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Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa

The occurrence of Microcystis blooms is a worldwide concern due to the numerous adverse effects on zooplankton. We therefore hypothesized that the cyanobacterium Microcystis aeruginosa is harmful to rotifer growth. Population and individual experiments were conducted with the same proportional volum...

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Autores principales: Liang, Ye, Ouyang, Kai, Chen, Xinglan, Su, Yuqi, Yang, Jiaxin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322320/
https://www.ncbi.nlm.nih.gov/pubmed/28230067
http://dx.doi.org/10.1038/srep43127
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author Liang, Ye
Ouyang, Kai
Chen, Xinglan
Su, Yuqi
Yang, Jiaxin
author_facet Liang, Ye
Ouyang, Kai
Chen, Xinglan
Su, Yuqi
Yang, Jiaxin
author_sort Liang, Ye
collection PubMed
description The occurrence of Microcystis blooms is a worldwide concern due to the numerous adverse effects on zooplankton. We therefore hypothesized that the cyanobacterium Microcystis aeruginosa is harmful to rotifer growth. Population and individual experiments were conducted with the same proportional volumes of Chlorella and Microcystis for given food densities. Life-table parameters, life-history traits, and the grazing intensity of Brachionus calyciflorus were evaluated after they had fed on microcystin-producing and microcystin-free Microcystis, both alone and combined with an edible alga (Chlorella pyrenoidosa), at concentrations of 1 × 10(5), 1 × 10(6), and 1 × 10(7) cells mL(−1). The results showed that the interactive effects of food density and type appeared to be synergistic on generation time (T), net reproduction rate (R(0)), body length, swimming speed, and reproduction time. In contrast, these effects appeared to be antagonistic on intrinsic growth rate (r), finite rate of increase (λ), time to first brood, post-reproductive time and total offspring per female. The grazing rate of rotifers decreased with grazing time. Although the toxins released after grazing on M. aeruginosa had negative effects on rotifer growth and reproduction, B. calyciflorus changed its life strategy and grazing intensity in response to eutrophic conditions.
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spelling pubmed-53223202017-03-01 Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa Liang, Ye Ouyang, Kai Chen, Xinglan Su, Yuqi Yang, Jiaxin Sci Rep Article The occurrence of Microcystis blooms is a worldwide concern due to the numerous adverse effects on zooplankton. We therefore hypothesized that the cyanobacterium Microcystis aeruginosa is harmful to rotifer growth. Population and individual experiments were conducted with the same proportional volumes of Chlorella and Microcystis for given food densities. Life-table parameters, life-history traits, and the grazing intensity of Brachionus calyciflorus were evaluated after they had fed on microcystin-producing and microcystin-free Microcystis, both alone and combined with an edible alga (Chlorella pyrenoidosa), at concentrations of 1 × 10(5), 1 × 10(6), and 1 × 10(7) cells mL(−1). The results showed that the interactive effects of food density and type appeared to be synergistic on generation time (T), net reproduction rate (R(0)), body length, swimming speed, and reproduction time. In contrast, these effects appeared to be antagonistic on intrinsic growth rate (r), finite rate of increase (λ), time to first brood, post-reproductive time and total offspring per female. The grazing rate of rotifers decreased with grazing time. Although the toxins released after grazing on M. aeruginosa had negative effects on rotifer growth and reproduction, B. calyciflorus changed its life strategy and grazing intensity in response to eutrophic conditions. Nature Publishing Group 2017-02-23 /pmc/articles/PMC5322320/ /pubmed/28230067 http://dx.doi.org/10.1038/srep43127 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Liang, Ye
Ouyang, Kai
Chen, Xinglan
Su, Yuqi
Yang, Jiaxin
Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa
title Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa
title_full Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa
title_fullStr Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa
title_full_unstemmed Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa
title_short Life strategy and grazing intensity responses of Brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free Microcystis aeruginosa
title_sort life strategy and grazing intensity responses of brachionus calyciflorus fed on different concentrations of microcystin-producing and microcystin-free microcystis aeruginosa
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5322320/
https://www.ncbi.nlm.nih.gov/pubmed/28230067
http://dx.doi.org/10.1038/srep43127
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