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Abstract. We studied the changes in geochemical variables in the middle section of Río de la Plata estuary during the 2009-2010 El Niño-Southern Oscillation (ENSO) event. Protein, organic matter, chlorophyll-a and phaeopigment content of surface sediments were significantly correlated with the increased continental freshwater input associated with high total monthly rainfall. During the warm-phase ENSO event, river flow was 5-fold larger than average historical levels, which led to a steady decrease in salinity values and the highest levels of geochemical variables. The evidence presented herein suggests that warm-phase ENSO events increase the trophic state of the sediments because of the increased freshwater input. Thus, our findings may be useful to anticipate potential eutrophication episodes in the study area.

Climate change and variability are known to have an influence on human wellbeing in a variety of ways. In Latin America, such forces are especially conspicuous, particularly in respect of extreme climatological, hydrological, and weather events (EWEs) and climate-sensitive disasters (CSDs). Consistent with the need to study further such connections, this paper presents an analysis of some of the vulnerabilities of environmental health issues and climate-related impacts that are focusing on EWEs and CSDs in Latin American countries. The research includes an analysis of the (i) human and socio-economic development; (ii) geographical and socio-economic determinants of vulnerability and adaptability of environmental health issues (exposure, sensitivity, and adaptive capacity); (iii) occurrence of CSDs from 1988 to 2017 and their direct impacts on human wellbeing (Total death and Affected people); (iv) an online survey on the perceptions of the effects of EWEs on human wellbeing in a sample of countries in the region; and (v) discussion of possible solutions. The socio-economic and development indices, and the International Disaster Database (EM-DAT) and Climate-Risk Index (CRI) disaster statistics suggest that the impacts of CSDs are primarily related to socio-economic determinants of human wellbeing and health inequalities. Also, >80% respondents to the survey say that the leading causes of climate-related human impacts are the lack of (i) public awareness; (ii) investment and (iii) preparedness. The paper concludes by adding some suggestions that show how countries in Latin America may better cope with the impacts of Climate-sensitive Disasters.

Purpose – The purpose of this article is to discuss the assessment and inclusion of stakeholders' perception, and citizen participation instances to implementing management options to deal with climate threats within the existing institutional framework in Uruguay. Design/methodology/approach – The approach being followed has different directional approaches and integrates them within a single assessment. First, a prescriptive climate change top-down path. Second, stakeholders' perception is assessed within a bottom-up risk-management model. Third, institutional agreements, arrangements, and consensus are reached. Considering the need for agreed and effective options, the approach is customized and turned flexible enough to accept inputs from scientists, managers, and stakeholders. Findings – The co-production of knowledge and the achievement of agreed and feasible options is achieved by means of a consultation process which results in adaptive co-management agreements and collective decisions. This process is seen as both an empowerment of local actors and a multi-stakeholder learning-by-doing experiment. This allows for both an increase in coping capacity to climate threats and facilitates long standing conflict resolution. Originality/value – Much literature discusses the importance of the role of social power in inclusive processes towards adaptation, and how difficult is ceding a genuine voice to stakeholders. The co-production of knowledge is a way to achieve the rapprochement of scientists with institutional and community actors. Thus, the participatory process gives stakeholders responsibility for identifying their specific needs and priorities and helps to establish community ownership.