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The Belgian sandy beach ecosystem: a review
Speybroeck, J.; Bonte, D.; Courtens, W.; Gheskiere, T.; Grootaert, P.; Maelfait, J.-P.; Provoost, S.; Sabbe, K.; Stienen, E.W.M.; Van Lancker, V.R.M.; Van Landuyt, W.; Vincx, M.; Degraer, S. (2007). The Belgian sandy beach ecosystem: a review, in: Speybroeck, J. Ecologie van macrobenthos als een basis voor een ecologische bijsturing van strandsuppleties = Ecology of macrobenthos as a baseline for an ecological adjustment of beach nourishment. pp. 22-44
In: Speybroeck, J. (2007). Ecologie van macrobenthos als een basis voor een ecologische bijsturing van strandsuppleties = Ecology of macrobenthos as a baseline for an ecological adjustment of beach nourishment. PhD Thesis. Universiteit Gent. Vakgroep Biologie, sectie Mariene Biologie: Gent. 189 pp.
Available in  Authors 
Keywords
    Aquatic communities > Benthos > Phytobenthos
    Aquatic communities > Benthos > Zoobenthos
    Ecosystems
    Ecosystems
    Fauna > Aquatic organisms > Aquatic animals > Aquatic birds
    Organisms > Eukaryotes > Animals > Invertebrates > Arthropods
    Phytobenthos
    Sandy beaches
    Soil types > Soil types (textural) > Sandy soils
    ANE, Belgium [Marine Regions]; Europe, Belgium [Marine Regions]
    Marine/Coastal
Authors  Top 
  • Speybroeck, J., more
  • Bonte, D.
  • Courtens, W.
  • Gheskiere, T.
  • Grootaert, P., more
  • Maelfait, J.-P.
  • Provoost, S., more
  • Sabbe, K., more
  • Stienen, E.W.M., more
  • Van Lancker, V.R.M.
  • Van Landuyt, W.
  • Vincx, M., more
  • Degraer, S., more
Abstract
    This paper provides a comprehensive overview of the available knowledge on sedimentology and hydrodynamics and five major ecosystem components - microphytobenthos, vascular plants, terrestrial arthropods, zoobenthos (macrobenthos, meiobenthos, hyperbenthos and epibenthos) and avifauna - of Belgian sandy beaches (from foredunes to foreshore). An ecosystem overview is presented for this specific geographically delimited shoreline, instead of dealing with a single component only. Belgian beaches are (ultra-)dissipative, macrotidal and wide beaches with a cross-shore average median grain size of 160-380 μm. Sediment becomes coarser, slopes steeper, tidal range smaller towards the east. Especially eastern beaches have been reshaped frequently through human action (e.g. beach nourishment). Belgian beaches are characterised by the presence of highly adapted organisms. It is demonstrated that even a highly recreational and heavily populated coastline like the Belgian coast provides valuable yet threatened habitats to several beach-dependent species, which may reach high numbers. Vascular plants of the drift line, dry beach and embryonic dunes are mostly short-lived and thalassochorous. Most common species are sea rocket (Cakile maritima), prickly saltwort (Salsola kali subsp. kali) and sea sandwort (Honckenya peploides). Terrestrial arthropods inhabiting the same general area are highly diverse, comprising halobiontic, halophilous and haloxene species. Prominent members of this fauna are sandhopper (Talitrus saltator) and dipterans (flies). Microphytobenthos is an important primary producer on Belgian beaches, mainly consisting of diatoms. Very little is known about this group of organisms. Belgian beaches also have a specific zoobenthic fauna in both meiofauna and macrofauna, e.g. the typical upper intertidal Scolelepis squamata-Eurydice pulchra community. Also epi- and hyperbenthic animals depend on the beach, e.g. as nursery grounds. Nowadays no nesting of birds occurs on the beach itself. Nevertheless, Belgian beaches are important for resting and foraging (e.g. sanderling Calidris alba). Little is know about biological interactions on Belgian beaches. Human actions associated with several aspects of recreation, beach management and fisheries, are endangering all the discussed biota, and are specified.
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