IMIS | Vlaams Instituut voor de Zee

Vlaams Instituut voor de Zee

Platform voor marien onderzoek


Publicaties | Instituten | Personen | Datasets | Projecten | Kaarten
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

Nematode biomass spectra as descriptors of functional changes due to human and natural impact
Vanaverbeke, J.; Steyaert, M.; Vanreusel, A.; Vincx, M. (2003). Nematode biomass spectra as descriptors of functional changes due to human and natural impact. Mar. Ecol. Prog. Ser. 249: 157-170.
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer
Peer reviewed article  

Beschikbaar in  Auteurs | Datasets 

    Aquatic communities > Plankton > Phytoplankton
    Depletion > Oxygen depletion
    Ecosystem disturbance
    Population characteristics > Biomass
    Population characteristics > Population structure > Size distribution
    Nematoda [WoRMS]
    ANE, België [Marine Regions]
Author keywords
    nematodes; biomass; size spectra; physical disturbance; oxygen stress; phytoplankton sedimentation

Auteurs  Top | Datasets 

    Nematode biomass spectra (NBS) for different nematode communities—subject to different forms of stress and enrichment—from the Belgian continental shelf have been constructed and analysed. These analyses showed that non-normalised NBS yield better results for comparisons of nematode assemblages than normalised NBS (in which the biomass in a weight class is divided by its corresponding weight interval) since the ecologically relevant information is retained. Normalising the spectra caused elevated biomass values and peaks to disappear, introducing bias when interpreting the distribution of biomass over spectra. Cumulative nematode biomass spectra proved to be useful in evaluating statistical differences, using the slope of the regression line of the cumulative biomass to the nominal value of a log2-based size class. Interpreting Pareto-type graphs and regressions was not straightforward. We suggest a combined use of both NBS and the regression approach for the analysis of NBS. NBS and cumulative NBS constructed for nematode communities from undisturbed sediments proved to be conservative: no differences in size distribution were found for communities from different locations. Physical disturbance, introduced by sand extraction, did not affect the regression slopes of cumulative NBS. However, a shift in peak biomass values towards lower size classes was observed in the regular NBS. This was attributed to an alteration of the nematode communities due to the frequent physical disturbance of the sediments. At an oxygen-stressed site, we observed a single class biomass peak, due to the presence of a single nematode species well adapted to the impoverished sediment quality. Phytoplankton sedimentation during a spring bloom corresponded to shifts in peaks in NBS due to a change in age structure of the nematode communities. Biomass values probably increased as a result of a higher food supply to the benthos.

Datasets (4)
  • Length/Width and biomass of nematodes from sandbanks on the Belgian Continental Shelf, meer
  • Meiobenthos van subtidale zandbanken op het Belgisch Continentaal Plat, meer
  • PODOI: Nematode length/width measurements for two coastal stations in the Belgian Part of the North Sea., meer
  • SPEEK database: Meiobenthos of subtidal sandbanks on the Belgian Continental Shelf, meer

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs | Datasets