Critical Thinkign Questions Chapter 14 (Page 323)
Quetion #3. There are only a few reefs off the northeast coast of Brazil (see map in Fig. 14-11), even though it lies in the tropics. How would you explain this?
According to the text book corals can grow only in shallow water, where light can penetrate because the zooxanthellae on which they depend need light. Calcareous algae require sunlight as well. Particular types of corals and algae have different depths limits. Some can live in deep water and others can't. In addition, the book indicates that there are many corals that live in deep water and does not need sunlight, because they do not contain zooxanthellae or bulid massive reef structures.
Quetion #3. There are only a few reefs off the northeast coast of Brazil (see map in Fig. 14-11), even though it lies in the tropics. How would you explain this?
According to the text book corals can grow only in shallow water, where light can penetrate because the zooxanthellae on which they depend need light. Calcareous algae require sunlight as well. Particular types of corals and algae have different depths limits. Some can live in deep water and others can't. In addition, the book indicates that there are many corals that live in deep water and does not need sunlight, because they do not contain zooxanthellae or bulid massive reef structures.
Thereforth, to answer the question, the northeast coast of Brazil illustrated on Fig. 14-11 page 304 indicates that although Brazil lies in the tropics, the water temperature does not coincide with the climate of the tropics. Leaving Brazil with a few corals due to less light penetration and water temperature ratings.
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