| Title | Microplastic Shape, Polymer Type, and Concentration Affect Soil Properties and Plant Biomass |
| Publication Type | Journal Article |
| Year of Publication | 2021 |
| Authors | Lozano Y.M, Lehnert T., Linck L.T, Lehmann A., Rillig M.C |
| Journal | Frontiers in Plant Science |
| Volume | 12 |
| Pagination | 14 |
| Date Published | Feb |
| Type of Article | Article |
| ISBN Number | 1664-462X |
| Accession Number | WOS:000623602900001 |
| Keywords | Aggregates, Daucus carota, MicroResp, Plant Sciences, porosity, Soil water status, water-stable |
| Abstract | Microplastics may enter the soil in a wide range of shapes and polymers. However, little is known about the effects that microplastics of different shapes, polymers, and concentration may have on soil properties and plant performance. To address this, we selected 12 microplastics representing different shapes (fibers, films, foams, and fragments) and polymers, and mixed them each with soil at a concentration of 0.1, 0.2, 0.3, and 0.4%. A phytometer (Daucus carota) grew in each pot during 4 weeks. Shoot, root mass, soil aggregation, and microbial activity were measured. All shapes increased plant biomass. Shoot mass increased by similar to 27% with fibers, similar to 60% with films, similar to 45% with foams, and by similar to 54% with fragments, as fibers hold water in the soil for longer, films decrease soil bulk density, and foams and fragments can increase soil aeration and macroporosity, which overall promote plant performance. By contrast, all shapes decreased soil aggregation by similar to 25% as microplastics may introduce fracture points into aggregates and due to potential negative effects on soil biota. The latter may also explain the decrease in microbial activity with, for example, polyethylene films. Our findings show that shape, polymer type, and concentration are key properties when studying microplastic effects on terrestrial systems.
|
| Short Title | Front. Plant Sci.Front. Plant Sci. |
| Alternate Journal | Front. Plant Sci. |
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Lozano, Yudi M. Lehnert, Timon Linck, Lydia T. Lehmann, Anika Rillig, Matthias C.
German Federal Ministry of Education and Research (BMBF)Federal Ministry of Education & Research (BMBF) [01LC1501A]; ERCEuropean Research Council (ERC)European Commission [694368]
This work was funded by the German Federal Ministry of Education and Research (BMBF) within the collaborative Project "Bridging in Biodiversity Science (BIBS-phase 2)" (funding number 01LC1501A). MR additionally acknowledges funding through an ERC Advanced Grant (694368).
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Lozano, YM (corresponding author), Free Univ Berlin, Inst Biol, Plant Ecol, Berlin, Germany.; Lozano, YM (corresponding author), Berlin Brandenburg Inst Adv Biodivers Res, Berlin, Germany.
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