Do magnetic phosphorus adsorbents used for lake restoration impact on zooplankton community? Álvarez-Manzaneda Salcedo, María Inmaculada Guerrero, Francisco del Arco, Ana Funes, Ana Inmaculada Cruz Pizarro, Luis José Vicente Álvarez De Manzaneda, María Inmaculada De Magnetic particles Toxicity Zooplankton Lake restoration 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. Tempo ral 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 consid ered: 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 N 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 2023-01-24T07:59:13Z 2023-01-24T07:59:13Z 2018-11-28 info:eu-repo/semantics/article https://hdl.handle.net/10481/79283 https://doi.org/10.1016/j.scitotenv.2018.11.375 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional