Final answer:
Pantano (swamp/wetlands) is the less productive freshwater ecosystem compared to arroyos (braided rivers).
Explanation:
Pantano (swamp/wetlands) is the less productive freshwater ecosystem compared to arroyos (braided rivers). While arroyos have a faster flow and can support more diverse habitats and aquatic life due to their oxygenated water, pantanos have stagnant water with low oxygen levels that limit productivity.
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