Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Enhanced erodibility of fine-grained marine sediments by Hydrobia ulvae
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer
|  |
| Trefwoorden |
Bioerosion
Cohesive sediment
Erosion rate
Mudflats
Properties > Soil properties > Physical properties > Soil physical properties > Soil properties > Erodibility
Sedimentation
Hydrobia ulvae (Pennant, 1777) [WoRMS]; Hydrobia ulvae (Pennant, 1777) [WoRMS]
Marien/Kust |
| Author keywords |
erodibility; cohesive sediment; Hydrobia ulvae; faecal pellet; erosionthreshold; erosion rate; mudflat |
| Auteurs | | Top |
- Andersen, T.J., correspondent
- Jensen, K.T.
- Lund-Hansen, L.
|
- Mouritsen, K.N.
- Pejrup, M.
|
|
| Abstract |
The common mud snail Hydrobia ulvae is a widespread and dominant deposit feeder on fine-grained substrata along the European Atlantic coastline. Previous studies have shown that mud snail activities such as grazing, faecal pellet production and mucous production may influence physical properties of the surface sediment layer and thus depositional and erosional processes. To quantify the influence of Hydrobia density on key parameters such as erosion threshold and erosion rate, a short-term laboratory experiment was conducted. Snails were placed on fine-grained sediment at densities of 10000 and 50000 ind m-2 and erosion experiments were carried out one, three and five days after establishment of the sediment beds. Controls without H. ulvae were treated the same way. The presence of H. ulvae significantly increased the erosion rate and decreased the erosion threshold compared to snail-free control plots. The erosion rate was increased by a factor of 2 to 4 when H. ulvae were present and showed stronger influence by the snail than the erosion threshold. Snail density did not affect the erosion threshold, but the erosion rate doubled with an increase in density from 10000 to 50000 ind m-2. The erosion rate was only marginally different after one day but the difference increased over time and the erosion rate was significantly different for all treatments after five days. No significant time dependence was observed for the erosion threshold. The results generally confirm results obtained in situ and differences can be related to different hydrodynamic conditions under field and laboratory conditions. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
