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
| one publication added to basket [218683] |
The effect of pile driving on harbour porpoises in Belgian waters
Haelters, J.; Van Roy, W.; Vigin, L.; Degraer, S. (2012). The effect of pile driving on harbour porpoises in Belgian waters, in: Degraer, S. et al. (Ed.) Offshore wind farms in the Belgian part of the North Sea: Heading for an understanding of environmental impacts. pp. 127-144
In: Degraer, S.; Brabant, R.; Rumes, B. (Ed.) (2012). Offshore wind farms in the Belgian part of the North Sea: Heading for an understanding of environmental impacts. Royal Belgian Institute of Natural Sciences, Management Unit of the North Sea Mathematical Models, Marine Ecosystem Management Unit: Brussel. 155 + annexes pp.
|
| Auteurs | | Top |
- Haelters, J.
- Van Roy, W.
- Vigin, L.
- Degraer, S.
|
|
|
| Abstract |
The impact of pile driving on marine mammals is one of the major environmental concerns in offshore wind farm (OWF) construction. We assessed the impact of pile driving for the construction of the C-Power OWF (Thorntonbank, Belgian waters) on the spatial and temporal distribution of harbour porpoises during the season in which they occur in a high density in Belgian waters. We combined data collected by passive acoustic monitoring (PAM) devices, moored inside and outside the project area, with standardised aerial surveys covering the Belgian part of the North Sea. The combination and integration of both techniques proved very useful as PAM results in low spatial but high temporal resolution data, while aerial surveys have a complementary low temporal but high spatial resolution. At the end of March 2011, just before construction activities started, aerial surveys yielded an estimate of 2.5 harbour porpoises/km2. Density estimates in mid April 2011, after the start of the co. Although a decreasing density in Belgian waters towards the end of April should be considered as normal (cf. seasonal migration), changes in the spatial distribution between pre-and post-piling suggested harbour porpoise disturbance. This pattern was further explored with PAM, which indeed showed a clear fine-scale match between acoustic harbour porpoise detections and piling activities. Immediately upon the start of piling activities, harbour porpoise detections at a few km from the piling site fell to virtually zero. After the cessation of piling it took hours to days before new detections were made at this location. Aerial surveys allowed quantifying the distance over which an apparent impact occurred at around 22 km, with a repopulation of part of the area observed after one day with no piling. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
