Trophic gradients in a large-river delta: Ecological structure determined by connectivity gradients in the Danube Delta (Romania)

H. Coops, L.L. Buijse-Bogdan, A.D. Buijse, A. Constantinescu, S. Covaliov, J. Hanganu, B.W. Ibelings, G. Menting, I. Navodaru, W. Oosterberg, M. Staras, L. Torok

Research output: Contribution to journalArticleAcademicpeer-review

27 Citations (Scopus)

Abstract

There are over 300 lakes interconnected by riverbranches and man-made canals in the Danube Delta (Romania). A multidisciplinary survey of these riverine lakes situated in large Wetland complexes was made comprising hydrological modelling, remote sensing and monitoring of water quality, plankton, aquatic vegetation and fish communities. Between-lake differences in water quality and aquatic vegetation cover were inferred from satellite image. Based on channel and lake dimensions, hydrological characteristics of the lakes in the delta were determined: hydrological distance from a riverbranch, residence time and impact of reed water. Water-quality and biotic parameters (phyto- and zooplankton, submerged plants and fish) were sampled in a comparative survey in June 1997-1999 in subsets of the lakes. In a follow-up study in 2001-2002, seasonality of aquatic vegetation and fish were recorded.
Original languageEnglish
Pages (from-to)698-709
JournalRiver Research and Applications
Volume24
Issue number5
DOIs
Publication statusPublished - 2008

Keywords

  • floodplain system
  • hydrological connectivity
  • organic-matter
  • shallow lakes
  • water
  • dynamics
  • perspective
  • phosphorus
  • management
  • chemistry

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