Planktonic rotifers of Samborombón River Basin (Argentina)

Modenutti, Beatriz

doi:10.1007/978-94-011-4782-8_33

Cited by 11 publications

(22 citation statements)

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“…The specific richness was found to be higher than other lowland river of the province -Samborombón River- (Modenutti 1998) and environments from Santa Fe province -Salado River and Santa Fe River -(José de Paggi & Paggi 1998). Moreover, it is similar to that reported for the Delta subbasin belonging to the Río de la Plata estuary basin (Modenutti & Claps 1988).…”

Section: Discussionmentioning

confidence: 86%

“…The majority of the species found can develop in waters with a wide range of pH, whereas others prefer neutral to alkaline values. Variations in species number and density are associated with the river conductivity, since salinity is a limitation for rotifers (Guisande & Toja 1988, Green 1993, Modenutti 1998 The number of species differed between the main river channel and its tributaries, with maximum values in the middle sector and one affluent (Saladillo-Vallimanca stream). The lowest specific richness was recorded in the headwaters.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, the decrease of density during flood periods is the result of dilution (José de Paggi 1981, Vásquez & Sánchez 1984, Modenutti & Claps 1988, Modenutti 1998, José de Paggi & Paggi 1998. The species diversity reaches a maximum in flood periods and it is reduced considerably during low and middle water periods .…”

Section: Discussionmentioning

confidence: 99%

“…This predominance is the result of their rapid reproductive capacity during optimal conditions, their short generation time and their ability to develop large populations in eutrophic environments (Ghadouani et al 1998, Gosselain et al 1998, Lair et al 1998. (2) To date, the study of planktonic rotifers in the rivers and streams of Buenos Aires province is limited to the contributions of Kuczynski (1984), Modenutti & Claps (1988) and Modenutti (1991Modenutti ( , 1998. The rotifers constitute the main zooplankton group in the lowest sector of Salado River, but their abundance is lower than that recorded in a backwater pond.…”

Section: Introductionmentioning

confidence: 99%

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Planktonic rotifers of a saline-lowland river : the Salado River (Argentina)

Neschuk

Claps

Gabellone

2002

Ann. Limnol. - Int. J. Lim.

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Seasonal samples of zooplankton were taken during 1997-1999 at fifteen stations in the Salado River basin, and analysed in order to study the rotifer fauna. Spatio-temporal changes in the rotifer plankton composition were examined in the main channel and its tributaries. The majority of species found are tolerant of a wide range of pH, whereas others prefer neutral to alkaline values. The total rotifer plankton density increased downstream from the headwaters to the middle sector of the river. The associated shallow lakes and tributaries were an important source of species. Variations in density and number of species were shown to be associated with conductivity, and species tolerant of high conductivity conditions were especially prevalent (upper 7,000 (J.S cm -1 ). Rotifer density was influenced by hydrological conditions, which promoted maximum values during low water periods and in the high water condition promoted the incorporation of species from shallow lakes connected with the river during flood events. The species associations found are related to such water parameters as conductivity and nutrient availability and to the presence of ponds and shallow, waterlogged depressions connected in varying extent to the main channel.

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Planktonic rotifers of a saline-lowland river : the Salado River (Argentina)

Neschuk

Claps

Gabellone

2002

Ann. Limnol. - Int. J. Lim.

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“…(Trematoda) y Diorchis americana Ransom, 1909 (Cestoda) en Fulica ardesiaca Tschudi 1843 (Guillen & Morales 2003), moluscos como Physa venustula (Gould 1847), Drepanotrema kermatoides (Orbigny, 1835) y Ancylus concentricus (Orbigny 1835) (Vivar et al 1998), arañas como Tetragnathidae, Araneidae, Sicariidae y Palpimanidae (Duárez 1998), insectos acuáticos, principalmente Belostomatidae, Libellulidae, Dytiscidae e Hydrophilidae (García et al 1996), y aves como Podicipedidae, Pelecanidae, Sulidae, Ardeidae, Anatidae, Cathartidae, Falconidae, Rallidae, Charadriidae, Scolopacidae, Columbidae, Cuculidae, Strigidae, Furnariidae, Tyraniidae, Troglodytidae, Ploceidae y Fringillidae (Guillen & Barrio 1995, Valqui 2004, entre otros. Sin embargo, a pesar que los organismos zooplanctónicos son utilizados para monitorear la calidad del agua (Modenutti 1998, Riofrio 2002, Ramos 2004, Rejas et al 2005, éstos han sido pobremente evaluados en los Pantanos de Villa (Grosspietsh 1999). La composición y abundancia de las comunidades zooplanctónicas puede ser influenciada por numerosos factores físicos, químicos y biológicos (Bini et al 2001, Bledzki & Ellison 2003, Rejas et al 2005, Suárez-Morales et al 2005.…”

Section: Introduccionunclassified

Diversidad Y Abundancia De Comunidades Zooplanctonicas Litorales Del Humedal Pantanos De Villa, Lima, Peru

Iannacone

Alvariño

2007

Gayana (Concepc.)

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RESUMENPantanos de Villa es un humedal costero conformado por varios cuerpos de agua, permanentes y estacionales. Este ecosistema es reconocido internacionalmente como sitio RAMSAR y se encuentra ubicado al sur de la zona urbana de Lima, Perú. En junio y octubre de 2004 y en abril del 2005 se llevaron a cabo censos de la biodiversidad y abundancia de las comunidades zooplanctónicas litorales, representando a diferentes cuerpos de agua permanentes en un total de 21 puntos de muestreo. Las muestras de zooplancton fueron colectadas usando una red de plancton de 75mm de diámetro y una apertura de 120 mm, y fueron preservadas empleando una solución de formol azucarado al 4 %. Se determinaron algunos parámetros limnológicos como Oxígeno Disuelto (OD) (mg L -1 ), transparencia (cm), temperatura del agua (T agua ) (°C), temperatura del aire (T aire ) (°C) y profundidad máxima (cm) de cada cuerpo de agua. Los resultados indicaron la presencia de 43 taxa, siendo más abundantes y frecuentes los rotíferos Brachionus calyciflorus (Pallas 1776) y Epiphanes sensa (Müller 1773), los ostrácodos, el nemátodo Rhabdolaimus terrestris de Mann 1880 y el ciliado Vorticella campanula Ehrenberg, 1831. El número promedio de organismos·L -1 fue de 337±80 y el número promedio de taxa por punto de muestreo fue de 11,2±2,1. Existieron diferencias significativas en el OD, T agua y T aire entre las estaciones muestreadas. El análisis de componentes principales (ACP) indicó un componente conformado por OD, T agua y T aire y otro formado por la transparencia y la profundidad. Finalmente, se realizó la valoración de la diversidad alfa y beta de las comunidades zooplanctónicas de este ecosistema acuático estudiado con el fin de proponer medidas para su conservación.PALABRAS CLAVES: Cladóceros, copépodos, diversidad alfa, diversidad beta, limnología, rotíferos. ABSTRACTPantanos de Villa, is a coastal wetland conformed by several water bodies, permanent and seasonal. This ecosystem is internationally recognized as a RAMSAR site located in the south of the urban zone of Lima, Peru. In June 2004, October 2004 and April 2005, surveys of biodiversity and abundance of littoral zooplanktonic communities, representing to different permanent water bodies in 21 points of sampling in total were carried out. The samples of zooplancton were collected using a 75 µm of diameter plankton net and 120 mm of opening. The samples were preserved and fixed employing a solution of 4 % sweetened formalin. Some limnological parameters as dissolved oxygen (DO) (mg L -1 ), transparency (cm), water temperature (T water )(°C), air temperature (T air )(°C) and maximum depth of each water body were determined. The results indicated the presence of 43 taxa, being abundant and frequent rotifers Brachionus calyciflorus (Pallas 1776) and Epiphanes sensa (Müller 1773), ostracoda, nematoda Rhabdolaimus terrestris de Mann, 1880 and the ciliate Vorticella campanula Ehrenberg, 1831. Number of organism·L -1 was 337±80 and number of taxa by point of survey was 11.2±2.1. Significantly diffe...

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Influence of regional factors on zooplankton structure in a saline lowland river: the Salado River (Buenos Aires province, Argentina)

Claps

Gabellone

Neschuk

2008

River Research & Apps

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Knowledge of regional factors influencing zooplankton structure in a semiarid river must include both the main channel and any tributaries in order to identify spatial and temporal patterns along with the main factor that affect the zooplankton community. Accordingly, seasonal samples were taken during 1997-1999 at 15 stations in the Salado River basin, where 172 species were identified (53 protozoans, 88 rotifers and 31 crustaceans). Conductivity and temperature optima and tolerances were calculated for the evident taxa. Different assemblages were recognized by cluster analysis, on the basis of their temperature and conductivity preferences. With respect to the zooplankton assemblages, three zones can be distinguished along the longitudinal axis of the basin: (1) the headwaters (the effluent from large saline shallow lakes), (2) the inter-tributaries, and (3) the lower basin and associated shallow lakes. The spatial distribution of the assemblages was a result of the combined action of factors always promoting the dominance of rotifers. The influence of floodplain waters (backwater ponds, waterlogged depressions, flushing lakes) was attenuated progressively downstream, thus producing disadvantages for the crustaceans. The food availability and high nutrient concentrations related to land use in the headwaters favoured the co-dominance of cladocerans and copepods along with the rotifers in that region.

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Planktonic rotifers of Samborombón River Basin (Argentina)

Cited by 11 publications

References 10 publications

Planktonic rotifers of a saline-lowland river : the Salado River (Argentina)

Planktonic rotifers of a saline-lowland river : the Salado River (Argentina)

Diversidad Y Abundancia De Comunidades Zooplanctonicas Litorales Del Humedal Pantanos De Villa, Lima, Peru

Influence of regional factors on zooplankton structure in a saline lowland river: the Salado River (Buenos Aires province, Argentina)

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