Chapter 7, Problem 8STP

Summary Introduction

Introduction : Caulerpa taxifolia has become an invasive species in coastal areas of North America. It has displaced the natural aquatic plants and the infestation has grown beyond control.

Answer to Problem 8STP

Correct answer :

The correct answer is option D. It out competes native species for resources.

Explanation of Solution

Explanation/justification for the correct answer:

Option D. Caulerpa taxifolia is seaweed, a common alga that has become an invasive species in some coastal areas of North America. It is native to Pacific Ocean and Caribbean Sea. The invasive strain suppresses the growth of native algae by out- competing native species for food and light. That is why it is also known as killer algae.

Explanation for incorrect answer:

Option A. It is dangerous to humans- It produces a toxin substance but is not dangerous to humans. It is toxic to other sea creatures. Hence this is not a correct option.

Option B. It is nonnative to the area- Yes it is nonnative to some coastal areas of North America but it is invasive because it competes with other species of seaweed. Hence this is an incorrect option.

Option C. It grows slowly and invades over time- Caulerpa taxifolia is one of the fastest growing algae. It can grow by small fragments at a very fast rate. Hence this is an incorrect option.