Observation of flight patterns. Quantities as fluxes, flight altitudes and behaviour of flying birds have been taken into account.

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.

Field survey on juvenile bivalve densities October 2007Measurements made of density of chlorophyll, the velocity of the current and temperature.vessel: RV POSEIDON (IFM Geomar, Germany)sampling stations: 20 stations in OWEZ and 10 stations in each of the 5 reference areas R2, R3, R4, R5, RL (for geographic positions of stations see worksheet geographical positions stations)sampling design: 1 boxcore per stationsampling gear: NIOZ boxcorer, sampling depth 20 cm, sampling diameter 30 cmsample surface juvenile bivalves: 0.024 m2 (i.e. 3 sub-cores each with diameter 10 cm2 per boxcore)sample depth juvenile bivalves: 5 cmsorting procedure lab: stacked sieves 1.0, 0.5 and 0.2 mmfollowing worksheets describe: *number of identified juvenile bivalve species (> 0.5 mm) found per boxcore (0.024m2) and per m2Station,Date time,species,n bivalves > 0.5 mm per 0.024m2,n bivalves > 0.5 mm per m2

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.

Van een aantal mantelmeeuwen zijn hun locatie (latitude en longitude) , hoogte (altitude) en snelheid (speed) gemeten. Metingen varieren ongeveer om het uur.Periode van metingsessie indivdueel verschilt. Per mantelmeeuw kan er een periode niet gemeten zijn van begin tot eind.

Aantal vogels gemeten per soort en per vierkante kilometer. Ggemeten om de minuut en steeds op een andere locatie (longitude,latitude)