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Do magnetic phosphorus adsorbents used for lake restoration impact on zooplankton community?

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2019

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Álvarez-Manzaneda, Inmaculada
Guerrero, Francisco
Funes, Ana
Cruz-Pizarro, Luis
de Vicente, Inmaculada

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https://doi.org/10.1016/j.scitotenv.2018.11.375
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The Science of the Total Environment. Elsevier. 2019, 656, pp. 598-607. ISSN 0048-9697. eISSN 1879-1026. Available under: doi: 10.1016/j.scitotenv.2018.11.375

Zusammenfassung

Magnetic microparticles (MPs) have been recently proposed as innovative and promising dissolved inorganic phosphorus (DIP) adsorbents. However, before using them in a whole-lake restoration project, it is essential to assess their toxicological effects (direct and indirect) on aquatic biota. In the present study we hypothesized that zooplankton community is affected by MPs used for lake restoration. To test our hypothesis we designed a microcosms experiment (n = 15) containing lake water and surface sediment from a hypertrophic lake. Temporal changes (70 days) on physico-chemical conditions and on zooplankton structure (rotifers, copepods and branchiopods) were monitored under different scenarios. In particular, three different treatments were considered: no addition of MPs (control) and MPs addition (1.4 g MPs L-1) on the surface water layer (T-W) and on the sediment (T-S). After 24 h of contact time, MPs were removed with a magnetic rake. A total of 15 zooplankton species (12 rotifers, 1 branchiopod and 2 copepods) were recorded and a high abundance of zooplankton was registered during the experiment for all treatments. No significant differences (RM-ANOVA test; p > 0.05) in total abundance, species richness and species diversity among treatments were found. The absence of any effect of MPs on zooplankton can be explained because MPs did not significantly alter any of its physico-chemical (e.g. temperature, pH, O2) or biological (e.g. food quantity and quality) drivers. These results confirm the suitability of MPs as a promising tool for removing DIP in eutrophic aquatic ecosystems.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie

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Magnetic particles, Toxicity, Zooplankton, Lake restoration

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ISO 690ÁLVAREZ-MANZANEDA, Inmaculada, Francisco GUERRERO, Ana DEL ARCO, Ana FUNES, Luis CRUZ-PIZARRO, Inmaculada DE VICENTE, 2019. Do magnetic phosphorus adsorbents used for lake restoration impact on zooplankton community?. In: The Science of the Total Environment. Elsevier. 2019, 656, pp. 598-607. ISSN 0048-9697. eISSN 1879-1026. Available under: doi: 10.1016/j.scitotenv.2018.11.375
BibTex
@article{AlvarezManzaneda2019-03-15magne-57394,
  year={2019},
  doi={10.1016/j.scitotenv.2018.11.375},
  title={Do magnetic phosphorus adsorbents used for lake restoration impact on zooplankton community?},
  volume={656},
  issn={0048-9697},
  journal={The Science of the Total Environment},
  pages={598--607},
  author={Álvarez-Manzaneda, Inmaculada and Guerrero, Francisco and Del Arco, Ana and Funes, Ana and Cruz-Pizarro, Luis and de Vicente, Inmaculada}
}
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