Work

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

Year: 2014

Type: article

Abstract: 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

Source: Acta Scientiarum Biological Sciences

DOI: 10.4025/actascibiolsci.v36i2.19084

Authors: Danielle Goeldner Pereira, Luzia Cleide Rodrigues, Fábio Amodêo Lansac-Tôha, Luiz Felipe Machado Velho

Institution: Universidade Estadual de Maringá

Language: English

Topic: Aquatic Ecosystems and Phytoplankton Dynamics

Subfield: Environmental Chemistry

Field: Environmental Science

Domain: Physical Sciences

SDG: Life below water

Open Access status: diamond

Funder: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior