How would you best classify most of the microbes from marine environments that cannot be isolated?

Question

Quizplus · Accepted Answer

Marine environments are often oligotrophic, meaning they have low nutrient availability. Many microbes in these environments have adapted to these conditions and are specialized for obtaining nutrients from the limited resources available. As a result, they may not be able to grow in typical laboratory culturing conditions, making them difficult to isolate. Therefore, most of the microbes from marine environments that cannot be isolated can be classified as obligate oligotrophs.

How Would You Best Classify Most of the Microbes from Marine