Collated new Non-native species records for UK from 2003-2014

Data are new records of non-indigenous species made between 1st January 2003 and 31st December 2014 for Celtic Seas and Greater North Sea region. Data include the date that a new records of non-indigenous species was first made and the location of the observation. Separate data were received from Great Britain and Northern Ireland. Data were checked in Microsoft Excel 2016 for taxonomic discrepancies and formatting issues which were then addressed. Species names were cross checked with taxonomic information available in the World Register of Marine Species. Duplicated records for a species within each UK sub-region were removed so that numbers recorded for each UK sub-region were not overestimated. Crucially, it was ensured that the first record (earliest) for a species was used. The time period used was selected as it represents two six year periods (2003 to 2008 and 2009 to 2014), from which data was complete and available. The data enables comparison of new records of non-indigenous species between two 6 year reporting periods to be demonstrated.