Ecologische functies van oesterriffen in de Oosterschelde



Set VN link, Property name = Context, Property VN name = Context

Model link = Ecologische functies oesterriffen Oosterschelde

Result = Sedimentbalans en oesters in de Oosterschelde Oosterschelde VN

End Set VN link


Set VN link, Property name = Produces, Property VN name = Produces

Model link = Ecologische functies oesterriffen Oosterschelde

Result =

End Set VN link


Set VN link, Property name = Consumes, Property VN name = Consumes

Model link = Ecologische functies oesterriffen Oosterschelde

Result =

End Set VN link


Set VN link, Property name = Part of, Property VN name = Part of

Model link = Ecologische functies oesterriffen Oosterschelde

Result =

End Set VN link


Set VN link, Property name = Instance of, Property VN name = Instance of

Model link = Ecologische functies oesterriffen Oosterschelde

Result =

End Set VN link


Set VN link, Property name = Concerns, Property VN name = Concerns

Model link = Ecologische functies oesterriffen Oosterschelde

Result =

End Set VN link







Based on long term bathymetry research in the Eastern Scheldt delta transects with and without oyster reefs were compared (Figure 1). Based on height differences, the transects sedimentation and erosion rates were calculated and used to determine if there was a difference between transects without oyster reefs and transects crossing oyster reefs. The overall erosional trend of the Eastern Scheldt tidal flats became clear: the mean observed erosion was -0,012 meters per year. When considering the transects including oyster reefs a mean accumulation of sediment of +0,007 m per year was observed. The results of this research suggest that these ecosystem engineers, covering almost 10 km2 in the Eastern Scheldt, slow down the erosion of the tidal flats, as they act as sediment accumulators and stabilizers. An estimated volume between 70 000 m3 (comparison to a stable situation) and 190 000 m3 (comparison to the erosional tidal flats) of sediment is stabilized per year on tidal flats in the Eastern Scheldt due to the presence and effect of oyster reefs (Salvador de Paiva and De Vries, 2014).

Figure 1: Oyster reefs (Crassostrea gigas) stabilize eroding tidal flats under their footprint (Salvador de Paiva et al., 2014)
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Referenties



HZ University of Applied Sciences
Delta Academy
Rijkswaterstaat, Ministerie van Infrastructuur en Milieu
Projectbureau Zeeweringen
Waterschap Scheldestromen
Provincie Zeeland
Deltares