o The structure and function (including typical species) of qualifying natural habitats and habitats of qualifying species;
o The supporting processes on which qualifying natural habitats and habitats of qualifying species rely;
o The populations of qualifying species; and o The distribution of qualifying species within the site.
79.
The key effects of development on migratory fish comprise the following: Construction o Temporary physical disturbance; o Smothering due to increased suspended sediment; o Re-mobilisation of contaminated sediments; and o Underwater noise and vibration.
Operation o Permanent habitat loss; o Physical disturbance through maintenance activities; o Smothering through increased suspended sediment; o Re-mobilisation of contaminated sediments; o Introduction of new substrate; o Underwater noise and vibration; and o Electromagnetic fields (EMF).
Decommissioning o Temporary physical disturbance; o Smothering due to increased suspended sediment; and o Underwater noise and vibration.
80. Noise injury may occur (especially to early life stages) from the installation or removal of wind turbines or cables (using percussive piling for installation of foundations or percussive methods / explosives for demolition). In addition,
HRA High Level Screening May 2014
East Anglia THREE Offshore Windfarm Page 23
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