Answer AND Explanation:
The various organisms that surround and interact with a particular organism constitutes its biotic environment. Salinity is the amount of salts dissolved in a given volume of water. It varies widely in various aquatic habitats. Animals in the pond are affected by the salinity of the water since some organisms survive in marine and freshwater habitats.
The amount of carbon dioxide available which is important for photosynthesis by aquatic plants. In addition, oxygen concentration necessary for respiration by aquatic organisms.
