Effects of Climate Variability on the Morphodynamics of Uruguayan Sandy Beaches

Ortega, Leonardo; Celentano, Eleonora; Finkl, Charles W.; Defeo, Omar

doi:10.2112/jcoastres-d-13-00003.1

Cited by 43 publications

(48 citation statements)

References 37 publications

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“…Ortega et al (2013) also reported a regime shift from a cold to a warm period after 1998 for the study area with a regional predominance of positive SSTA thereafter. This increasing trend in SST and predominance of positive SSTA could be associated with decadal cycles in climate that favour the intrusion of warm oceanic waters in the area which is supported by the occurrence in recent years of other species commonly associated to tropical or subtropical waters as the fishes Stellifer rastrifer (Segura et al 2009) and Aluterus scriptus (Izzo et al 2010).…”

Section: Discussionmentioning

confidence: 59%

“…This increasing trend in SST and predominance of positive SSTA could be associated with decadal cycles in climate that favour the intrusion of warm oceanic waters in the area which is supported by the occurrence in recent years of other species commonly associated to tropical or subtropical waters as the fishes Stellifer rastrifer (Segura et al 2009) and Aluterus scriptus (Izzo et al 2010). Moreover, Ortega et al (2013) reported for this area an increase in the frequency and speed of onshore winds that could enhance the advection of warm oceanic waters and its associated biota to the coast during austral summer. In this context of increasing frequency of positive SSTA, it would be reasonable to predict a future more permanent range extension of T. haplonema as sea water temperature increases, considering that the distributional range of cubozoan species is greatest in tropical waters with few species found beyond the tropics, north and south (Orellana and Collins 2011;Kingsford and Mooney 2014).…”

Section: Discussionmentioning

confidence: 85%

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Tamoya haplonema (Cnidaria: Cubozoa) from Uruguayan and adjacent waters: oceanographic context of new and historical findings

Leoni

González

Ortega³

et al. 2016

Mar Biodivers Rec

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New records of the cubozoan jellyfish Tamoya haplonema in Uruguayan waters are reported together with historical records for the region, and associated with the oceanographic conditions at the moment of the finding. Occurrences of the species are mainly associated with positive Sea Surface Temperature Anomalies especially during summer months when the intrusion of warm oceanic waters to the Uruguayan coastline is stronger. This was particularly strong during 2012-2013, when a dry period enhanced this scenario. This species is the only cubozoan present in Uruguay, with a sporadic occurrence and so far has no appreciated negative effects on public health. However, from observed increasing frequency of positive temperature anomalies it would be reasonable to predict a future southward shift in the latitudinal distribution of T. haplonema. In this context, occurrence of this toxic species along Uruguayan coastal waters must be considered with particular attention to the potential negative impact on tourism and on general public health.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 85%

Tamoya haplonema (Cnidaria: Cubozoa) from Uruguayan and adjacent waters: oceanographic context of new and historical findings

Leoni

González

Ortega³

et al. 2016

Mar Biodivers Rec

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“…An example is provided by a 29-yr study for the yellow clam M. mactroides, which is harvested by handpicking methods in the intertidal zone. There is a strong correlation between SSTA and wind speed anomalies (Ortega et al 2013), which reach their highest values toward the end of the study period ( Fig. 2A).…”

Section: Shellfisheriesmentioning

confidence: 86%

Impacts of Climate Variability on Latin American Small-scale Fisheries

Defeo¹,

Castrejón²,

Ortega³

et al. 2013

E&S

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ABSTRACT. Small-scale fisheries (SSFs) are social-ecological systems that play a critical role in terms of food security and poverty alleviation in Latin America. These fisheries are increasingly threatened by anthropogenic and climatic drivers acting at multiple scales. We review the effects of climate variability on Latin American SSFs, and discuss the combined effects of two additional human drivers: globalization of markets and governance. We show drastic long-term and large-scale effects of climate variability, e.g., sea surface temperature anomalies, wind intensity, sea level, and climatic indices, on SSFs. These variables, acting in concert with economic drivers, have exacerbated stock depletion rates in Latin American SSFs. The impact of these drivers varied according to the life cycle and latitudinal distribution of the target species, the characteristics of the oceanographic systems, and the inherent features of the social systems. Our review highlights the urgent need to improve management and governance systems to promote resilience as a way to cope with the increasing uncertainty about the impacts of climate and globalization of markets on Latin American SSFs.RESUMEN. Las pesquerías artesanales son sistemas sociales-ecológicos que desempeñan un papel clave en términos de seguridad alimentaria y la mitigación de la pobreza en América Latina. Estas pesquerías se encuentran cada vez más amenazadas por las presiones antropogénicas y climáticas que actúan a múltiples escalas temporales y espaciales. En este trabajo se ha evaluado la relación entre la variabilidad climática y los recursos pesqueros como una aproximación para comprender los posibles efectos a corto y largo plazo del cambio climático sobre las pesquerías artesanales en América Latina, teniendo en cuenta el efecto combinado de dos factores de estrés humanos adicionales: la globalización de los mercados y la gobernanza. En base al análisis cuantitativo de las extensas bases de datos utilizadas y empleando el enfoque de casos de estudio, este trabajo demuestra que se están produciendo efectos dramáticos a largo plazo y a gran escala de la variabilidad climática, que actuando de manera concertada con factores bioeconómicos, han exacerbado las tasas de depleción de los stocks en América Latina. En particular, hemos identificado dos principales factores del cambio global: (1) la variabilidad del clima a través de las anomalías de temperatura superficial del mar, de la intensidad del viento, del incremento del nivel del mar y del uso de índices climáticos, y (2) el aumento en los precios unitarios en las pesquerías artesanales que se encuentran altamente integradas en el mercado mundial de productos de la pesca. Los resultados también indican que el impacto de estos factores varía según el ciclo de vida y la distribución latitudinal de las especies objetivo, las características intrínsecas de los sistemas oceanográficos y las particularidades inherentes de los sistemas sociales. Nuestros resultados ponen de manifiesto la necesidad urgente de desar...

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“…The current global warming trend is predicted to alter significantly the water balance of the RdlP drainage area, leading to an increase in rainfall and river runoff over this region (HIRABAYASHI et al, 2008;KNAPP et al, 2008), and will significantly increase the frequency of large-scale floods (MILLY et al, 2002;HIRABAYASHI et al, 2008). In addition, an increase in the temperature of the sea surface; and of the speed of the winds from the south is other climatic factors affecting the survey area (ORTEGA et al, 2013). This will produce permanent changes in the community composition that will bring future variations in the structure and predatorprey relationships of the fish community (STENSETH et al, 2002), compromising the coastal stocks and the diverse fisheries of adjacent waters, with important socio-economic impacts (JAUREGUIZAR et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Fish assemblages in a small temperate estuary on the Argentinian coast: spatial variation, environmental influence and relevance as nursery area

et al. 2015

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The effects of different environmental variables on the fish community structure were evaluated in a small temperate estuary. The biological and environmental data were collected bimonthly between 2007 and 2009 along the main estuarine axis. Multivariate analyses were applied (CLUSTER, SIMPER, CCA) to determine the spatial structure of fish community and to estimate the environmental influence on it. A total of 48 species of "teleost" fishes were observed, with the families Characidae and Sciaenidae presenting the largest number of species, 90% of the catches being juveniles. The fish community was overwhelmingly dominated by one species (Micropogonias furnieri, 88.9%), and only four species contributed more than 1% of total catch (Odontesthes argentinensis5.4%, Brevoortia aurea 1.1%, Paralonchurus brasiliensis 1.1%, and Mugil platanus 1.0%). Estuarine and freshwater stragglers dominated in number of species, followed by freshwater migrants and marine migrants. Three areas with different fish assemblages, with distinctive species and functional guilds, were defined along the main axis. The occurrence and spatial spread of these areas were linked to spatial variation in salinity, which was consistently influenced by discharge from the Río de la Plata and local precipitation. The results highlight the importance of shallow environments as nursery areas and permit emphasis on their susceptibility to environmental changes.

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Effects of Climate Variability on the Morphodynamics of Uruguayan Sandy Beaches

Cited by 43 publications

References 37 publications

Tamoya haplonema (Cnidaria: Cubozoa) from Uruguayan and adjacent waters: oceanographic context of new and historical findings

Tamoya haplonema (Cnidaria: Cubozoa) from Uruguayan and adjacent waters: oceanographic context of new and historical findings

Impacts of Climate Variability on Latin American Small-scale Fisheries

Fish assemblages in a small temperate estuary on the Argentinian coast: spatial variation, environmental influence and relevance as nursery area

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