<b>Planktonic heterotrophic nanoflagellate abundance along a trophic gradient in subtropical reservoirs: influence of a bottom-up or top-down control mechanism

  • Danielle Goeldner Pereira Universidade Estadual de Maringá
  • Luzia Cleide Rodrigues Universidade Estadual de Maringá
  • Fábio Amodêo Lansac-Tôha Universidade Estadual de Maringá
  • Luiz Felipe Machado Velho Universidade Estadual de Maringá

Resumo

The aim of the current study was to assess the variability in heterotrophic nanoflagellate abundance attributable to variables responsible for the influence of bottom-up and top-down control mechanisms in the plankton food web along a trophic gradient in subtropical reservoirs (Paraná State,Brazil). In particular, we hypothesised that food resources were the main determinant for the abundance of heterotrophic nanoflagellates (HNF) along a trophic gradient. Results showed that HNF communities were weakly influenced by the bottom-up mechanism. Moreover, there was evidence of a slight influence from a top-down control mechanism on this community. Therefore, the results of the present study did not corroborate the hypothesis initially proposed, and further studies are needed to elucidate the complex outcomes of trophic gradients on planktonic HNF communities, including other predictor variables related to abiotic interactions, such as morphometrics, hydrology, priorities uses and climate conditions

 

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Biografia do Autor

Danielle Goeldner Pereira, Universidade Estadual de Maringá
Laboratório de Ecologia Teórica e Síntese, Departamento de Ecologia, Instituto de Ciências Biológicas (ICB 1). Ecologia de organismos planctonicos
Fábio Amodêo Lansac-Tôha, Universidade Estadual de Maringá

Departamento de Ciências Biológicas. Nupelia/PEA

Luiz Felipe Machado Velho, Universidade Estadual de Maringá
Nupelia/PEA
Publicado
2014-05-08
Como Citar
Pereira, D. G., Rodrigues, L. C., Lansac-Tôha, F. A., & Velho, L. F. M. (2014). <b&gt;Planktonic heterotrophic nanoflagellate abundance along a trophic gradient in subtropical reservoirs: influence of a bottom-up or top-down control mechanism. Acta Scientiarum. Biological Sciences, 36(2), 155-163. https://doi.org/10.4025/actascibiolsci.v36i2.19084
Seção
Ecologia e Limnologia

 

0.6
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0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus