Plankton community dynamics over short periods at Jacaré-Pepira Reservoir, State of São Paulo, Brazil

Fonseca, Claudia Padovesi

doi:10.1080/03680770.1995.11900760

Cited by 3 publications

(3 citation statements)

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“…Among the factors that influence this variation, we may consider changes in abiotic variables and food resource availability and biotic relationships, as competition, coexistence and predation (hernández-trujillo et al, 2010). Clear daily variations of the zooplankton abundance were also observed by Fonseca (1997) in a Brazilian reservoir (state of São Paulo), which were ascribed to the daily changes in the limnological variables, such as nutrient concentrations and water transparency. The abundance of the zooplankton community registered in the present study presented a pattern similar to that of phytoplankton community (Borges et al, 2008).…”

Section: Discussionmentioning

confidence: 97%

“…Zooplankton organisms commonly present variations in abundance over several time scales (Marazzo & Valentin, 2000), including short time scales (lienesch & Matthews, 2000). Tropical zooplankton dynamics has been reported with seasonal and yearly fluctuations, although there is some discussion about the importance of events occurring over short time periods, such as monthly or daily as they relate to the dynamics of aquatic communities (Fonseca, 1997;Borges et al, 2008;hernández-trujillo et al, 2010).…”

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confidence: 99%

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Daily variation of zooplankton abundance and evenness in the Rosana reservoir, Brazil: biotic and abiotic inferences

Takahashi

Lansac‐Tôha

Dias

et al. 2014

Iheringia, Sér. Zool.

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ABSTRACT. The zooplankton community presents stochastic temporal fluctuation and heterogeneous spatial variation determined by the relationships among the organisms and environmental conditions. We predicted that the temporal and spatial zooplankton distribution is heterogeneous and discrete, respectively, and that the daily variation of most abundant species is related to environmental conditions, specifically the availability of resources. Zooplankton samples were collected daily at three sampling stations in a lateral arm of the Rosana Reservoir (SP/PR). The zooplankton did not present significant differences in abundance and evenness among sampling stations, but the temporal variation of these attributes was significant. Abiotic variables and algal resource availability have significantly explained the daily variation of the most abundant species (p<0.001), however, the species distribution makes inferences on biotic relationships between them. Thus, not only the food resource availability is influential on the abundance of principal zooplankton species, but rather a set of factors (abiotic variables and biotic relationships). KEYWORDS.Temporal variation, rotifers, microcrustaceans, coexistence, competition. RESUMO. Variação diária da abundância e equitabilidade do zooplâncton no reservatório de Rosana, Brasil: inferências bióticas e abióticas.A comunidade zooplanctônica apresenta flutuação temporal estocástica e variação espacial heterogênea que são determinadas pelas relações entre os organismos e condições ambientais. Acredita-se que a distribuição temporal e espacial do zooplâncton seja heterogênea e discreta, respectivamente; e que a variação diária das espécies mais abundantes está relacionada às condições ambientais, principalmente, disponibilidade de recursos. As amostras de zooplâncton foram coletadas diariamente em três estações de amostragem em um braço lateral do reservatório de Rosana (SP/PR). O zooplâncton não apresentou diferenças significativas na abundância e equitabilidade entre as estações de amostragem, no entanto, a variação temporal desses atributos foi significativa. As variáveis abióticas e a disponibilidade de recurso algal explicou significativamente a variação diária das espécies mais abundantes (p<0,001), entretanto, a distribuição das espécies faz inferências sobre relações bióticas entre elas. Assim, não só a disponibilidade de recurso alimentar é influente na abundância das principais espécies zooplanctônicas, mas sim um conjunto de fatores (variáveis abióticas e relações bióticas).

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Section: Discussionmentioning

confidence: 97%

mentioning

confidence: 99%

Daily variation of zooplankton abundance and evenness in the Rosana reservoir, Brazil: biotic and abiotic inferences

Takahashi

Lansac‐Tôha

Dias

et al. 2014

Iheringia, Sér. Zool.

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“…No se encontró en el lago Boa la asociación típica de zoomas de aguas de origen amazónico integrada por las especies mencionadas del genero Brachionus y por Keratella americana (Schaden, 1978). La predominancia de rotíferos dentro de la comunidad mesozooplanctónica del lago Boa podría deberse a que estos organismos son oportunistas y predominan en ambientes inestables o muy variables (Fonseca, 1997).…”

Section: Discusi óNunclassified

Acoplamiento entre las comunidades planctónicas de un lago amazónico de aguas claras (lago Boa, Colombia)

Pinilla¹,

Canosa²,

Vargas³

et al. 2007

Limnetica

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Acoplamiento entre las comunidades planctónicas de un lago amazónico de aguas claras (lago Boa, Colombia)Las comunidades planctónicas de un lago están relacionadas entre sí de diversas maneras. Para los lagos amazónicos colombianos poco es lo que se conoce sobre este acoplamiento. Se realizaron siete visitas al lago Boa (Caquetá Medio) desde mayo de 1999 a mayo de 2000, durante las cuales se tomaron muestras de bacterioplancton, fitoplancton, nanozooplancton (protozoos) y rotíferos y crustáceos (mesozooplancton) para conocer sus variaciones y sus relaciones numéricas a lo largo del ciclo hidrológico. Los promedios de abundancias de individuos por litro fluctuaron entre 4.1 • 10 9 a 1.4 • 10 10 bacterias, 5.5 • 10 3 a 6.4 • 10 6 microalgas, 2.2 • 10 4 a 1.1 • 10 5 protozoos nanoplanctónicos y 8.1 a 240 organismos mesozooplanctónicos (rotíferos y crustáceos). Todas las comunidades tuvieron mayores abundancias en el periodo de aguas bajas, cuando el lago se desconectó del río Metá. El fitoplancton fue muy diverso y poco abundante; los grupos dominantes fueron las clorofitas, dinofitas y cianobacterias. El mesozooplancton fue escaso y estuvo compuesto principalmente por rotíferos. Dentro de los protozoos nanoplanctónicos predominaron los ciliados. Se halló una asociación estadística significativa entre las abundancias totales del fitoplancton y del bacterioplancton (p = 0.0001), lo cual sugiere algún grado de interdependencia de las dos comunidades. Durante los meses de inundación la fuerza física del pulso hidrológico parece causar que las comunidades funcionen con mayor autonomía, ya que en esta época el lago Boa se comporta como un verdadero sistema lótico.

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Response of phytoplankton assemblages isolated for short periods of time in a hyper-eutrophic reservoir (Lake Chivero, Zimbabwe)

Mhlanga

Tendaupenyu

2014

WSA

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The response of phytoplankton assemblages isolated in enclosures for short periods of time was examined in hypereutrophic Lake Chivero (Harare, Zimbabwe), to determine the factors that influenced the structure of the phytoplankton community, after noticing a marked decline in the dominance of Microcystis aeruginosa in recent years. The phytoplankton assemblage in the lake during summer, winter and the end of winter was dominated by Cryptomonas sp. and Cyclotella sp., with an average relative abundance of > 95%, based on phytoplankton biomass estimations. Isolation in summer resulted in the exclusion of Cyclotella sp., a decline of Cryptomonas sp. and an increase in M. aeruginosa and Anabaena sp. In winter, when M. aeruginosa was absent in the inoculum, isolation resulted in an increase in Cryptomonas sp. biomass and a decline of Cyclotella sp. At the end of winter Cryptomonas sp. initially increased but later declined following the increase in chlorophytes. The non-equilibrium state in Lake Chivero caused pioneer species to dominate rather than M. aeruginosa.

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Plankton community dynamics over short periods at Jacaré-Pepira Reservoir, State of São Paulo, Brazil

Cited by 3 publications

References 5 publications

Daily variation of zooplankton abundance and evenness in the Rosana reservoir, Brazil: biotic and abiotic inferences

Daily variation of zooplankton abundance and evenness in the Rosana reservoir, Brazil: biotic and abiotic inferences

Acoplamiento entre las comunidades planctónicas de un lago amazónico de aguas claras (lago Boa, Colombia)

Response of phytoplankton assemblages isolated for short periods of time in a hyper-eutrophic reservoir (Lake Chivero, Zimbabwe)

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