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Hydrobiologia

, Volume 775, Issue 1, pp 51–67 | Cite as

An ecological model for the Scheldt estuary and tidal rivers ecosystem: spatial and temporal variability of plankton

  • J. NaithaniEmail author
  • B. de Brye
  • E. Buyze
  • W. Vyverman
  • V. Legat
  • E. Deleersnijder
Primary Research Paper

Abstract

This paper presents the formulation, structure, and governing equations of an ecosystem model developed for the Scheldt estuary and the tidal river network. The model has twelve state variables: nitrate, ammonium, phosphate, dissolved silica, freshwater and marine phytoplankton (chlorophytes and diatoms), freshwater zooplankton (ciliates, rotifers, and copepods), and benthic detritus. The ecological model is coupled to the 1-D tidal resolving version of the Second-generation Louvain-la-neuve ice-ocean Model (SLIM) (http://www.climate.be/SLIM). The model successfully simulates the observed longitudinal and seasonal variation of plankton in the Scheldt estuary. The phytoplankton production in the estuary is governed by temperature, underwater available light, turbidity, nutrients, and discharge. Of all these factors, discharge seems to be dominant. High discharge increases the turbidity in the water column and thus reduces the underwater light, while low discharge means decreased nutrients. The marine phytoplankton species were present as far to the upstream limits of the brackish waters, with diatoms dominating in the spring and chlorophytes in early summer. The freshwater phytoplankton are seen from late spring to summer. Freshwater zooplankton followed the evolution of freshwater phytoplankton.

Keywords

Ecological model SLIM Scheldt estuary Tidal river Chlorophytes Diatoms Ciliates Rotifers Copepods 

Notes

Acknowledgments

The author Jaya Naithani is grateful to Dr Klaas Deneudt for all the help provided in locating the data. Thanks are also due to the two reviewers for their careful, critical, and constructive comments. This research was conducted in the framework of the Interuniversity Attraction Pole TIMOTHY (IAP VI. 13), funded by Belgian Science Policy (BELSPO), and the project “Taking up the challenge of multi-scale marine modelling”, which is funded by the Communauté Fran?aise de Belgique under contract ARC10/15-028 (Actions de recherche concertées) with the aim of developing and applying SLIM. Computational resources were provided by the supercomputing facilities of the Université catholique de Louvain (CISM/UCL) and the Consortium des Equipment de Calcul Intensif en Féderation Wallonie Bruxelles (CECI) funded by the Fond de la Recherche Scientifique de Belgique (FRS-FNRS).

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • J. Naithani
    • 1
    Email author
  • B. de Brye
    • 1
  • E. Buyze
    • 2
  • W. Vyverman
    • 2
  • V. Legat
    • 1
  • E. Deleersnijder
    • 3
    • 4
  1. 1.Institute of Mechanics, Materials and Civil Engineering (IMMC)Université catholique de LouvainLouvain-la-NeuveBelgium
  2. 2.Section Protistology and Aquatic Ecology, Department of BiologyUniversity of GhentGhentBelgium
  3. 3.Institute of Mechanics, Materials and Civil Engineering (IMMC) & Earth and Life Institute (ELI)Université catholique de LouvainLouvain-la-NeuveBelgium
  4. 4.Delft Institute of Applied Mathematics (DIAM)Delft University of TechnologyDelftThe Netherlands

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