Over het archief
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'.
| one publication added to basket [58274] |
The occurrence of 'epipsammic' diatom populations: a result of interaction between physical sorting of sediment and certain properties of diatom species
De Jonge, V.N. (1985). The occurrence of 'epipsammic' diatom populations: a result of interaction between physical sorting of sediment and certain properties of diatom species. Est., Coast. and Shelf Sci. 21(5): 607-622. https://dx.doi.org/10.1016/0272-7714(85)90061-7
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer
Is gerelateerd aan:De Jonge, V.N. (1992). The occurrence of 'epipsammic' diatom populations: a result of interaction between physical sorting of sediment and certain properties of diatom species, in: De Jonge, V.N. Physical processes and dynamics of microphytobenthos in the Ems estuary (The Netherlands). pp. 113-126, meer
|  |
| Trefwoorden |
Algae > Diatoms
Aquatic communities > Benthos
Aquatic communities > Epipsammon
Sediments
Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries
Marien/Kust |
| Abstract |
The role of ‘sand’ (particles >55 μm) as a substratum for benthic diatoms was investigated, using sediments collected from tidal flats and main channels in the Ems estuary. On average, 13% of the sand grains were occupied by one or more diatom cells. It appeared that 80% of the diatom cells in this fraction were present in or on mud coating the sand grains. Of the sand grains in the water, 7% were occupied by diatom cells. The preference of benthic diatoms for the mud coatings rather than the bare parts of the sand grains stresses the importance of ‘mud’ (particles <55 μm) as a substratum for diatoms on the tidal flats. This was confirmed by separate cell counts for the mud and sand fractions.Of the sand grains with attached diatoms, the mean number of diatom cells per grain in the water was similar to that on the tidal flats. This indicates a large exchange of sand between tidal flats and channels. A similar exchange between tidal flats and possibly a shift in the species composition. These processes suggested by the striking similarities in cell number distribution and species composition in samples from these two habitats. However, on exposed tidal flats certain species were present in lower numbers than in the channels, indicating that loosely attached diatoms can be scoured off their substratum. Consequently, two factors are assumed to contribute to the dynamics of the species composition of benthic diatoms. The first is the adhesion capacity of diatoms and the second is sediment sorting by currents and waves. These factors cause a differential but significant flux of benthic diatoms to and from the channels, followed by changes over time in the diatom populations on the tidal flats and possibility a shift in the species composition. These processes show that the terms ‘epipelic’ and ‘epipsammic’ are not helpful to classify the main components of the diatom flora in this estuary. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
