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Seasonal variations in composition and production of planctonic communities in the lower River Rhine
Admiraal, W.; Breebaart, L.; Tubbing, G.M.J.; van Zanten, B.O.; de Ruijter van Stevenick, E.D.; Bijkerk, R. (1994). Seasonal variations in composition and production of planctonic communities in the lower River Rhine. Freshwat. Biol. 32: 519-531
In: Freshwater Biology. Blackwell: Oxford. ISSN 0046-5070; e-ISSN 1365-2427
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Aquatic communities > Plankton > Nannoplankton
    Aquatic communities > Plankton > Phytoplankton
    Aquatic communities > Plankton > Zooplankton
    Biological production
    Composition > Community composition
    Environments > Aquatic environment > Inland water environment > Lotic environment
    Surveys > Biological surveys > Plankton surveys
    Temporal variations > Periodic variations > Seasonal variations
    Zoet water
Auteurs  Top 
  • Admiraal, W.
  • Breebaart, L.
  • Tubbing, G.M.J.
  • van Zanten, B.O.
  • de Ruijter van Stevenick, E.D.
  • Bijkerk, R.
Abstract
    The composition and activity of phytoplankton, zooplankton and bacterioplankton in the lower River Rhine were measured in 1990 as part of an international biological inventory of the river. Phytoplankton blooms, dominated by a few species of centric diatoms, declined one order of magnitude during downstream transport. During non-bloom conditions algal densities were maintained during transport, or increased slightly, indicating the suitability of the river reach for algal growth. Bacterial cell number and production showed a broad summer maximum with activity peaks coincident with declining phytoplankton blooms. Winter values of bacterial production were substantial, probably as a result of allochthonous input of organic matter. Rotifers and crustaceans made up the greater part of the zooplankton biovolume, but at the upstream station the contribution of Dreissena larvae and rhizopods was also substantial.
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