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This article reflects on the multiple worlds generated around waterscapes in the diverse Mapuche territory, Wallmapu. We contrast the responses of three Mapuche communities to external interventions and water availability in the Chimehuin and Lepá rivers in Argentina, and the Huenehue River in Chile. The comparison reveals the nature of Mapuche waterscapes, the tensions provoked by the global economy, and its impacts on water management. Mapuche communities establish an intersubjective relationship with water, securing and protecting their water supply. Waterscapes are constituted as living entities where human and nonhuman stories converge and on which biocultural memory is periodically enriched in its response to a changing environment. We conclude that coexistence between Mapuche and non-Mapuche worlds, however diverse the communities might be, is sustained through equivocal relations and partial connections. Established views of water management in Wallmapu could be greatly enriched by the Mapuche's views and practices. [ABSTRACT FROM AUTHOR]

Temperature increment is one of the most visible aspects of climate change. Reservoirs in northern Patagonia are the main location for rainbow trout cage aquaculture activities in Argentina and here, surface water temperature shows an increment that despite leading towards better growth rates, also provokes lack of ovulation, atresia and a partial or total absence of spawning during the breeding season. During the early life history, low survival rates at hatching and first feeding are also observed. The increase in market size (>2 kg) has changed management practices, minimizing the difference between brood stock and individuals destined for consumption. Thus, the present situation differs deeply from carrying capacities forecasted few years ago and this analysis attempts to contribute to management policies including the idea of adaptation to climate change in the making of decisions. [ABSTRACT FROM AUTHOR]