Browsing by Author "Prieto, Manuel"

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    Andean peatlands at risk? Spatiotemporal patterns of extreme NDVI anomalies, water extraction and drought severity in a large-scale mining area of Atacama, northern Chile
    (2023) Chavez, Roberto O.; Meseguer-Ruiz, Oliver; Olea, Matias; Calderon-Seguel, Matias; Yager, Karina; Isela Meneses, Rosa; Lastra, Jose A.; Nunez-Hidalgo, Ignacio; Sarricolea, Pablo; Serrano-Notivoli, Roberto; Prieto, Manuel
    In the Andes, multiple human and climatic factors threaten the conservation of bofedales, a type of high altitude peat forming wetland widely distributed in the tropical and subtropical Andes. In northern Chile, climate change and water extraction for industrial activities are among the most significant threats to these relevant socio-hydrological systems hosting indigenous pastoral communities. In this study, we present an integrated anal-ysis of Normalized Difference Vegetation Index (NDVI) anomalies, drought severity and water rights granted to industry to provide insight on the conservation status of bofedales, historical drivers of their transformation, and current threats. Using Landsat satellite imagery from 1986 to 2018, we identify spatio-temporal NDVI changes of 442 bofedales in one of the leading copper producing regions of the world. The NDVI time series analysis over 32 growing seasons was used to detect extreme anomalies, i.e. values outside the 95 % of the reference frequency distribution, indicating periods of extreme changes in the productivity of these high Andes wetlands. To evaluate the relationship between bofedales NDVI extreme periods to drought and continued water extraction activities, we combine a climate-based multi-temporal-scale drought index (SPEI) with the geospatial latitudinal distri-bution of water rights granted for extractive industries in the study area. Over the time period of analysis, the total amount of granted water rights increased 465 % from 1,201 l/s recorded before 1985 to 5,584 l/s in 2018. In the areas where the highest amount of water rights are concentrated, i.e. between 21.3 degrees S and 22.1 degrees S, "green" bofedales (NDVI>=0.23) are practically absent. NDVI of the austral summer (JFM) was highly correlated with the severity of drought occurring during the three months of the growing season peak. While our findings show bofedal productivity is mostly influenced by precipitation and temperature of the wet season (JFM) during the study period, results also raise questions regarding possible bofedal loss occurring over the previous 80 years prior to the satellite record, wherein water extraction activities have significantly increased according to official records.
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    Nature Is for Trees, Culture Is for Humans: A Critical Reading of the IPCC Report
    (2021) Matus Cánovas, Claudia; Bussenius Méndez, Pascale; Herraz Mardones, Pablo Cristián; Riberi Manzur, Valentina Constanza; Prieto, Manuel
    In this article, we problematize conventional views regarding culture presented in the assessment report entitled Climate Change 2014: Impacts, Adaptation, and Vulnerability. This report is a contribution to the Fifth Assessment Report produced by the Intergovernmental Panel on Climate Change (IPCC). We posit that when culture is seen as a stable category and imagined as a space composed of humans-and, more precisely, only certain humans-an epistemological, ontological, and ethical order is reproduced in which (a) nature is framed as a passive and apolitical "out there ", (b) knowledge based on this division is misleading and partial (e.g., social scientists study culture and natural scientists study nature), and (c) dominant humanist assumptions become common-sense explanations for inequalities. We conduct a critical discourse analysis of the IPCC report to better understand which assumptions produce the conceptualization of culture as a stable category. In our conclusion, we offer an example of a semiotic-meaning intervention of a section of the report to demonstrate the vitality of the concepts presented in this document. Subsequently, we discuss the consequences of omitting the vital traffic between the biological, social, and cultural realms from discussions on climate change to reexamine the production and reproduction of inequalities.
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    The Production of Empty Space and Deserts in the South-Central Andean Highlands
    (2024) Aliaga, Monica Meza; Prieto, Manuel; Diaz, Paulina Rodriguez; Aliaga, Michel Meza
    Imaginaries serve as the foundational framework shaping representations and influencing societal perspectives, subsequently guiding specific practices. Within the realm of geographical imaginaries, this article adopted a geohistorical perspective, using periodicals, secondary sources, and contemporary digital media to shed light on the geography of the highlands of northern Chile. Our objective was to emphasize the representations that have discouraged the occupation of these mountainous regions. Our findings revealed the emergence of a geographic imaginary that attributes desert-like qualities to the entire northern region of Chile, extending beyond the "unpopulated area of Atacama". This misleading characterization fails to distinguish desert areas from the topographic variations existing between the Andes and the Pacific coast. These representations, which have translated into depopulation practices, have stigmatized the highland areas as synonymous with desolation and inhospitality, seemingly unsuitable for daily life, social production, and reproduction potential. Consequently, both spaces and individuals have been objectified for development, perpetuating the capitalist system as the dominant mode of production.