The hydrological and environmental evolution of shallow Lake Melincué, central Argentinean Pampas, during the last millennium

Guerra, Lucía; Piovano, Eduardo L.; Córdoba, Francisco; Sylvestre, Florence; Damatto, Sandra R.

doi:10.1016/j.jhydrol.2015.01.002

Cited by 30 publications

(32 citation statements)

References 52 publications

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“…The historical and hydro‐geomorphological approach (Spaliviero, ) appears as a simple but efficient framework for a better long‐term territorial planning (e.g., Forte, Pennetta, & Strobl, ; Nirupama & Simonovic, ; Spaliviero, De Dapper, & Maló, ). In this context, fluvial geomorphology provides a framework for flood‐risk assessment, especially through (a) delineation of flood prone areas in broad alluvial valleys by mapping flood‐related landforms and deposits, soil and plant associations, and flood observations (Benito & Hudson, ; Bodoque et al, ) and (b) paleohydrology reconstructions of the evolution of rivers (Isla et al, ) and lakes (Guerra, Piovano, Córdoba, Sylvestre, & Damatto, ).…”

Section: Introductionmentioning

confidence: 99%

A paleo‐hydro‐geomorphological perspective on urban flood risk assessment

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Brox‐Escudero

González

et al. 2019

Hydrological Processes

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Comprehensive flood risk assessment requires enhanced understanding of the coevolution of the river and its floodplain occupation. Paleoflood analysis to determine flood prone areas in combination with numerical simulations to estimate flood hazard and a historical analysis of urban development to consider the evolution of exposure to floods is a possible way forward. The well-documented 2006 extreme flood in the Biobío River system and the impacted metropolitan area of Concepción, Chile (~1 million inhabitants) was used as a complex scenario to test the reliability of the proposed method. Results showed that flood prone areas determined with hydro-geomorphological methods are consistent with those computed with numerical models based on detailed digital elevation models. The flood generation via superficial flow pathways resulting in inundated areas could explain that rivers tend to reactivate paleochannels in extreme conditions. Urban development progressively increased the city's exposure to floods from 0 ha in 1,751 to 1,363 ha in 2006 evidencing a lack of appropriate flood risk management. The 100-year peak discharge resulted in a high flood risk for about 5% of the total urbanized area of Concepción, and higher discharges are likely to reactivate a paleochannel that crosses the current city centre. We conclude that the proposed paleo hydro-geomorphology, hydraulic, and urban planning multimethod approach is a necessary tool to enhance understanding of flood risk in complex scenarios to improve flood risk management. K E Y W O R D SBiobío River, flood risk management, hydro-geomorphological approach, numerical modelling, paleoflood

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Section: Introductionmentioning

confidence: 99%

A paleo‐hydro‐geomorphological perspective on urban flood risk assessment

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Brox‐Escudero

González

et al. 2019

Hydrological Processes

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“…This large wetland is affected by multiple factors such as long-term cycles of hydrological dynamics (Romano et al 2005;Guerra et al 2015), climate change and anthropogenic impact (Marconi and Sureda 2008;Romano et al 2014). Some of these factors are common to other large wetlands of the Chaco-Pampas region (Piovano et al 2009), whereas others are particular for this site (e.g., water pumping; Romano et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Non-passerine birds from Laguna Melincué Ramsar Site, Santa Fe province, Argentina

Romano¹,

Barberis²,

Luppi³

et al. 2015

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We present a waterbird inventory of the Laguna Melincué Ramsar Site in southern Santa Fe province, Argentina. We record 109 species from 28 families of non-passerine birds, including the 14 Nearctic species, four southern austral migrant species, three northern austral migrants, 17 partial migrants, and two altitudinal migrants. The eight most abundant species belong to different families and trophic groups. Thirty-six species were observed nesting or rearing chicks. This baseline knowledge of non-passerine birds will be useful to assist future conservation studies in this highly threatened area.

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“…The age-depth model was developed applying the constant flux/constant sedimentation (CFCS) model to the radionuclide activities of 137 Cs, 210 Pb, and 226 Ra (detected at the Radiochronology Laboratory of the Laval University, Canada). Three known chronomarkers were used to constrain the 210 Pb model: the 137 Cs maximum peak at 6-7 cm as a time marker of A.D. 1964/1965; the first occurrence of Eucalyptus pollen (exotic tree)in the sedimentary record as a result of an extensive forestation since 1880 in Argentina; and a lithology change corresponding to an extreme regional dry pulse registered across the Pampean Plain at the end of the Little Ice Age (estimated to be A.D. 1775 ± 10 years) and recognized in other lakes, for instance, Mar Chiquita, Melincué [26,27]. For further details on the age-depth model, see [28].…”

Section: Core Chronology and Paleolimnological Analysesmentioning

confidence: 99%

Changes in Planktivory and Herbivory Regimes in a Shallow South American Lake (Lake Blanca Chica, Argentina) Over the Last 250 Years

Carrozzo

Musazzi

Lami

et al. 2020

Water

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Shallow lakes are vulnerable ecosystems impacted by human activities and climate change. The Cladocera occupy a central role in food webs and are an excellent paleoecological indicator of food web structure and trophic status. We conducted a paleolimnological study in Lake Blanca Chica (Argentina) to detect changes on the planktivory and herbivory regimes over the last 250 years. Generalized additive models were fitted to the time series of fish predation indicators (ephippial abundance and size, mucrone size, fish scales, and the planktivory index) and pheophorbide a concentration. The cladoceran assemblage changed from littoral-benthic to pelagic species dominance and zooplankton switched from large-bodied (Daphnia) to small-bodied grazers (Bosmina) ca. 1900 due to increased predation. The shift in planktivory regime (ca. 1920–1930), indicated by fish scales and the planktivory index, as well as herbivory (ca. 1920–1950), was triggered by eutrophication. Changes in planktivory affected the size structure of Bosmina, reducing its body size. This study describes the baseline for the lake as well as the profound changes in the composition and size structure of the zooplankton community due to increased predation and the shift in the planktivory regime. These findings will provide a reference status for future management strategies of this ecosystem.

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The hydrological and environmental evolution of shallow Lake Melincué, central Argentinean Pampas, during the last millennium

Cited by 30 publications

References 52 publications

A paleo‐hydro‐geomorphological perspective on urban flood risk assessment

A paleo‐hydro‐geomorphological perspective on urban flood risk assessment

Non-passerine birds from Laguna Melincué Ramsar Site, Santa Fe province, Argentina

Changes in Planktivory and Herbivory Regimes in a Shallow South American Lake (Lake Blanca Chica, Argentina) Over the Last 250 Years

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