IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Carbon and nitrogen cycling in intertidal sediments near Doel, Scheldt Estuary
Middelburg, J.J.; Klaver, G.; Nieuwenhuize, J.; Vlug, T. (1995). Carbon and nitrogen cycling in intertidal sediments near Doel, Scheldt Estuary, in: Heip, C.H.R. et al. (Ed.) Major biological processes in European tidal estuaries. Developments in Hydrobiology, 110: pp. 57-69
In: Heip, C.H.R.; Herman, P.M.J. (Ed.) (1995). Major biological processes in European tidal estuaries. Reprinted from Hydrobiologia, vol. 311(1-3). Developments in Hydrobiology, 110. Kluwer Academic: Dordrecht, The Netherlands. ISBN 0-7923-3699-2. VII, 266 pp., more
In: Dumont, H.J. (Ed.) Developments in Hydrobiology. Kluwer Academic/Springer: The Hague; London; Boston; Dordrecht. ISSN 0167-8418, more

Also published as
  • Middelburg, J.J.; Klaver, G.; Nieuwenhuize, J.; Vlug, T. (1995). Carbon and nitrogen cycling in intertidal sediments near Doel, Scheldt Estuary. Hydrobiologia 311(1-3): 57-69, more

Available in Authors | Dataset 
    VLIZ: Open Repository 141150 [ OMA ]

Keywords
    Biogeochemical cycle; Carbon cycle; Carbon dioxide; Estuaries; Estuarine chemistry; Intertidal environment; Methane; Mineralization; Mud flats; Nitrogen cycle; Nitrous oxide; Organic carbon; Sediment chemistry; Belgium, Zeeschelde, Doel [Marine Regions]; Marine; Brackish water

Authors  Top | Dataset 
  • Middelburg, J.J., more
  • Klaver, G.
  • Nieuwenhuize, J.
  • Vlug, T.

Abstract
    Carbon and nitrogen cycling in intertidal mud flat sediments in the Scheldt Estuary was studied using measurements of carbon dioxide, methane and nitrous oxide emission rates and pore-water profiles of SgrCO2, ammonium and nitrate. A comparison between chamber measured carbon dioxide fluxes and those based on SgrCO2 pore-water gradients using Fick's First law indicates that apparent diffusion coefficients are 2 to 28 times higher than bulk sediment diffusion coefficients based on molecular diffusion. Seasonal changes in gaseous carbon fluxes or SgrCO2 pore water concentrations cannot be used directly, or in a simple way, to determine seasonal rates of mineralization, because of marked seasonal changes in pore-water storage and exchange parameters.
    The annual amount of carbon delivered to the sediment is 42 mol m–2, of which about 42% becomes buried, the remaining being emitted as methane (7%) or carbon dioxide (50%). Each year about 2.6 mol N m–2 of particulate nitrogen reaches the sediment; 1.1 mol m–2 is buried and 1.6 mol m–2 is mineralized to ammonium. Only 0.42 mol m–2 yr–1 of the ammonium produced escapes from the sediments, the remaining being first nitrified (1.2 mol m–2 yr–1) and then denitrified (1.7 mol m–2 yr–1). Simple calculations indicate that intertidal sediments may account for about 14% and 30% of the total estuarine retention of nitrogen and carbon, respectively.

Dataset
  • Data set on pore-water composition and sediment-air fluxes in the Scheldt estuary at 9 stations with seasonal resolution. Intertidal sediments, more

All data in IMIS is subject to the VLIZ privacy policy Top | Authors | Dataset