The following figure shows studies in a stream where enclosures were set up either with trout or with no trout.Which statement is a correct interpretation of the graph about trout,invertebrates,and algae?
A)If trout are present in a system,algae production is low and invertebrate population levels are also low.
B)If trout are present in a system,algae production is high and invertebrate population levels are also high.
C)If trout are present in a system,algae production is high and invertebrate population levels are low.
D)Trout do not seem to affect the algae production; only the invertebrate populations are affected.
E)Trout do affect the algae production but not the invertebrate populations.

Question

The following figure shows studies in a stream where enclosures were set up either with trout or with no trout.Which statement is a correct interpretation of the graph about trout,invertebrates,and algae? 
A)If trout are present in a system,algae production is low and invertebrate population levels are also low. 
B)If trout are present in a system,algae production is high and invertebrate population levels are also high. 
C)If trout are present in a system,algae production is high and invertebrate population levels are low. 
D)Trout do not seem to affect the algae production; only the invertebrate populations are affected. 
E)Trout do affect the algae production but not the invertebrate populations.

Quizplus · Accepted Answer

The graph shows that in systems where trout are present, there is a low level of invertebrate population and high level of algae production, which means that trout predators are affecting the invertebrates and allowing the algae population to increase. Therefore, option C is the correct interpretation of the graph.

The Following Figure Shows Studies in a Stream Where Enclosures