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Contrasting dynamics of ciliate communities in sandy and silty sediments of an estuarine intertidal flat Hamels, I.; Muylaert, K.; Sabbe, K.; Vyverman, W. (2005). Contrasting dynamics of ciliate communities in sandy and silty sediments of an estuarine intertidal flat. Eur. J. Protistol. 41(4): 241-250. https://dx.doi.org/10.1016/j.ejop.2005.02.002 In: European Journal of Protistology. Elsevier: Jena. ISSN 0932-4739; e-ISSN 1618-0429 Is gerelateerd aan: Hamels, I.; Muylaert, K.; Sabbe, K.; Vyverman, W. (2003). Contrasting dynamics of ciliate communities in sandy and silty sediments of an estuarine intertidal flat, in: Hamels, I. Protozoan communities in intertidal estuarine sediments, their dynamics and trophic interactions = Protozoa in intertidale estuariene sedimenten, hun dynamiek en trofische interacties. pp. 31-57, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 274058 [ aanvragen ]

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Trefwoorden

Abundance Animal appendages > Cilia Aquatic communities > Benthos Distribution > Geographical distribution > Vertical distribution Physics > Mechanics > Dynamics Sediments Sediments > Clastics > Sand Sediments > Clastics > Silt Topographic features > Landforms > Coastal landforms > Tidal flats Ciliophora [WoRMS] ANE, Nederland, Westerschelde [Marine Regions]; ANE, Nederland, Westerschelde, Molenplaat [Marine Regions] Marien/Kust; Brak water; Zoet water

Author keywords

Ciliates; Tidal flat; Schelde estuary; Abundance; Species richness; Sediment characteristics

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Auteurs		Top
Hamels, I. Muylaert, K. Sabbe, K. Vyverman, W.

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Abstract

During a 1-year study of the ciliate faunas of a silty and a sandy site on an intertidal flat in the Westerschelde estuary, a total number of 107 taxa were recorded belonging to at least 52 genera and 15 orders. Our results suggest that physical properties of the sediment were more important in regulating ciliate abundance, diversity and community composition than food availability, predation, temperature or oxygen concentration. Ciliate abundance and diversity were positively related to sediment grain size and the ciliate community of silty sediments was found to be a subset of that of sandy sediments. At the sandy site, where the sediment composition was stable, seasonal changes in the ciliate community were related to changes in food availability and/or temperature. At both the sandy and silty sites, a clear vertical gradient in the ciliate community was observed that appeared to be linked to gradients in food availability and oxygen concentration. These vertical gradients in ciliate community composition, however, were less steep than the measured oxygen gradients, probably due to the presence of oxic microniches in the anoxic zone.

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