El zooplancton de los grandes ríos sudamericanos con planicie de inundación

Paggi, Susana B. José de; Paggi, Juan C.

doi:10.14409/fabicib.v18i0.4853

Cited by 10 publications

(6 citation statements)

References 84 publications

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“…As also observed in other studies of tropical and temperate rivers (Frutos, Neiff, & Neiff, 2006;Jose de Paggi & Paggi, 2014;Lair, 2006;Matsumura-Tundisi, Tundisi, Souza-Soares, & Tundisi, 2015), the zooplankton community of the Madeira River was dominated by rotifers and copepods (mainly larval and juvenile forms), especially pre-dam. In terms of richness, rotifers had greatest taxon richness both pre-and post-dam.…”

Section: Discussionsupporting

confidence: 84%

“…Even at their highest densities, the number of copepod taxa was the lowest of all zooplanktonic groups. This occurs commonly in rivers because larval and juvenile copepod forms predominate, while the adults, necessary for species‐level taxonomic determination, are scarce (Jose de Paggi & Paggi, ).…”

Section: Discussionmentioning

confidence: 99%

“…Differences in zooplankton community structure and in its main compositional groups pre-and post-dam were mainly evident in the ebb (entire zooplankton community, testate amoebae and rotifers) and low-water hydrological periods (cladocerans). Other floodplain river studies have also detected the most pronounced differences in zooplankton community structure at ebb or low water (Frutos et al, 2006;Jose de Paggi & Paggi, 2014;Thomaz et al, 2007;Zhao et al, 2017). In the MRT analysis, the zooplankton communities in low-water periods pre-and post-dam were different enough to be classified into two groups.…”

Section: Interaction Of Damming With Hydrological Periodmentioning

confidence: 93%

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Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

et al. 2019

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Flow modification of lotic ecosystems is one of the main threats to global freshwater biodiversity. Commonly, and in the river studied here, modification results from hydroelectric dam installation. We evaluated the impacts of damming on zooplankton communities in the Amazonian floodplain of the Madeira River (Porto Velho, Rondônia, Brazil) following construction in 2012 of the run‐of‐river dam of Jirau Hydroelectric Power Plant. Using data sampled between 2009 and 2015, we tested for discontinuities in zooplankton community composition attributable to damming and the naturally occurring flood pulse. The flood pulse remained the main predictor explaining variation in zooplankton community structure even with the installation of the dam on the Madeira River. Despite this, discontinuities for the entire zooplankton community and for the main compositional groups (testate amoebae, rotifers, cladocerans, and copepods) were detected in relation to the dam (pre‐/post‐dam periods), mainly in ebb and low water, and with weaker evidence of dam effects during flood and highwater hydrological periods. A multivariate regression tree explained 9.6% of the variation in zooplankton communities and identified four groups: (1) flood and high‐water periods; (2) low water post‐dam; (3) low water pre‐dam; and (4) ebb hydrological periods. The deviance in each multivariate regression tree node was attributable to variation in eight rotifer, three testate amoeba, and three copepod taxa. Our study demonstrates that the flood pulse, dam construction, and interaction between both of these factors affect zooplankton community structure in the Madeira River. While for many zooplankton community variables, effects occurred mainly during ebb and low‐water periods, some effects were also observed during high water and flood periods. We thus recommend the establishment of a permanent environmental monitoring programme during all hydrological periods in tropical floodplain rivers and the addition of sampling sites downstream from dams. Many rivers in the world are increasingly disrupted by multiple dams, yet little is known of their effects, especially for run‐of‐river dams. Our study identified short‐term impacts of only one run‐of‐river dam on zooplankton communities. More research is needed on the effects of multiple run‐of‐river dams on zooplankton and other biota, especially in tropical floodplain rivers, so that negative effects can be understood and ameliorated.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Interaction Of Damming With Hydrological Periodmentioning

confidence: 93%

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Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

et al. 2019

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“…The suspension of matter can have a negative effect on zooplankton, causing mechanical disturbances (obstruction and/or clogging) within the filtering apparatus, reducing the feeding and growth rates of these organisms and compromising important biological interactions (Claps et al, 2011;José de Paggi and Paggi, 2014). In addition, cyanobacterial filaments or mucilages can also interfere with the filtration apparatus of large cladocerans and calanoid copepods, which leads to the decline and replacement of these populations by small rotifers (Sendacz et al, 2006;Eskinazi-Sant'Anna et al, 2013), as observed in the FUR and COR reservoirs.…”

Section: Discussionmentioning

confidence: 99%

Zooplankton communities and their relationship with water quality in eight reservoirs from the midwestern and southeastern regions of Brazil

Picapedra

Fernandes²,

Baumgartner

et al. 2021

Braz. J. Biol.

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Zooplankton are widely recognised as being regulated primarily by predators and food availability. In reservoirs, the quantity and quality of food resources are generally affected by the characteristics of the water, which in turn are controlled by the flow pulse generated by operation of the dams. In this study, we investigated the relationship between zooplankton, water quality and food availability (phytoplankton) in eight hydroelectric reservoirs located in Brazil. Samples were collected during the rainy and dry periods between 2008 and 2009. In general, the reservoirs exhibited mesotrophic conditions and Cyanobacteria were the predominant phytoplankton. The results showed that the rotifers Kellicottia bostoniensis, Hexarthra mira, Keratella spp., and Polyarthra vulgaris were present, indicating nutrient-rich environments. In addition, the copepod Thermocyclops decipiens occurred in eutrophic environments. In contrast, the cladoceran Daphnia gessneri and copepod Notodiaptomus henseni were considered indicators of more desirable water quality, owing to their relationship with waters with lower levels of nutrients and suspended solids. The results support the use of these organisms as a useful tool for understanding changes in water quality and in the ecosystem processes involved.

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“…Aoyagui & Bonecker (2004) mencionan que Brachionus, Lecane, Keratella, Polyarthra y Filinia son géneros abundantes y son parte de una asociación típica de géneros planctónicos dominantes, lo que no aplica para el género Hexarthra, que es abundante pero en solitario. Según Acosta (2005), estos géneros presentan una distribución cosmopolita o tropicospolita para la mayoría de las especies de Lecane que, además, tienen fuertes endemismos en el Neotrópico (José De Paggi & Paggi, 2014). Dicha distribución puede explicar la presencia de estos géneros en el humedal El Silencio, además, la abundancia del género Brachionus se relacionaría con la presencia de grandes cantidades de materia orgánica (Gómez, et al, 2013) y con el hecho de que la familia Brachionidae es muy tolerante a ciertas condiciones contaminantes, así como a diversas condiciones ecológicas (Sládeček, 1983).…”

Section: Discussionunclassified

Rotíferos, copépodos y branquiópodos presentes en un humedal del departamento del Tolima, Colombia

Carranza-Castillo

Gordillo-Guerra

Reinoso-Flórez

2021

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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La comunidad zooplanctónica es muy diversa en la zona tropical y tiene un papel importante en el flujo de energía de la red trófica, además, su alta tasa de crecimiento le permite responder rápidamente a cambios ambientales en la columna de agua. En este estudio se identificaron hasta el mínimo nivel taxonómico posible los rotíferos, copépodos y branquiópodos en un humedal de zonas bajas del departamento del Tolima, y se estimó su abundancia y las posibles relaciones con las variables fisicoquímicas. Se hicieron muestreos mensuales puntuales utilizando una red de filtrado y en cada época de muestreo se tomaron muestras de agua para el análisis de las variables fisicoquímicas y bacteriológicas. El conteo y la identificación se hicieron con una cámara de sedimentación SedgwickRafter. La comunidad estaba compuesta por 30 géneros, 23 de ellos correspondientes a rotíferos, seguidos de los copépodos con cuatro y los cladóceros con tres. La densidad de la comunidad podría estar condicionada por las precipitaciones y las macrófitas. A nivel fisicoquímico, la alcalinidad fue la única variable con un valor significativo en los muestreos. Por último, los rotíferos presentaron una mayor diversidad, abundancia y riqueza en todos los muestreos debido a su adaptabilidad y dominancia en la zona tropical.

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El zooplancton de los grandes ríos sudamericanos con planicie de inundación

Cited by 10 publications

References 84 publications

Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

Zooplankton communities and their relationship with water quality in eight reservoirs from the midwestern and southeastern regions of Brazil

Rotíferos, copépodos y branquiópodos presentes en un humedal del departamento del Tolima, Colombia

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