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Does the Port 2000 harbour construction have an effect on the Seine estuary suprabenthic community?
Dauvin, J.-C.; Alizier, S.; Vallet, C.; Ruellet, T. (2010). Does the Port 2000 harbour construction have an effect on the Seine estuary suprabenthic community? Est., Coast. and Shelf Sci. 86(1): 42-50. https://dx.doi.org/10.1016/j.ecss.2009.10.005
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer
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| Trefwoord |
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| Author keywords |
suprabenthos; assemblage dynamics; Le Havre Port 2000; salinity changes;mysids; anthropogenic impact |
| Auteurs | | Top |
- Dauvin, J.-C.
- Alizier, S.
- Vallet, C.
- Ruellet, T.
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| Abstract |
Using a Before/During/After protocol, the effects of Port 2000 (the Le Havre harbour extension) on the suprabenthic communities in the Northern Channel of the Seine estuary (English Channel) were examined from March 2001 to March 2009. Since the beginning of Port 2000 construction in 2002, there have been several changes in the hydrological and sedimentary characteristics in the North Channel, including changes in current velocity, bottoms salinity and sand accumulation, as well as in the benthic communities themselves, moving from mud to medium and coarse sand communities. For the suprabenthos, changes were moderate, corresponding to an increase in species richness in the upper-part of the North Channel and a decrease in species density in the dominant mysids species (i.e., mainly Mesopodospsis slabberi) over time. Due to hydrological changes since the beginning of the Port 2000 project (several years of low freshwater input) it has been difficult to attribute the biological changes to Port 2000 construction only. In the future, the results obtained for the suprabenthos will have to be compared to those obtained for the macrobenthos. Similarly, since the suprabenthos is known to play an important role in the estuarine trophic chain, it will also be essential to estimate the fish distribution in the North Channel and to examine their stomach contents to evaluate the probable changes since the Port 2000 project began. |
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