Chapter 3, Problem 36A

Summary Introduction

To determine:

Compare intertidal zone with photic zone in terms of tidal effect.

Introduction:

The sea is divided into many zones, depending on the resource distribution. On the basis of light, they are divided into photic and aphotic zone.

Explanation of Solution

The intertidal zone, when covered with water, harbors a variety of marine animals. When the tide goes out, some of these animals such as fish and crabs, retreat to deeper waters, whilst others, such as marine worms and the mud snail and other mollusks, stay behind and burrow in the moist sand. The tidal effect is less in the mid ocean zone. Hence, the photic zone have less tidal disturbance and more stable ecosystem.