Which risk increased within chinampa agriculture due to intensive maize cultivation around Tenochtitlan?

💡 Explanation

When intensive maize cultivation occurred on chinampas, nutrient runoff increased because high-density planting accelerated soil erosion, causing excess nitrogen and phosphorus to enter the surrounding lake waters, accelerating eutrophication. Therefore, eutrophication risk arose, rather than reduced salinity or altered currents, whose mechanisms are unrelated to cultivation methods.

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