Zooplanktonic community of six reservoirs in northeast Brazil

Almeida, Viviane L. S.; Dantas, Ênio Wocyli; Júnior, Mauro de Meló; Bittencourt-Oliveira, M. C.

doi:10.1590/s1519-69842009000100007

Cited by 39 publications

(24 citation statements)

References 23 publications

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“…They are generally present in great numbers and with high species richness in tropical zooplankton, being opportunistic organisms capable of colonizing a wide variety of habitats, from temporarily flooded areas (Koste & Robertson 1990, Lima et al 1996, Garcia et al 1998, Martínez et al 2000, LansacTôha et al 2009) to large rivers, lakes and reservoirs (Oliveira Neto & Moreno 1999, Aoyagui & Bonecker. 2004, Sendacz et al 2006, Corgosinho & Pinto-Coelho, 2006, Almeida et al 2009, Borges & Pedrozo, 2009.…”

Section: Introductionmentioning

confidence: 99%

The influence of environmental factors on the seasonal dynamics and composition of Rotifera in the Sapucaí River arm of Furnas Reservoir, MG, Brazil

2010

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The influence of environmental factors on the seasonal dynamics and composition of Rotifera in the Sapucaí River arm of Furnas Reservoir, MG, Brazil. Biota Neotrop. 10(4): http://www.biotaneotropica.org.br/v10n4/en/ abstract?article+bn03510042010.Abstract: Seasonal fluctuations in the dynamics of the plankton rotifer populations in an oligo-mesotrophic branch of a tropical reservoir were analyzed with respect to the possible influence of environmental conditions (physical, chemical and biological), with emphasis on biological interactions. Samples were taken monthly from August 2006 to July 2007. The well-defined climatic seasons were reflected in variations of the physical and chemical properties of the water. The zooplankton community consisted mainly of Rotifera, Cladocera and Copepoda, with occasional representatives of Chaoborus brasiliensis (Diptera), Ostracoda, Protozoa and Turbellaria. Rotifera was the dominant group in zooplankton community in 5 of the 12 months of the study and were represented by 35 taxa. Redundancy analysis between the rotifer population abundances and the set of environmental variables showed significant (p < 0.05) positive correlations with the chlorophyll a in the rainy season. In the dry period, predation was probably the environmental factor that had the strongest effect on rotifer populations; in particular, the density of the cyclopoid Thermocyclops decipiens showed significant (p < 0.05) negative correlations with many of the rotifer population abundances. In addition, analysis of the co-occurrence of different rotifer species indicated strong competitive interactions between populations, during the rainy period (p < 0.001). Among the biotic environmental factors analyzed, algal biomass had an important role during the rainy period and interrotifer competition was also significant in these months. It was probably that predation by the cyclopoid copepod Thermocyclops decipiens determined the structure and dynamics of the rotifer populations in the Sapucaí arm of the Furnas reservoir, during the dry period. Resumo: Mudanças na dinâmica sazonal dos rotíferos planctônicos em uma porção oligo-mesotrófica de um reservatório tropical foram avaliadas em relação às variáveis ambientais (físicas, químicas e biológicas). As coletas foram realizadas mensalmente de agosto de 2006 a julho de 2007. As estações climáticas foram bem definidas, refletindo em variações nas características físicas e químicas da água. A comunidade zooplanctônica foi representada pelos grupos: Rotifera, Cladocera, Copepoda, e ocasionalmente por Chaoborus brasiliensis (Diptera), Ostracoda, Protozoa e Turbellaria. Os Rotifera foram dominantes na comunidade em cinco dos 12 meses amostrados, tendo sido representados por 35 taxa. A análise de redundância entre as densidades das populações de Rotifera e as diversas variáveis ambientais indicou correlação positiva significativa (p < 0.05) com a concentração de clorofila a no período chuvoso. No período seco, provavelmente a predação foi o fator ambiental que mais influe...

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Section: Introductionmentioning

confidence: 99%

The influence of environmental factors on the seasonal dynamics and composition of Rotifera in the Sapucaí River arm of Furnas Reservoir, MG, Brazil

2010

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“…Com relação ao zooplâncton de reservatórios no Brasil, a maior parte dos trabalhos vêm sendo realizados em ecossistemas das regiões Sudeste, Sul e Centro-Oeste, tais como nos reservatórios da Pampulha em Minas Gerais, Monte Alegre e Jurumirim em São Paulo, Segredo no Paraná e Paranoá no Distrito Federal (CABIANCA & SENDACZ, 1985;MATSUMURA-TUNDISI et al, 1990;ARCIFA et al, 1998;GÜNTZEL & ROCHA, 1998;BRANCO & CAVALCANTI, 1999;LANDA & MOURGUÉS-SCHURTER, 1999;MATSUMURA-TUNDISI, 1999;PINTO-COELHO et al, 1999;NOGUEIRA, 2001;PANARELLI et al, 2001;CASANOVA & HENRY, 2004;PINTO-COELHO et al, 2005a,b;SANTOS-WISNIEWISK & ROCHA, 2007;GONZÁLEZ et al, 2008;ALMEIDA et al, 2009). Entretanto, na região Nordeste esses trabalhos podem ser considerados ainda escassos (BOZZELLI & HUSZAR, 2003).…”

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Efeito das variáveis abióticas e do fitoplâncton sobre a comunidade zooplanctônica em um reservatório do Nordeste brasileiro

Dantas

Almeida

Barbosa

et al. 2009

Iheringia, Sér. Zool.

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ABSTRACT. Abiotic variables and phytoplankton effects on zooplanktonic community from a reservoir in northeast Brazil. Zooplankton from Mundaú reservoir, State of Pernambuco, northeast Brazil was studied concerning temporal (hours and seasonal period) and spatial (pelagic and coastal regions in different depths) variabilities, correlating them to the environmental variables and the phytoplankton. Twenty-three infrageneric and five subgeneric zooplankton taxa were observed. On the whole, Rotifera was the dominant group during this study, especially influenced by the oxygen concentrations. Phytoplankton was dominated by Cyanobacteria. On the dry period, physical variables certainly controlled the zooplankton's development, allowing elevated algal densities. On the rainy period, zooplankton correlation with the system's nutrients levels on pelagic region probably conduced to a resources competition between phytoplankton and zooplankton, controlling algal densities.KEYWORDS. Dynamic, zooplanktonic community, reservoir, northeast Brazil. RESUMO.O zooplâncton do reservatório de Mundaú, Pernambuco, nordeste do Brasil foi estudado quanto a variabilidade temporal (entre os horários e períodos seco chuvoso) e espacial (nas regiões pelágica e litorânea em diferentes profundidades) correlacionando-as com as variáveis ambientais e com o fitoplâncton. Vinte e três táxons infragenéricos e cinco subgenéricos de zooplâncton foram encontrados. De forma geral, Rotifera foi o grupo dominante em todo o estudo. O fitoplâncton foi dominado pelas cianobactérias. No período seco, as variáveis físicas certamente controlaram o desenvolvimento do zooplâncton, favorecendo o estabelecimento de elevadas densidades algais. No período chuvoso, a correlação do zooplâncton com os níveis de nutrientes do sistema na região pelágica provavelmente conduziu a uma competição de recursos entre o fitoplâncton e o zooplâncton, controlando as densidades algais. PALAVRAS-CHAVE.Dinâmica, comunidade zooplanctônica, reservatório, nordeste do Brasil.

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“…According to Maltchik (2000), the semiarid lakes are considered true biodiversity hotspots and perhaps therefore the richness of cladocerans in the Pimenteira temporary pond can be considered high when compared with other studies performed in artificial lentic environments (Crispim and Watanabe, 2001;Melo Júnior et al, 2007;Almeida et al, 2009). In the Neotropical region, Aranguren-Riaño et al (2011) analyzed 15 large lentic ecosystems and recorded a total of 19 cladoceran species, leading the authors to conclude that this richness was related to the large catchment area of the springs.…”

Section: Discussionmentioning

confidence: 99%

Cladocera (Crustacea, Branchiopoda) of a temporary shallow pond in the Caatinga of Pernambuco, Brazil

et al. 2013

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-The aim of this study was to describe the composition and structure of cladocerans of littoral areas with and without macrophytes from a temporary shallow pond in the Caatinga of Pernambuco state (Brazil). Samples were taken between June 2011 and August 2012. The sampling of cladocerans and environmental variables was performed at four fixed points, using a plankton net (45 μm) and a multiparameter probe. Twenty-two cladoceran species were recorded, with two new occurrences for Pernambuco state: Chydorus cf. brevilabris and Macrothrix superaculeata. The species richness of non-planktonic cladocerans (16) was higher than that of planktonic ones (4). The mean density was 186.7 ± 273.6 ind. L -1 . Macrothrix elegans, Diaphanosoma spinulosum and Ephemeroporus hybridus were the most abundant. The fluctuation index of the main species showed greater instability during the driest months or greater rainfall, a pattern not observed for the environmental data. However, the pond did not show limnological and cladoceran structure differences between the dry and rainy seasons and between the areas with and without macrophytes. With the exception of temperature and rainfall, the structure and richness of cladocerans was not related to the fluctuation of the other variables. Warmer months had higher densities and richness of cladocerans. On the other hand, months of greatest rainfall had lower richness, especially for the Chydoridae family. Although this Caatinga pond is maintained exclusively by rainwater, the richness of cladocerans is high when compared to other tropical and subtropical ecosystems. These results suggest that rainfall and temperature exert greater control on the dynamics of cladocerans in the Caatinga's temporary shallow ponds, and demonstrate the importance of these ecosystems to biodiversity in the semiarid region.

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Zooplanktonic community of six reservoirs in northeast Brazil

Cited by 39 publications

References 23 publications

The influence of environmental factors on the seasonal dynamics and composition of Rotifera in the Sapucaí River arm of Furnas Reservoir, MG, Brazil

The influence of environmental factors on the seasonal dynamics and composition of Rotifera in the Sapucaí River arm of Furnas Reservoir, MG, Brazil

Efeito das variáveis abióticas e do fitoplâncton sobre a comunidade zooplanctônica em um reservatório do Nordeste brasileiro

Cladocera (Crustacea, Branchiopoda) of a temporary shallow pond in the Caatinga of Pernambuco, Brazil

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