Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge

Abstract Wastewater treatment plants produce hundreds of million tons of sewage sludge every year all over the world. Vermicomposting is well established worldwide and has been successful at processing sewage sludge, which can contribute to alleviate the severe environmental problems caused by its d...

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Autores principales:	Jorge Domínguez, Manuel Aira, Keith A. Crandall, Marcos Pérez-Losada
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8f110db8fde94769943fe7ab436f7417
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spelling	oai:doaj.org-article:8f110db8fde94769943fe7ab436f74172021-12-02T16:13:46ZEarthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge10.1038/s41598-021-95099-z2045-2322https://doaj.org/article/8f110db8fde94769943fe7ab436f74172021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95099-zhttps://doaj.org/toc/2045-2322Abstract Wastewater treatment plants produce hundreds of million tons of sewage sludge every year all over the world. Vermicomposting is well established worldwide and has been successful at processing sewage sludge, which can contribute to alleviate the severe environmental problems caused by its disposal. Here, we utilized 16S and ITS rRNA high-throughput sequencing to characterize bacterial and fungal community composition and structure during the gut- and cast-associated processes (GAP and CAP, respectively) of vermicomposting of sewage sludge. Bacterial and fungal communities of earthworm casts were mainly composed of microbial taxa not found in the sewage sludge; thus most of the bacterial (96%) and fungal (91%) taxa in the sewage sludge were eliminated during vermicomposting, mainly through the GAP. Upon completion of GAP and during CAP, modified microbial communities undergo a succession process leading to more diverse microbiotas than those found in sewage sludge. Consequently, bacterial and fungal community composition changed significantly during vermicomposting. Vermicomposting of sewage resulted in a stable and rich microbial community with potential biostimulant properties that may aid plant growth. Our results support the use of vermicompost derived from sewage sludge for sustainable agricultural practices, if heavy metals or other pollutants are under legislation limits or adequately treated.Jorge DomínguezManuel AiraKeith A. CrandallMarcos Pérez-LosadaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jorge Domínguez Manuel Aira Keith A. Crandall Marcos Pérez-Losada Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge
description	Abstract Wastewater treatment plants produce hundreds of million tons of sewage sludge every year all over the world. Vermicomposting is well established worldwide and has been successful at processing sewage sludge, which can contribute to alleviate the severe environmental problems caused by its disposal. Here, we utilized 16S and ITS rRNA high-throughput sequencing to characterize bacterial and fungal community composition and structure during the gut- and cast-associated processes (GAP and CAP, respectively) of vermicomposting of sewage sludge. Bacterial and fungal communities of earthworm casts were mainly composed of microbial taxa not found in the sewage sludge; thus most of the bacterial (96%) and fungal (91%) taxa in the sewage sludge were eliminated during vermicomposting, mainly through the GAP. Upon completion of GAP and during CAP, modified microbial communities undergo a succession process leading to more diverse microbiotas than those found in sewage sludge. Consequently, bacterial and fungal community composition changed significantly during vermicomposting. Vermicomposting of sewage resulted in a stable and rich microbial community with potential biostimulant properties that may aid plant growth. Our results support the use of vermicompost derived from sewage sludge for sustainable agricultural practices, if heavy metals or other pollutants are under legislation limits or adequately treated.
format	article
author	Jorge Domínguez Manuel Aira Keith A. Crandall Marcos Pérez-Losada
author_facet	Jorge Domínguez Manuel Aira Keith A. Crandall Marcos Pérez-Losada
author_sort	Jorge Domínguez
title	Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge
title_short	Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge
title_full	Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge
title_fullStr	Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge
title_full_unstemmed	Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge
title_sort	earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8f110db8fde94769943fe7ab436f7417
work_keys_str_mv	AT jorgedominguez earthwormsdrasticallychangefungalandbacterialcommunitiesduringvermicompostingofsewagesludge AT manuelaira earthwormsdrasticallychangefungalandbacterialcommunitiesduringvermicompostingofsewagesludge AT keithacrandall earthwormsdrasticallychangefungalandbacterialcommunitiesduringvermicompostingofsewagesludge AT marcosperezlosada earthwormsdrasticallychangefungalandbacterialcommunitiesduringvermicompostingofsewagesludge
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Earthworms drastically change fungal and bacterial communities during vermicomposting of sewage sludge

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