10.4.2 Data sources


10.4.2.1 Available literature 21. A desk study of available information was undertaken both to inform the initial survey design and to provide regional characterisation information for the assessment.


22.


Sources included, but were not limited to: 


 


East Anglia Offshore Wind Zone Environmental Appraisal (ZEA) (East Anglia Offshore Wind 2012);


Regional Environmental Characterisation (REC) studies (Emu 2009 and the University of Southampton and Limpenny et al. 2011);


Relevant published literature;


 Marine Life Information Network (MarLIN);  


The Mapping European Sea bed Habitat (MESH) project; and Consultation responses (See section 10.2).


10.4.2.2 Primary data sources 23. Data from three separate survey campaigns commissioned by East Anglia Offshore Wind (EAOW) have been used to inform the benthic ecology baseline. These include: surveys of the East Anglia Zone, surveys of the East Anglia ONE offshore cable corridor and site specific surveys of the East Anglia THREE site and offshore cable corridor. Data have been collected using three different sampling methodologies:


   24.


Grab samples to characterise the infauna (i.e. animals living within the sediment);


Beam trawls to characterise the epifauna (i.e. animals living attached to the sea bed); and


Video footage to identify the presence and extent of biogenic reefs (i.e. reef structures created by organisms).


Table 10.4 summarises the different surveys and methodologies that have informed the benthic assessment. For information regarding the geophysical surveys, which were used to inform the benthic Ecology assessment, please refer to Table 7.12 in Chapter 7Marine Geology, Oceanography and Physical Processes.


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 10 Benthic Ecology Page 21


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