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 410495
Title Effects of aquatic vegetation type on denitrification
Author(s) Veraart, A.J.; Bruijne, W.J.J. de; Peeters, E.T.H.M.; Klein, J.J.M. de; Scheffer, M.
Source Biogeochemistry 104 (2011)1-3. - ISSN 0168-2563 - p. 267 - 274.
Department(s) Aquatic Ecology and Water Quality Management
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) sloten - waterplanten - zoetwaterecologie - stikstof - aquatische ecologie - nitrificatie - ditches - aquatic plants - freshwater ecology - nitrogen - aquatic ecology - nitrification - fresh-water - submersed macrophytes - drainage ditches - nitrate removal - lemna-minor - sediment - plant - eutrophication - ecosystems
Categories Water Quality
Abstract In a microcosm 15N enrichment experiment we tested the effect of floating vegetation (Lemna sp.) and submerged vegetation (Elodea nuttallii) on denitrification rates, and compared it to systems without macrophytes. Oxygen concentration, and thus photosynthesis, plays an important role in regulating denitrification rates and therefore the experiments were performed under dark as well as under light conditions. Denitrification rates differed widely between treatments, ranging from 2.8 to 20.9 µmol N m-2 h-1, and were strongly affected by the type of macrophytes present. These differences may be explained by the effects of macrophytes on oxygen conditions. Highest denitrification rates were observed under a closed mat of floating macrophytes where oxygen concentrations were low. In the light, denitrification was inhibited by oxygen from photosynthesis by submerged macrophytes, and by benthic algae in the systems without macrophytes. However, in microcosms with floating vegetation there was no effect of light, as the closed mat of floating plants caused permanently dark conditions in the water column. Nitrate removal was dominated by plant uptake rather than denitrification, and did not differ between systems with submerged or floating plants
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