Río de la Plata: A Neotropical Estuarine System

García‐Alonso, Javier; Lercari, Diego; Defeo, Omar

doi:10.1016/b978-0-12-814003-1.00003-4

Cited by 16 publications

(6 citation statements)

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“…The increased precipitation leads to increased river runoff, which impacts the stratification (Piola et al 2000) and circulation (Matano et al 2014), and modulates the nutrient supply to the coastal ocean (Ciotti et al 1995). Such changes in atmospheric forcing and river discharge may also have a substantial impact on recruitment of commercially exploited species (e.g., Acha et al 2012;García-Alonso et al 2019).…”

Section: Atmospheric Circulationmentioning

confidence: 99%

Climate change impacts on the atmospheric circulation, ocean, and fisheries in the southwest South Atlantic Ocean: a review

et al. 2020

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We present an interdisciplinary review of the observed and projected variations in atmospheric and oceanic circulation within the southwestern South Atlantic focused on basin-scale processes driven by climate change, and their potential impact on the regional fisheries. The observed patterns of atmospheric circulation anomalies are consistent with anthropogenic climate change. There is strong scientific evidence suggesting that the Brazil Current is intensifying and shifting southwards during the past decades in response to changes in near-surface wind patterns, leading to intense ocean warming along the path of the Brazil Current, the South Brazil Bight, and in the Río de la Plata. These changes are presumably responsible for the poleward shift of commercially important pelagic species in the region and the long-term shift from cold-water to warm-water species in industrial fisheries of Uruguay. Scientific and traditional knowledge shows that climate change is also affecting small-scale fisheries. Long-term records suggest that mass mortalities decimated harvested clam populations along coastal ecosystems of the region, leading to prolonged shellfishery closures. More frequent and intense harmful algal blooms together with unfavorable environmental conditions driven by climate change stressors affect coastal shellfisheries, impact economic revenues, and damage the livelihood of local communities. We identify future modelling needs to reduce uncertainty in the expected effects of climate change on marine fisheries. However, the paucity of fisheries data prevents a more effective assessment of the impact of climate change on fisheries and hampers the ability of governments and communities to adapt to these changes.

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Section: Atmospheric Circulationmentioning

confidence: 99%

Climate change impacts on the atmospheric circulation, ocean, and fisheries in the southwest South Atlantic Ocean: a review

et al. 2020

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“…The Uruguayan coastline and the associated Rio de la Plata estuary have been classified as medium-high impacted areas (Halpern et al, 2007) threatened by costal urbanization, intensive agricultural activities, maritime transport and dredging (García-Alonso et al, 2019). Previous research has found high concentrations of trace elements in water and sediments of the region, with historical increases associated with industrialization and urbanization processes of two important capitals, Montevideo (Uruguay) and Buenos Aires (Argentina) (Carsen et al, 2003;García-Rodríguez et al, 2010;Gil et al, 1999;Marcovecchio and Ferrer, 2005;Viana et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Historic variation of trace elements in pinnipeds with spatially segregated trophic habits reveals differences in exposure to pollution

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García‐Alonso

et al. 2021

Science of The Total Environment

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Marine mammals and the ecological functions they provide to coastal and pelagic ecosystems are increasingly threatened by the intensification of anthropogenic impacts. The Uruguayan coastline throughout the 20th century, like other coastal environments worldwide, has been the sink of a variety of trace metals derived from the rapid urbanization and industrialization of related land areas. This coastline is inhabited by two species of pinnipeds trophically and spatially segregated. Otaria byronia feeds in coastal environments while Arctocephalus australis preys mainly offshore. The present study aimed to analyze historic changes in concentrations of trace elements in teeth of both species from 1941 to the present day. We analyzed the dentin of 94 canine teeth using stable isotope analysis (δ 13 C) and ICP-MS to determine their feeding areas and the concentration of 10 trace elements (Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) respectively. The concentration of Cr was significantly higher during '70-'80s, in both species coinciding with tannery industry development. Both species of pinnipeds have been differentially exposed to trace elements depending on their feeding area. A pelagic diet, possibly based on squid, increased the concentration of Cd in A. australis, while O. byronia has been more exposed to

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“…On longer timescales, ecological pressures from fishing activities are affecting fish populations and ecosystems . For example, in Río de la Plata, fishing effort for artisanal and industrial fleets has remained constant or even declined slightly, but catches for the two most important species have reached their lowest values in the past 35 years (Gianelli and Defeo, 2017;García-Alonso and others, 2019).…”

Section: Factors Associated With the Changes: Drivers Pressures Impac...mentioning

confidence: 99%

The Second World Ocean Assessment

2021

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The past year has presented unprecedented challenges. The coronavirus disease (COVID-19) pandemic has disrupted lives and livelihoods and exposed our societies' fragility. Sadly, the pandemic is not the only crisis that humanity faces. Climate change and biodiversity loss continue unabated, threatening sustainable development and our viability as a species. These challenges are particularly evident when we look at the state of our planet's life support system, the ocean.In 2015, the first World Ocean Assessment warned that many areas of the ocean had been seriously degraded, the greatest threat to the ocean being the failure to deal with the many pressures caused by human activities. The message in the second World Ocean Assessment is that the situation has not improved, with the many benefits that the ocean provides at risk. The Assessment advises that, to ensure sustainability, we must work together to improve integrated ocean management, including through joint research, capacity development and the sharing of data, information and technology.The ocean plays a crucial role in the achievement of the Sustainable Development Goals and the livelihoods of billions of people. We urgently need to change how we interact with it. The forthcoming United Nations Decade of Ocean Science for Sustainable Development and the United Nations Decade on Ecosystem Restoration provide opportunities for us to understand more and to reverse the damage that has already been done. The information in the second Assessment can assist in this process, as well as inform relevant intergovernmental conferences scheduled for 2021.I urge leaders and all stakeholders to heed the warnings in the Assessment as we work to conserve and sustainably manage our planet's marine environment. Let us foster not only a green but also a blue recovery from the COVID-19 pandemic.

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Río de la Plata: A Neotropical Estuarine System

Cited by 16 publications

References 50 publications

Climate change impacts on the atmospheric circulation, ocean, and fisheries in the southwest South Atlantic Ocean: a review

Climate change impacts on the atmospheric circulation, ocean, and fisheries in the southwest South Atlantic Ocean: a review

Historic variation of trace elements in pinnipeds with spatially segregated trophic habits reveals differences in exposure to pollution

The Second World Ocean Assessment

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