1. Salinity: This refers to the salt content of the water. Marine organisms have adapted to live in a specific range of salinity, and deviations from this range can be detrimental. For instance, freshwater fish cannot survive in saltwater, and vice versa.
2. Dissolved Oxygen: Oxygen is crucial for respiration, which is essential for all living organisms. While the ocean contains dissolved oxygen, the amount can vary depending on factors like temperature, depth, and water movement. Marine organisms have adapted to utilize the available oxygen in their environment, with some being more efficient at extracting oxygen from low-oxygen environments.
These two factors are essential for the survival of marine organisms, and their interaction plays a significant role in shaping the distribution and abundance of different species throughout the world's oceans.
