The hydrochemistry of the inland waters of Argentina: a review

Drago, Edmundo C.; Quirós, Rolando

doi:10.1007/bf01999115

Cited by 45 publications

(36 citation statements)

References 12 publications

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“…Suspended sediment values in the Upper Salado del Norte River were 0.07 g.L x1 during low water periods (Table 3). The data show that the concentration values in this area are high (up to 20 g.L x1 ) during high water phases (Drago and Quiro´s, 1996;Drago and Paira, 1997). This concentration is a barrier to the settlement of the golden mussel in this river sector.…”

Section: Sedimentological Barriermentioning

confidence: 77%

“…The upper segment carries high sediment loads (Drago and Paira, 1997). There are also changes in salinity; the headwater streams usually yield low salinities (< 0.5 g.L x1 ), increasing to 1.3-96.0 g.L x1 in the middle and lower segments of the Salado del Norte River (Drago and Quiro´s, 1996;Drago and Paira, 1997). Along its lower segment the river changes its intermittent flow regime and loses its allochtonous character due to the confluence of the Calchaquı´River.…”

Section: Salado Del Norte Rivermentioning

confidence: 99%

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Environmental factors restrict the invasion process ofLimnoperna fortunei(Mytilidae) in the Neotropical region: A case study from the Andean tributaries

Darrigran

Damborenéa

Drago

et al. 2011

Ann. Limnol. - Int. J. Lim.

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-The golden mussel Limnoperna fortunei was introduced into Argentina in 1991 and has since been spreading through the Plata and Guaı´ba basins at a rate of 240 km.year x1 . To assess their ability to invade the Andean tributaries of the Plata Basin (Pilcomayo, Bermejo and Salado del Norte rivers), their current range was assessed and related to the abiotic parameters of sites where they were present and absent. These data were then compared with their known tolerances to identify possible barriers to invasion. Outputs suggested that three environmental parameters are barriers to invasion: salinity and river flow intermittence in different sectors of the rivers Pilcomayo and Salado del Norte, and concentration of suspended sediments in the Bermejo River and in the upper reaches of the Salado del Norte and Pilcomayo rivers. The importance of these findings is discussed in relation to using environmental data to infer the invasion possibilities and the utility of environmental data to better understand invasion patterns and processes.

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Section: Sedimentological Barriermentioning

confidence: 77%

Section: Salado Del Norte Rivermentioning

confidence: 99%

Environmental factors restrict the invasion process ofLimnoperna fortunei(Mytilidae) in the Neotropical region: A case study from the Andean tributaries

Darrigran

Damborenéa

Drago

et al. 2011

Ann. Limnol. - Int. J. Lim.

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“…Studies on the limnological characteristics and some information on zooplankton, of the saline waters of different regions of Argentina are available (OLIVIER, 1955;RINGUELET et al, 1967;DRAGO and QUIRÓS, 1996;QUIRÓS et al, 2002;VIGNATTI, 2001, 2002;NESCHUK et al, 2002). Actually, the model of two alternative stable states in shallow lakes (SCHEFFER, 1998;SCHEFFER et al, 1993) is the adequate background to study the zooplanktonic community structure and dynamics.…”

Section: Introductionmentioning

confidence: 97%

“…A great number of generally small saline lakes, whose ionic composition is dominated by sodium and carbonates (DRAGO and QUIRÓS, 1996), are located in endorheic basins of the province of La Pampa. Owing to the great losses of water produced by high evaporation rates and to rain seasonality, the most remarkable fluctuations in the water levels of lakes, and consequently in their salinity values, occur towards the end of the spring and during the summer (ROBERTO et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Zooplankton Seasonal Abundance of South AmericanSaline Shallow Lakes

Echaniz¹,

Vignatti²,

Paggi³

et al. 2006

International Review of Hydrobiology

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The central provinces of Argentina are characterized by the presence of a high number of shallow lakes, located in endorheic basins, many of which have elevated salinities as well as eutrophic or hypereutrophic condition. The zooplankton of four saline shallow lakes of the province of La Pampa was studied on a monthly basis during a 2-year period to determine its temporal and spatial variation.The surface of these shallow lakes (< 2.5 m depth) varied between 56.8 and 215.9 ha, and some have from 8.4 to 20.8 g · l -1 . The more saline lakes have "clear" water and the less saline lakes "turbid" water. Fishes, Jenynsia multidentata, were present in only two lakes during the last two months of the studied period.The zooplankton was composed of 17 taxa of Rotifera, 5 taxa of Cladocera and 4 taxa of Copepoda. The low diversity and the faunistic composition are characteristic of saline environments. Although the studied lakes share 38% of the species, the faunistic similarity was higher between the two least saline lakes. The lowest diversity was found in the two most saline lakes.All four shallow lakes were characterized by their very high zooplankton density, especially in the least saline lakes (< 80000 ind · l -1 ). The abundance is significantly correlated with the water transparency but not with salinity.The zooplankton temporal variation was characterized by the alternation of macro-and microzooplankton, probably regulated by competition and intrazooplanktonic predation. In each lake, the spatial abundance distribution of the macro-and microzooplankton was homogeneous. It was related to the shallow depht of the lakes and their polymictic condition.The SCHEFFER model on alternative states in shallow lakes acknowledges that it cannot be applied to saline lakes because Daphnia, the main responsible for the clear water state, is not tolerant to high salinity. Our study shows that the most saline lakes, where the halophylic Daphnia menucoensis is abundant, have also the most clear waters. Another difference that we found with regards to the mentioned model is that, in turbid lakes, it could not have had a top-down control on macrozooplankton exerted by fishes because in these lakes fishes were practically absent.

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“…In this scenario, high-altitude lakes tend to become salt lakes since low rate of rainfalls and a high rate of evaporation take place in these environments, and determine saline accumulation (Hammer, 1986;Drago and Quiro´s, 1996). The formation of salt lakes is also favoured in endorheic drainage basins that are located in semi-arid and sub-humid climates where evaporation exceeds precipitation (Williams et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

Controlling factors in planktonic communities over a salinity gradient in high-altitude lakes

Frau

Battauz

Mayora

et al. 2015

Ann. Limnol. - Int. J. Lim.

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-This study aimed to determine the factors affecting plankton structure along a salinity gradient during the summer in high-altitude endorheic lakes in Catamarca Province (Argentina). During the summer 2013, eight lakes located between 3000 and 4300 meters above sea level were sampled in a 6-day period being analysed plankton, limnological variables and flamingo abundance. Principal Component Analysis explained 80% of the system variability, permitting lakes to be ordered by salinity: subhaline (SH), hypohaline (HH) and mesohaline (MH). A total of 101 phytoplankton taxa were registered, having Bacillariophyceae the highest richness (43 species registered). HH lakes were dominated by Bacillariophyceae (between 65 and 100%), while Chlorophyceae and Euglenophyceae were more abundant in SH and MH lakes. Zooplankton was poorly represented in richness (only 21 species were registered). MH lakes were dominated by Copepoda ( > 85% of total abundance) and HH lakes by Rotifera ( > 51% of total abundance). It was not found a clear pattern in SH lakes. The redundancy analysis explained 70.7% of phytoplankton variability and 75.7% of zooplankton variability. Bacillariophyceae presence was associated with availability of dissolved silica (Si), while Euglenophyceae and Chlorophyceae were associated with a higher nitrogen:phosphorus ratio. Cladocera and Copepoda abundance were linked to Euglenophyceae abundance and the area of lakes while Rotifera displayed a positive relation with the concentration of dissolved organic matter. We conclude that both phytoplankton and zooplankton abundance are mainly controlled by Bottom-Up forces including dissolved Si for Bacillariophyceae, and availability of Euglenophyceae for zooplankton while salinity and altitude have an effect on plankton richness distribution.

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The hydrochemistry of the inland waters of Argentina: a review

Cited by 45 publications

References 12 publications

Environmental factors restrict the invasion process ofLimnoperna fortunei(Mytilidae) in the Neotropical region: A case study from the Andean tributaries

Environmental factors restrict the invasion process ofLimnoperna fortunei(Mytilidae) in the Neotropical region: A case study from the Andean tributaries

Zooplankton Seasonal Abundance of South AmericanSaline Shallow Lakes

Controlling factors in planktonic communities over a salinity gradient in high-altitude lakes

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