Final answer:
Bogs have low net primary productivity due to low nitrogen and oxygen levels, while swamps provide habitat for various species.
Explanation:
Bogs are the freshwater ecosystem with low net primary productivity due to low nitrogen and oxygen levels. They have stagnant water, a lower pH, and lack nitrogen, limiting plant growth. On the other hand, swamps and freshwater marshes have a slow and steady water flow, providing habitat and nourishment for various species.
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