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The temporal variation of intertidal nematodes in the Westerschelde. I. The importance of an estuarine gradient
Li, J.; Vincx, M. (1993). The temporal variation of intertidal nematodes in the Westerschelde. I. The importance of an estuarine gradient. Neth. J. Aquat. Ecol. 27(2-4): 319-326. https://dx.doi.org/10.1007/BF02334795
In: Netherlands Journal of Aquatic Ecology. Kluwer Academic Publishers/Netherlands Society of Aquatic Ecology: Bilthoven. ISSN 1380-8427; e-ISSN 2214-7098, meer
Ook verschenen in:
Meire, P.; Vincx, M. (Ed.) (1993). Marine and estuarine gradients: ECSA 21: Proceedings of the 21st symposium of the Estuarine and Coastal Sciences Association held in Gent, 9-14 september 1991. Netherlands Journal of Aquatic Ecology, 27(2-4). Netherlands Society of Aquatic Ecology: Bilthoven. 496 pp., meer
Peer reviewed article  
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Trefwoorden
    Marien/Kust; Brak water
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  • Li, J.
  • Vincx, M., meer
Abstract
    Biannual meiobenthic sampling (Spring and Autumn) was carried out in 1983-1989 at two fine sandy intertidal stations in the Westerschelde estuary. Both stations are exposed daily for more than one hour and are situated in the polyhaline and the mesohaline zone of the estuary. Average density data of non-selective deposit-feeders > predators > epigrowth-feeders > selective deposit-feeders for both stations are presented in spite of different nematode species composition. No difference between Spring and Autumn nor trend over 7 years could be detected. Higher total nematode densities are found at the polyhaline station (average 3200 ind. 10 cm-2) in comparison with the mesohaline station (average 2300 ind. 10 cm-2), a difference mainly due to higher non-selective deposit-feeders and predators densities in the polyhaline station. Each year, heterogeneous variance is found for all feeding types at the mesohaline station, but only for epigrowth-feeders and predators at the polyhaline station. The higher nematode density at the polyhaline station is probably caused by the more stable nematode structure. An unstable nematode temporal pattern at the mesohaline station is suggested to be combined with the detritus food chain system in the mesohaline zone. The unstable estuarine habitats are mainly caused by their upstream effects: the River Schelde, which clearly influences the stability of the nematode communities.
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