IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research

In:

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Diversity and vertical distribution of nematode assemblages: the Saguenay fjord (Quebec, Canada)
Tita, G.; Desrosiers, G.; Vincx, M.; Gagné, J.-P.; Locat, J. (2001). Diversity and vertical distribution of nematode assemblages: the Saguenay fjord (Quebec, Canada), in: (2001). VLIZ Coll. Rep. 31(2001). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 31: pp. chapter 60
In: (2001). VLIZ Coll. Rep. 31(2001). VLIZ Collected Reprints: Marine and Coastal Research in Flanders, 31. Flanders Marine Institute (VLIZ): Oostende, more
In: VLIZ Collected Reprints: Marine and Coastal Research in Flanders. Vlaams Instituut voor de Zee: Oostende. ISSN 1376-3822, more

Also published as
  • Tita, G.; Desrosiers, G.; Vincx, M.; Gagné, J.-P.; Locat, J. (2001). Diversity and vertical distribution of nematode assemblages: the Saguenay fjord (Quebec, Canada). Cah. Biol. Mar. 42(3): 263-274, more

Available in Authors 
    VLIZ: Open Repository 99971 [ OMA ]

Keywords
    Check lists; Meiobenthos; Size; Species diversity; Vertical distribution; Nematoda [WoRMS]; ANW, Canada, Quebec, Saguenay Fjord [Marine Regions]; Marine
Author keywords
    meiobenthos; nematodes; diversity; vertical distribution; size spectra; Saguenay fjord

Authors  Top 
  • Tita, G.
  • Desrosiers, G.
  • Vincx, M., more
  • Gagné, J.-P.
  • Locat, J.

Abstract
    Three stations were sampled for a meiofaunal survey in the Saguenay fjord's inner basin (Quebec, Canada). Nematodes were the dominant taxon accounting for 90 % of total individuals. Twenty nematode families and 55 genera were found. Cluster analysis showed two different depth- segregated nematode assemblages, one in the surface layer (0-2 cm) and the other in the subsurface layer (2- 10 cm) of the sediment column. A comparison between abundance and biomass vertical distributions showed that smaller individuals were dominant in the surface sediment layer, while larger individuals dominated in subsurface sediment. Selective deposit-feeders were the most abundant feeding group, while epigrowth-feeders were dominant in terms of biomass. Diversity tended to decrease in downstream areas of the fjord. Species composition and size spectra at the three stations suggest the succession of different meiofaunal communities along the fjord. Abundance-biomass comparison (ABC) plots suggested that upstream areas were moderately disturbed. The difference between Shannon's index in terms of abundance and biomass (H'delta = H'abund - H'biom) is suggested to be a useful tool in detecting environmental disturbance.

 Top | Authors