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Observation of species living on the bottem of the North Sea.Field survey on macrobenthos communities February 2011vessel: RV PELAGIA (NIOZ, TEXEL)sampling stations: 16 stations in OWEZ and 8 stations in each of the 6 reference areas R1, R2, R3, R4, R5, R6sampling design: 1 boxcore per stationsampling gear: NIOZ boxcorer, sampling depth 20 cm, sampling diameter 30 cmsorting procedure lab:nested sieves 11.2 mm, 6.7 mm, 2 mm, and 1 mm; identification species:macrofauna identified to species level under a stereomicroscope;polychaetes, crustaceans, molluscs and echinoderms identified to species level;juveniles and damaged animals, if unidentifiable, identified at higher taxonomic level (usually the genus); anthozoans, phoronids, oligocheates, nemerteans and turbellaria identified on their taxon level;further procedures:all individuals counted; Individual lengths (mm) of molluscs and echinoids measured;blotted wet weights of polychaetes, larger crustaceans, and ophiuroids measured to the nearest mg; remaining taxa determined per species/group. Small crustaceans (amphipods and cumaceans) only counted.
This study focuses on the behaviour of fish in response to the operation of the wind farm. Wind farms can have either negative or positive effects on fish, for instance by disturbance due to noise or by acting as a refuge because fisheries are banned within the wind farm. An important feature to determine if positive effects might occur is residence time. The longer individual fish spend in the wind farm, the stronger potential benefit of wind farms can be expected. To our knowledge this is the first study on individual behaviour of fish within wind farms. To study the potential effects of wind farms on fish behaviour, we used two approaches: tagging experiments using Peterson disc tags(mark-recapture) and telemetry experiments by following individual fish with small transmitters (VEMCO) in time. We selected two target fish species that are important for fisheries: sole Solea vulgaris as a target species potentially representing fish that use sand habitats and Atlantic cod Gadus morhua as a target species potentially representing fish that use artificial reefs such as the monopile and scour bed habitats in the wind farm. For the tagging experiment, sole was collected with a beam trawl and for the telemetry cod was caught using fising-rods.
This resource contains the following two datasets:19 Mp4/avi files containing clips of modelresults, including descriptive excel file1 excel file containing data on dipole source level spectra that were determined for the TSHDs at Maasvlakte 2Furthermore several reports are available.Taken from summary of TNO-DM_2012 R10818.PDFThe Port of Rotterdam is expanding to meet the growing demand to accommodatelarge cargo vessels. The construction of Maasvlakte 2 (MV2) started in September2008. The ‘Milieueffectrapport Aanleg Maasvlakte 2’  provided a preliminaryassessment of the underwater sound produced during the construction of MV2.One of the licence conditions for Maasvlakte 2 is the monitoring of the underwatersound produced during its construction , with an emphasis on the establishmentof acoustic source levels of the Trailing Suction Hopper Dredgers (TSHDs) duringthe various activities at MV2: dredging, transport and discharge of sediment.TNO carried out measurement and analysis activities for this monitoring. During aninitial measurement campaign in September 2008, background measurements wereperformed in the absence of dredging. Those earlier measurements are describedin . Source level and background noise measurements were made between22 September and 1 October 2009 in the MV2 dredging activities area.The measurement procedures are described in . Analysis and results for the2009 measurements are reported in . G.J.M. Meulepas, G.C. Duyckinck Dörner en W.C. van der Lans, 2007,Milieueffectrapport Aanleg Maasvlakte 2, Bijlage Milieukwaliteit, available athttp://www.maasvlakte2.com/kennisbank/Milieukwaliteit.pdf (last accessed 4October 2011) Havenbedrijf Rotterdam N.V., Projectorganisatie Maasvlakte 2, 2008,Monitoringsplan Aanleg Maasvlakte 2, available athttp://www.maasvlakte2.com/kennisbank/2008-08 Monitoringsplan AanlegMaasvlakte 2 .pdf (last accessed 4 October 2011) J. Dreschler, M.A. Ainslie, W. Groen; Measurements of underwaterbackground noise Maasvlakte 2, TNO-DV 2009 C212, May 2009, available athttp://www.noordzeeloket.nl/overig/bibliotheek.asp (last accessed 20 February2012) P.A. van Walree, M.A. Ainslie, W. Groen; Measurement plan underwatersound Maasvlakte 2, TNO-DV 2008 C302, update, February 2009 C.A.F. de Jong, M.A. Ainslie, J. Dreschler, E. Jansen, E. Heemskerk,W. Groen; Underwater noise of Trailing Suction Hopper Dredgers at Maasvlakte2: analysis of source levels and background noise, TNO-DV 2010 C335,November 2010, available at http://www.noordzeeloket.nl/overig/bibliotheek.asp(last accessed 20 February 2012).
Matroos data enzo.
Zoutgehalte bij Hoek van Holland voor 2013 op uurbasis.
Assessment of the Effects of the Offshore Wind Farm Egmond aan Zee (OWEZ) for Harbour PorpoisePurpose:"The aim of this study was to investigate whether the Offshore Wind farm Egmond aan Zee(OWEZ) has influenced the occurrence of harbour porpoises.In order to evaluate the environmental impacts of OWEZ, porpoise acoustic activity in thearea was monitored;1) during a baseline (T0) study 2003/2004 (Brasseur at al. 2004)2) after the construction of the wind farm (T1) from 2007 to 2009.The comparison between the T0 and the T1 was conducted to determine if and how harbour porpoise occurrence is affected by the presence of the wind farm. Harbour porpoise activity and presence was measured by acoustic monitoring of echolocationsounds at eight stations equipped with stationary acoustic porpoise detectors (T-PODs) whichwere permanently deployed and were operating on a 24 hour basis. During both the T0 and T1study the T-PODs functioned very well and provided a wealth ofdata. Four indicators of click activity (porpoise positive minutes, clicks per porpoise positive minutes, encounter duration and waiting time between encounters) were chosen for the analyses. These indicators can be related directly to porpoise occurrence and habitat use in the study area. To investigate a potential effect of the wind farm a statistical Before-After Control-Impact (BACI) design was used. Here conditions in the wind farm (impact area, T1) were compared to both the baseline conditions (T0) and to conditions in the nearby reference area.The acoustic results show a strong seasonal variation in harbour porpoise occurrence, with more recordings of animals in the autumn/winter/spring seasons compared to the summer months. This pattern was similar in both the T0 and in the T1 study.There was a general increase in harbour porpoise occurrence from T0 to T1 for all T-POD stations, which was confirmed by an increase in porpoise sightings in the Dutch coastal area. During T0, the spatial distribution of porpoises did not differ significantly between the impact area (wind farm) and the two reference areas north and south of the wind farm.The results of the BACI design showed that during the T1 porpoises showed a significant change in distribution between the reference areas and the impact area. A higher porpoise acoustic activity was recorded inside the wind farm relative to outside, which is most likely linked to an increase in local porpoise occurrence. Because of the introduction of new T-PODs to the study and the specific differences between individual T-PODs , the variation between these devices might have caused a higher variation in the resulting data. Thus, when interpreting the effects, one should take into account that the confidence interval of the results might be larger and that the true effect might be stronger or lower than the one reported here. However, this does not influence the overall conclusions.The cause behind the increase of porpoises in the farm could not be determined, but may be linked to increased food availability due to the reef effect of the turbine foundations and the exclusion of fishery from the wind farm. The increase of harbour porpoise acoustic activity inside the wind farm is in contrast to results from other offshore wind farms. This shows that results from one wind farm are not necessarily transferable or valid for other wind farms located in different areas."
Observation of flight patterns. Quantities as fluxes, flight altitudes and behaviour of flying birds have been taken into account.
The data contains a series of bathymetry measurements performed during the extension of the port of Rotterdam (Maasvlakte 2). The measurements were performed at the site where the dredgers collected the sand. Data are gathered with:Multi-beamSide scan SonarMagnometerData is available at various resolutions:1 x 1 m (sonar)5 x 5 m (sonar)20 x 20 m (multi-beam)2.5 x 2.5 km (multi-beam aggregate)
The main purpose of this sampling was to study the effects of the OWEZ windpark on the demersal fish community. Because before installation of the windfarm the main fisheries activity in the area was bottom trawling, it is expected that exclusion of fisheries in the wind farm has the largest effect on the demersal fish community. The wind farm and its safety zone could function as a refugium for these species. If the area functions as a refugium this could be the case for a large number of demersal fish species that occur in the Dutch coastal zone. Owing to this a positive effect of the wind farm on the demersal fish community was expected. The fisheries that occurred in the area targeted larger fish, therefore fisheries mortality was higher on the larger fish. By excluding fisheries in the farm it was expected to change the size distribution in the farm and by that the age distribution of the fish populations. A Hydrolab minisonde, attached to the net, was used for continuous CTD measurements.
Observation of many species in the benthic zone. Benthic communities on hard substrates of the offshore wind farm Egmond aan Zee (OWEZ). Including results of samples collected in scour holes.Benthos on turbines 7, 13 and 34See Report: OWEZ_R_266_T1_20120206_hard_substrate.