Relative role of macrophytes, phytoplankton and sediments in the uptake and release of inorganic nitrogen in a small river

Nathalie Brion, Ana Cabrerizo Pastor, Loreto De Brabandere, Frank Dehairs, S. Van Belleghem, Patrick Meire, Jean-Pierre Vanderborght

Research output: Chapter in Book/Report/Conference proceedingMeeting abstract (Book)

Abstract

The objective of this study is to determine the extent and the major pathways of inorganic nutrients (with a focus on nitrogen) retention in a small eutrophic lowland river dominated by the growth of macrophytes. For this, we calculated for different seasons, daily nutrient fluxes (mainly N and P) through a 1.5 km section of a eutrophic macrophyte-dominated lowland river. Additionally, for each season, we measured the specific contribution of ammonium and nitrate uptake of macrophytes and phytoplankton using 15N tracers and we determined the net exchange fluxes between the water and the sediments using sediment core incubations. Finally, a mass balance integrating the incoming nutrient sources (upstream river, tributaries and groundwater inflow), the sediments, phytoplankton and macrophytes compartment was constructed.
Original languageEnglish
Title of host publicationInternational Symposium on Aquatic Vascular Plants: 25 Years After
Publication statusPublished - 2006
EventFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet - Stockholm, Sweden
Duration: 21 Sep 200925 Sep 2009

Conference

ConferenceFinds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet
CountrySweden
CityStockholm
Period21/09/0925/09/09

Keywords

  • macrophyte
  • river
  • sediments

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