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. Keywords: biocultural memory, equivocal relations, Mapuche waterscapes, partial connections, pluriverse.

In recently deglaciated soils, microbial organisms drive soil transformations by increasing carbon (C) and nitrogen (N) pools while depleting available phosphorous (P), thus improving plant colonization and soil development. However, the rate of soil development can vary in response to local environmental conditions that affect microbial abundance and activity. In this contribution we use observational and experimental approaches to evaluate the interplay between soil biogeochemical features and microbial abundance and function after approximately seventy years of soil development in the forefield of the Exploradores Glacier that is located at the northernmost end of the Northern Patagonian Ice Field. Our findings suggest that after approximately seventy years of soil development, microbial abundance and soil C and N accumulation increase with soil age, soil bulk density and pH decreased, and microbial activity measured as soil chlorophyll a and nifH gene abundance increased. In turn, decomposition increased with fungal abundance, showing higher values in the late stages of soil development where the soil C:N ratio was higher and soil pH was lower. Overall, biogeochemical changes along this chronosequence followed the predicted pattern, with gradual increases in soil nutrients and microbial abundance, in addition to decomposition processes.

Citizen science and community-based monitoring are based on the participation of people outside research institutes in the collection and sometimes also analysis of scientific data. Most of the literature on this practice focuses on the benefits for science and society or the accuracy of the data. Recently, a few studies have stressed the need to also reflect on other aspects to prevent adverse impacts, especially when these approaches are applied in the Global South. Herein, we discuss our experiences in implementing the use of a citizen science app for hydrological data collection in community-based water monitoring in five countries in Latin America. In each country, we collaborated with a community-based water monitoring group and held workshops to describe and explain the use of the app. We learned that direct communication with users improves the use of the app but a mismatch of goals between users and scientists and technological barriers can limit the use of the app, and inclusive data management practices are required to ensure that users’ needs are met. The critical evaluation of our experiences and lessons learned contributes to methodological recommendations for better citizen science practices that are particularly useful for other (global) citizen science projects that want to collaborate with community-based monitoring groups in Latin America.

Recent international recognition of indigenous peoples, their rights and contributions to solving current challenges has directed academic attention to the way research is conducted in relation to them, what topics are studied, by whom, and using which methodologies. The Mapuche are the most numerous indigenous peoples in South America and have ancestrally inhabited a territory denominated Wallmapu. This study undertook a comprehensive revision and meta-analysis of the scientific literature related to the Mapuche and Wallmapu. Through quantification and visualization of the scientific landscape, the goal was to enhance the understanding of the themes and patterns that have guided research in this field of study. We found 1611 documents in Web of Science and SciELO collections published between 1975 and 2020. Using CiteSpace software, we analyzed the main conceptual hotspots, identified central authors and pivotal works, among other aspects of the scientific knowledge domain. The main research themes found revolve around political and historical aspects of the relationship between Mapuche and the State; ethnobotanical research including plant properties and cultural knowledge transmission; and the indisputable connection between indigenous resistance and environmental depredation. We argue that valuing cultural diversity paves the road for reclaiming indigenous knowledge as a contribution to our understanding of the world.