Figure 2.

Seasonal calendar of climatic cycles and cultivation activities in ribeirinho communities located on (a) várzea and (b) paleovárzea in the middle Solimões River. Annual rise or ebb of the water level in rivers, lakes and streams occurs gradually. During repiquetes this gradual change is interrupted by more abrupt changes in the opposite direction. Marisummer is a short dry period of about two weeks that occurs during the winter. Darker colors indicate higher temperatures, river water level, amount of rainfall or intensity of cultivation activity. Arrows indicate changes in temperature, river level and rainfall reported by local residents. Dark circles indicate reported changes in climatic events (cold spells, Mari summer, repiquetes) or in cultivation practices (e.g., harvesting, planting).