Chinampas
Chinampas are an ancient highly productive agricultural growing system originated from Mexico. The system includes a design of half water space and half land growing space maximizing the edge effect of growing productivity. This also helps with keeping crops well watered and with a steady supply of nutrients (if supplied by the flowing waters). The Chinampa system can also include the growing of the aquatic life which also in turn is using the highly productive edge effect.
Reference: http://www.ancient-origins.net/ancient-places-americas/chinampas-floating-gardens-mexico-001537