La faune du sol tropicale, un facteur de régulation des communautés bactériennes liées aux émissions de gaz à effet de serre

Is soil fauna an important driver of the structure and activities of denitrifier communities in tropical soils?

International audience

Shifts in size, genetic structure and activity of the soil denitrifier community by nematode grazing

International audience; Bacterial-feeding nematodes represent an important driver of the soil microbial activity and diversity. This study aimed at characterizing the impact of nematode grazing on a model functional bacterial guild involved in N-cycling, the denitrifiers. Bacterial-feeding nematodes (Cephalobus pseudoparvus) were inoculated into soil microcosms whose indigenous nematofauna had previously been removed. The size, genetic structure and activity of the soil denitrifier community were characterized 15 and 45 days after nematodes inoculation using quantitative PCR of the nirK, nirS and nosZ denitrification genes, fingerprinting of the nirK and nirS genes and denitrification enzym…