstable as the land surface is affected by great risks from external impacts. |
