The effects of long-term climate variability on the trophodynamics of an estuarine ecosystem in southern South America

Vögler, Rodolfo; Arreguı́n-Sánchez, Francisco; Lercari, Diego; Luna, Pablo Del Monte; Calliari, Danilo

doi:10.1016/j.ecolmodel.2015.09.006

Cited by 7 publications

(3 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbon sources from terrestrial organic matter, including invertebrates and autumn leaf fall, could have greater importance for aquatic ecosystems subsidizing aquatic organisms during high discharge periods (Junk et al 1989). Furthermore, previous articles highlighted the important influence of ENSO events and river runoff patterns on fish assemblage (Garcia et al 2001), on shrimp catches in the Patos Lagoon in southern Brazil (Moller et al 2009), and also in ecosystem properties of the RdlP (Vögler et al 2015). Our results (together with those of Schuerch et al 2016) highlighted the effects of interannual climate variability linked to ENSO events, on the influence of the terrestrial/marine organic matter inputs drained into the RdlP estuary.…”

Section: Contribution Of Enso Events To Organic Matter In Core Sedimentssupporting

confidence: 77%

Linking patterns of freshwater discharge and sources of organic matter within the Río de la Plata estuary and adjacent marshes

Bergamino

Schuerch

Tudurí

et al. 2017

Mar. Freshwater Res.

View full text Add to dashboard Cite

We investigated carbon isotopic ratios (δ13C) v. carbon to nitrogen (C : N) ratios for surface sediments throughout a large estuarine system (Río de la Plata, RdlP), combined with sediment cores from adjacent marshes to infer main carbon sources. We also evaluated the influence of the El Niño–Southern Oscillation (ENSO) and associated high freshwater-discharge events on the organic-matter transport within the estuary. The isotopic pattern in surface sediments of the RdlP showed the upper reaches to be influenced by riverine particulate matter (δ13C range: –24 to –26‰). Similarly, in the sediment cores from marshes of the upper reaches, δ13C values decreased from –24‰ in ancient sediments to –28‰ in recent sediments, reflecting an increased contribution of organic matter from land, including C3 plants and freshwater phytoplankton, during the past 50 years. However, the lower reaches represent a depositional environment of marine algae (δ13C range: –21 to –23‰), with no influence of detritus from adjacent marshes, indicating minor erosion of the marshes in the lower reaches operating as carbon-sink habitats. Our isotopic analysis showed that the transport and deposition of terrigenous organic matter within the RdlP and adjacent marsh habitat appear to be both temporally and spatially linked to hydrology patterns.

show abstract

Section: Contribution Of Enso Events To Organic Matter In Core Sedimentssupporting

confidence: 77%

Linking patterns of freshwater discharge and sources of organic matter within the Río de la Plata estuary and adjacent marshes

Bergamino

Schuerch

Tudurí

et al. 2017

Mar. Freshwater Res.

View full text Add to dashboard Cite

show abstract

“…all iterations assumed the same top-down or bottom-up control of the predator on all of its prey 84 . The PP_anomaly function could represent an environmental driver that can affect primary productivity and is therefore often related to climate variability indices 15 , 47 , 88 , 89 . The fitting procedure was performed with and without temperature and output compared with previous versions of the model fitting 40 , 84 .…”

Section: Methodsmentioning

confidence: 99%

Impact of ocean warming on sustainable fisheries management informs the Ecosystem Approach to Fisheries

Serpetti

Baudron

Burrows

et al. 2017

Sci Rep

115

View full text Add to dashboard Cite

An integrated ecosystem model including fishing and the impact of rising temperatures, relative to species’ thermal ranges, was used to assess the cumulative effect of future climate change and sustainable levels of fishing pressure on selected target species. Historically, important stocks of cod and whiting showed declining trends caused by high fisheries exploitation and strong top-down control by their main predators (grey seals and saithe). In a no-change climate scenario these stocks recovered under sustainable management scenarios due to the cumulative effect of reduced fishing and predation mortalities cascading through the food-web. However, rising temperature jeopardised boreal stenothermal species: causing severe declines in grey seals, cod, herring and haddock, while eurythermal species were not affected. The positive effect of a higher optimum temperature for whiting, in parallel with declines of its predators such as seals and cod, resulted in a strong increase for this stock under rising temperature scenarios, indicating a possible change in the contribution of stocks to the overall catch by the end of the century. These results highlight the importance of including environmental change in the ecosystem approach to achieve sustainable fisheries management.

show abstract

“…Ecosystem degradation in the Río de la Plata ecosystem, expressed as increased system entropy and diminished system biomass, is strongly forced by extreme and EP El Niño events, and weakly forced by strong La Niña events. Meridional sea surface temperature anomalies were used as indicators of ENSO-induced forcing by Vögler et al (2015).…”

Section: El Niño Neutralmentioning

confidence: 99%

El Niño Southern Oscillation (ENSO) effects on fisheries and aquaculture

Bertrand

Lengaigne

Takahashi³

et al. 2020

View full text Add to dashboard Cite

The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations (FAO) concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dashed lines on maps represent approximate border lines for which there may not yet be full agreement. The mention of specific companies or products of manufacturers, whether or not these have been patented, does not imply that these have been endorsed or recommended by FAO in preference to others of a similar nature that are not mentionedThe views expressed in this information product are those of the author(s) and do not necessarily reflect the views or policies of FAO.

show abstract

The effects of long-term climate variability on the trophodynamics of an estuarine ecosystem in southern South America

Cited by 7 publications

References 39 publications

Linking patterns of freshwater discharge and sources of organic matter within the Río de la Plata estuary and adjacent marshes

Linking patterns of freshwater discharge and sources of organic matter within the Río de la Plata estuary and adjacent marshes

Impact of ocean warming on sustainable fisheries management informs the Ecosystem Approach to Fisheries

El Niño Southern Oscillation (ENSO) effects on fisheries and aquaculture

Contact Info

Product

Resources

About