Catalina Rico Lenta and Ana Ladio built their study around farmers who sell at the Nahuel Huapi Family Farmers’ Market, a hub of local food production in the Argentinian Andes. Drawing on extensive ethnobiological fieldwork, the researchers organized a participatory workshop in which farmers identified and ranked the Components of Change, or CoC, affecting their productive systems. Rather than treating drought, market pressures, or invasive species as isolated problems, participants described them as interconnected strands of a single web, each capable of triggering consequences that ripple across soils, water, crops, livestock, and household economies.

To translate this systemic local perspective into a measurable framework, the team developed a novel tool: the Locally-Anchored Impact Index, or LAII. The index integrates two dimensions for each Component of Change: the perceived severity of its impact and its degree of interconnectivity within the broader socioecological system. This approach represents a deliberate departure from conventional vulnerability indices that rely solely on external expert judgments or remotely sensed data. By weighting severity with connectivity, the LAII captures the cascading quality of risk, identifying which pressures are most likely to propagate disruption through the entire farming system.

The results are striking. Surface and groundwater flow dynamics and drought emerged as the most influential Components of Change, ranking highest in both perceived severity and interconnectivity. Water, in other words, functions as the central node of the regional risk network. Declining water availability does not merely stress irrigation; it reshapes pasture productivity, soil stability, forest health, fire regimes, and ultimately the viability of the family farm itself. The researchers found that climatic and ecological factors exerted a greater overall impact on the system than socio-economic pressures such as market volatility or land-use change, a finding that underscores how acutely environmental transformation is being felt on the ground.

One of the most consequential discoveries concerns the relationship between the diversity of adaptive practices and the magnitude of local impact. Higher values on the Locally-Anchored Impact Index were associated with a broader repertoire of adaptive responses, suggesting that farmers facing the most interconnected pressures have also developed the richest portfolios of strategies. Climatic Components of Change mobilized the widest range of responses of any category, while ecological and socio-economic pressures elicited distinct, more specialized sets of adaptation practices. This pattern supports a growing body of resilience theory holding that pathway diversity, the availability of multiple viable responses, is a key determinant of a system’s capacity to absorb disturbance without losing its essential functions.

Adaptation, in this context, is not a modern imposition but an extension of long-standing Local Ecological Knowledge, or LEK. The farmers’ responses are grounded in generations of local learning, experimentation, and knowledge exchange. Ethnobiological research in Patagonia has repeatedly documented how smallholders read animals, birds, and plants as ethno-indicators of environmental change, manage firewood and soil resources with detailed local taxonomies, and maintain agrobiodiversity as a buffer against uncertainty. The new study extends this tradition by showing that knowledge transmission pathways themselves differ according to the type of pressure at hand. Climatic stresses, ecological disturbances, and economic shifts each draw on distinct channels through which practices and insights move between generations and across families.

This finding carries significant implications for how adaptation policy is designed in rural Latin America and beyond. Much of the existing literature on farmer perceptions of climate change treats adaptation as a relatively uniform response to generalized climatic stress. The Patagonian evidence suggests instead that the social architecture of knowledge, who teaches whom, in what settings, and through which relationships, is integral to the adaptive process. Interventions that ignore these pathways risk delivering information in forms that never take root. Conversely, supporting existing knowledge networks, including the market institutions that bring farmers together, may be among the most cost-effective strategies for building regional resilience.

The broader context gives the findings added urgency. Recent research documents rising temperatures and shifting precipitation patterns across the North Patagonian Andes, projections of increasing fire probability under twenty-first-century climate scenarios, and accelerating land-use transformation around protected areas in both Argentina and Chile. Family farming systems in the region sit at the intersection of these pressures, contending simultaneously with a warming and drying climate, fire-driven pine invasions, volcanic ash events such as the 2011 Cordón Caulle eruption, tourism-driven development, and the economic precarity characteristic of smallholder agriculture throughout the Global South. The systemic perspective of local farmers, the study argues, is not folk wisdom to be accommodated but an analytically sophisticated account of precisely these cascading dynamics.

Methodologically, the LAII offers a transferable framework for participatory assessment of socio-environmental change in other regions where smallholder livelihoods depend on intimate knowledge of local ecosystems. Because the index is built from locally perceived severity and interconnectivity, it can be adapted to contexts as varied as Andean altiplano communities, African mountain regions, or Mediterranean watersheds, all places where comparable studies have shown that local knowledge reveals patterns invisible to conventional monitoring. The researchers emphasize that the approach treats family farmers as active agents rather than passive victims of change, in line with contemporary decolonizing currents in ethnobiology that position local communities as co-producers of environmental science.

For the farmers of the Nahuel Huapi basin, the study confirms what their daily experience already teaches: water is the thread that binds every risk together, and the knowledge networks that carry adaptive practices from one family to the next are as vital to survival as any well or canal. For scientists and policymakers, the message is equally clear. Effective adaptation will require tools that measure risk the way the people who live with it actually experience it, as a connected, cascading system in which the fate of a single stream can determine the fate of a farm, a market, and a way of life.

Subject of Research: Locally grounded assessment of cascading socio-environmental risks and adaptation in Patagonian family farming systems

Article Title: Cascading Socio-environmental Risks In Northern Patagonia: A Locally Anchored Assessment From Family Farming Systems

Article References: Rico Lenta, C., & Ladio, A. (2026). Cascading Socio-environmental Risks In Northern Patagonia: A Locally Anchored Assessment From Family Farming Systems. Environmental Management, 76(9), Article 306. https://doi.org/10.1007/s00267-026-02619-6

Image Credits: AI Generated

DOI: 10.1007/s00267-026-02619-6

Keywords: family farming, Northern Patagonia, water scarcity, Local Ecological Knowledge, participatory assessment, socio-environmental change, drought, adaptation strategies, resilience, ethnobiology, impact index, socioecological systems