Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 559224
Title Horizontal gene transfer and shifts in linked bacterial community composition are associated with maintenance of antibiotic resistance genes during food waste composting
Author(s) Liao, Hanpeng; Friman, Ville Petri; Geisen, Stefan; Zhao, Qian; Cui, Peng; Lu, Xiaomei; Chen, Zhi; Yu, Zhen; Zhou, Shungui
Source Science of the Total Environment 660 (2019). - ISSN 0048-9697 - p. 841 - 850.
DOI https://doi.org/10.1016/j.scitotenv.2018.12.353
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Antibiotic resistance genes - Bacterial community composition - Composting physicochemical parameters - Mobile genetic elements - Municipal solid waste
Abstract

About 1.3 billion tons of food waste (FW) is annually produced at a global scale. A major fraction of FW is deposited into landfills thereby contributing to environmental pollution and emission of greenhouse gasses. While increasing amounts of FW are recycled more sustainably into fertilizers in industrial-scale composting, very little is known about the antibiotic resistance genes (ARGs) present in FW and how their abundance is affected by composting. To study this, we quantified the diversity and abundance of ARGs, mobile genetic elements (MGEs) and bacterial communities in the beginning, during and at the end of the FW composting. All targeted 27 ARGs and 5 MGEs were detected in every sample suggesting that composted FW remains a reservoir of ARGs and MGEs. While the composting drastically changed the abundance, composition and diversity of bacterial communities, an increase in total ARG and MGE abundances was observed. Changes in ARGs were linked with shifts in the composition of bacterial communities as revealed by a Procrustes analysis (P < 0.01). Crucially, even though the high composting temperatures reduced the abundance and diversity of initially ARG-associated bacterial taxa, ARG abundances were maintained in other associated bacterial taxa. This was likely driven by horizontal gene transfer and physicochemical composting properties as revealed by a clear positive correlation between ARGs, MGEs, pH, NO 3 and moisture. Together our findings suggest that traditional composting is not efficient at removing ARGs and MGEs from FW. More effective composting strategies are thus needed to minimize ARG release from composted FW into agricultural environments.

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