Chapter 21, Problem 10RQ

Summary Introduction

To review:

The comparison between the roles of microbes in photic and aphotic marine communities.

Introduction:

The salt concentration is quite high in the marine and ocean ecosystems. The major ions present are Na+ and Cl- with some concentration of sulfate and iodide. It varies widely with different factors like pressure, penetration of light, temperature, and organic material concentration. Based on these factors, the water column is divided into different regions.