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.

Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.

Basisinformatie over ‘Open Access to scholarly information'.

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one publication added to basket [135670]
Water column anoxia: vertical zonation of planktonic protozoa Fenchel, T.; Kristensen, L.D.; Rasmussen, L. (1990). Water column anoxia: vertical zonation of planktonic protozoa. Mar. Ecol. Prog. Ser. 62: 1-10 In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 148855 [ download pdf ]

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Trefwoorden

Aquatic communities > Plankton > Zooplankton Biological production > Secondary production Chemical compounds > Organic compounds > Hydrocarbons > Saturated hydrocarbons > Acyclic hydrocarbons > Methane Distribution > Geographical distribution > Vertical distribution Environmental effects > Salinity effects Eutrophic waters Profiles > Vertical profiles > Oxygen profiles Sulphides Cyclidium O.F. Müller, 1773 [WoRMS]; Flagellates [WoRMS]; Pleuronema Dujardin, 1841 [WoRMS] ANE, Denmark [Marine Regions] Marien/Kust

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Auteurs		Top
Fenchel, T., meer Kristensen, L.D. Rasmussen, L.

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Abstract

The vertical zonation of planktonic protozoa was studied in 2 Danish eutrophic fjords at localities with an anoxic layer of bottom-water. Three distinct assemblages of protozoa are found. The fully oxygenated surface waters harbour a typical ciliate-plankton assemblage dominated by tintinnids and other oligotrichs in addition to various gymnostome ciliates. Heterotrophic flagellates totally dominate as bacterivores. In the oxycline a quite different group of ciliates occur; it is dominated by bacterivorous scuticociliates. Beneath the oxycline, in strictly anoxic and sulphide containing water, an assemblage of specialised anaerobic ciliates occurs. The high bacterial productivity in the oxycline is reflected by a biomass maximum of ciliates and to a lesser degree of heterotrophic flagellates. In anoxic microbial communities the biomass ratio between phagotrophs and their prey is much lower than in aerobic communities due to the low net growth efficiency of anaerobic eukaryotes.

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