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Biogenic reefs affect multiple components of intertidal soft-bottom benthic assemblages: the Lanice conchilega case study
De Smet, B.; D'Hondt, A.-S.; Verhelst, P.; Fournier, J.; Godet, L.; Desroy, N.; Rabaut, M.; Vincx, M.; Vanaverbeke, J. (2015). Biogenic reefs affect multiple components of intertidal soft-bottom benthic assemblages: the Lanice conchilega case study. Est., Coast. and Shelf Sci. 152: 44–55. http://dx.doi.org/10.1016/j.ecss.2014.11.002
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015
Peer reviewed article  
Available in  Authors 
Keywords
    Aquatic communities > Benthos
    Composition > Community composition
    Topographic features > Landforms > Coastal landforms > Beaches
    Topographic features > Landforms > Coastal landforms > Tidal flats
    Lanice conchilega (Pallas, 1766) [WoRMS]
    Marine/Coastal
Author keywords
    Biogenic reefs
Authors  Top 
  • De Smet, B.
  • D'Hondt, A.-S.
  • Verhelst, P.
  • Fournier, J.
  • Godet, L.
  • Desroy, N.
Abstract
    Biogenic reefs composed of the tube-building polychaete Lanice conchilega are important from a conservation point of view because they noticeably increase the biodiversity in otherwise species poor environments. However, up to now, little or no attention has been paid to the intertidal epi- and hyperbenthic communities associated with the reefs. Therefore, this is the first study which focuses on the effect of L. conchilega reefs on the entire bentho-pelagic community at two different locations. Environmental variables were measured and macro-, epi- and hyperbenthic communities were sampled within a L. conchilega reef and a control area at two locations in France: the bay of the Mont Saint-Michel (BMSM) and Boulogne-sur-Mer (Boulogne). The effect of the reef presence on the benthic community was studied with a 3-factor (Reef, Location and Period) Permanova. In addition, the relationship between the benthic community and the environmental variables was investigated using Distance-based linear models (DistLM). Most collected organisms were sampled in the reef area (macrobenthos: 91%, epibenthos: 81% and hyperbenthos: 78.5%) indicating that, independent of the location, the L. conchilega reefs positively affect all three associated benthic communities. However, the extent of the effect seems to be most pronounced for the macrobenthos and less distinct in case of the hyperbenthos. The macro-, and epibenthos are mainly structured by biotic variables (L. conchilega density and macrobenthic food availability respectively), while the hyperbenthos is rather structured by environmental variables. In general, L. conchilega reefs do not only affect abundances and diversity but they substantially steer the structure of the intertidal benthic sandy beach ecosystem.
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