Rotifers in different environments of the Upper Paraná River floodplain (Brazil): richness, abundance and the relationship with connectivity

Aoyagui, Anderson Setsuo Miyashiro; Bonecker, Cláudia Cósta

doi:10.1023/b:hydr.0000029980.49859.40

Cited by 69 publications

(52 citation statements)

References 25 publications

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“…The greatest density of rotifers was observed in lagoons due to the relative stability of these environments in terms of current velocities relative to the rivers. This result probably occurred due to the low current velocity of the river which promoted the development of plankton and consequently influenced the high density of rotifers in connected lagoons (Aoyagui and Bonecker, 2004). These were consistent to the results at site 2.…”

Section: Discussionsupporting

confidence: 89%

“…Landscape geometry can be an important factor and connectivity also can have an important effect on zooplankton community structure. Aoyagui and Bonecker (2004) found the highest values of species richness in the rivers and the lowest ones in isolated lagoons, and the abundances was different during different hydrological periods. Highest abundances during the high water period were observed in isolated lagoons, whereas connected lagoons had highest abundances during the low water period.…”

Section: Discussionmentioning

confidence: 88%

“…Connectivity of lakes and rivers, especially some urban lakes, were separated from each other because of the reconstructive activities of human such as enclosing lakes for aquaculture or impoldering lakes for building (Aoyagui and Bonecker, 2004;Cottenie and De Meester, 2003;Knösche, 2006). These obstructed lakes were usually eutrophicated for the input of sewage water, industrial wastewater or aquaculture water (Daniel et al, 1998;Correll, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Short-term effects of drawing water for connectivity of rivers and lakes on zooplankton community structure

Wu¹,

Liu²,

Zhang³

et al. 2008

Journal of Environmental Sciences

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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Short-term effects of drawing water for connectivity of rivers and lakes on zooplankton community structure

Wu¹,

Liu²,

Zhang³

et al. 2008

Journal of Environmental Sciences

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“…In the Alto Paraná floodplain, Aoyagui and Bonecker (2004) recorded higher Rotifera richness in connected than in isolated lakes during the high water period; this suggests that the higher numbers of Rotifera species are related to the Paraná River connection. On the other hand, Galindo et al (1994) found no relationship between micro-crustacean richness and inundated areas in Doñana National Park dune ponds (SW Spain).…”

Section: Discussionmentioning

confidence: 89%

Temporary fragmentation of a marginal lake and its effects on zooplankton community structure and organization

Nadai

Henry

2009

Braz. J. Biol.

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A river lateral lake (Coqueiral Lake marginal to Paranapanema River in its mouth zone into Jurumirim Reservoir, São Paulo, Brazil) presented fragmentation into four small isolated bodies of water during a prolonged drought period, disrupting the link with the river. The aim of this work was to compare the temporal modifications on zooplankton community structure (total abundance, species richness, and diversity) in the four water bodies. Zooplankton samplings and abiotic factor measurements were made in two periods -during isolation phase of the lake in relation to river and after re-establishment of hydrologic connectivity. A concentration effect on zooplankton abundance was recorded with drought progression, but without significant modifications in species richness and diversity. When the river inundation pulse occurred, a reduction in total zooplankton density was observed due to the dilution effect and a significant increase in species richness and diversity was recorded. Lateral water influx from the river to the lacustrine environment acts as a temporary disturbance factor on the zooplankton community structure. Zooplankton species composition presented some modifications between the two periods. Zooplankton organism drift in water from the river to the lake, removal of individuals from the aquatic macrophytes, and eclosion of resting eggs from sediment are probable factors that can increase zooplankton species richness immediately after lateral pulse inundation with water by the river.Keywords: fragmentation, lake, hydrologic connectivity, zooplankton, structure.Fragmentação temporária de lagoa marginal a um rio e seus efeitos na estrutura e organização da comunidade zooplanctônica ResumoUma lagoa lateral a um rio (Lagoa do Coqueiral marginal ao Rio Paranapanema na zona de sua desembocadura na Represa de Jurumirim, São Paulo, Brasil) apresentou segmentação em quatro corpos de água pequenos e isolados entre si quando, durante um período prolongado de seca, ocorreu ruptura da associação entre os dois ambientes. O objetivo deste trabalho foi comparar as modificações temporais na estrutura da comunidade zooplanctônica (abundância total, riqueza e diversidade de espécies) nestes quatro corpos de água. Em dois períodos -um, na fase de isolamento do lago em relação ao rio, e outro, na fase de restauração da conectividade hidrológica -foram efetuadas amostragens do zooplâncton e medidas de fatores abióticos. Um efeito de concentração na abundância do zooplâncton foi registrado com o avançar da seca, contudo sem alterações significativas na riqueza e diversidade de espécies. Com o pulso de inundação pelo curso de água, uma redução na densidade total do zooplâncton ocorreu na lagoa por efeito de diluição e um aumento substancial na riqueza e diversidade específica foi registrado. O influxo lateral de água do rio para o ambiente lacustre atua como fator de distúrbio na estrutura da comunidade zooplanctônica, de caráter temporário. A composição em espécies de zooplancton apresentou modificações na comparação ...

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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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Rotifers in different environments of the Upper Paraná River floodplain (Brazil): richness, abundance and the relationship with connectivity

Cited by 69 publications

References 25 publications

Short-term effects of drawing water for connectivity of rivers and lakes on zooplankton community structure

Short-term effects of drawing water for connectivity of rivers and lakes on zooplankton community structure

Temporary fragmentation of a marginal lake and its effects on zooplankton community structure and organization

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

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