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one publication added to basket [207804]

The effect of the dominant polychaete Scolelepis squamata on nematode colonisation in sandy beach sediments: An experimental approach Maria, T.F.; Esteves, A.M.; Vanaverbeke, J.; Vanreusel, A. (2011). The effect of the dominant polychaete Scolelepis squamata on nematode colonisation in sandy beach sediments: An experimental approach. Est., Coast. and Shelf Sci. 94(3): 272-280. dx.doi.org/10.1016/j.ecss.2011.07.006 In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 226110 [ download pdf ]

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Trefwoorden

Colonisation Interactions Microcosms Nematoda [WoRMS]; Scolelepis squamata (Müller, 1806) [WoRMS]; Scolelepis squamata (Müller, 1806) [WoRMS] ANE, Noordzee [Marine Regions] Marien/Kust

Author keywords

biological interactions; colonisation; nematodes; Scolelepis squamata; microcosm experiment; North Sea

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Auteurs		Top
Maria, T.F. Esteves, A.M. Vanaverbeke, J. Vanreusel, A.

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Abstract

The effect of an abundant sandy beach polychaete, Scolelepis squamata, on the colonisation of defaunated sediments by marine nematodes indicates that sandy beach fauna can be partially controlled by biological interactions within and across size groups. Experimental cores, equipped with windows allowing infaunal colonisation, were filled with defaunated sandy beach sediment containing two different treatments with and without S. squamata. These cores were inserted into microcosms filled with sediment with indigenous meiofauna collected from the field. The treatments were incubated in the laboratory at ambient temperature and salinity for 2, 7, 14 and 21 days, in order to follow the colonisation process of the defaunated sediments by the indigenous nematode fauna over time. Nematodes initially colonised both treatments, with abundances of up to 10% of the densities in the control; after 2 weeks, nematode densities in the cores without S. squamata surpassed the control densities. Nematode assemblages in both treatments were not species rich, and also differed in composition from the natural assemblages. The most successful colonising species, Enoplolaimus litoralis, was rare in the surrounding sediment, suggesting that colonisation was determined by species-specific characteristics such as body size, motility and feeding strategy. Initially the presence of macrofauna did not affect the nematode community composition, but after 2 weeks of the experiment, the presence of the polychaete seemed to facilitate the earlier establishment of non-opportunistic species.

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