O estado da arte dos estudos de rotíferos em ambientes naturais da América do Sul: planícies de inundação

Aoyagui, Anderson Setsuo Miyashiro; Bonecker, Cláudia Cósta

doi:10.4025/actascibiolsci.v26i4.1521

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…In Argentina, knowledge of the rotifer fauna remains relatively scanty (Aoyagui and Bonecker 2004), no doubt related to the scarcity of researchers working on that phylum. We therefore present here -some 25 years after the seminal contribution of José de -a revised and updated checklist of the Monogononta recorded in Argentina.…”

Section: Introductionmentioning

confidence: 99%

A revised and updated checklist of Monogononta rotifers from Argentina

Ferrando

Claps

2016

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Abstract:We provide here a checklist of species of Monogononta rotifers from lentic and lotic environments in Argentina, 25 years after the initial catalogue compiled by Susana B. José de Paggi. This new inventory now includes the reports on rotifers documented in 93 studies produced after 1990. The majority of the investigations were carried out in three of the 24 Argentine provinces. In addition, the presence of 13 species in samples from three water bodies within Buenos Aires province are now cited here for the first time in Argentina. In this updated checklist, a total of 351 species are catalogued, the majority being representatives of the Lecanidae, Brachionidae, and Lepadellidae.

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Section: Introductionmentioning

confidence: 99%

A revised and updated checklist of Monogononta rotifers from Argentina

Ferrando

Claps

2016

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“…2 But the effects of light on zooplankton are not restricted to conditions entailing direct exposure. 7 and references therein). [3][4][5] Most Pampean lakes are highly turbid environments, 6 in which light exposure is limited to the few uppermost centimetres, thus limiting the direct influence of light on planktonic animals.…”

Section: Introductionmentioning

confidence: 99%

“…Rotifers are the most representative group among zooplankton in floodplains lakes of Argentina (ref. 7 and references therein). The genera Brachionus and Keratella are particularly abundant.…”

Section: Introductionmentioning

confidence: 99%

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Rotifer dynamics in three shallow lakes from the Salado river watershed (Argentina): the potential modulating role of incident solar radiation

Diovisalvi

Rennella

Zagarese

2015

Photochem Photobiol Sci

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In turbid Pampean lakes, incident solar radiation is a major driver of plankton seasonal dynamics. Higher light availability in summer translates into higher primary production, and therefore more food for zooplankton grazers. However, experimental evidence suggests that food produced under the high irradiance conditions prevailing in summer are less suitable to sustain rotifer population growth than that produced under the lower irradiance conditions typical of winter. Here, we analysed time series datasets corresponding to three shallow lakes from the Salado river watershed. This analysis provided evidence for similar seasonal patterns of rotifer relative abundance over a large geographic area. In addition, we performed life table experiments to test the hypothesis that natural seston produced in winter could sustain higher population growth rates than seston produced in summer. We suggest that the natural seasonal changes in temperature and food generate successive time windows, which may be capitalized by the different grazer species, resulting in predictable phenology of grazer populations.

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Succession of microconsumers in waterlogged pampean soils (Buenos aires, Argentina) and its significance for nearby wetlands

2018

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In floodplains, the passive dispersal by drift occurs when water bodies become connected, and is a key feature offering pathways for the recolonization of periodically flooded habitats. Mesocosms with experimental flooding were used to document the succession of small invertebrates under differing hydrologic regimes with the intent of identifying which animals were capable of moving among habitats. The mesocosm experiments were performed in soils in sandy areas of the Salado-River basin including a mixed-use plot, a plot for breeding livestock, and a plot currently without any use located in different topographic positions (upper, middle, lower). Forty-seven taxa were found including ciliates, amoebae, rotifers, and microcrustaceans. The maximum total specific richness was recorded in middle soil and the minimum in upper soil because of a shorter colonization time. Higher mean densities occurred in middle and lower topographies, while the upper exhibited lower values. The ciliates and rotifers were the dominant. During the intermediate stage of flooding, the high density and biomass of the primary producers resulted in high concentration of dissolved oxygen (photosynthesis exceeded respiration). In contrast, in the final stage, low densities of microalgae led to low concentrations of dissolved oxygen and a high density of consumers (preponderance of respiration over photosynthesis). These flooded areas are significant as sources of microorganism inocula into the river. An abundance of microbiota arising from temporary wetlands and floodplains is fundamental for a successful recruitment of native-fish species.

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O estado da arte dos estudos de rotíferos em ambientes naturais da América do Sul: planícies de inundação

Cited by 4 publications

References 11 publications

A revised and updated checklist of Monogononta rotifers from Argentina

A revised and updated checklist of Monogononta rotifers from Argentina

Rotifer dynamics in three shallow lakes from the Salado river watershed (Argentina): the potential modulating role of incident solar radiation

Succession of microconsumers in waterlogged pampean soils (Buenos aires, Argentina) and its significance for nearby wetlands

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