The Following Figure Shows Studies in a Stream Where Enclosures

question 31

Multiple Choice

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.

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