Suleiman, MarcelMarcelSuleimanBrandt, Franziska BarbaraFranziska BarbaraBrandtBrenzinger, KristofKristofBrenzingerMartinson, GuntarsGuntarsMartinsonBraker, GescheGescheBraker2020-02-072020-02-072016-12-06Microbial Ecology 4 (73): 751-754 (2017-05-01)http://hdl.handle.net/11420/4785We studied the propensity of the tank bromeliad Werauhia gladioliflora to emit the greenhouse gas nitrous oxide (N2O) at current and at increased N deposition levels in the range of predicted future scenarios. Potential production rates and net accumulation of N2O from tank substrate corresponded to N availability. N2O was produced in excess at all N levels due to a low level of N2O reductase activity which agreed well with a low abundance of N2O reducers compared to nitrite reducers. Transcriptional activation, however, indicated that expression of denitrification genes may be enhanced with increasing N supply eventually leading to more efficient N2O turnover with potential for adaptation of denitrifier communities to higher N levels. Our findings indicate that tank bromeliads may constitute a novel source of N2O in Neotropical forest canopies but further studies are required to understand the size and significance of in situ N2O fluxes from tank bromeliads to the environment.en1432-184X20164751754SpringerBromeliadsDenitrificationDenitrifiersEmissionsNitrous oxideTechnikJournal Article10.1007/s00248-016-0903-9Other