The Mystery of Plum Island Marsh

What did the scientists hypothesize about what was causing the decline in the fish populations?

Make a claim that answers the scientific question: Is there any evidence that mudsnails are causing the decline in fish populations through their effects on invertebrate populations?

What evidence was used to write your claim? Reference specific parts of the table or graphs.

Explain your reasoning and why the evidence supports your claim. Connect the data back to what you learned about the salt marsh food web and how fertilizer may affect the system.

Did the data support Harriet’s “mudsnail hypothesis”? Use evidence to explain why or why not. If you feel the data was inconclusive, explain why.