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Intertidal meiofauna of the St Lawrence estuary (Quebec, Canada): diversity, biomass and feeding structure of nematode assemblages Tita, G.; Desrosiers, G.; Vincx, M.; Clément, M. (2002). Intertidal meiofauna of the St Lawrence estuary (Quebec, Canada): diversity, biomass and feeding structure of nematode assemblages. J. Mar. Biol. Ass. U.K. 82(5): 779-791. dx.doi.org/10.1017/S0025315402006148 In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 276470 [ download pdf ]

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Trefwoorden

Aquatic communities > Benthos > Meiobenthos Aquatic organisms > Marine organisms Behaviour > Feeding behaviour Characteristics > Diversity Ecological zonation Population characteristics > Biomass Water bodies > Coastal waters > Coastal landforms > Coastal inlets > Estuaries Nematoda [WoRMS] ANW, Canada, Quebec, St. Lawrence Estuary [Marine Regions]; Canada [Marine Regions] Marien/Kust

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Auteurs		Top
Tita, G. Desrosiers, G. Vincx, M. Clément, M.

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Abstract

The meiofauna of the St Lawrence estuary was investigated in the intertidal zone of the Parc du Bic (Quebec, Canada). Five nematode assemblages were distinguished by a cluster analysis: A1 and A2 (upper-tide level); A3 (mid-tide level); A4 and A5 (low-tide level). Discriminant function analysis showed that exposure time during low tide was the most important environmental factor in determining differences between assemblages. Chlorophyll-a, phaeopigments, sediment water content, and per cent of silt followed in the same order. Nematode densities (400–1500 ind 10 cm-2) were found to be lower than those generally reported for other estuarine intertidal zones of the eastern Atlantic coast. Mean nematode biomass in the five assemblages ranged between 96±14 and 248±86 µg Corg 10 cm-2. Deposit feeders were generally the dominant nematode feeding group in terms of abundance and biomass. Correlation of epigrowth-feeders with chlorophyll-a and phaeopigments, respectively, suggested that in the upper-tide level, old or partially degraded phytodetritus contribute more to the diet of this nematode feeding group; and in the low-tide level epigrowth-feeders may rely more on ‘fresher’ phytodetritus.

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