Open WL Archief (OWA)

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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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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, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 152717 [ aanvragen ]

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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

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Admiraal, W. Breebaart, L. Tubbing, G.M.J.	van Zanten, B.O. de Ruijter van Stevenick, E.D. Bijkerk, R., meer

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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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