Be able to classify organisms as either plankton, nekton, or benthos. It is important to understand the relationship between marine organisms and their environment. For example, coral reefs are the most diverse marine environments, and yet they are low in nutrients. Conversely, salt marshes have abundant nutrients and high productivity, but have low diversity. You should look at how organisms adapt to live successfully in the marine environment.
Marine biology is the study of organisms that happen to be marine.
The focus is on the organisms themselves. Biological oceanography is the study of the relationships between marine organisms and the marine environments where they are found. Marine Organisms and Their Environment a. The marine environment is more stable than the terrestrial environment in terms of temperature and other factors. Euryhaline organisms tolerate a wide range of salinities.