Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function

Bazzuri, María Elisa; Gabellone, Néstor Adrián; Solari, Lía Cristina

doi:10.1007/s00027-020-00720-4

Cited by 7 publications

(2 citation statements)

References 63 publications

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“…The Salado-River basin (Buenos Aires, Argentina) contains a large number of shallow lakes each with a different degree of connectivity to the main channel and the associated wetlands. These differences have a direct in uence on the degree of salinity, organic matter, and nutrient input into the river, thus determining the structure and composition of the plankton (Bazzuri 2016;Bazzuri et al 2010Bazzuri et al , 2018Bazzuri et al , 2020. Certain shallow lakes associated with the lower basin of the Salado River undergo uctuations in the water level, the conductivity and the the concentration of nutrients; parameters that vary according to the degree of connectivity of those environments to the river and to the hydrologic cycle (Gabellone et al 2001; Solari et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Effects of surface runoff from agricultural soils on the succession of microconsumer organisms in a lotic mesocosm

Zaplara,

Solari,

Gabellone

et al. 2024

Aquat Sci

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We analyzed the succession of soil organisms and nutrient dynamics under lotic conditions. We simulated typical runoff and erosion conditions in the laboratory using lotic mesocosms. We then analyzed the effects of soil waterlogging under dissimilar times of ooding on environmental variables, water nutrients, the concentration of chlorophyll "a", and the succession of consumer organisms in two systems (one with plankton, the other with arti cial substrates). The soil samples used were collected from a sector of the Salado-River middle basin with agricultural use and a middle topography. The environmental variables that varied the most greatly were the temperature and conductivity, both increasing throughout the ooding time; whereas the turbidity attained a maximum value at the beginning, but decreased thereafter. The soluble reactive phosphorus remained at a low concentration throughout the experiment, but the nitrates plus nitrites increased over time. The chlorophyll "a" in the water passed through maximum values at the beginning, but in the presence of arti cial substrates the concentration increased with progressive ooding. Of the taxa assessed, 24 were recorded in the plankton system with 18 and 14 detected in Zones I and II, respectively, of the arti cial-substrate systems. The groups of organisms registered in both systems were ciliates, amoebas, rotifers, and nematodes with a dominance mainly by the ciliates. In both systems (plankton and substrates), the speci c diversity was low and the succession of the communities limited. The exposure of the soil to surface-runoff erosion along with the effects of current velocity, turbulence, and turbidity determined the nutrient dynamics plus the emergence and succession of organisms.

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Section: Introductionmentioning

confidence: 99%

Effects of surface runoff from agricultural soils on the succession of microconsumer organisms in a lotic mesocosm

Zaplara,

Solari,

Gabellone

et al. 2024

Aquat Sci

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“…Therefore, agricultural practices have also involved the creation of artificial ponds, irrigation ditches and water reservoirs for livestock, which represent new open water habitats. Despite playing a key role in the regulation of ecosystems, few studies have explored the effect of conversion and wetland loss on freshwater organisms (Bazzuri, Gabellone & Solari, 2020; Corriale et al, 2021) and less is known about the potential of artificial wetlands to support native species in agro‐ecosystems of central Argentina (Brandolin, Ávalos & de Angelo, 2013).…”

Section: Introductionmentioning

confidence: 99%

Artificial aquatic habitats impoverish amphibian diversity in agricultural landscapes of central Argentina

Perrone

Deutsch

Bilenca

et al. 2022

Aquatic Conservation

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1. In central Argentina, agro-ecosystems constitute the dominant landscape, representing the replacement of extensive grassland areas by crops and pastures. Agriculture has caused the loss of extensive areas of Pampean inland wetlands through drainage and the construction of artificial aquatic habitats such as ditches and ponds. 2. This study evaluated the availability and amphibian breeding use of 194 natural and artificial open water habitats and identified those attributes that affect amphibian diversity (richness, abundance and species occurrence). 3. Interviews with farmers revealed that all artificial ditches, drainage channels and ponds were constructed directly or indirectly to support agricultural activities, and 61.5% of them were created at the expense of natural wetlands. The results from generalized linear mixed models) indicated a significant decrease (P < 0.05) in amphibian richness (14.2-35.7%) and abundance (35.3-86.6%) in artificial habitats compared with natural habitats. 4. Overall, vegetation cover, average depth and edge slope emerged as the most important attributes affecting amphibian diversity in artificial open water habitats.Vegetation cover had a significant (P < 0.05) positive influence on species richness and abundance, whereas average depth and edge slope had the opposite effect. 5. Given the substantial modification of inland wetlands in central Argentina, natural aquatic habitats should be considered top priorities for conservation, and law enforcement is urgently needed to control the drainage and levelling of lagoons, ponds and low-lying areas. The appropriate design and planning of constructed wetlands, including shallow depth and slightly sloping edges, could greatly improve the ability of artificial wetlands to favour native amphibians in these altered landscapes.6. Artificial wetlands could offer complementary habitats to natural habitats for amphibians and aquatic wildlife if actions leading to sustainable management and territorial planning are applied.

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Predicting the density of zooplankton subsidy to a stream with multiple impoundments using water quality parameters

et al. 2023

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Zooplankton-population dynamics in the Salado-River basin (Buenos Aires, Argentina) in relation to hydraulic works and resulting wetland function

Cited by 7 publications

References 63 publications

Effects of surface runoff from agricultural soils on the succession of microconsumer organisms in a lotic mesocosm

Effects of surface runoff from agricultural soils on the succession of microconsumer organisms in a lotic mesocosm

Artificial aquatic habitats impoverish amphibian diversity in agricultural landscapes of central Argentina

Predicting the density of zooplankton subsidy to a stream with multiple impoundments using water quality parameters

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