Pommier T. auteur aut IRD Merroune A. auteur aut IRD Bettarel Yvan auteur aut IRD Got P. auteur aut IRD Janeau Jean-Louis auteur aut IRD Jouquet Pascal auteur aut IRD Thyu D. Thu auteur aut IRD Tran D. Toan auteur aut IRD Rochelle Newall Emma auteur aut IRD text journalArticle eng text/pdf born digital access While considered as sustainable and low-cost agricultural amendments, the impacts of organic fertilizers on downstream aquatic microbial communities remain poorly documented. We investigated the quantity and quality of the dissolved organic matter leaching from agricultural soil amended with compost, vermicompost or biochar and assessed their effects on lake microbial communities, in terms of viral and bacterial abundances, community structure and metabolic potential. The addition of compost and vermicompost significantly increased the amount of dissolved organic carbon in the leachate compared with soil alone. Leachates from these additions, either with or without biochar, were highly bioavailable to aquatic microbial communities, although reducing the metabolic potential of the community and harbouring more specific communities. Although not affecting bacterial richness or taxonomic distributions, the specific addition of biochar affected the original lake bacterial communities, resulting in a strongly different community. This could be partly explained by viral burst and converging bacterial abundances throughout the samples. These results underline the necessity to include off-site impacts of agricultural amendments when considering their cascading effect on downstream aquatic ecosystems. SOL CULTIVE COMPOST CONSEQUENCE ECOLOGIQUE EROSION HYDRIQUE LESSIVAGE MATIERE ORGANIQUE DISSOUTE CARBONE ORGANIQUE LAC MICROORGANISME VIRUS BACTERIE ABONDANCE DIVERSITE SPECIFIQUE STRUCTURE DE POPULATION METABOLISME VERMICOMPOST BIOCHAR ZONE TROPICALE VIET NAM 068PEDAPP 032MILPHY 90 3 622-632 2014 0168-6496 https://www.documentation.ird.fr/hor/fdi:010063307 10.1111/1574-6941.12421 0168-6496 [F B010063307] https://www.documentation.ird.fr/hor/fdi:010063307 https://www.documentation.ird.fr/intranet/publi/depot/2015-01-21/010063307.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-01-21 2022-04-19 fdi:010063307 fre