Plankton diversity and limnological characterization in two shallow tropical urban reservoirs of Pernambuco State, Brazil

Almeida, Viviane L. S.; Melão, Maria da Graça Gama; Moura, Ariadne do Nascimento

doi:10.1590/s0001-37652012005000027

Cited by 17 publications

(11 citation statements)

References 23 publications

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“…Thus, this community is not well studied and thus little understood. Therefore, assess this community is important to understand its structure and dynamics, particularly in semi-arid region where drought and rain are a key factor in the hydrological dynamics and ecological processes (Almeida et al, 2012;Eskinazi-Sant'Anna et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Periphytic algae dynamics in lentic ecosystems in the Brazilian semiarid

et al. 2016

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The hydrological periods drive the structure and organization of aquatic communities in semiarid regions. We hypothesize that a decrease of the precipitation during the dry period will favor the development of the periphytic algal community, leading to higher richness and density in this period. To test this hypothesis, we investigated the changes in the periphytic algal community structure in three shallow and eutrophic ecosystems of the Brazilian semiarid. The sampling was performed between 2007 and 2010 at two-mensal intervals. The sampling of periphytic algal was performed in aquatic macrophytes and rocks. The abiotic variables were analyzed simultaneously. Dominance in diatoms, cyanobacteria and chlorophytes, respectively, was observed in two periods. In the dry period, waters were alkaline and had high concentrations of nitrate and total phosphorus associated with the highest densities of Bacillariophyceae. In the rainy period the water was warmer, oxygenated and high concentrations of ammonia and soluble reactive phosphorus with diatoms remained dominant but with reduced density, while cyanobacteria and chlorophytes increased. Overall, periphytic algal community composition no responded to changes in the hydrological periods. However, the hydrological periods altered the dynamics of periphytic algal community, supported by the alternation of the most representative classes (diatoms and cyanobacteria) between the hydrologic periods. Our data suggest that the morphometric and chemical and physical characteristics of lentic aquatic ecosystems studied were more important in the dynamics of periphytic algal community than the hydrological periods and types of substrates.Keywords: seasonality, reservoirs, lentic aquatic ecosystems, periphyton. Estrutura da comunidade de algas perifíticas do semiárido brasileiro ResumoOs períodos hidrológicos impulsionam a estrutura e organização das comunidades aquáticas em regiões semiáridas. Nós hipotetizamos que uma diminuição da precipitação durante o período seco irá favorecer o desenvolvimento da comunidade de algas perifíticas, levando a uma maior riqueza e densidade nesse período. Para testar esta hipótese, nós investigamos as mudanças na estrutura da comunidade de algas perifíticas em três ecossistemas rasos e eutróficos do semiárido brasileiro. As amostragens foram realizadas entre 2007 e 2010 em intervalos de bimensais. A amostragem das algas perifíticas foi realizada em macrófitas aquáticas e rochas. As variáveis abióticas foram analisadas simultaneamente. A dominância de diatomáceas, cianobactérias e clorófitas, respectivamente, foi observada em todos os períodos. No período seco, as águas foram alcalinas com altas concentrações de nitrato e fósforo total associado às maiores densidades de Bacillariophyceae. Durante o período chuvoso as águas apresentaram-se mais quentes, oxigenadas e com altas concentrações de amônia e fósforo reativo solúvel. As diatomáceas permaneceram dominantes, mas com densidade reduzida, enquanto as cianobactérias e clorofíceas aumen...

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Section: Introductionmentioning

confidence: 99%

Periphytic algae dynamics in lentic ecosystems in the Brazilian semiarid

et al. 2016

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“…In this hypereutrophic reservoir (Almeida et al . ), the aquaculture activity is based in fish culture in net‐tanks or cage farms developed since 2004. Besides, in 1998, before the introduction of these aquaculture systems, the Saco reservoir was already considered as hypereutrophic (Bouvy et al .…”

Section: Methodsmentioning

confidence: 99%

“…); however, the knowledge of planktonic rotifers in the semiarid region is virtually non‐existent, consisting mostly of temporal and restricted studies, even this region occupying more than 85% of the territory of the north‐east of Brazil. We hypothesized that the ecological attributes (composition, abundance, diversity and trophic groups) of the rotifer community from a Neotropical hypereutrophic semiarid reservoir (Bouvy, Pagano & Troussellier ; Almeida, Melão & Moura ) are different when considering the associated fish‐farming systems, which could both be affected by different management. We believe that these ecological attributes can be altered by increased nutrient input from aquaculture.…”

Section: Introductionmentioning

confidence: 99%

Rotifer community structure in fish-farming systems associated with a Neotropical semiarid reservoir in north-eastern Brazil

et al. 2017

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The study was conducted to assess the community structure of planktonic rotifers and their relation to the environmental impact of Nile tilapia, Oreochromis niloticus (Linaeus, 1758), aquaculture activities (ponds and net-tanks), associated with a Neotropical semiarid reservoir in Brazil. Our hypothesis was that the ecological attributes of the rotifer community were different when considering the influence of fish aquaculture activities. We identified 28 species, with 10 species from the Brachionidae family. The average density and diversity index of rotifers were higher in reservoir stations, with mean values in the ponds approximately 50% lower than those of the reservoir. The microphagous species dominated during all the time, while the raptorial species were accidental in all studied environments. The ponds were represented by four significant indicator species: Brachionus caudatus, B. leydigi, Dicranophoroides caudatus and Testudinella patina and the reservoir by three: B. falcatus, B. havanaensis and Conochilus dossuarius. In general, nine species were significantly associated with some categories of environmental conditions, such as high or low turbidity and low values of conductivity and TDS. Four of the five best bioindicator species belonged to the microphagous genus Brachionus. B. havanaensis indicated five environmental conditions (IndVal > 93.1%), and it appeared to be a key species in this Neotropical semiarid reservoir influenced by aquaculture activities. The dominance of microphagous rotifers suggests a functional redundancy of species in the studied environments. We found that these systems and their management affected the planktonic rotifer community in this region of Brazil by increasing the species richness.

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“…De fato, os diferentes usos e estratégias de manejo de reservatórios rasos afetam a constituição da biota como um todo, tendendo a reduzir a biodiversidade em condições eutróficas ocasionadas pelos impactos humanos (Moss 2017). Nesse contexto, a aplicação de índices biológicos para as comunidades zooplanctônicas em reservatórios em diferentes estados tróficos mostra-se sensível na avaliação da qualidade da água, evidenciando o potencial de organismos como os rotíferos na caracterização das condições ambientais de sistemas aquáticos (Almeida et al 2012).…”

Section: Introductionunclassified